Add some unittests. npm i && ng test to run

karma.conf.js

@@ -1,15 +1,20 @@
 // Karma configuration file, see link for more information
 // https://karma-runner.github.io/1.0/config/configuration-file.html
 
+const process = require('process');
+process.env.CHROME_BIN = require('puppeteer').executablePath();
+
 module.exports = function (config) {
   config.set({
     basePath: '',
+    files: ['src/assets/env.js'],
     frameworks: ['jasmine', '@angular-devkit/build-angular'],
     plugins: [
       require('karma-jasmine'),
       require('karma-chrome-launcher'),
       require('karma-jasmine-html-reporter'),
       require('karma-coverage-istanbul-reporter'),
+      require('karma-spec-reporter'),
       require('@angular-devkit/build-angular/plugins/karma')
     ],
     client: {
@@ -20,13 +25,12 @@ module.exports = function (config) {
       reports: ['html', 'lcovonly', 'text-summary'],
       fixWebpackSourcePaths: true
     },
-    reporters: ['progress', 'kjhtml'],
+    reporters: ['progress', 'kjhtml', 'spec'],
     port: 9876,
     colors: true,
     logLevel: config.LOG_INFO,
     autoWatch: true,
-    browsers: ['Chrome'],
-    singleRun: false,
-    restartOnFileChange: true
+    browsers: ['ChromeHeadless'],
+    singleRun: true
   });
 };