Add more unit / integration tests for Swaps (#16040)

jest.config.js

@@ -11,7 +11,7 @@ module.exports = {
   coverageThreshold: {
     global: {
       branches: 44,
-      functions: 42,
+      functions: 46.8,
       lines: 52,
       statements: 52,
     },

test/jest/mock-store.js

@@ -120,6 +120,13 @@ export const createSwapsMockStore = () => {
         },
       },
       fromToken: 'ETH',
+      toToken: {
+        symbol: 'USDC',
+        address: '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',
+        occurances: 4,
+      },
+      currentSmartTransactionsErrorMessageDismissed: false,
+      swapsSTXLoading: false,
     },
     metamask: {
       networkDetails: {
@@ -314,10 +321,10 @@ export const createSwapsMockStore = () => {
         fetchParams: {
           metaData: {
             sourceTokenInfo: {
-              symbol: 'BAT',
+              symbol: 'ETH',
             },
             destinationTokenInfo: {
-              symbol: 'ETH',
+              symbol: 'USDC',
             },
           },
         },
@@ -326,6 +333,10 @@ export const createSwapsMockStore = () => {
         quotesLastFetched: 1519211809934,
         swapsQuoteRefreshTime: 60000,
         swapsQuotePrefetchingRefreshTime: 60000,
+        swapsStxBatchStatusRefreshTime: 5000,
+        swapsStxGetTransactionsRefreshTime: 5000,
+        swapsStxMaxFeeMultiplier: 1.5,
+        swapsStxStatusDeadline: 150000,
         customMaxGas: '',
         customGasPrice: null,
         selectedAggId: 'TEST_AGG_2',
@@ -412,6 +423,7 @@ export const createSwapsMockStore = () => {
             {
               uuid: 'uuid2',
               status: 'success',
+              cancellable: false,
               statusMetadata: {
                 cancellationFeeWei: 36777567771000,
                 cancellationReason: 'not_cancelled',
@@ -424,6 +436,7 @@ export const createSwapsMockStore = () => {
             {
               uuid: 'uuid2',
               status: 'pending',
+              cancellable: true,
               statusMetadata: {
                 cancellationFeeWei: 36777567771000,
                 cancellationReason: 'not_cancelled',

ui/ducks/swaps/swaps.js

@@ -92,7 +92,7 @@ import {
   hexWEIToDecGWEI,
 } from '../../../shared/lib/transactions-controller-utils';
 
-const GAS_PRICES_LOADING_STATES = {
+export const GAS_PRICES_LOADING_STATES = {
   INITIAL: 'INITIAL',
   LOADING: 'LOADING',
   FAILED: 'FAILED',

ui/ducks/swaps/swaps.test.js

@@ -1,10 +1,14 @@
 import nock from 'nock';
+import configureMockStore from 'redux-mock-store';
+import thunk from 'redux-thunk';
 
 import { MOCKS, createSwapsMockStore } from '../../../test/jest';
 import { setSwapsLiveness, setSwapsFeatureFlags } from '../../store/actions';
 import { CHAIN_IDS } from '../../../shared/constants/network';
 import { setStorageItem } from '../../../shared/lib/storage-helpers';
-import * as swaps from './swaps';
+import swapsReducer, * as swaps from './swaps';
+
+const middleware = [thunk];
 
 jest.mock('../../store/actions.js', () => ({
   setSwapsLiveness: jest.fn(),
@@ -176,36 +180,200 @@ describe('Ducks - Swaps', () => {
     });
   });
 
-  describe('getCustomSwapsGas', () => {
-    it('returns "customMaxGas"', () => {
+  describe('getCustomMaxPriorityFeePerGas', () => {
+    it('returns "customMaxPriorityFeePerGas"', () => {
       const state = createSwapsMockStore();
-      const customMaxGas = '29000';
-      state.metamask.swapsState.customMaxGas = customMaxGas;
-      expect(swaps.getCustomSwapsGas(state)).toBe(customMaxGas);
+      const customMaxPriorityFeePerGas = '3';
+      state.metamask.swapsState.customMaxPriorityFeePerGas =
+        customMaxPriorityFeePerGas;
+      expect(swaps.getCustomMaxPriorityFeePerGas(state)).toBe(
+        customMaxPriorityFeePerGas,
+      );
     });
   });
 
-  describe('getCustomMaxFeePerGas', () => {
-    it('returns "customMaxFeePerGas"', () => {
+  describe('getAggregatorMetadata', () => {
+    it('returns agg metadata', () => {
       const state = createSwapsMockStore();
-      const customMaxFeePerGas = '20';
-      state.metamask.swapsState.customMaxFeePerGas = customMaxFeePerGas;
-      expect(swaps.getCustomMaxFeePerGas(state)).toBe(customMaxFeePerGas);
+      expect(swaps.getAggregatorMetadata(state)).toBe(
+        state.swaps.aggregatorMetadata,
+      );
     });
   });
 
-  describe('getCustomMaxPriorityFeePerGas', () => {
-    it('returns "customMaxPriorityFeePerGas"', () => {
+  describe('getBalanceError', () => {
+    it('returns a balance error', () => {
       const state = createSwapsMockStore();
-      const customMaxPriorityFeePerGas = '3';
-      state.metamask.swapsState.customMaxPriorityFeePerGas =
-        customMaxPriorityFeePerGas;
-      expect(swaps.getCustomMaxPriorityFeePerGas(state)).toBe(
-        customMaxPriorityFeePerGas,
+      state.swaps.balanceError = 'balanceError';
+      expect(swaps.getBalanceError(state)).toBe(state.swaps.balanceError);
+    });
+  });
+
+  describe('getFromToken', () => {
+    it('returns fromToken', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getFromToken(state)).toBe(state.swaps.fromToken);
+    });
+  });
+
+  describe('getFromTokenError', () => {
+    it('returns fromTokenError', () => {
+      const state = createSwapsMockStore();
+      state.swaps.fromTokenError = 'fromTokenError';
+      expect(swaps.getFromTokenError(state)).toBe(state.swaps.fromTokenError);
+    });
+  });
+
+  describe('getFromTokenInputValue', () => {
+    it('returns fromTokenInputValue', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getFromTokenInputValue(state)).toBe(
+        state.swaps.fromTokenInputValue,
       );
     });
   });
 
+  describe('getIsFeatureFlagLoaded', () => {
+    it('returns isFeatureFlagLoaded', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getIsFeatureFlagLoaded(state)).toBe(
+        state.swaps.isFeatureFlagLoaded,
+      );
+    });
+  });
+
+  describe('getSwapsSTXLoading', () => {
+    it('returns swapsSTXLoading', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsSTXLoading(state)).toBe(state.swaps.swapsSTXLoading);
+    });
+  });
+
+  describe('getMaxSlippage', () => {
+    it('returns maxSlippage', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getMaxSlippage(state)).toBe(state.swaps.maxSlippage);
+    });
+  });
+
+  describe('getTopAssets', () => {
+    it('returns topAssets', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getTopAssets(state)).toBe(state.swaps.topAssets);
+    });
+  });
+
+  describe('getToToken', () => {
+    it('returns toToken', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getToToken(state)).toBe(state.swaps.toToken);
+    });
+  });
+
+  describe('getFetchingQuotes', () => {
+    it('returns fetchingQuotes', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getFetchingQuotes(state)).toBe(state.swaps.fetchingQuotes);
+    });
+  });
+
+  describe('getQuotesFetchStartTime', () => {
+    it('returns quotesFetchStartTime', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getQuotesFetchStartTime(state)).toBe(
+        state.swaps.quotesFetchStartTime,
+      );
+    });
+  });
+
+  describe('getReviewSwapClickedTimestamp', () => {
+    it('returns reviewSwapClickedTimestamp', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getReviewSwapClickedTimestamp(state)).toBe(
+        state.swaps.reviewSwapClickedTimestamp,
+      );
+    });
+  });
+
+  describe('getSwapsCustomizationModalPrice', () => {
+    it('returns customGas.price', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsCustomizationModalPrice(state)).toBe(
+        state.swaps.customGas.price,
+      );
+    });
+  });
+
+  describe('getSwapsCustomizationModalLimit', () => {
+    it('returns customGas.limit', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsCustomizationModalLimit(state)).toBe(
+        state.swaps.customGas.limit,
+      );
+    });
+  });
+
+  describe('swapGasPriceEstimateIsLoading', () => {
+    it('returns true for swapGasPriceEstimateIsLoading', () => {
+      const state = createSwapsMockStore();
+      state.swaps.customGas.loading = swaps.GAS_PRICES_LOADING_STATES.LOADING;
+      expect(swaps.swapGasPriceEstimateIsLoading(state)).toBe(true);
+    });
+  });
+
+  describe('swapGasEstimateLoadingHasFailed', () => {
+    it('returns true for swapGasEstimateLoadingHasFailed', () => {
+      const state = createSwapsMockStore();
+      state.swaps.customGas.loading = swaps.GAS_PRICES_LOADING_STATES.INITIAL;
+      expect(swaps.swapGasEstimateLoadingHasFailed(state)).toBe(true);
+    });
+  });
+
+  describe('getSwapGasPriceEstimateData', () => {
+    it('returns customGas.priceEstimates', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapGasPriceEstimateData(state)).toBe(
+        state.swaps.customGas.priceEstimates,
+      );
+    });
+  });
+
+  describe('getSwapsFallbackGasPrice', () => {
+    it('returns customGas.fallBackPrice', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsFallbackGasPrice(state)).toBe(
+        state.swaps.customGas.fallBackPrice,
+      );
+    });
+  });
+
+  describe('getCurrentSmartTransactionsError', () => {
+    it('returns currentSmartTransactionsError', () => {
+      const state = createSwapsMockStore();
+      state.swaps.currentSmartTransactionsError =
+        'currentSmartTransactionsError';
+      expect(swaps.getCurrentSmartTransactionsError(state)).toBe(
+        state.swaps.currentSmartTransactionsError,
+      );
+    });
+  });
+
+  describe('getCurrentSmartTransactionsErrorMessageDismissed', () => {
+    it('returns currentSmartTransactionsErrorMessageDismissed', () => {
+      const state = createSwapsMockStore();
+      expect(
+        swaps.getCurrentSmartTransactionsErrorMessageDismissed(state),
+      ).toBe(state.swaps.currentSmartTransactionsErrorMessageDismissed);
+    });
+  });
+
+  describe('shouldShowCustomPriceTooLowWarning', () => {
+    it('returns false for showCustomPriceTooLowWarning', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.shouldShowCustomPriceTooLowWarning(state)).toBe(false);
+    });
+  });
+
   describe('getSwapsFeatureIsLive', () => {
     it('returns true for "swapsFeatureIsLive"', () => {
       const state = createSwapsMockStore();
@@ -222,19 +390,22 @@ describe('Ducks - Swaps', () => {
     });
   });
 
-  describe('getUsedQuote', () => {
-    it('returns selected quote', () => {
+  describe('getSmartTransactionsError', () => {
+    it('returns smartTransactionsError', () => {
       const state = createSwapsMockStore();
-      expect(swaps.getUsedQuote(state)).toMatchObject(
-        state.metamask.swapsState.quotes.TEST_AGG_2,
+      state.appState.smartTransactionsError = 'stxError';
+      expect(swaps.getSmartTransactionsError(state)).toBe(
+        state.appState.smartTransactionsError,
       );
     });
+  });
 
