Cypress (#734)

* Add some basic integration tests and CI in GitHub

* Add push trigger

* Add badge for tests to readme

* Unit tests

* Just use the development infura URL in the tests

* Remove unused webpack config

* Make integration test run on the same port as yarn start

* make test a little bit better

* rename describe

.env

+REACT_APP_CHAIN_ID="1"
+REACT_APP_NETWORK_URL="https://mainnet.infura.io/v3/b8800ce81b8c451698081d269b86692b"
+REACT_APP_PORTIS_ID=""
+REACT_APP_FORTMATIC_KEY=""
\ No newline at end of file

.github/workflows/tests.yaml

+name: Tests
+on:
+  push:
+    branches:
+      - v2
+  pull_request:
+    branches:
+      - v2
+jobs:
+  integration-tests:
+    name: Integration tests
+    runs-on: ubuntu-16.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '12'
+      - run: yarn
+      - run: yarn integration-test
+
+  unit-tests:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '12'
+      - run: yarn
+      - run: yarn test
+
+# todo: add job for typescript linting

.gitignore

@@ -11,7 +11,6 @@
 
 # misc
 .DS_Store
-.env
 .env.local
 .env.development.local
 .env.test.local
@@ -28,4 +27,7 @@ notes.txt
 
 .vscode/
 
-package-lock.json
+package-lock.json
\ No newline at end of file
+
+cypress/videos
+cypress/screenshots
\ No newline at end of file

.travis.yml

-branches:
-  except:
-    - master
-language: node_js
-node_js:
-  - '10'
-cache:
-  directories:
-    - node_modules
-install: yarn
-script:
-  - yarn check:all
-  - yarn build

README.md

 # Uniswap Frontend
 
 [![Netlify Status](https://api.netlify.com/api/v1/badges/fa110555-b3c7-4eeb-b840-88a835009c62/deploy-status)](https://app.netlify.com/sites/uniswap/deploys)
-[![Build Status](https://travis-ci.org/Uniswap/uniswap-frontend.svg)](https://travis-ci.org/Uniswap/uniswap-frontend)
+[![Tests](https://github.com/Uniswap/uniswap-frontend/workflows/Tests/badge.svg?branch=v2)](https://github.com/Uniswap/uniswap-frontend/actions?query=workflow%3ATests)
 [![Styled With Prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://prettier.io/)
 
 This an an open source interface for Uniswap - a protocol for decentralized exchange of Ethereum tokens.

cypress.json

+{
+  "baseUrl": "http://localhost:3000"
+}

cypress/integration/no-connect.ts

+describe('Homepage', () => {
+  beforeEach(() => cy.visit('/'))
+  it('loads exchange page', () => {
+    cy.get('#exchangePage')
+  })
+
+  it('has url /swap', () => {
+    cy.url().should('include', '/swap')
+  })
+
+  it('can enter an amount into input', () => {
+    cy.get('#swapInputField').type('0.001')
+  })
+
+  it('can enter an amount into output', () => {
+    cy.get('#swapOutputField').type('0.001')
+  })
+})
\ No newline at end of file

cypress/plugins/index.js

+/// <reference types="cypress" />
+// ***********************************************************
+// This example plugins/index.js can be used to load plugins
+//
+// You can change the location of this file or turn off loading
+// the plugins file with the 'pluginsFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/plugins-guide
+// ***********************************************************
+
+// This function is called when a project is opened or re-opened (e.g. due to
+// the project's config changing)
+
+/**
+ * @type {Cypress.PluginConfig}
+ */
+module.exports = (on, config) => {
+  // `on` is used to hook into various events Cypress emits
+  // `config` is the resolved Cypress config
+}

