build: migrate tests to jest (vuejs#1738)

* build: migrate tests to jest

* build: remove babel object-rest-spread plugin

* chore: rename `.eslintrc` to `.eslintrc.json`

* chore: update `.eslintrc` in the test folder too

.babelrc

@@ -1,4 +1,3 @@
 {
-  "presets": ["env"],
-  "plugins": ["transform-object-rest-spread"]
+  "presets": ["@babel/preset-env"]
 }

.gitignore

@@ -1,3 +1,4 @@
+/coverage
 /docs/.vuepress/dist
 /examples/**/build.js
 /test/e2e/reports

examples/chat/app.js

@@ -1,4 +1,3 @@
-import 'babel-polyfill'
 import Vue from 'vue'
 import App from './components/App.vue'
 import store from './store'

examples/counter/app.js

@@ -1,4 +1,3 @@
-import 'babel-polyfill'
 import Vue from 'vue'
 import Counter from './Counter.vue'
 import store from './store'

examples/shopping-cart/app.js

@@ -1,4 +1,3 @@
-import 'babel-polyfill'
 import Vue from 'vue'
 import App from './components/App.vue'
 import store from './store'

examples/todomvc/app.js

@@ -1,4 +1,3 @@
-import 'babel-polyfill'
 import Vue from 'vue'
 import store from './store'
 import App from './components/App.vue'

jest.config.js

@@ -0,0 +1,24 @@
+module.exports = {
+  rootDir: __dirname,
+  globals: {
+    __DEV__: true
+  },
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1',
+    '^test/(.*)$': '<rootDir>/test/$1'
+  },
+  testMatch: ['<rootDir>/test/unit/**/*.spec.js'],
+  testPathIgnorePatterns: ['/node_modules/'],
+  setupFilesAfterEnv: [
+    './test/setup.js'
+  ],
+  "transform": {
+    "^.+\\.js$": "<rootDir>/node_modules/babel-jest"
+  },
+  coverageDirectory: 'coverage',
+  coverageReporters: ['json', 'lcov', 'text-summary', 'clover'],
+  collectCoverageFrom: [
+    'src/**/*.js',
+    '!src/index.cjs.js'
+  ]
+}

package.json

@@ -21,10 +21,11 @@
     "build:logger": "node scripts/build-logger.js",
     "lint": "eslint src test",
     "test": "npm run lint && npm run test:types && npm run test:unit && npm run test:ssr && npm run test:e2e",
-    "test:unit": "jasmine JASMINE_CONFIG_PATH=test/unit/jasmine.json",
+    "test:unit": "jest --testPathIgnorePatterns test/e2e",
     "test:e2e": "node test/e2e/runner.js",
-    "test:ssr": "cross-env VUE_ENV=server jasmine JASMINE_CONFIG_PATH=test/unit/jasmine.json",
+    "test:ssr": "cross-env VUE_ENV=server jest --testPathIgnorePatterns test/e2e",
     "test:types": "tsc -p types/test",
+    "coverage": "jest --testPathIgnorePatterns test/e2e --coverage",
     "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s",
     "release": "node scripts/release.js",
     "docs": "vuepress dev docs",
@@ -44,16 +45,15 @@
     "vue": "^2.0.0"
   },
   "devDependencies": {
+    "@babel/core": "^7.9.0",
+    "@babel/preset-env": "^7.9.5",
     "@rollup/plugin-buble": "^0.21.3",
     "@rollup/plugin-commonjs": "^11.1.0",
     "@rollup/plugin-node-resolve": "^7.1.3",
     "@rollup/plugin-replace": "^2.3.2",
     "@types/node": "^13.13.2",
-    "babel-core": "^6.22.1",
-    "babel-loader": "^7.1.2",
-    "babel-plugin-transform-object-rest-spread": "^6.23.0",
-    "babel-polyfill": "^6.22.0",
-    "babel-preset-env": "^1.5.1",
+    "babel-jest": "^25.4.0",
+    "babel-loader": "^8.1.0",
     "brotli": "^1.3.2",
     "chalk": "^4.0.0",
     "chromedriver": "^80.0.1",
@@ -66,10 +66,10 @@
     "eslint-plugin-vue-libs": "^4.0.0",
     "execa": "^4.0.0",
     "express": "^4.17.1",
-    "jasmine": "2.8.0",
-    "jasmine-core": "2.8.0",
+    "jest": "^25.4.0",
     "nightwatch": "^1.3.1",
     "nightwatch-helpers": "^1.2.0",
+    "regenerator-runtime": "^0.13.5",
     "rollup": "^2.7.2",
     "rollup-plugin-terser": "^5.3.0",
     "semver": "^7.3.2",

test/.eslintrc.json

@@ -0,0 +1,5 @@
+{
+  "env": {
+    "jest": true
+  }
+}

test/setup.js

@@ -0,0 +1,5 @@
+import 'regenerator-runtime/runtime'
+import Vue from 'vue'
+import Vuex from '@/index'
+
+Vue.use(Vuex)

test/unit/helpers.spec.js

@@ -95,7 +95,7 @@ describe('Helpers', () => {
   })
 
   it('mapState (with undefined states)', () => {
-    spyOn(console, 'error')
+    jest.spyOn(console, 'error').mockImplementation()
     const store = new Vuex.Store({
       modules: {
         foo: {
@@ -225,7 +225,7 @@ describe('Helpers', () => {
   })
 
   it('mapMutations (with undefined mutations)', () => {
-    spyOn(console, 'error')
+    jest.spyOn(console, 'error').mockImplementation()
     const store = new Vuex.Store({
       modules: {
         foo: {
@@ -393,7 +393,7 @@ describe('Helpers', () => {
   })
 