-    it('returns best quote', () => {
+  describe('getSmartTransactionsErrorMessageDismissed', () => {
+    it('returns smartTransactionsErrorMessageDismissed', () => {
       const state = createSwapsMockStore();
-      state.metamask.swapsState.selectedAggId = null;
-      expect(swaps.getUsedQuote(state)).toMatchObject(
-        state.metamask.swapsState.quotes.TEST_AGG_BEST,
+      state.appState.smartTransactionsErrorMessageDismissed = true;
+      expect(swaps.getSmartTransactionsErrorMessageDismissed(state)).toBe(
+        state.appState.smartTransactionsErrorMessageDismissed,
       );
     });
   });
@@ -288,6 +459,234 @@ describe('Ducks - Swaps', () => {
     });
   });
 
+  describe('getCurrentSmartTransactionsEnabled', () => {
+    it('returns true if STX are enabled and there is no current STX error', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getCurrentSmartTransactionsEnabled(state)).toBe(true);
+    });
+
+    it('returns false if STX are enabled and there is an current STX error', () => {
+      const state = createSwapsMockStore();
+      state.swaps.currentSmartTransactionsError =
+        'currentSmartTransactionsError';
+      expect(swaps.getCurrentSmartTransactionsEnabled(state)).toBe(false);
+    });
+  });
+
+  describe('getSwapsQuoteRefreshTime', () => {
+    it('returns swapsQuoteRefreshTime', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsQuoteRefreshTime(state)).toBe(
+        state.metamask.swapsState.swapsQuoteRefreshTime,
+      );
+    });
+  });
+
+  describe('getSwapsQuotePrefetchingRefreshTime', () => {
+    it('returns swapsQuotePrefetchingRefreshTime', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsQuotePrefetchingRefreshTime(state)).toBe(
+        state.metamask.swapsState.swapsQuotePrefetchingRefreshTime,
+      );
+    });
+  });
+
+  describe('getBackgroundSwapRouteState', () => {
+    it('returns routeState', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getBackgroundSwapRouteState(state)).toBe(
+        state.metamask.swapsState.routeState,
+      );
+    });
+  });
+
+  describe('getCustomSwapsGas', () => {
+    it('returns "customMaxGas"', () => {
+      const state = createSwapsMockStore();
+      const customMaxGas = '29000';
+      state.metamask.swapsState.customMaxGas = customMaxGas;
+      expect(swaps.getCustomSwapsGas(state)).toBe(customMaxGas);
+    });
+  });
+
+  describe('getCustomSwapsGasPrice', () => {
+    it('returns customGasPrice', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getCustomSwapsGasPrice(state)).toBe(
+        state.metamask.swapsState.customGasPrice,
+      );
+    });
+  });
+
+  describe('getCustomMaxFeePerGas', () => {
+    it('returns "customMaxFeePerGas"', () => {
+      const state = createSwapsMockStore();
+      const customMaxFeePerGas = '20';
+      state.metamask.swapsState.customMaxFeePerGas = customMaxFeePerGas;
+      expect(swaps.getCustomMaxFeePerGas(state)).toBe(customMaxFeePerGas);
+    });
+  });
+
+  describe('getSwapsUserFeeLevel', () => {
+    it('returns swapsUserFeeLevel', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsUserFeeLevel(state)).toBe(
+        state.metamask.swapsState.swapsUserFeeLevel,
+      );
+    });
+  });
+
+  describe('getFetchParams', () => {
+    it('returns fetchParams', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getFetchParams(state)).toBe(
+        state.metamask.swapsState.fetchParams,
+      );
+    });
+  });
+
+  describe('getQuotes', () => {
+    it('returns quotes for Swaps', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getQuotes(state)).toBe(state.metamask.swapsState.quotes);
+    });
+  });
+
+  describe('getQuotesLastFetched', () => {
+    it('returns quotesLastFetched', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getQuotesLastFetched(state)).toBe(
+        state.metamask.swapsState.quotesLastFetched,
+      );
+    });
+  });
+
+  describe('getSelectedQuote', () => {
+    it('returns selected quote', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSelectedQuote(state)).toBe(
+        state.metamask.swapsState.quotes.TEST_AGG_2,
+      );
+    });
+  });
+
+  describe('getSwapsErrorKey', () => {
+    it('returns errorKey', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsErrorKey(state)).toBe(
+        state.metamask.swapsState.errorKey,
+      );
+    });
+  });
+
+  describe('getShowQuoteLoadingScreen', () => {
+    it('returns showQuoteLoadingScreen', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getShowQuoteLoadingScreen(state)).toBe(
+        state.swaps.showQuoteLoadingScreen,
+      );
+    });
+  });
+
+  describe('getSwapsTokens', () => {
+    it('returns tokens', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsTokens(state)).toBe(
+        state.metamask.swapsState.tokens,
+      );
+    });
+  });
+
+  describe('getSwapsWelcomeMessageSeenStatus', () => {
+    it('returns', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getSwapsWelcomeMessageSeenStatus(state)).toBe(
+        state.metamask.swapsState.swapsWelcomeMessageHasBeenShown,
+      );
+    });
+  });
+
+  describe('getTopQuote', () => {
+    it('returns a top quote', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getTopQuote(state)).toBe(
+        state.metamask.swapsState.quotes.TEST_AGG_BEST,
+      );
+    });
+  });
+
+  describe('getApproveTxId', () => {
+    it('returns approveTxId', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getApproveTxId(state)).toBe(
+        state.metamask.swapsState.approveTxId,
+      );
+    });
+  });
+
+  describe('getTradeTxId', () => {
+    it('returns tradeTxId', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getTradeTxId(state)).toBe(
+        state.metamask.swapsState.tradeTxId,
+      );
+    });
+  });
+
+  describe('getUsedQuote', () => {
+    it('returns selected quote', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getUsedQuote(state)).toMatchObject(
+        state.metamask.swapsState.quotes.TEST_AGG_2,
+      );
+    });
+
+    it('returns best quote', () => {
+      const state = createSwapsMockStore();
+      state.metamask.swapsState.selectedAggId = null;
+      expect(swaps.getUsedQuote(state)).toMatchObject(
+        state.metamask.swapsState.quotes.TEST_AGG_BEST,
+      );
+    });
+  });
+
+  describe('getDestinationTokenInfo', () => {
+    it('returns destinationTokenInfo', () => {
+      const state = createSwapsMockStore();
+      expect(swaps.getDestinationTokenInfo(state)).toBe(
+        state.metamask.swapsState.fetchParams.metaData.destinationTokenInfo,
+      );
+    });
+  });
+
+  describe('getUsedSwapsGasPrice', () => {
+    it('returns customGasPrice', () => {
+      const state = createSwapsMockStore();
+      state.metamask.swapsState.customGasPrice = 5;
+      expect(swaps.getUsedSwapsGasPrice(state)).toBe(
+        state.metamask.swapsState.customGasPrice,
+      );
+    });
+  });
+
+  describe('getApproveTxParams', () => {
+    it('returns approveTxParams', () => {
+      const state = createSwapsMockStore();
+      state.metamask.swapsState.quotes.TEST_AGG_2.approvalNeeded = {
+        data: '0x095ea7b300000000000000000000000095e6f48254609a6ee006f7d493c8e5fb97094cef0000000000000000000000000000000000000000004a817c7ffffffdabf41c00',
+        to: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2',
+        value: '0x0',
+        from: '0x2369267687A84ac7B494daE2f1542C40E37f4455',
+        gas: '0x12',
+        gasPrice: '0x34',
+      };
+      expect(swaps.getApproveTxParams(state)).toMatchObject({
+        ...state.metamask.swapsState.quotes.TEST_AGG_2.approvalNeeded,
+        gasPrice: 5,
+      });
+    });
+  });
+
   describe('getSmartTransactionsOptInStatus', () => {
     it('returns STX opt in status', () => {
       const state = createSwapsMockStore();
@@ -325,4 +724,261 @@ describe('Ducks - Swaps', () => {
       );
     });
   });
+
+  describe('getSmartTransactionEstimatedGas', () => {
+    it('returns unsigned transactions and estimates', () => {
+      const state = createSwapsMockStore();
+      const smartTransactionFees = swaps.getSmartTransactionEstimatedGas(state);
+      expect(smartTransactionFees).toBe(
+        state.metamask.smartTransactionsState.estimatedGas,
+      );
+    });
+  });
+
+  describe('getSwapsNetworkConfig', () => {
+    it('returns Swaps network config', () => {
+      const state = createSwapsMockStore();
+      const {
+        swapsQuoteRefreshTime,
+        swapsQuotePrefetchingRefreshTime,
+        swapsStxGetTransactionsRefreshTime,
+        swapsStxBatchStatusRefreshTime,
+        swapsStxStatusDeadline,
+        swapsStxMaxFeeMultiplier,
+      } = state.metamask.swapsState;
+      const swapsNetworkConfig = swaps.getSwapsNetworkConfig(state);
+      expect(swapsNetworkConfig).toMatchObject({
+        quoteRefreshTime: swapsQuoteRefreshTime,
+        quotePrefetchingRefreshTime: swapsQuotePrefetchingRefreshTime,
+        stxGetTransactionsRefreshTime: swapsStxGetTransactionsRefreshTime,
+        stxBatchStatusRefreshTime: swapsStxBatchStatusRefreshTime,
+        stxStatusDeadline: swapsStxStatusDeadline,
+        stxMaxFeeMultiplier: swapsStxMaxFeeMultiplier,
+      });
+    });
+  });
+
+  describe('actions + reducers', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+
+    afterEach(() => {
+      store.clearActions();
+    });
+
+    describe('clearSwapsState', () => {
+      it('calls the "swaps/clearSwapsState" action', () => {
+        store.dispatch(swaps.clearSwapsState());
+        const actions = store.getActions();
+        expect(actions).toHaveLength(1);
+        expect(actions[0].type).toBe('swaps/clearSwapsState');
+      });
+    });
+
+    describe('dismissCurrentSmartTransactionsErrorMessage', () => {
+      it('calls the "swaps/dismissCurrentSmartTransactionsErrorMessage" action', () => {
+        const state = store.getState().swaps;
+        store.dispatch(swaps.dismissCurrentSmartTransactionsErrorMessage());
+        const actions = store.getActions();
+        expect(actions[0].type).toBe(
+          'swaps/dismissCurrentSmartTransactionsErrorMessage',
+        );
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.currentSmartTransactionsErrorMessageDismissed).toBe(
+          true,
+        );
+      });
+    });
+
+    describe('setAggregatorMetadata', () => {
+      it('calls the "swaps/setAggregatorMetadata" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = {
+          name: 'agg1',
+        };
+        store.dispatch(swaps.setAggregatorMetadata(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setAggregatorMetadata');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.aggregatorMetadata).toBe(actionPayload);
+      });
+    });
+
+    describe('setBalanceError', () => {
+      it('calls the "swaps/setBalanceError" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = 'balanceError';
+        store.dispatch(swaps.setBalanceError(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setBalanceError');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.balanceError).toBe(actionPayload);
+      });
+    });
+
+    describe('setFetchingQuotes', () => {
+      it('calls the "swaps/setFetchingQuotes" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = true;
+        store.dispatch(swaps.setFetchingQuotes(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setFetchingQuotes');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.fetchingQuotes).toBe(actionPayload);
+      });
+    });
+
+    describe('setSwapsFromToken', () => {
+      it('calls the "swaps/setFromToken" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = 'ETH';
+        store.dispatch(swaps.setSwapsFromToken(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setFromToken');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.fromToken).toBe(actionPayload);
+      });
+    });
+
+    describe('setFromTokenError', () => {
+      it('calls the "swaps/setFromTokenError" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = 'fromTokenError';
+        store.dispatch(swaps.setFromTokenError(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setFromTokenError');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.fromTokenError).toBe(actionPayload);
+      });
+    });
+
+    describe('setFromTokenInputValue', () => {
+      it('calls the "swaps/setFromTokenInputValue" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = '5';
+        store.dispatch(swaps.setFromTokenInputValue(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setFromTokenInputValue');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.fromTokenInputValue).toBe(actionPayload);
+      });
+    });
+
+    describe('setIsFeatureFlagLoaded', () => {
+      it('calls the "swaps/setIsFeatureFlagLoaded" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = true;
+        store.dispatch(swaps.setIsFeatureFlagLoaded(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setIsFeatureFlagLoaded');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.isFeatureFlagLoaded).toBe(actionPayload);
+      });
+    });
+
+    describe('setMaxSlippage', () => {
+      it('calls the "swaps/setMaxSlippage" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = 3;
+        store.dispatch(swaps.setMaxSlippage(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setMaxSlippage');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.maxSlippage).toBe(actionPayload);
+      });
+    });
+
+    describe('setSwapQuotesFetchStartTime', () => {
+      it('calls the "swaps/setQuotesFetchStartTime" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = '1664461886';
+        store.dispatch(swaps.setSwapQuotesFetchStartTime(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setQuotesFetchStartTime');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.quotesFetchStartTime).toBe(actionPayload);
+      });
+    });
+
+    describe('setReviewSwapClickedTimestamp', () => {
+      it('calls the "swaps/setReviewSwapClickedTimestamp" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = '1664461886';
+        store.dispatch(swaps.setReviewSwapClickedTimestamp(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setReviewSwapClickedTimestamp');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.reviewSwapClickedTimestamp).toBe(actionPayload);
+      });
+    });
+
+    describe('setTopAssets', () => {
+      it('calls the "swaps/setTopAssets" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = {
+          '0x514910771af9ca656af840dff83e8264ecf986ca': {
+            index: '0',
+          },
+          '0x04fa0d235c4abf4bcf4787af4cf447de572ef828': {
+            index: '1',
+          },
+          '0x0bc529c00c6401aef6d220be8c6ea1667f6ad93e': {
+            index: '2',
+          },
+        };
+        store.dispatch(swaps.setTopAssets(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setTopAssets');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.topAssets).toBe(actionPayload);
+      });
+    });
+
+    describe('setSwapToToken', () => {
+      it('calls the "swaps/setToToken" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = 'USDC';
+        store.dispatch(swaps.setSwapToToken(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/setToToken');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.toToken).toBe(actionPayload);
+      });
+    });
+
+    describe('swapCustomGasModalPriceEdited', () => {
+      it('calls the "swaps/swapCustomGasModalPriceEdited" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = 5;
+        store.dispatch(swaps.swapCustomGasModalPriceEdited(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/swapCustomGasModalPriceEdited');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.customGas.price).toBe(actionPayload);
+      });
+    });
+
+    describe('swapCustomGasModalLimitEdited', () => {
+      it('calls the "swaps/swapCustomGasModalLimitEdited" action', () => {
+        const state = store.getState().swaps;
+        const actionPayload = 100;
+        store.dispatch(swaps.swapCustomGasModalLimitEdited(actionPayload));
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/swapCustomGasModalLimitEdited');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.customGas.limit).toBe(actionPayload);
+      });
+    });
+
+    describe('swapCustomGasModalClosed', () => {
+      it('calls the "swaps/swapCustomGasModalClosed" action', () => {
+        const state = store.getState().swaps;
+        store.dispatch(swaps.swapCustomGasModalClosed());
+        const actions = store.getActions();
+        expect(actions[0].type).toBe('swaps/swapCustomGasModalClosed');
+        const newState = swapsReducer(state, actions[0]);
+        expect(newState.customGas.price).toBe(null);
+        expect(newState.customGas.limit).toBe(null);
+      });
+    });
+  });
 });