cypress/support/commands.ts

+// ***********************************************
+// This example commands.js shows you how to
+// create various custom commands and overwrite
+// existing commands.
+//
+// For more comprehensive examples of custom
+// commands please read more here:
+// https://on.cypress.io/custom-commands
+// ***********************************************
+//
+//
+// -- This is a parent command --
+// Cypress.Commands.add("login", (email, password) => { ... })
+//
+//
+// -- This is a child command --
+// Cypress.Commands.add("drag", { prevSubject: 'element'}, (subject, options) => { ... })
+//
+//
+// -- This is a dual command --
+// Cypress.Commands.add("dismiss", { prevSubject: 'optional'}, (subject, options) => { ... })
+//
+//
+// -- This will overwrite an existing command --
+// Cypress.Commands.overwrite("visit", (originalFn, url, options) => { ... })
+
+// TODO(moodysalem): commands for connecting a mock ethereum provider.
\ No newline at end of file

cypress/support/index.ts

+// ***********************************************************
+// This example support/index.ts is processed and
+// loaded automatically before your test files.
+//
+// This is a great place to put global configuration and
+// behavior that modifies Cypress.
+//
+// You can change the location of this file or turn off
+// automatically serving support files with the
+// 'supportFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/configuration
+// ***********************************************************
+
+// Import commands.ts using ES2015 syntax:
+import './commands'
+
+// Alternatively you can use CommonJS syntax:
+// require('./commands')

cypress/tsconfig.json

+{
+  "compilerOptions": {
+    "strict": true,
+    "baseUrl": "../node_modules",
+    "target": "es5",
+    "lib": [
+      "es5",
+      "dom"
+    ],
+    "types": [
+      "cypress"
+    ]
+  },
+  "include": [
+    "**/*.ts"
+  ]
+}
\ No newline at end of file

package.json

@@ -56,7 +56,10 @@
     "@types/react": "^16.9.34",
     "@types/react-dom": "^16.9.7",
     "@types/styled-components": "^4.2.0",
+    "cypress": "^4.5.0",
     "prettier": "^1.17.0",
+    "serve": "^11.3.0",
+    "start-server-and-test": "^1.11.0",
     "typescript": "^3.8.3"
   },
   "scripts": {
@@ -71,7 +74,10 @@
     "fix:all": "yarn fix:lint && yarn fix:format",
     "check:lint": "yarn lint:base",
     "check:format": "yarn format:base --check",
-    "check:all": "yarn check:lint && yarn check:format"
+    "check:all": "yarn check:lint && yarn check:format",
+    "cy:run": "cypress run",
+    "serve:build": "serve -s build -l 3000",
+    "integration-test": "yarn build && start-server-and-test 'yarn run serve:build' http://localhost:3000 cy:run"
   },
   "eslintConfig": {
     "extends": "react-app"

src/components/CurrencyInputPanel/index.js

@@ -151,7 +151,8 @@ export default function CurrencyInputPanel({
   hideInput = false,
   showSendWithSwap = false,
   otherSelectedTokenAddress = null,
-  advanced = false
+  advanced = false,
+  inputId,
 }) {
   const { t } = useTranslation()
 
@@ -195,6 +196,7 @@ export default function CurrencyInputPanel({
             <>
               <NumericalInput
                 value={value}
+                id={inputId}
                 onUserInput={val => {
                   onUserInput(field, val)
                 }}

src/components/ExchangePage/index.tsx

@@ -940,7 +940,7 @@ function ExchangePage({ sendingInput = false, history, params }) {
   }
 
   return (
-    <Wrapper>
+    <Wrapper id="exchangePage">
       <ConfirmationModal
         isOpen={showConfirm}
         title={sendingWithSwap ? 'Confirm swap and send' : sending ? 'Confirm Send' : 'Confirm Swap'}
@@ -985,6 +985,7 @@ function ExchangePage({ sendingInput = false, history, params }) {
               showSendWithSwap={true}
               advanced={advanced}
               label={''}
+              inputId="swapInputField"
               otherSelectedTokenAddress={tokens[Field.OUTPUT]?.address}
             />
           </InputGroup>
@@ -1008,6 +1009,7 @@ function ExchangePage({ sendingInput = false, history, params }) {
               }}
               onTokenSelection={address => onTokenSelection(Field.INPUT, address)}
               otherSelectedTokenAddress={tokens[Field.OUTPUT]?.address}
+              inputId="swapInputField"
             />
             {sendingWithSwap ? (
               <ColumnCenter>
@@ -1048,6 +1050,7 @@ function ExchangePage({ sendingInput = false, history, params }) {
               pair={pair}
               advanced={advanced}
               otherSelectedTokenAddress={tokens[Field.INPUT]?.address}
+              inputId="swapOutputField"
             />
             {sendingWithSwap && (
               <RowBetween padding="0 12px">

