A Metamask fork with Infura removed and default networks editable
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ciphermask/ui/hooks/useCurrencyDisplay.test.js

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import { renderHook } from '@testing-library/react-hooks';
import * as reactRedux from 'react-redux';
import sinon from 'sinon';
import { getCurrentCurrency } from '../selectors';
import {
getConversionRate,
getNativeCurrency,
} from '../ducks/metamask/metamask';
import { useCurrencyDisplay } from './useCurrencyDisplay';
const tests = [
{
input: {
value: '0x2386f26fc10000',
numberOfDecimals: 2,
currency: 'usd',
},
result: {
value: '$2.80',
suffix: 'USD',
displayValue: '$2.80 USD',
},
},
{
input: {
value: '0x2386f26fc10000',
currency: 'usd',
},
result: {
value: '$2.80',
suffix: 'USD',
displayValue: '$2.80 USD',
},
},
{
input: {
value: '0x1193461d01595930',
currency: 'ETH',
numberOfDecimals: 3,
},
result: {
value: '1.266',
suffix: 'ETH',
displayValue: '1.266 ETH',
},
},
{
input: {
value: '0x1193461d01595930',
currency: 'ETH',
numberOfDecimals: 3,
hideLabel: true,
},
result: {
value: '1.266',
suffix: undefined,
displayValue: '1.266',
},
},
{
input: {
value: '0x3b9aca00',
currency: 'ETH',
denomination: 'GWEI',
hideLabel: true,
},
result: {
value: '1',
suffix: undefined,
displayValue: '1',
},
},
{
input: {
value: '0x3b9aca00',
currency: 'ETH',
denomination: 'WEI',
hideLabel: true,
},
result: {
value: '1000000000',
suffix: undefined,
displayValue: '1000000000',
},
},
{
input: {
value: '0x3b9aca00',
currency: 'ETH',
numberOfDecimals: 100,
hideLabel: true,
},
result: {
value: '0.000000001',
suffix: undefined,
displayValue: '0.000000001',
},
},
];
describe('useCurrencyDisplay', () => {
tests.forEach(({ input: { value, ...restProps }, result }) => {
describe(`when input is { value: ${value}, decimals: ${restProps.numberOfDecimals}, denomation: ${restProps.denomination} }`, () => {
const stub = sinon.stub(reactRedux, 'useSelector');
stub.callsFake((selector) => {
if (selector === getCurrentCurrency) {
return 'usd';
} else if (selector === getNativeCurrency) {
return 'ETH';
} else if (selector === getConversionRate) {
return 280.45;
}
return undefined;
});
const hookReturn = renderHook(() => useCurrencyDisplay(value, restProps));
const [displayValue, parts] = hookReturn.result.current;
stub.restore();
it(`should return ${result.displayValue} as displayValue`, () => {
expect(displayValue).toStrictEqual(result.displayValue);
});
it(`should return ${result.value} as value`, () => {
expect(parts.value).toStrictEqual(result.value);
});
it(`should return ${result.suffix} as suffix`, () => {
expect(parts.suffix).toStrictEqual(result.suffix);
});
});
});
});