ui/pages/swaps/awaiting-swap/__snapshots__/awaiting-swap.test.js.snap

@@ -10,7 +10,7 @@ exports[`AwaitingSwap renders the component with initial props 1`] = `
     <span
       class="awaiting-swap__amount-and-symbol"
     >
-      ETH
+      USDC
     </span>
      will be added to your account once this transaction has processed.
      

ui/pages/swaps/awaiting-swap/awaiting-swap.js

@@ -283,6 +283,7 @@ export default function AwaitingSwap({
       ) : null}
       <SwapsFooter
         onSubmit={async () => {
+          /* istanbul ignore next */
           if (errorKey === OFFLINE_FOR_MAINTENANCE) {
             await dispatch(prepareToLeaveSwaps());
             history.push(DEFAULT_ROUTE);

ui/pages/swaps/awaiting-swap/awaiting-swap.test.js

@@ -1,13 +1,26 @@
 import React from 'react';
 import configureMockStore from 'redux-mock-store';
+import thunk from 'redux-thunk';
 
 import {
   renderWithProvider,
   createSwapsMockStore,
+  setBackgroundConnection,
+  fireEvent,
 } from '../../../../test/jest';
-import { SLIPPAGE } from '../../../../shared/constants/swaps';
+import {
+  SLIPPAGE,
+  QUOTES_EXPIRED_ERROR,
+  SWAP_FAILED_ERROR,
+  ERROR_FETCHING_QUOTES,
+  QUOTES_NOT_AVAILABLE_ERROR,
+  CONTRACT_DATA_DISABLED_ERROR,
+  OFFLINE_FOR_MAINTENANCE,
+} from '../../../../shared/constants/swaps';
 import AwaitingSwap from '.';
 
+const middleware = [thunk];
+
 const createProps = (customProps = {}) => {
   return {
     swapComplete: false,
@@ -20,20 +33,25 @@ const createProps = (customProps = {}) => {
   };
 };
 
+setBackgroundConnection({
+  stopPollingForQuotes: jest.fn(),
+});
+
 describe('AwaitingSwap', () => {
   it('renders the component with initial props', () => {
     const store = configureMockStore()(createSwapsMockStore());
-    const { getByText } = renderWithProvider(
+    const { getByText, getByTestId } = renderWithProvider(
       <AwaitingSwap {...createProps()} />,
       store,
     );
     expect(getByText('Processing')).toBeInTheDocument();
-    expect(getByText('ETH')).toBeInTheDocument();
+    expect(getByText('USDC')).toBeInTheDocument();
     expect(getByText('View in activity')).toBeInTheDocument();
     expect(
       document.querySelector('.awaiting-swap__main-description'),
     ).toMatchSnapshot();
     expect(getByText('View in activity')).toBeInTheDocument();
+    expect(getByTestId('page-container-footer-next')).toBeInTheDocument();
   });
 
   it('renders the component with for completed swap', () => {
@@ -43,8 +61,110 @@ describe('AwaitingSwap', () => {
       store,
     );
     expect(getByText('Transaction complete')).toBeInTheDocument();
-    expect(getByText('tokens received: ETH')).toBeInTheDocument();
+    expect(getByText('tokens received: USDC')).toBeInTheDocument();
     expect(getByText('View Swap at etherscan.io')).toBeInTheDocument();
     expect(getByText('Create a new swap')).toBeInTheDocument();
   });
+
+  it('renders the component with the "OFFLINE_FOR_MAINTENANCE" error', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({
+      errorKey: OFFLINE_FOR_MAINTENANCE,
+    });
+    const { getByText } = renderWithProvider(
+      <AwaitingSwap {...props} />,
+      store,
+    );
+    expect(getByText('Offline for maintenance')).toBeInTheDocument();
+    expect(
+      getByText(
+        'MetaMask Swaps is undergoing maintenance. Please check back later.',
+      ),
+    ).toBeInTheDocument();
+    expect(getByText('Close')).toBeInTheDocument();
+  });
+
+  it('renders the component with the "SWAP_FAILED_ERROR" error', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({
+      errorKey: SWAP_FAILED_ERROR,
+    });
+    const { getByText } = renderWithProvider(
+      <AwaitingSwap {...props} />,
+      store,
+    );
+    expect(getByText('Swap failed')).toBeInTheDocument();
+    fireEvent.click(getByText('metamask-flask.zendesk.com'));
+    expect(getByText('Try again')).toBeInTheDocument();
+  });
+
+  it('renders the component with the "QUOTES_EXPIRED_ERROR" error', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({
+      errorKey: QUOTES_EXPIRED_ERROR,
+    });
+    const { getByText } = renderWithProvider(
+      <AwaitingSwap {...props} />,
+      store,
+    );
+    expect(getByText('Quotes timeout')).toBeInTheDocument();
+    expect(
+      getByText('Please request new quotes to get the latest rates.'),
+    ).toBeInTheDocument();
+    expect(getByText('Try again')).toBeInTheDocument();
+  });
+
+  it('renders the component with the "ERROR_FETCHING_QUOTES" error', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({
+      errorKey: ERROR_FETCHING_QUOTES,
+    });
+    const { getByText } = renderWithProvider(
+      <AwaitingSwap {...props} />,
+      store,
+    );
+    expect(getByText('Error fetching quotes')).toBeInTheDocument();
+    expect(
+      getByText(
+        'Hmmm... something went wrong. Try again, or if errors persist, contact customer support.',
+      ),
+    ).toBeInTheDocument();
+    expect(getByText('Back')).toBeInTheDocument();
+  });
+
+  it('renders the component with the "QUOTES_NOT_AVAILABLE_ERROR" error', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({
+      errorKey: QUOTES_NOT_AVAILABLE_ERROR,
+    });
+    const { getByText } = renderWithProvider(
+      <AwaitingSwap {...props} />,
+      store,
+    );
+    expect(getByText('No quotes available')).toBeInTheDocument();
+    expect(
+      getByText('Try adjusting the amount or slippage settings and try again.'),
+    ).toBeInTheDocument();
+    expect(getByText('Try again')).toBeInTheDocument();
+  });
+
+  it('renders the component with the "CONTRACT_DATA_DISABLED_ERROR" error', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({
+      errorKey: CONTRACT_DATA_DISABLED_ERROR,
+    });
+    const { getByText } = renderWithProvider(
+      <AwaitingSwap {...props} />,
+      store,
+    );
+    expect(
+      getByText('Contract data is not enabled on your Ledger'),
+    ).toBeInTheDocument();
+    expect(
+      getByText(
+        'In the Ethereum app on your Ledger, go to "Settings" and allow contract data. Then, try your swap again.',
+      ),
+    ).toBeInTheDocument();
+    expect(getByText('Try again')).toBeInTheDocument();
+  });
 });

