first commit

test/unit/.eslintrc

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+{
+  "env": { 
+    "jest": true
+  },
+  "globals": { 
+  }
+}

test/unit/jest.conf.js

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+const path = require('path')
+
+module.exports = {
+  rootDir: path.resolve(__dirname, '../../'),
+  moduleFileExtensions: [
+    'js',
+    'json',
+    'vue'
+  ],
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1'
+  },
+  transform: {
+    '^.+\\.js$': '<rootDir>/node_modules/babel-jest',
+    '.*\\.(vue)$': '<rootDir>/node_modules/vue-jest'
+  },
+  testPathIgnorePatterns: [
+    '<rootDir>/test/e2e'
+  ],
+  snapshotSerializers: ['<rootDir>/node_modules/jest-serializer-vue'],
+  setupFiles: ['<rootDir>/test/unit/setup'],
+  mapCoverage: true,
+  coverageDirectory: '<rootDir>/test/unit/coverage',
+  collectCoverageFrom: [
+    'src/**/*.{js,vue}',
+    '!src/main.js',
+    '!src/router/index.js',
+    '!**/node_modules/**'
+  ]
+}

test/unit/setup.js

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+import Vue from 'vue'
+
+Vue.config.productionTip = false

test/unit/specs/HelloWorld.spec.js

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+import Vue from 'vue'
+import HelloWorld from '@/components/HelloWorld'
+
+describe('HelloWorld.vue', () => {
+  it('should render correct contents', () => {
+    const Constructor = Vue.extend(HelloWorld)
+    const vm = new Constructor().$mount()
+    expect(vm.$el.querySelector('.hello h1').textContent)
+      .toEqual('Welcome to Your Vue.js App')
+  })
+})