chore(testing) added unit testing support via jest

Author: trajano

Diff for: .babelrc

@@ -0,0 +1,18 @@
+{
+  "presets": [
+    ["env", {
+      "modules": false,
+      "targets": {
+        "browsers": ["> 1%", "last 2 versions", "not ie <= 8"]
+      }
+    }],
+    "stage-2"
+  ],
+  "plugins": ["transform-vue-jsx", "transform-runtime"],
+  "env": {
+    "test": {
+      "presets": ["env", "stage-2"],
+      "plugins": ["transform-vue-jsx", "istanbul"]
+    }
+  }
+}

Diff for: .editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true

Diff for: .eslintignore

@@ -0,0 +1,5 @@
+/build/
+/config/
+/dist/
+/*.js
+/test/unit/coverage/

Diff for: .eslintrc.js

@@ -0,0 +1,26 @@
+// https://eslint.org/docs/user-guide/configuring
+
+module.exports = {
+  root: true,
+  parser: 'babel-eslint',
+  parserOptions: {
+    sourceType: 'module'
+  },
+  env: {
+    browser: true,
+  },
+  // https://github.com/standard/standard/blob/master/docs/RULES-en.md
+  extends: 'standard',
+  // required to lint *.vue files
+  plugins: [
+    'html'
+  ],
+  // add your custom rules here
+  rules: {
+    // allow async-await
+    'generator-star-spacing': 'off',
+    'space-before-function-paren': 0,
+    // allow debugger during development
+    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off'
+  }
+}

Diff for: .gitattributes

@@ -0,0 +1,3 @@
+*.sh text eol=lf
+package.json text eol=lf
+package-lock.json text eol=lf

Diff for: .gitignore

@@ -40,3 +40,4 @@ jspm_packages
 dist/
 src/critical.css
 .wwp-cache/
+/test/unit/coverage/

Diff for: jest.config.js

@@ -0,0 +1,24 @@
+module.exports = {
+    moduleFileExtensions: [
+      'js',
+      'json',
+      'vue'
+    ],
+    moduleNameMapper: {
+      '^@/(.*)$': '<rootDir>/src/$1'
+    },
+    transform: {
+      '^.+\\.js$': '<rootDir>/node_modules/babel-jest',
+      '.*\\.(vue)$': '<rootDir>/node_modules/vue-jest'
+    },
+    snapshotSerializers: ['<rootDir>/node_modules/jest-serializer-vue'],
+    //setupFiles: ['<rootDir>/test/unit/setup'],
+    coverageDirectory: '<rootDir>/test/unit/coverage',
+    collectCoverageFrom: [
+      'src/**/*.{js,vue}',
+      '!src/ld-json.js',
+      '!src/app.js',
+      '!**/node_modules/**'
+    ]
+  }
+