ui/pages/swaps/build-quote/build-quote.js

@@ -481,6 +481,7 @@ export default function BuildQuote({
         className="build-quote__token-etherscan-link build-quote__underline"
         key="build-quote-etherscan-link"
         onClick={() => {
+          /* istanbul ignore next */
           trackEvent({
             event: EVENT_NAMES.EXTERNAL_LINK_CLICKED,
             category: EVENT.CATEGORIES.SWAPS,
@@ -678,6 +679,7 @@ export default function BuildQuote({
           onSelect={onFromSelect}
           itemsToSearch={tokensToSearchSwapFrom}
           onInputChange={(value) => {
+            /* istanbul ignore next */
             onInputChange(value, fromTokenBalance);
           }}
           inputValue={fromTokenInputValue}
@@ -732,6 +734,7 @@ export default function BuildQuote({
         <div className="build-quote__swap-arrows-row">
           <button
             className="build-quote__swap-arrows"
+            data-testid="build-quote__swap-arrows"
             onClick={() => {
               onToSelect(selectedFromToken);
               onFromSelect(selectedToToken);
@@ -781,6 +784,7 @@ export default function BuildQuote({
                 </div>
               }
               primaryAction={
+                /* istanbul ignore next */
                 verificationClicked
                   ? null
                   : {
@@ -809,6 +813,7 @@ export default function BuildQuote({
                       className="build-quote__token-etherscan-link"
                       key="build-quote-etherscan-link"
                       onClick={() => {
+                        /* istanbul ignore next */
                         trackEvent({
                           event: 'Clicked Block Explorer Link',
                           category: EVENT.CATEGORIES.SWAPS,
@@ -861,7 +866,9 @@ export default function BuildQuote({
         )}
       </div>
       <SwapsFooter
-        onSubmit={async () => {
+        onSubmit={
+          /* istanbul ignore next */
+          async () => {
             // We need this to know how long it took to go from clicking on the Review swap button to rendered View Quote page.
             dispatch(setReviewSwapClickedTimestamp(Date.now()));
             // In case that quotes prefetching is waiting to be executed, but hasn't started yet,
@@ -884,7 +891,8 @@ export default function BuildQuote({
               await dispatch(setBackgroundSwapRouteState('loading'));
               history.push(LOADING_QUOTES_ROUTE);
             }
-        }}
+          }
+        }
         submitText={t('swapReviewSwap')}
         disabled={isReviewSwapButtonDisabled}
         hideCancel

ui/pages/swaps/build-quote/build-quote.test.js

@@ -6,7 +6,13 @@ import {
   renderWithProvider,
   createSwapsMockStore,
   setBackgroundConnection,
+  fireEvent,
 } from '../../../../test/jest';
+import {
+  setSwapsFromToken,
+  setSwapToToken,
+  setFromTokenInputValue,
+} from '../../../ducks/swaps/swaps';
 import BuildQuote from '.';
 
 const middleware = [thunk];
@@ -27,16 +33,46 @@ setBackgroundConnection({
   clearSwapsQuotes: jest.fn(),
   stopPollingForQuotes: jest.fn(),
   clearSmartTransactionFees: jest.fn(),
+  setSwapsFromToken: jest.fn(),
+  setSwapToToken: jest.fn(),
+  setFromTokenInputValue: jest.fn(),
+});
+
+jest.mock('../../../ducks/swaps/swaps', () => {
+  const actual = jest.requireActual('../../../ducks/swaps/swaps');
+  return {
+    ...actual,
+    setSwapsFromToken: jest.fn(),
+    setSwapToToken: jest.fn(),
+    setFromTokenInputValue: jest.fn(() => {
+      return {
+        type: 'MOCK_ACTION',
+      };
+    }),
+  };
+});
+
+jest.mock('../swaps.util', () => {
+  const actual = jest.requireActual('../swaps.util');
+  return {
+    ...actual,
+    fetchTokenBalance: jest.fn(() => Promise.resolve()),
+    fetchTokenPrice: jest.fn(() => Promise.resolve()),
+  };
 });
 
 describe('BuildQuote', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
   it('renders the component with initial props', () => {
     const store = configureMockStore(middleware)(createSwapsMockStore());
     const props = createProps();
     const { getByText } = renderWithProvider(<BuildQuote {...props} />, store);
     expect(getByText('Swap from')).toBeInTheDocument();
     expect(getByText('Swap to')).toBeInTheDocument();
-    expect(getByText('ETH')).toBeInTheDocument();
+    expect(getByText('Select')).toBeInTheDocument();
     expect(getByText('Slippage tolerance')).toBeInTheDocument();
     expect(getByText('2%')).toBeInTheDocument();
     expect(getByText('3%')).toBeInTheDocument();
@@ -45,4 +81,86 @@ describe('BuildQuote', () => {
       document.querySelector('.slippage-buttons__button-group'),
     ).toMatchSnapshot();
   });
+
+  it('switches swap from and to tokens', () => {
+    const setSwapFromTokenMock = jest.fn(() => {
+      return {
+        type: 'MOCK_ACTION',
+      };
+    });
+    setSwapsFromToken.mockImplementation(setSwapFromTokenMock);
+    const setSwapToTokenMock = jest.fn(() => {
+      return {
+        type: 'MOCK_ACTION',
+      };
+    });
+    setSwapToToken.mockImplementation(setSwapToTokenMock);
+    const mockStore = createSwapsMockStore();
+    const store = configureMockStore(middleware)(mockStore);
+    const props = createProps();
+    const { getByText, getByTestId } = renderWithProvider(
+      <BuildQuote {...props} />,
+      store,
+    );
+    expect(getByText('Swap from')).toBeInTheDocument();
+    fireEvent.click(getByTestId('build-quote__swap-arrows'));
+    expect(setSwapsFromToken).toHaveBeenCalledWith(mockStore.swaps.toToken);
+    expect(setSwapToToken).toHaveBeenCalled();
+  });
+
+  it('renders the block explorer link, only 1 verified source', () => {
+    const mockStore = createSwapsMockStore();
+    mockStore.swaps.toToken.occurances = 1;
+    const store = configureMockStore(middleware)(mockStore);
+    const props = createProps();
+    const { getByText } = renderWithProvider(<BuildQuote {...props} />, store);
+    expect(getByText('Swap from')).toBeInTheDocument();
+    expect(getByText('Only verified on 1 source.')).toBeInTheDocument();
+    expect(getByText('Etherscan')).toBeInTheDocument();
+  });
+
+  it('renders the block explorer link, 0 verified sources', () => {
+    const mockStore = createSwapsMockStore();
+    mockStore.swaps.toToken.occurances = 0;
+    const store = configureMockStore(middleware)(mockStore);
+    const props = createProps();
+    const { getByText } = renderWithProvider(<BuildQuote {...props} />, store);
+    expect(getByText('Swap from')).toBeInTheDocument();
+    expect(
+      getByText('This token has been added manually.'),
+    ).toBeInTheDocument();
+    expect(getByText('Etherscan')).toBeInTheDocument();
+  });
+
+  it('clicks on a block explorer link', () => {
+    global.platform = { openTab: jest.fn() };
+    const mockStore = createSwapsMockStore();
+    mockStore.swaps.toToken.occurances = 1;
+    const store = configureMockStore(middleware)(mockStore);
+    const props = createProps();
+    const { getByText } = renderWithProvider(<BuildQuote {...props} />, store);
+    const blockExplorer = getByText('Etherscan');
+    expect(blockExplorer).toBeInTheDocument();
+    fireEvent.click(blockExplorer);
+    expect(global.platform.openTab).toHaveBeenCalledWith({
+      url: 'https://etherscan.io/token/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',
+    });
+  });
+
+  it('clicks on the "max" link', () => {
+    const setFromTokenInputValueMock = jest.fn(() => {
+      return {
+        type: 'MOCK_ACTION',
+      };
+    });
+    setFromTokenInputValue.mockImplementation(setFromTokenInputValueMock);
+    const mockStore = createSwapsMockStore();
+    mockStore.swaps.fromToken = 'DAI';
+    const store = configureMockStore(middleware)(mockStore);
+    const props = createProps();
+    const { getByText } = renderWithProvider(<BuildQuote {...props} />, store);
+    const maxLink = getByText('Max');
+    fireEvent.click(maxLink);
+    expect(setFromTokenInputValue).toHaveBeenCalled();
+  });
 });

ui/pages/swaps/create-new-swap/create-new-swap.test.js

@@ -1,12 +1,20 @@
 import React from 'react';
 import configureMockStore from 'redux-mock-store';
+import thunk from 'redux-thunk';
 
 import {
   renderWithProvider,
   createSwapsMockStore,
+  fireEvent,
+  setBackgroundConnection,
 } from '../../../../test/jest';
+import {
+  setSwapsFromToken,
+  navigateBackToBuildQuote,
+} from '../../../ducks/swaps/swaps';
 import CreateNewSwap from '.';
 
+const middleware = [thunk];
 const createProps = (customProps = {}) => {
   return {
     sensitiveProperties: {},
@@ -14,7 +22,28 @@ const createProps = (customProps = {}) => {
   };
 };
 
+const backgroundConnection = {
+  navigateBackToBuildQuote: jest.fn(),
+  setBackgroundSwapRouteState: jest.fn(),
+  navigatedBackToBuildQuote: jest.fn(),
+};
+
+setBackgroundConnection(backgroundConnection);
+
+jest.mock('../../../ducks/swaps/swaps', () => {
+  const actual = jest.requireActual('../../../ducks/swaps/swaps');
+  return {
+    ...actual,
+    setSwapsFromToken: jest.fn(),
+    navigateBackToBuildQuote: jest.fn(),
+  };
+});
+
 describe('CreateNewSwap', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
   it('renders the component with initial props', () => {
     const store = configureMockStore()(createSwapsMockStore());
     const props = createProps();
@@ -24,4 +53,28 @@ describe('CreateNewSwap', () => {
     );
     expect(getByText('Create a new swap')).toBeInTheDocument();
   });
+
+  it('clicks on the Make another swap link', async () => {
+    const setSwapFromTokenMock = jest.fn(() => {
+      return {
+        type: 'MOCK_ACTION',
+      };
+    });
+    setSwapsFromToken.mockImplementation(setSwapFromTokenMock);
+    const navigateBackToBuildQuoteMock = jest.fn(() => {
+      return {
+        type: 'MOCK_ACTION',
+      };
+    });
+    navigateBackToBuildQuote.mockImplementation(navigateBackToBuildQuoteMock);
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps();
+    const { getByText } = renderWithProvider(
+      <CreateNewSwap {...props} />,
+      store,
+    );
+    await fireEvent.click(getByText('Create a new swap'));
+    expect(setSwapFromTokenMock).toHaveBeenCalledTimes(1);
+    expect(navigateBackToBuildQuoteMock).toHaveBeenCalledTimes(1);
+  });
 });

ui/pages/swaps/dropdown-input-pair/dropdown-input-pair.test.js

@@ -4,11 +4,13 @@ import configureMockStore from 'redux-mock-store';
 import {
   renderWithProvider,
   createSwapsMockStore,
+  fireEvent,
 } from '../../../../test/jest';
 import DropdownInputPair from '.';
 
 const createProps = (customProps = {}) => {
   return {
+    onInputChange: jest.fn(),
     ...customProps,
   };
 };
@@ -26,4 +28,17 @@ describe('DropdownInputPair', () => {
       document.querySelector('.dropdown-input-pair__input'),
     ).toMatchSnapshot();
   });
+
+  it('changes the input field', () => {
+    const store = configureMockStore()(createSwapsMockStore());
+    const props = createProps();
+    const { getByPlaceholderText } = renderWithProvider(
+      <DropdownInputPair {...props} />,
+      store,
+    );
+    fireEvent.change(getByPlaceholderText('0'), {
+      target: { value: 1.1 },
+    });
+    expect(props.onInputChange).toHaveBeenCalledWith('1.1');
+  });
 });

ui/pages/swaps/dropdown-search-list/__snapshots__/dropdown-search-list.test.js.snap

