implemented improvements to RPC history

app/scripts/controllers/preferences.js

@@ -338,7 +338,7 @@ class PreferencesController {
     if (_url !== 'http://localhost:8545') {
       rpcList.push(_url)
     }
-    if (rpcList.length > 2) {
+    if (rpcList.length > 3) {
       rpcList.shift()
     }
     return Promise.resolve(rpcList)

test/e2e/beta/metamask-beta-ui.spec.js

@@ -1011,4 +1011,64 @@ describe('MetaMask', function () {
       await delay(regularDelayMs)
     })
   })
+
+  describe('Stores custom RPC history', () => {
+    const customRpcUrls = [
+      'https://mainnet.infura.io/1',
+      'https://mainnet.infura.io/2',
+      'https://mainnet.infura.io/3',
+      'https://mainnet.infura.io/4',
+    ]
+
+    customRpcUrls.forEach(customRpcUrl => {
+      it('creates custom RPC: ' + customRpcUrl, async () => {
+        const networkDropdown = await findElement(driver, By.css('.network-name'))
+        await networkDropdown.click()
+        await delay(regularDelayMs)
+
+        const customRpcButton = await findElement(driver, By.xpath(`//span[contains(text(), 'Custom RPC')]`))
+        await customRpcButton.click()
+        await delay(regularDelayMs)
+
+        const customRpcInput = await findElement(driver, By.css('input[placeholder="New RPC URL"]'))
+        await customRpcInput.clear()
+        await customRpcInput.sendKeys(customRpcUrl)
+
+        const customRpcSave = await findElement(driver, By.css('.settings__rpc-save-button'))
+        await customRpcSave.click()
+        await delay(largeDelayMs * 2)
+      })
+    })
+
+    it('selects another provider', async () => {
+      const networkDropdown = await findElement(driver, By.css('.network-name'))
+      await networkDropdown.click()
+      await delay(regularDelayMs)
+
+      const customRpcButton = await findElement(driver, By.xpath(`//span[contains(text(), 'Main Ethereum Network')]`))
+      await customRpcButton.click()
+      await delay(largeDelayMs * 2)
+    })
+
+    it('finds 3 recent RPCs in history', async () => {
+      const networkDropdown = await findElement(driver, By.css('.network-name'))
+      await networkDropdown.click()
+      await delay(regularDelayMs)
+
+      // oldest selected RPC is not found
+      await assertElementNotPresent(webdriver, driver, By.xpath(`//span[contains(text(), '${customRpcUrls[0]}')]`))
+
+      // only recent 3 are found and in correct order (most recent at the top)
+      const customRpcs = await findElements(driver, By.xpath(`//span[contains(text(), 'https://mainnet.infura.io/')]`))
+
+      assert.equal(customRpcs.length, 3)
+
+      for (let i = 0; i < customRpcs.length; i++) {
+        const linkText = await customRpcs[i].getText()
+        const rpcUrl = customRpcUrls[customRpcUrls.length - i - 1]
+
+        assert.notEqual(linkText.indexOf(rpcUrl), -1)
+      }
+    })
+  })
 })

ui/app/components/dropdowns/network-dropdown.js

@@ -275,7 +275,9 @@ NetworkDropdown.prototype.renderCommonRpc = function (rpcList, provider) {
   const rpcTarget = provider.rpcTarget
 
   return rpcList.map((rpc) => {
-    if ((rpc === 'http://localhost:8545') || (rpc === rpcTarget)) {
+    const currentRpcTarget = provider.type === 'rpc' && rpc === rpcTarget
+
+    if ((rpc === 'http://localhost:8545') || currentRpcTarget) {
       return null
     } else {
       return h(
@@ -291,17 +293,17 @@ NetworkDropdown.prototype.renderCommonRpc = function (rpcList, provider) {
           },
         },
         [
-          rpcTarget === rpc ? h('i.fa.fa-check') : h('.network-check__transparent', '✓'),
+          currentRpcTarget ? h('i.fa.fa-check') : h('.network-check__transparent', '✓'),
           h('i.fa.fa-question-circle.fa-med.menu-icon-circle'),
           h('span.network-name-item', {
             style: {
-              color: rpcTarget === rpc ? '#ffffff' : '#9b9b9b',
+              color: currentRpcTarget ? '#ffffff' : '#9b9b9b',
             },
           }, rpc),
         ]
       )
     }
-  })
+  }).reverse()
 }
 
 NetworkDropdown.prototype.renderCustomOption = function (provider) {