test: report karma results as json (#14860)

Author: andrewseguin

package.json

@@ -111,6 +111,7 @@
     "karma-chrome-launcher": "^2.2.0",
     "karma-firefox-launcher": "^1.0.1",
     "karma-jasmine": "^2.0.1",
+    "karma-json-result-reporter": "^1.0.0",
     "karma-parallel": "^0.3.0",
     "karma-sauce-launcher": "^2.0.2",
     "karma-sourcemap-loader": "^0.3.7",
@@ -133,7 +134,6 @@
     "selenium-webdriver": "^3.6.0",
     "sorcery": "^0.10.0",
     "source-map-support": "^0.5.9",
-    "stylelint": "^9.9.0",
     "stylelint": "^8.4.0",
     "systemjs-builder": "^0.16.13",
     "ts-node": "^3.0.4",

test/karma.conf.js

@@ -13,6 +13,7 @@ module.exports = config => {
       require('karma-chrome-launcher'),
       require('karma-firefox-launcher'),
       require('karma-sourcemap-loader'),
+      require('karma-json-result-reporter'),
       {'middleware:fake-url': ['factory', function() {
         // Middleware that avoids triggering 404s during tests that need to reference
         // image paths. Assumes that the image path will start with `/$`.
@@ -60,9 +61,13 @@ module.exports = config => {
       'dist/packages/**/*.js': ['sourcemap']
     },
 
-    reporters: ['dots'],
+    reporters: ['dots', 'json-result'],
     autoWatch: false,
 
+    jsonResultReporter: {
+      outputFile: "/tmp/karma-result.json",
+    },
+
     sauceLabs: {
       testName: 'Angular Material Unit Tests',
       startConnect: false,