@@ -4,6 +4,7 @@ exports[`DropdownSearchList renders the component with initial props 1`] = `
 <div>
   <div
     class="dropdown-search-list"
+    data-testid="dropdown-search-list"
     tabindex="0"
   >
     <div

ui/pages/swaps/dropdown-search-list/dropdown-search-list.js

@@ -91,6 +91,7 @@ export default function DropdownSearchList({
     setIsImportTokenModalOpen(true);
   };
 
+  /* istanbul ignore next */
   const onImportTokenClick = () => {
     trackEvent({
       event: 'Token Imported',
@@ -167,6 +168,7 @@ export default function DropdownSearchList({
   return (
     <div
       className={classnames('dropdown-search-list', className)}
+      data-testid="dropdown-search-list"
       onClick={onClickSelector}
       onKeyUp={onKeyUp}
       tabIndex="0"
@@ -216,6 +218,7 @@ export default function DropdownSearchList({
           <SearchableItemList
             itemsToSearch={loading ? [] : itemsToSearch}
             Placeholder={() =>
+              /* istanbul ignore next */
               loading ? (
                 <div className="dropdown-search-list__loading-item">
                   <PulseLoader />
@@ -286,6 +289,7 @@ export default function DropdownSearchList({
           />
           <div
             className="dropdown-search-list__close-area"
+            data-testid="dropdown-search-list__close-area"
             onClick={(event) => {
               event.stopPropagation();
               setIsOpen(false);

ui/pages/swaps/dropdown-search-list/dropdown-search-list.test.js

@@ -4,6 +4,7 @@ import configureMockStore from 'redux-mock-store';
 import {
   renderWithProvider,
   createSwapsMockStore,
+  fireEvent,
 } from '../../../../test/jest';
 import DropdownSearchList from '.';
 
@@ -17,6 +18,8 @@ const createProps = (customProps = {}) => {
   };
 };
 
+jest.mock('../searchable-item-list', () => jest.fn(() => null));
+
 describe('DropdownSearchList', () => {
   it('renders the component with initial props', () => {
     const store = configureMockStore()(createSwapsMockStore());
@@ -28,4 +31,20 @@ describe('DropdownSearchList', () => {
     expect(container).toMatchSnapshot();
     expect(getByText('symbol')).toBeInTheDocument();
   });
+
+  it('renders the component, opens the list and closes it', () => {
+    const store = configureMockStore()(createSwapsMockStore());
+    const props = createProps();
+    const { getByTestId } = renderWithProvider(
+      <DropdownSearchList {...props} />,
+      store,
+    );
+    const dropdownSearchList = getByTestId('dropdown-search-list');
+    expect(dropdownSearchList).toBeInTheDocument();
+    fireEvent.click(dropdownSearchList);
+    const closeButton = getByTestId('dropdown-search-list__close-area');
+    expect(closeButton).toBeInTheDocument();
+    fireEvent.click(closeButton);
+    expect(closeButton).not.toBeInTheDocument();
+  });
 });

ui/pages/swaps/exchange-rate-display/__snapshots__/exchange-rate-display.test.js.snap

@@ -10,6 +10,7 @@ exports[`ExchangeRateDisplay renders the component with initial props 1`] = `
     </span>
     <span
       class="exchange-rate-display__bold"
+      data-testid="exchange-rate-display__base-symbol"
     >
       ETH
     </span>
@@ -26,6 +27,7 @@ exports[`ExchangeRateDisplay renders the component with initial props 1`] = `
     </span>
     <div
       class="exchange-rate-display__switch-arrows"
+      data-testid="exchange-rate-display__switch-arrows"
     >
       <svg
         fill="none"

ui/pages/swaps/exchange-rate-display/exchange-rate-display.js

@@ -66,6 +66,7 @@ export default function ExchangeRateDisplay({
       <span>1</span>
       <span
         className={classnames({ 'exchange-rate-display__bold': boldSymbols })}
+        data-testid="exchange-rate-display__base-symbol"
       >
         {baseSymbol}
       </span>
@@ -80,6 +81,7 @@ export default function ExchangeRateDisplay({
         className={classnames('exchange-rate-display__switch-arrows', {
           'exchange-rate-display__switch-arrows-rotate': rotating,
         })}
+        data-testid="exchange-rate-display__switch-arrows"
         onClick={() => {
           setShowPrimaryToSecondary(!showPrimaryToSecondary);
           setRotating(true);

ui/pages/swaps/exchange-rate-display/exchange-rate-display.test.js

@@ -1,6 +1,6 @@
 import React from 'react';
 
-import { renderWithProvider } from '../../../../test/jest';
+import { renderWithProvider, fireEvent } from '../../../../test/jest';
 import ExchangeRateDisplay from '.';
 
 const createProps = (customProps = {}) => {
@@ -25,4 +25,18 @@ describe('ExchangeRateDisplay', () => {
     expect(getByText(props.secondaryTokenSymbol)).toBeInTheDocument();
     expect(container).toMatchSnapshot();
   });
+
+  it('clicks on the switch link', () => {
+    const props = createProps();
+    const { getByTestId } = renderWithProvider(
+      <ExchangeRateDisplay {...props} />,
+    );
+    expect(getByTestId('exchange-rate-display__base-symbol')).toHaveTextContent(
+      'ETH',
+    );
+    fireEvent.click(getByTestId('exchange-rate-display__switch-arrows'));
+    expect(getByTestId('exchange-rate-display__base-symbol')).toHaveTextContent(
+      'BAT',
+    );
+  });
 });

ui/pages/swaps/fee-card/__snapshots__/fee-card.test.js.snap

@@ -3,3 +3,32 @@
 exports[`FeeCard renders the component with EIP-1559 enabled 1`] = `null`;
 
 exports[`FeeCard renders the component with initial props 1`] = `null`;
+
+exports[`FeeCard renders the component with initial props 2`] = `
+<div
+  class="info-tooltip"
+>
+  <div
+    class="fee-card__row-label fee-card__info-tooltip-container"
+  >
+    <div
+      aria-describedby="tippy-tooltip-1"
+      class="info-tooltip__tooltip-container fee-card__info-tooltip-content-container"
+      data-original-title="null"
+      data-tooltipped=""
+      style="display: inline;"
+      tabindex="0"
+    >
+      <svg
+        viewBox="0 0 10 10"
+        xmlns="http://www.w3.org/2000/svg"
+      >
+        <path
+          d="M5 0C2.2 0 0 2.2 0 5s2.2 5 5 5 5-2.2 5-5-2.2-5-5-5zm0 2c.4 0 .7.3.7.7s-.3.7-.7.7-.7-.2-.7-.6.3-.8.7-.8zm.7 6H4.3V4.3h1.5V8z"
+          fill="var(--color-icon-alternative)"
+        />
+      </svg>
+    </div>
+  </div>
+</div>
+`;

ui/pages/swaps/fee-card/fee-card.js

@@ -31,6 +31,7 @@ export default function FeeCard({
 }) {
   const t = useContext(I18nContext);
 
+  /* istanbul ignore next */
   const getTranslatedNetworkName = () => {
     switch (chainId) {
       case CHAIN_IDS.MAINNET:
@@ -84,6 +85,7 @@ export default function FeeCard({
                           <a
                             className="fee-card__link"
                             onClick={() => {
+                              /* istanbul ignore next */
                               trackEvent({
                                 event: 'Clicked "Gas Fees: Learn More" Link',
                                 category: EVENT.CATEGORIES.SWAPS,

ui/pages/swaps/fee-card/fee-card.test.js

@@ -8,6 +8,7 @@ import {
   createSwapsMockStore,
   setBackgroundConnection,
   MOCKS,
+  fireEvent,
 } from '../../../../test/jest';
 import { CHAIN_IDS } from '../../../../shared/constants/network';
 
@@ -104,6 +105,8 @@ describe('FeeCard', () => {
     expect(
       document.querySelector('.fee-card__top-bordered-row'),
     ).toMatchSnapshot();
+    expect(document.querySelector('.info-tooltip')).toMatchSnapshot();
+    expect(getByText('Edit limit')).toBeInTheDocument();
   });
 
   it('renders the component with EIP-1559 enabled', () => {
@@ -145,4 +148,23 @@ describe('FeeCard', () => {
     expect(getByText(`: ${props.secondaryFee.maxFee}`)).toBeInTheDocument();
     expect(queryByTestId('fee-card__edit-link')).not.toBeInTheDocument();
   });
+
+  it('renders the component with hidden token approval row', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({
+      hideTokenApprovalRow: true,
+    });
+    const { queryByText } = renderWithProvider(<FeeCard {...props} />, store);
+    expect(queryByText('Edit limit')).not.toBeInTheDocument();
+  });
+
+  it('approves a token', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({
+      onTokenApprovalClick: jest.fn(),
+    });
+    const { queryByText } = renderWithProvider(<FeeCard {...props} />, store);
+    fireEvent.click(queryByText('Edit limit'));
+    expect(props.onTokenApprovalClick).toHaveBeenCalled();
+  });
 });

ui/pages/swaps/main-quote-summary/__snapshots__/main-quote-summary.test.js.snap

@@ -77,6 +77,7 @@ exports[`MainQuoteSummary renders the component with initial props 4`] = `
     </span>
     <span
       class=""
+      data-testid="exchange-rate-display__base-symbol"
     >
       ETH
     </span>
@@ -93,6 +94,7 @@ exports[`MainQuoteSummary renders the component with initial props 4`] = `
     </span>
     <div
       class="exchange-rate-display__switch-arrows"
+      data-testid="exchange-rate-display__switch-arrows"
     >
       <svg
         fill="none"

ui/pages/swaps/searchable-item-list/__snapshots__/searchable-item-list.test.js.snap

@@ -39,6 +39,7 @@ exports[`SearchableItemList renders the component with initial props 1`] = `
 exports[`SearchableItemList renders the component with initial props 2`] = `
 <div
   class="searchable-item-list__item searchable-item-list__item--selected"
+  data-testid="searchable-item-list__item"
   tabindex="0"
 >
   <img

ui/pages/swaps/searchable-item-list/item-list/__snapshots__/item-list.component.test.js.snap

