build(karma): add browser testing capability

Signed-off-by: suyukuoacn <su-yu.kuo@accenture.com>

.gitignore

@@ -7,6 +7,7 @@ docs/main
 logs/
 jspm_packages/
 generated-sources/
+coverage/
 
 # Optional npm cache directory
 .npm

karma.conf.js

@@ -0,0 +1,100 @@
+module.exports = (config) => {
+  config.set({
+    singleRun: true,
+    logLevel: config.LOG_INFO,
+    colors: true,
+
+    frameworks: ["tap"],
+
+    // Use "Chrome" if you need to debug tests with the actual browser window
+    // being open and you want to use Chrome Dev Tools for it.
+    browsers: [
+      // 'Electron',
+      // "ElectronWithGui",
+      // 'Chrome',
+      // 'ChromeHeadless',
+      "ChromeHeadlessDebug",
+    ],
+
+    files: [
+      {
+        pattern: "packages/cactus-common/src/test/typescript/unit/**/*.ts",
+      },
+    ],
+
+    plugins: [
+      "karma-chrome-launcher",
+      "karma-electron",
+      "karma-tap",
+      "karma-webpack",
+    ],
+
+    preprocessors: {
+      "**/*.ts": ["webpack"],
+    },
+
+    browserConsoleLogOptions: {
+      level: "debug",
+      format: "%b %T: %m",
+      terminal: true,
+    },
+
+    reporters: ["dots"],
+
+    webpack: {
+      mode: "development",
+      devtool: "inline-source-map",
+      module: {
+        rules: [
+          {
+            test: /\.ts$/,
+            exclude: /node_modules/,
+            use: [
+              {
+                loader: "ts-loader",
+              },
+            ],
+          },
+        ],
+      },
+      resolve: {
+        extensions: [".ts", ".js"],
+      },
+      node: {
+        fs: "empty",
+      },
+    },
+
+    webpackMiddleware: {
+      // without this the webpack compilation log is shown as well
+      stats: "errors-only",
+    },
+
+    customLaunchers: {
+      ElectronWithGui: {
+        base: "Electron",
+        flags: [
+          "--show",
+          "--disable-translate",
+          "--disable-extensions",
+          "--no-first-run",
+          "--disable-background-networking",
+          "--remote-debugging-port=9222",
+          "--remote-debugging-address=127.0.0.1",
+        ],
+      },
+
+      ChromeHeadlessDebug: {
+        base: "ChromeHeadless",
+        flags: [
+          "--disable-translate",
+          "--disable-extensions",
+          "--no-first-run",
+          "--disable-background-networking",
+          "--remote-debugging-port=9222",
+          "--remote-debugging-address=127.0.0.1",
+        ],
+      },
+    },
+  });
+};