Merge pull request #13 from github/test

Create tests

Author: muan

.eslintignore

@@ -0,0 +1,2 @@
+dist
+prettier.config.js

.eslintrc.json

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+{
+  "extends": [
+    "plugin:flowtype/recommended",
+    "plugin:github/es6",
+    "plugin:github/browser"
+  ],
+  "parser": "babel-eslint"
+}

.github/workflows/test.yml

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+name: Node CI
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js 12.x
+      uses: actions/setup-node@v1
+      with:
+        node-version: 12.x
+    - name: npm install, build, and test
+      run: |
+        npm ci
+        npm test
+      env:
+        CI: true

karma.config.js

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+module.exports = function(config) {
+  config.set({
+    frameworks: ['mocha', 'chai'],
+    files: [{pattern: 'dist/index.esm.js', type: 'module'}, {pattern: 'test/test.js', type: 'module'}],
+    reporters: ['mocha'],
+    port: 9876,
+    colors: true,
+    logLevel: config.LOG_INFO,
+    browsers: ['ChromeHeadless'],
+    autoWatch: false,
+    singleRun: true,
+    concurrency: Infinity
+  })
+}