@@ -0,0 +1,47 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`ItemList renders the component with initial props 1`] = `
+<div
+  class="searchable-item-list__item searchable-item-list__item--selected"
+  data-testid="searchable-item-list__item"
+  tabindex="0"
+>
+  <img
+    alt="primaryLabel"
+    class="url-icon"
+    src="iconUrl"
+  />
+  <div
+    class="searchable-item-list__labels"
+  >
+    <div
+      class="searchable-item-list__item-labels"
+    >
+      <span
+        class="searchable-item-list__primary-label"
+      >
+        primaryLabel
+      </span>
+      <span
+        class="searchable-item-list__secondary-label"
+      >
+        secondaryLabel
+      </span>
+    </div>
+    <div
+      class="searchable-item-list__right-labels"
+    >
+      <span
+        class="searchable-item-list__right-primary-label"
+      >
+        rightPrimaryLabel
+      </span>
+      <span
+        class="searchable-item-list__right-secondary-label"
+      >
+        rightSecondaryLabel
+      </span>
+    </div>
+  </div>
+</div>
+`;

ui/pages/swaps/searchable-item-list/item-list/item-list.component.js

@@ -89,6 +89,7 @@ export default function ItemList({
                 'searchable-item-list__item--selected': selected,
                 'searchable-item-list__item--disabled': disabled,
               })}
+              data-testid="searchable-item-list__item"
               onClick={onClick}
               onKeyUp={(e) => e.key === 'Enter' && onClick()}
               key={`searchable-item-list-item-${i}`}
@@ -150,6 +151,7 @@ export default function ItemList({
                 <a
                   key="searchable-item-list__etherscan-link"
                   onClick={() => {
+                    /* istanbul ignore next */
                     trackEvent({
                       event: 'Clicked Block Explorer Link',
                       category: EVENT.CATEGORIES.SWAPS,

ui/pages/swaps/searchable-item-list/item-list/item-list.component.test.js

@@ -0,0 +1,82 @@
+import React from 'react';
+import configureMockStore from 'redux-mock-store';
+
+import {
+  renderWithProvider,
+  createSwapsMockStore,
+  fireEvent,
+} from '../../../../../test/jest';
+import ItemList from '.';
+
+const createProps = (customProps = {}) => {
+  return {
+    defaultToAll: true,
+    listTitle: 'listTitle',
+    onClickItem: jest.fn(),
+    results: [
+      {
+        iconUrl: 'iconUrl',
+        selected: true,
+        primaryLabel: 'primaryLabel',
+        secondaryLabel: 'secondaryLabel',
+        rightPrimaryLabel: 'rightPrimaryLabel',
+        rightSecondaryLabel: 'rightSecondaryLabel',
+      },
+    ],
+    fuseSearchKeys: [
+      {
+        name: 'name',
+        weight: 0.499,
+      },
+      {
+        name: 'symbol',
+        weight: 0.499,
+      },
+      {
+        name: 'address',
+        weight: 0.002,
+      },
+    ],
+    ...customProps,
+  };
+};
+
+describe('ItemList', () => {
+  it('renders the component with initial props', () => {
+    const store = configureMockStore()(createSwapsMockStore());
+    const props = createProps();
+    const { getByText } = renderWithProvider(<ItemList {...props} />, store);
+    expect(getByText(props.listTitle)).toBeInTheDocument();
+    expect(
+      document.querySelector('.searchable-item-list__item'),
+    ).toMatchSnapshot();
+  });
+
+  it('clicks on a list item', () => {
+    const store = configureMockStore()(createSwapsMockStore());
+    const props = createProps();
+    const { getByText, getByTestId } = renderWithProvider(
+      <ItemList {...props} />,
+      store,
+    );
+    expect(getByText(props.listTitle)).toBeInTheDocument();
+    fireEvent.click(getByTestId('searchable-item-list__item'));
+    expect(props.onClickItem).toHaveBeenCalledWith(props.results[0]);
+  });
+
+  it('presses the "Enter" key on a list item', () => {
+    const store = configureMockStore()(createSwapsMockStore());
+    const props = createProps();
+    const { getByText, getByTestId } = renderWithProvider(
+      <ItemList {...props} />,
+      store,
+    );
+    expect(getByText(props.listTitle)).toBeInTheDocument();
+    fireEvent.keyUp(getByTestId('searchable-item-list__item'), {
+      key: 'Enter',
+      code: 'Enter',
+      charCode: 13,
+    });
+    expect(props.onClickItem).toHaveBeenCalledWith(props.results[0]);
+  });
+});

ui/pages/swaps/searchable-item-list/list-item-search/list-item-search.component.test.js

@@ -0,0 +1,107 @@
+import React from 'react';
+import configureMockStore from 'redux-mock-store';
+import thunk from 'redux-thunk';
+
+import {
+  renderWithProvider,
+  createSwapsMockStore,
+  fireEvent,
+} from '../../../../../test/jest';
+import ListItemSearch from './list-item-search.component';
+
+const token = {
+  erc20: true,
+  symbol: 'BAT',
+  decimals: 18,
+  address: '0x0D8775F648430679A709E98d2b0Cb6250d2887EF',
+};
+
+jest.mock('../../swaps.util', () => {
+  const original = jest.requireActual('../../swaps.util');
+  return {
+    ...original,
+    fetchToken: jest.fn(() => {
+      return token;
+    }),
+  };
+});
+
+const createProps = (customProps = {}) => {
+  return {
+    onSearch: jest.fn(),
+    setSearchQuery: jest.fn(),
+    listToSearch: [
+      {
+        iconUrl: 'iconUrl',
+        selected: true,
+        primaryLabel: 'primaryLabel',
+        secondaryLabel: 'secondaryLabel',
+        rightPrimaryLabel: 'rightPrimaryLabel',
+        rightSecondaryLabel: 'rightSecondaryLabel',
+      },
+    ],
+    fuseSearchKeys: [
+      {
+        name: 'name',
+        weight: 0.499,
+      },
+      {
+        name: 'symbol',
+        weight: 0.499,
+      },
+      {
+        name: 'address',
+        weight: 0.002,
+      },
+    ],
+    searchPlaceholderText: 'Search token',
+    defaultToAll: true,
+    ...customProps,
+  };
+};
+
+const middleware = [thunk];
+
+describe('ListItemSearch', () => {
+  it('renders the component with initial props', () => {
+    const store = configureMockStore()(createSwapsMockStore());
+    const props = createProps();
+    const { getByTestId } = renderWithProvider(
+      <ListItemSearch {...props} />,
+      store,
+    );
+    expect(getByTestId('search-list-items')).toBeInTheDocument();
+  });
+
+  it('changes the search query', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps();
+    const { getByTestId } = renderWithProvider(
+      <ListItemSearch {...props} />,
+      store,
+    );
+    const input = getByTestId('search-list-items');
+    fireEvent.change(input, { target: { value: 'USD' } });
+    expect(props.setSearchQuery).toHaveBeenCalledWith('USD');
+    expect(props.onSearch).toHaveBeenCalledWith({
+      searchQuery: 'USD',
+      results: [],
+    });
+  });
+
+  it('imports a token', async () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const props = createProps({ shouldSearchForImports: true });
+    const { getByTestId } = renderWithProvider(
+      <ListItemSearch {...props} />,
+      store,
+    );
+    const input = getByTestId('search-list-items');
+    await fireEvent.change(input, { target: { value: token.address } });
+    expect(props.setSearchQuery).toHaveBeenCalledWith(token.address);
+    expect(props.onSearch).toHaveBeenCalledWith({
+      searchQuery: token.address,
+      results: [token],
+    });
+  });
+});

ui/pages/swaps/select-quote-popover/quote-details/quote-details.test.js

@@ -0,0 +1,33 @@
+import React from 'react';
+import configureMockStore from 'redux-mock-store';
+
+import {
+  renderWithProvider,
+  createSwapsMockStore,
+} from '../../../../../test/jest';
+import quoteDataRows from '../mock-quote-data';
+import QuoteDetails from './quote-details';
+
+const createProps = (customProps = {}) => {
+  return {
+    ...quoteDataRows[0],
+    slippage: 2,
+    liquiditySourceKey: 'swapAggregator',
+    minimumAmountReceived: '2',
+    feeInEth: '0.0003',
+    metaMaskFee: 0.0205,
+    ...customProps,
+  };
+};
+
+describe('ListItemSearch', () => {
+  it('renders the component with initial props', () => {
+    const store = configureMockStore()(createSwapsMockStore());
+    const props = createProps();
+    const { getByText } = renderWithProvider(
+      <QuoteDetails {...props} />,
+      store,
+    );
+    expect(getByText('Rate')).toBeInTheDocument();
+  });
+});

ui/pages/swaps/select-quote-popover/sort-list/__snapshots__/sort-list.test.js.snap

@@ -3,6 +3,7 @@
 exports[`SortList renders the component with initial props 1`] = `
 <div
   class="select-quote-popover__column-header select-quote-popover__receiving"
+  data-testid="select-quote-popover__receiving"
 >
   <span
     class="select-quote-popover__receiving-symbol"
@@ -50,6 +51,7 @@ exports[`SortList renders the component with initial props 1`] = `
 exports[`SortList renders the component with initial props 2`] = `
 <div
   class="select-quote-popover__column-header select-quote-popover__network-fees select-quote-popover__network-fees-header"
+  data-testid="select-quote-popover__network-fees-header"
 >
   <span>
     Estimated network fees
@@ -88,6 +90,7 @@ exports[`SortList renders the component with initial props 2`] = `
 exports[`SortList renders the component with initial props 3`] = `
 <div
   class="select-quote-popover__row select-quote-popover__row--selected"
+  data-testid="select-quote-popover-row-1"
 >
   <div
     class="select-quote-popover__receiving"
@@ -124,6 +127,7 @@ exports[`SortList renders the component with initial props 3`] = `
   </div>
   <div
     class="select-quote-popover__caret-right"
+    data-testid="select-quote-popover__caret-right-1"
   >
     <i
       class="fa fa-angle-up"

ui/pages/swaps/select-quote-popover/sort-list/sort-list.js

@@ -80,6 +80,7 @@ export default function SortList({
       <div className="select-quote-popover__column-headers">
         <div
           className="select-quote-popover__column-header select-quote-popover__receiving"
+          data-testid="select-quote-popover__receiving"
           onClick={() => onColumnHeaderClick('destinationTokenValue')}
         >
           <span className="select-quote-popover__receiving-symbol">
@@ -96,6 +97,7 @@ export default function SortList({
         </div>
         <div
           className="select-quote-popover__column-header select-quote-popover__network-fees select-quote-popover__network-fees-header"
+          data-testid="select-quote-popover__network-fees-header"
           onClick={() => onColumnHeaderClick('rawNetworkFees')}
         >
           {!hideEstimatedGasFee && (
@@ -111,6 +113,7 @@ export default function SortList({
         </div>
         <div
           className="select-quote-popover__column-header select-quote-popover__quote-source"
+          data-testid="select-quote-popover__quote-source"
           onClick={() => onColumnHeaderClick('quoteSource')}
         >
           {t('swapQuoteSource')}
@@ -137,6 +140,7 @@ export default function SortList({
             })}
             onClick={() => onSelect(aggId)}
             key={`select-quote-popover-row-${i}`}
+            data-testid={`select-quote-popover-row-${i}`}
           >
             <div className="select-quote-popover__receiving">
               <div className="select-quote-popover__receiving-value">
@@ -178,6 +182,7 @@ export default function SortList({
             </div>
             <div
               className="select-quote-popover__caret-right"
+              data-testid={`select-quote-popover__caret-right-${i}`}
               onClick={(event) => {
                 event.stopPropagation();
                 onCaretClick(aggId);

ui/pages/swaps/select-quote-popover/sort-list/sort-list.test.js

@@ -1,6 +1,6 @@
 import React from 'react';
 
