GUI2 add a karma.conf.js for unit tests

Change-Id: I2db9e9fcbaa6b6cf0dcdae38bff8628c0e706cf4
diff --git a/web/gui2/src/main/webapp/karma.conf.js b/web/gui2/src/main/webapp/karma.conf.js
new file mode 100644
index 0000000..20c914f
--- /dev/null
+++ b/web/gui2/src/main/webapp/karma.conf.js
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2020-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Karma configuration file, see link for more information
+// https://karma-runner.github.io/1.0/config/configuration-file.html
+
+module.exports = function(config) {
+    config.set({
+        basePath: '',
+        frameworks: ['jasmine', '@angular-devkit/build-angular'],
+        plugins: [
+            require('karma-jasmine'),
+            require('karma-chrome-launcher'),
+            require('karma-firefox-launcher'),
+            require('karma-jasmine-html-reporter'),
+            require('karma-coverage-istanbul-reporter'),
+            require('@angular-devkit/build-angular/plugins/karma')
+        ],
+        client: {
+            clearContext: false  // leave Jasmine Spec Runner output visible in browser
+        },
+        coverageIstanbulReporter: {
+            dir: require('path').join(__dirname, './coverage/frontend'),
+            reports: ['html', 'lcovonly', 'text-summary'],
+            fixWebpackSourcePaths: true
+        },
+        angularCli: {
+            environment: 'dev'
+        },
+        reporters: ['progress', 'kjhtml'],
+        port: 9876,
+        colors: true,
+        logLevel: config.LOG_INFO,
+        autoWatch: true,
+        customLaunchers: {
+            ChromeHeadlessNoSandbox: {
+                base: 'ChromeHeadless',
+                flags: ['--no-sandbox', '--disable-gpu', '--disable-dev-shm-usage']
+            }
+        },
+        browsers: ['ChromeHeadlessNoSandbox', 'Firefox'],
+        singleRun: false,
+        restartOnFileChange: true
+    });
+};