add tests dependencies and configuration

karma.conf.js

@@ -0,0 +1,43 @@
+// const path = require('path')
+
+module.exports = function (config) {
+  config.set({
+    frameworks: ['jasmine'],
+    files: [
+      'test/**/*.spec.js'
+    ],
+    exclude: [],
+    preprocessors: {
+      'test/**/*.js': ['webpack', 'sourcemap', 'coverage']
+    },
+    reporters: ['progress', 'coverage'],
+    coverageReporter: {
+      dir: 'coverage/',
+      type: 'lcov',
+      subdir: '.',
+      includeAllSources: true,
+      fixWebpackSourcePaths: true,
+      combineBrowserReports: true
+    },
+    port: 9876,
+    colors: true,
+    logLevel: config.LOG_ERROR,
+    autoWatch: false,
+    browsers: ['ChromeHeadless'],
+    singleRun: true,
+    concurrency: 1,
+    webpack: {
+      mode: 'development'
+      // TODO: Configure istanbul to interpret how webpack bundles files
+      // module: {
+      //   rules: [
+      //     {
+      //       test: /\.js$/,
+      //       use: { loader: 'istanbul-instrumenter-loader' },
+      //       include: path.resolve('src/js/index.js')
+      //     }
+      //   ]
+      // }
+    }
+  })
+}

package.json

@@ -7,12 +7,22 @@
   "types": "./index.d.ts",
   "repository": "https://github.com/crabbly/Print.js",
   "license": "MIT",
-  "dependences": {},
+  "dependencies": {},
   "devDependencies": {
     "babel-core": "^6.26.3",
     "babel-loader": "^7.1.5",
     "babel-preset-env": "^1.7.0",
+    "coveralls": "^3.0.2",
     "css-loader": "^1.0.0",
+    "istanbul-instrumenter-loader": "^3.0.1",
+    "jasmine-core": "^3.2.1",
+    "karma": "^3.0.0",
+    "karma-chrome-launcher": "^2.2.0",
+    "karma-coverage": "^1.1.2",
+    "karma-jasmine": "^1.1.2",
+    "karma-phantomjs-launcher": "^1.0.4",
+    "karma-sourcemap-loader": "^0.3.7",
+    "karma-webpack": "^3.0.5",
     "mini-css-extract-plugin": "^0.4.1",
     "node-sass": "^4.9.3",
     "optimize-css-assets-webpack-plugin": "^5.0.0",
@@ -23,16 +33,22 @@
     "webpack-cli": "^3.1.0"
   },
   "scripts": {
-    "test": "standard",
+    "test": "standard && karma start",
     "dev": "webpack --mode development --progress --hide-modules --devtool source-map",
     "watch": "webpack --mode development --watch --progress --hide-modules",
-    "production": "webpack --mode production --progress --hide-modules"
+    "production": "webpack --mode production --progress --hide-modules",
+    "coverage": "open coverage/lcov-report/index.html",
+    "coveralls": "cat coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js"
   },
   "author": "Rodrigo Vieira <rodrigo@crabbly.com>",
   "standard": {
     "ignore": [
       "/dist/print.js"
-    ]
+    ],
+    "env": {
+      "browser": true,
+      "jasmine": true
+    }
   },
   "keywords": [
     "printjs",

webpack.config.js

@@ -27,6 +27,16 @@ module.exports = {
           }
         }
       },
+      // TODO: Configure istanbul to interpret how webpack bundles files
+      // {
+      //   test: /\.js$/,
+      //   use: {
+      //     loader: 'istanbul-instrumenter-loader',
+      //     options: { esModules: true }
+      //   },
+      //   enforce: 'post',
+      //   exclude: /node_modules|\.spec\.js$/
+      // },
       {
         test: /\.scss$/,
         use: [