-import { renderWithProvider } from '../../../../../test/jest';
+import { renderWithProvider, fireEvent } from '../../../../../test/jest';
 import SortList from './sort-list';
 
 jest.mock(
@@ -86,4 +86,32 @@ describe('SortList', () => {
       document.querySelector('.select-quote-popover__row--selected'),
     ).toMatchSnapshot();
   });
+
+  it('clicks on the "destinationTokenValue" header', () => {
+    const props = createProps();
+    const { getByTestId } = renderWithProvider(<SortList {...props} />);
+    fireEvent.click(getByTestId('select-quote-popover__receiving'));
+    expect(props.setSortColumn).toHaveBeenCalledWith('destinationTokenValue');
+  });
+
+  it('clicks on the "rawNetworkFees" header', () => {
+    const props = createProps();
+    const { getByTestId } = renderWithProvider(<SortList {...props} />);
+    fireEvent.click(getByTestId('select-quote-popover__network-fees-header'));
+    expect(props.setSortColumn).toHaveBeenCalledWith('rawNetworkFees');
+  });
+
+  it('clicks on the first aggregator', () => {
+    const props = createProps();
+    const { getByTestId } = renderWithProvider(<SortList {...props} />);
+    fireEvent.click(getByTestId('select-quote-popover-row-0'));
+    expect(props.onSelect).toHaveBeenCalledWith('Agg1');
+  });
+
+  it('clicks on a caret for the first aggregator', () => {
+    const props = createProps();
+    const { getByTestId } = renderWithProvider(<SortList {...props} />);
+    fireEvent.click(getByTestId('select-quote-popover__caret-right-0'));
+    expect(props.onCaretClick).toHaveBeenCalledWith('Agg1');
+  });
 });

ui/pages/swaps/slippage-buttons/__snapshots__/slippage-buttons.test.js.snap

@@ -47,7 +47,7 @@ exports[`SlippageButtons renders the component with initial props 2`] = `
 </div>
 `;
 
-exports[`SlippageButtons renders the component with the smart transaction opt-in button available 1`] = `
+exports[`SlippageButtons renders the component with the smart transaction opt-in button available, opt into STX 1`] = `
 <button
   class="slippage-buttons__header slippage-buttons__header--open"
 >
@@ -62,7 +62,7 @@ exports[`SlippageButtons renders the component with the smart transaction opt-in
 </button>
 `;
 
-exports[`SlippageButtons renders the component with the smart transaction opt-in button available 2`] = `
+exports[`SlippageButtons renders the component with the smart transaction opt-in button available, opt into STX 2`] = `
 <div
   class="button-group slippage-buttons__button-group radio-button-group"
   role="radiogroup"

ui/pages/swaps/slippage-buttons/slippage-buttons.js

@@ -170,6 +170,7 @@ export default function SlippageButtons({
                         )}
                       >
                         <input
+                          data-testid="slippage-buttons__custom-slippage"
                           onChange={(event) => {
                             const { value } = event.target;
                             const isValueNumeric = !isNaN(Number(value));

ui/pages/swaps/slippage-buttons/slippage-buttons.test.js

@@ -1,13 +1,14 @@
 import React from 'react';
 
-import { renderWithProvider } from '../../../../test/jest';
+import { renderWithProvider, fireEvent } from '../../../../test/jest';
+import { SLIPPAGE } from '../../../../shared/constants/swaps';
 import SlippageButtons from '.';
 
 const createProps = (customProps = {}) => {
   return {
     onSelect: jest.fn(),
     maxAllowedSlippage: 15,
-    currentSlippage: 3,
+    currentSlippage: SLIPPAGE.HIGH,
     smartTransactionsEnabled: false,
     ...customProps,
   };
@@ -15,7 +16,7 @@ const createProps = (customProps = {}) => {
 
 describe('SlippageButtons', () => {
   it('renders the component with initial props', () => {
-    const { getByText, queryByText } = renderWithProvider(
+    const { getByText, queryByText, getByTestId } = renderWithProvider(
       <SlippageButtons {...createProps()} />,
     );
     expect(getByText('2%')).toBeInTheDocument();
@@ -29,11 +30,21 @@ describe('SlippageButtons', () => {
       document.querySelector('.slippage-buttons__button-group'),
     ).toMatchSnapshot();
     expect(queryByText('Smart transaction')).not.toBeInTheDocument();
+    expect(getByTestId('button-group__button1')).toHaveAttribute(
+      'aria-checked',
+      'true',
+    );
   });
 
-  it('renders the component with the smart transaction opt-in button available', () => {
+  it('renders the component with the smart transaction opt-in button available, opt into STX', () => {
+    const setSmartTransactionsOptInStatus = jest.fn();
     const { getByText } = renderWithProvider(
-      <SlippageButtons {...createProps({ smartTransactionsEnabled: true })} />,
+      <SlippageButtons
+        {...createProps({
+          smartTransactionsEnabled: true,
+          setSmartTransactionsOptInStatus,
+        })}
+      />,
     );
     expect(getByText('2%')).toBeInTheDocument();
     expect(getByText('3%')).toBeInTheDocument();
@@ -46,5 +57,69 @@ describe('SlippageButtons', () => {
       document.querySelector('.slippage-buttons__button-group'),
     ).toMatchSnapshot();
     expect(getByText('Smart transaction')).toBeInTheDocument();
+    expect(document.querySelector('.toggle-button--off')).toBeInTheDocument();
+    fireEvent.click(document.querySelector('.toggle-button'));
+    expect(setSmartTransactionsOptInStatus).toHaveBeenCalledWith(true, false);
+  });
+
+  it('renders slippage with a custom value', () => {
+    const { getByText } = renderWithProvider(
+      <SlippageButtons {...createProps({ currentSlippage: 2.5 })} />,
+    );
+    expect(getByText('2.5')).toBeInTheDocument();
+  });
+
+  it('renders the default slippage with Advanced options hidden', () => {
+    const { getByText, queryByText } = renderWithProvider(
+      <SlippageButtons
+        {...createProps({ currentSlippage: SLIPPAGE.DEFAULT })}
+      />,
+    );
+    expect(getByText('Advanced options')).toBeInTheDocument();
+    expect(document.querySelector('.fa-angle-down')).toBeInTheDocument();
+    expect(queryByText('2%')).not.toBeInTheDocument();
+  });
+
+  it('opens the Advanced options section and sets a default slippage', () => {
+    const { getByText, getByTestId } = renderWithProvider(
+      <SlippageButtons
+        {...createProps({ currentSlippage: SLIPPAGE.DEFAULT })}
+      />,
+    );
+    fireEvent.click(getByText('Advanced options'));
+    fireEvent.click(getByTestId('button-group__button0'));
+    expect(getByTestId('button-group__button0')).toHaveAttribute(
+      'aria-checked',
+      'true',
+    );
+  });
+
+  it('opens the Advanced options section and sets a high slippage', () => {
+    const { getByText, getByTestId } = renderWithProvider(
+      <SlippageButtons
+        {...createProps({ currentSlippage: SLIPPAGE.DEFAULT })}
+      />,
+    );
+    fireEvent.click(getByText('Advanced options'));
+    fireEvent.click(getByTestId('button-group__button1'));
+    expect(getByTestId('button-group__button1')).toHaveAttribute(
+      'aria-checked',
+      'true',
+    );
+  });
+
+  it('sets a custom slippage value', () => {
+    const { getByTestId } = renderWithProvider(
+      <SlippageButtons {...createProps()} />,
+    );
+    fireEvent.click(getByTestId('button-group__button2'));
+    expect(getByTestId('button-group__button2')).toHaveAttribute(
+      'aria-checked',
+      'true',
+    );
+    const input = getByTestId('slippage-buttons__custom-slippage');
+    fireEvent.change(input, { target: { value: 5 } });
+    fireEvent.click(document);
+    expect(input).toHaveAttribute('value', '5');
   });
 });

ui/pages/swaps/smart-transaction-status/smart-transaction-status.test.js

@@ -6,7 +6,9 @@ import {
   renderWithProvider,
   createSwapsMockStore,
   setBackgroundConnection,
+  fireEvent,
 } from '../../../../test/jest';
+import { CHAIN_IDS } from '../../../../shared/constants/network';
 import SmartTransactionStatus from '.';
 
 const middleware = [thunk];
@@ -15,6 +17,28 @@ setBackgroundConnection({
   setBackgroundSwapRouteState: jest.fn(),
 });
 