src/pages/Pool/AddLiquidity.tsx

@@ -722,6 +722,7 @@ function AddLiquidity({ token0, token1, step = false }) {
           error={inputError}
           pair={pair}
           label="Input"
+          inputId="addLiquidityInput"
         />
         <ColumnCenter>
           <Plus size="16" color="#888D9B" />
@@ -738,6 +739,7 @@ function AddLiquidity({ token0, token1, step = false }) {
           onTokenSelection={address => onTokenSelection(Field.OUTPUT, address)}
           error={outputError}
           pair={pair}
+          inputId="addLiquidityOutput"
         />
         {tokens[Field.OUTPUT] && tokens[Field.INPUT] && (
           <LightCard padding="1rem" borderRadius={'20px'}>

src/pages/Pool/RemoveLiquidity.tsx

@@ -704,6 +704,7 @@ export default function RemoveLiquidity({ token0, token1 }) {
               token={pair?.liquidityToken}
               isExchange={true}
               pair={pair}
+              inputId="liquidityAmount"
             />
             <ColumnCenter>
               <ArrowDown size="16" color="#888D9B"/>
@@ -718,6 +719,7 @@ export default function RemoveLiquidity({ token0, token1 }) {
               error={inputError}
               label={'Output'}
               disableTokenSelect
+              inputId="removeLiquidityToken0"
             />
             <ColumnCenter>
               <Plus size="16" color="#888D9B"/>
@@ -732,6 +734,7 @@ export default function RemoveLiquidity({ token0, token1 }) {
               error={outputError}
               label={'Output'}
               disableTokenSelect
+              inputId="removeLiquidityToken1"
             />
           </>
         )}

src/utils/index.test.ts

+import { getEtherscanLink } from './index'
+
+describe('utils', () => {
+  describe('#getEtherscanLink', () => {
+    it('correct for tx', () => {
+      expect(getEtherscanLink(1, 'abc', 'transaction')).toEqual('https://etherscan.io/tx/abc')
+    })
+    it('correct for address', () => {
+      expect(getEtherscanLink(1, 'abc', 'address')).toEqual('https://etherscan.io/address/abc')
+    })
+  })
+})
\ No newline at end of file

src/utils/index.ts

@@ -34,7 +34,7 @@ const ETHERSCAN_PREFIXES = {
   42: 'kovan.'
 }
 
-export function getEtherscanLink(networkId, data, type) {
+export function getEtherscanLink(networkId: 1 | 3 | 4 | 5 | 42 | any, data: string, type: 'transaction' | 'address') {
   const prefix = `https://${ETHERSCAN_PREFIXES[networkId] || ETHERSCAN_PREFIXES[1]}etherscan.io`
 
   switch (type) {

tsconfig.json

@@ -21,7 +21,8 @@
     "allowSyntheticDefaultImports": true
   },
   "exclude": [
-    "node_modules"
+    "node_modules",
+    "cypress"
   ],
   "include": [
     "**/*.js",

webpack.config

-module.exports = {
-  entry: [
-    path.join(process.cwd(), 'app/app.tsx'), // or whatever the path of your root file is
-  ]
-  module: {
-    rules:[{ test: /\.tsx?$/, loader: 'awesome-typescript-loader' }], // other loader configuration goes in the array
-    resolve: {extensions: ['.js', '.jsx', '.react.js', '.ts', '.tsx']} 
-  }
-}
\ No newline at end of file