   it('mapGetters (with undefined getters)', () => {
-    spyOn(console, 'error')
+    jest.spyOn(console, 'error').mockImplementation()
     const store = new Vuex.Store({
       modules: {
         foo: {
@@ -420,8 +420,8 @@ describe('Helpers', () => {
   })
 
   it('mapActions (array)', () => {
-    const a = jasmine.createSpy()
-    const b = jasmine.createSpy()
+    const a = jest.fn()
+    const b = jest.fn()
     const store = new Vuex.Store({
       actions: {
         a,
@@ -440,8 +440,8 @@ describe('Helpers', () => {
   })
 
   it('mapActions (object)', () => {
-    const a = jasmine.createSpy()
-    const b = jasmine.createSpy()
+    const a = jest.fn()
+    const b = jest.fn()
     const store = new Vuex.Store({
       actions: {
         a,
@@ -463,7 +463,7 @@ describe('Helpers', () => {
   })
 
   it('mapActions (function)', () => {
-    const a = jasmine.createSpy()
+    const a = jest.fn()
     const store = new Vuex.Store({
       actions: { a }
     })
@@ -476,12 +476,12 @@ describe('Helpers', () => {
       })
     })
     vm.foo('foo')
-    expect(a.calls.argsFor(0)[1]).toBe('foobar')
+    expect(a.mock.calls[0][1]).toBe('foobar')
   })
 
   it('mapActions (with namespace)', () => {
-    const a = jasmine.createSpy()
-    const b = jasmine.createSpy()
+    const a = jest.fn()
+    const b = jest.fn()
     const store = new Vuex.Store({
       modules: {
         foo: {
@@ -508,7 +508,7 @@ describe('Helpers', () => {
   })
 
   it('mapActions (function with namespace)', () => {
-    const a = jasmine.createSpy()
+    const a = jest.fn()
     const store = new Vuex.Store({
       modules: {
         foo: {
@@ -526,12 +526,12 @@ describe('Helpers', () => {
       })
     })
     vm.foo('foo')
-    expect(a.calls.argsFor(0)[1]).toBe('foobar')
+    expect(a.mock.calls[0][1]).toBe('foobar')
   })
 
   it('mapActions (with undefined actions)', () => {
-    spyOn(console, 'error')
-    const a = jasmine.createSpy()
+    jest.spyOn(console, 'error').mockImplementation()
+    const a = jest.fn()
     const store = new Vuex.Store({
       modules: {
         foo: {
@@ -552,8 +552,8 @@ describe('Helpers', () => {
   })
 
   it('createNamespacedHelpers', () => {
-    const actionA = jasmine.createSpy()
-    const actionB = jasmine.createSpy()
+    const actionA = jest.fn()
+    const actionB = jest.fn()
     const store = new Vuex.Store({
       modules: {
         foo: {

test/unit/hot-reload.spec.js

@@ -251,7 +251,7 @@ describe('Hot Reload', () => {
       }
     })
 
-    const spy = jasmine.createSpy()
+    const spy = jest.fn()
     const vm = new Vue({
       computed: {
         a: () => store.getters.count
@@ -292,7 +292,7 @@ describe('Hot Reload', () => {
   it('provide warning if a new module is given', () => {
     const store = new Vuex.Store({})
 
-    spyOn(console, 'warn')
+    jest.spyOn(console, 'warn').mockImplementation()
 
     store.hotUpdate({
       modules: {
@@ -312,10 +312,10 @@ describe('Hot Reload', () => {
 
   it('update namespace', () => {
     // prevent to print notification of unknown action/mutation
-    spyOn(console, 'error')
+    jest.spyOn(console, 'error').mockImplementation()
 
-    const actionSpy = jasmine.createSpy()
-    const mutationSpy = jasmine.createSpy()
+    const actionSpy = jest.fn()
+    const mutationSpy = jest.fn()
 
     const store = new Vuex.Store({
       modules: {
@@ -332,9 +332,9 @@ describe('Hot Reload', () => {
     expect(store.state.a.value).toBe(1)
     expect(store.getters['a/foo']).toBe(1)
     store.dispatch('a/foo')
-    expect(actionSpy.calls.count()).toBe(1)
+    expect(actionSpy).toHaveBeenCalledTimes(1)
     store.commit('a/foo')
-    expect(actionSpy.calls.count()).toBe(1)
+    expect(actionSpy).toHaveBeenCalledTimes(1)
 
     store.hotUpdate({
       modules: {
@@ -350,18 +350,18 @@ describe('Hot Reload', () => {
 
     // should not be called
     store.dispatch('a/foo')
-    expect(actionSpy.calls.count()).toBe(1)
+    expect(actionSpy).toHaveBeenCalledTimes(1)
 
     // should be called
     store.dispatch('foo')
-    expect(actionSpy.calls.count()).toBe(2)
+    expect(actionSpy).toHaveBeenCalledTimes(2)
 
     // should not be called
     store.commit('a/foo')
-    expect(mutationSpy.calls.count()).toBe(1)
+    expect(mutationSpy).toHaveBeenCalledTimes(1)
 
     // should be called
     store.commit('foo')
-    expect(mutationSpy.calls.count()).toBe(2)
+    expect(mutationSpy).toHaveBeenCalledTimes(2)
   })
 })

test/unit/module/module-collection.spec.js

@@ -1,4 +1,4 @@
-import ModuleCollection from '../../../src/module/module-collection'
+import ModuleCollection from '@/module/module-collection'
 
 describe('ModuleCollection', () => {
   it('get', () => {

test/unit/module/module.spec.js

@@ -1,4 +1,4 @@
-import Module from '../../../src/module/module'
+import Module from '@/module/module'
 
 describe('Module', () => {
   it('get state', () => {