+jest.mock('react-router-dom', () => {
+  const original = jest.requireActual('react-router-dom');
+  return {
+    ...original,
+    useHistory: () => ({
+      push: jest.fn(),
+    }),
+  };
+});
+
+jest.mock('../../../ducks/swaps/swaps', () => {
+  const original = jest.requireActual('../../../ducks/swaps/swaps');
+  return {
+    ...original,
+    prepareToLeaveSwaps: jest.fn(() => {
+      return {
+        type: 'MOCK_TYPE',
+      };
+    }),
+  };
+});
+
 describe('SmartTransactionStatus', () => {
   it('renders the component with initial props', () => {
     const store = configureMockStore(middleware)(createSwapsMockStore());
@@ -22,4 +46,109 @@ describe('SmartTransactionStatus', () => {
     expect(getByText('Publicly submitting your Swap...')).toBeInTheDocument();
     expect(getByText('Close')).toBeInTheDocument();
   });
+
+  it('renders the "success" STX status', () => {
+    const mockStore = createSwapsMockStore();
+    const latestSmartTransaction =
+      mockStore.metamask.smartTransactionsState.smartTransactions[
+        CHAIN_IDS.MAINNET
+      ][1];
+    latestSmartTransaction.status = 'success';
+    const store = configureMockStore(middleware)(mockStore);
+    const { getByText } = renderWithProvider(<SmartTransactionStatus />, store);
+    expect(getByText('Swap complete!')).toBeInTheDocument();
+    expect(getByText('Your USDC is now available.')).toBeInTheDocument();
+    expect(getByText('Create a new swap')).toBeInTheDocument();
+    expect(getByText('Close')).toBeInTheDocument();
+  });
+
+  it('renders the "reverted" STX status', () => {
+    const mockStore = createSwapsMockStore();
+    const latestSmartTransaction =
+      mockStore.metamask.smartTransactionsState.smartTransactions[
+        CHAIN_IDS.MAINNET
+      ][1];
+    latestSmartTransaction.status = 'reverted';
+    const store = configureMockStore(middleware)(mockStore);
+    const { getByText } = renderWithProvider(<SmartTransactionStatus />, store);
+    expect(getByText('Swap failed')).toBeInTheDocument();
+    expect(getByText('customer support')).toBeInTheDocument();
+    expect(getByText('Close')).toBeInTheDocument();
+  });
+
+  it('renders the "cancelled_user_cancelled" STX status', () => {
+    const mockStore = createSwapsMockStore();
+    const latestSmartTransaction =
+      mockStore.metamask.smartTransactionsState.smartTransactions[
+        CHAIN_IDS.MAINNET
+      ][1];
+    latestSmartTransaction.status = 'cancelled_user_cancelled';
+    const store = configureMockStore(middleware)(mockStore);
+    const { getByText } = renderWithProvider(<SmartTransactionStatus />, store);
+    expect(getByText('Swap cancelled')).toBeInTheDocument();
+    expect(
+      getByText(
+        'Your transaction has been cancelled and you did not pay any unnecessary gas fees.',
+      ),
+    ).toBeInTheDocument();
+    expect(getByText('Close')).toBeInTheDocument();
+  });
+
+  it('renders the "deadline_missed" STX status', () => {
+    const mockStore = createSwapsMockStore();
+    const latestSmartTransaction =
+      mockStore.metamask.smartTransactionsState.smartTransactions[
+        CHAIN_IDS.MAINNET
+      ][1];
+    latestSmartTransaction.status = 'deadline_missed';
+    const store = configureMockStore(middleware)(mockStore);
+    const { getByText } = renderWithProvider(<SmartTransactionStatus />, store);
+    expect(getByText('Swap would have failed')).toBeInTheDocument();
+    expect(
+      getByText(
+        'Your transaction would have failed and was cancelled to protect you from paying unnecessary gas fees.',
+      ),
+    ).toBeInTheDocument();
+    expect(getByText('Close')).toBeInTheDocument();
+  });
+
+  it('renders the "unknown" STX status', () => {
+    const mockStore = createSwapsMockStore();
+    const latestSmartTransaction =
+      mockStore.metamask.smartTransactionsState.smartTransactions[
+        CHAIN_IDS.MAINNET
+      ][1];
+    latestSmartTransaction.status = 'unknown';
+    const store = configureMockStore(middleware)(mockStore);
+    const { getByText } = renderWithProvider(<SmartTransactionStatus />, store);
+    expect(getByText('Status unknown')).toBeInTheDocument();
+    expect(
+      getByText(
+        'A transaction has been successful but we’re unsure what it is. This may be due to submitting another transaction while this swap was processing.',
+      ),
+    ).toBeInTheDocument();
+    expect(getByText('Close')).toBeInTheDocument();
+  });
+
+  it('cancels a transaction', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const { getByText } = renderWithProvider(<SmartTransactionStatus />, store);
+    expect(getByText('Publicly submitting your Swap...')).toBeInTheDocument();
+    const cancelLink = getByText('Cancel swap for ~0');
+    expect(cancelLink).toBeInTheDocument();
+    fireEvent.click(cancelLink);
+    expect(
+      getByText('Trying to cancel your transaction...'),
+    ).toBeInTheDocument();
+    expect(cancelLink).not.toBeInTheDocument();
+  });
+
+  it('clicks on the Close button', () => {
+    const store = configureMockStore(middleware)(createSwapsMockStore());
+    const { getByText } = renderWithProvider(<SmartTransactionStatus />, store);
+    expect(getByText('Publicly submitting your Swap...')).toBeInTheDocument();
+    const closeButton = getByText('Close');
+    expect(closeButton).toBeInTheDocument();
+    fireEvent.click(closeButton);
+  });
 });

ui/pages/swaps/swaps-footer/swaps-footer.test.js

@@ -1,6 +1,6 @@
 import React from 'react';
 
-import { renderWithProvider } from '../../../../test/jest';
+import { renderWithProvider, fireEvent } from '../../../../test/jest';
 import SwapsFooter from '.';
 
 const createProps = (customProps = {}) => {
@@ -25,4 +25,15 @@ describe('SwapsFooter', () => {
     expect(getByText('Terms of service')).toBeInTheDocument();
     expect(container).toMatchSnapshot();
   });
+
+  it('clicks on a block explorer link', () => {
+    global.platform = { openTab: jest.fn() };
+    const props = createProps();
+    const { getByText } = renderWithProvider(<SwapsFooter {...props} />);
+    expect(getByText(props.submitText)).toBeInTheDocument();
+    fireEvent.click(getByText('Terms of service'));
+    expect(global.platform.openTab).toHaveBeenCalledWith({
+      url: 'https://metamask.io/terms.html',
+    });
+  });
 });

ui/pages/swaps/swaps.util.test.js

@@ -34,6 +34,8 @@ import {
   getSwapsLivenessForNetwork,
   countDecimals,
   showRemainingTimeInMinAndSec,
+  getFeeForSmartTransaction,
+  formatSwapsValueForDisplay,
 } from './swaps.util';
 
 jest.mock('../../../shared/lib/storage-helpers', () => ({
@@ -534,6 +536,10 @@ describe('Swaps Util', () => {
         shouldEnableDirectWrapping(CHAIN_IDS.MAINNET, WETH_CONTRACT_ADDRESS),
       ).toBe(false);
     });
+
+    it('returns false if source and destination tokens are undefined', () => {
+      expect(shouldEnableDirectWrapping(CHAIN_IDS.MAINNET)).toBe(false);
+    });
   });
 
   describe('showRemainingTimeInMinAndSec', () => {
@@ -551,9 +557,48 @@ describe('Swaps Util', () => {
   });
 
   describe('getFeeForSmartTransaction', () => {
-    it('returns estimated for for STX', () => {
-      // TODO: Implement tests for this function.
-      expect(true).toBe(true);
+    it('returns estimated fee for STX', () => {
+      const expected = {
+        feeInUsd: '0.02',
+        feeInFiat: '$0.02',
+        feeInEth: '0.00323 ETH',
+        rawEthFee: '0.00323',
+      };
+      const actual = getFeeForSmartTransaction({
+        chainId: CHAIN_IDS.MAINNET,
+        currentCurrency: 'usd',
+        conversionRate: 5,
+        USDConversionRate: 5,
+        nativeCurrencySymbol: 'ETH',
+        feeInWeiDec: 3225623412028924,
+      });
+      expect(actual).toMatchObject(expected);
+    });
+
+    it('returns estimated fee for STX for JPY currency', () => {
+      const expected = {
+        feeInUsd: '0.02',
+        feeInFiat: '£0.02',
+        feeInEth: '0.00323 ETH',
+        rawEthFee: '0.00323',
+      };
+      const actual = getFeeForSmartTransaction({
+        chainId: CHAIN_IDS.MAINNET,
+        currentCurrency: 'gbp',
+        conversionRate: 5,
+        USDConversionRate: 5,
+        nativeCurrencySymbol: 'ETH',
+        feeInWeiDec: 3225623412028924,
+      });
+      expect(actual).toMatchObject(expected);
+    });
+  });
+
+  describe('formatSwapsValueForDisplay', () => {
+    it('gets swaps value for display', () => {
+      expect(formatSwapsValueForDisplay('39.6493201125465000000')).toBe(
+        '39.6493201125',
+      );
     });
   });
 

ui/pages/swaps/view-on-block-explorer/view-on-block-explorer.test.js

@@ -1,6 +1,6 @@
 import React from 'react';
 
-import { renderWithProvider } from '../../../../test/jest';
+import { renderWithProvider, fireEvent } from '../../../../test/jest';
 import ViewOnBlockExplorer from '.';
 
 const createProps = (customProps = {}) => {
@@ -20,4 +20,17 @@ describe('ViewOnBlockExplorer', () => {
     expect(getByText('View Swap at etherscan.io')).toBeInTheDocument();
     expect(container).toMatchSnapshot();
   });
+
+  it('clicks on the block explorer link', () => {
+    global.platform = { openTab: jest.fn() };
+    const { getByText } = renderWithProvider(
+      <ViewOnBlockExplorer {...createProps()} />,
+    );
+    const link = getByText('View Swap at etherscan.io');
+    expect(link).toBeInTheDocument();
+    fireEvent.click(link);
+    expect(global.platform.openTab).toHaveBeenCalledWith({
+      url: 'https://etherscan.io',
+    });
+  });
 });

ui/pages/swaps/view-quote/__snapshots__/view-quote.test.js.snap

@@ -38,6 +38,7 @@ exports[`ViewQuote renders the component with EIP-1559 enabled 2`] = `
     </span>
     <span
       class=""
+      data-testid="exchange-rate-display__base-symbol"
     >
       DAI
     </span>
@@ -54,6 +55,7 @@ exports[`ViewQuote renders the component with EIP-1559 enabled 2`] = `
     </span>
     <div
       class="exchange-rate-display__switch-arrows"
+      data-testid="exchange-rate-display__switch-arrows"
     >
       <svg
         fill="none"
@@ -110,6 +112,7 @@ exports[`ViewQuote renders the component with initial props 2`] = `
     </span>
     <span
       class=""
+      data-testid="exchange-rate-display__base-symbol"
     >
       DAI
     </span>
@@ -126,6 +129,7 @@ exports[`ViewQuote renders the component with initial props 2`] = `
     </span>
     <div
       class="exchange-rate-display__switch-arrows"
+      data-testid="exchange-rate-display__switch-arrows"
     >
       <svg
         fill="none"

ui/pages/swaps/view-quote/view-quote.js

@@ -659,6 +659,7 @@ export default function ViewQuote() {
 
   const metaMaskFee = usedQuote.fee;
 
+  /* istanbul ignore next */
   const onFeeCardTokenApprovalClick = () => {
     trackEditSpendLimitOpened();
     dispatch(
@@ -891,7 +892,9 @@ export default function ViewQuote() {
           'view-quote__content_modal': disableSubmissionDueToPriceWarning,
         })}
       >
-        {selectQuotePopoverShown && (
+        {
+          /* istanbul ignore next */
+          selectQuotePopoverShown && (
             <SelectQuotePopover
               quoteDataRows={renderablePopoverData}
               onClose={() => setSelectQuotePopoverShown(false)}
@@ -903,7 +906,8 @@ export default function ViewQuote() {
                 smartTransactionsEnabled && smartTransactionsOptInStatus
               }
             />
-        )}
+          )
+        }
 
         <div
           className={classnames('view-quote__warning-wrapper', {
@@ -914,7 +918,10 @@ export default function ViewQuote() {
           {(showInsufficientWarning || tokenBalanceUnavailable) && (
             <ActionableMessage
               message={actionableBalanceErrorMessage}
-              onClose={() => setWarningHidden(true)}
+              onClose={
+                /* istanbul ignore next */
+                () => setWarningHidden(true)
+              }
             />
           )}
         </div>
@@ -971,10 +978,13 @@ export default function ViewQuote() {
               onTokenApprovalClick={onFeeCardTokenApprovalClick}
               metaMaskFee={String(metaMaskFee)}
               numberOfQuotes={Object.values(quotes).length}
-              onQuotesClick={() => {
+              onQuotesClick={
+                /* istanbul ignore next */
+                () => {
                   trackAllAvailableQuotesOpened();
                   setSelectQuotePopoverShown(true);
-              }}
+                }
+              }
               chainId={chainId}
               isBestQuote={isBestQuote}
               maxPriorityFeePerGasDecGWEI={hexWEIToDecGWEI(
@@ -986,7 +996,8 @@ export default function ViewQuote() {
         )}
       </div>
       <SwapsFooter
-        onSubmit={() => {
+        onSubmit={
+          /* istanbul ignore next */ () => {
             setSubmitClicked(true);
             if (!balanceError) {
               if (
@@ -1016,7 +1027,8 @@ export default function ViewQuote() {
             } else {
               history.push(`${ASSET_ROUTE}/${destinationToken.address}`);
             }
-        }}
+          }
+        }
         submitText={
           currentSmartTransactionsEnabled &&
           smartTransactionsOptInStatus &&