build: upload coverage to firebase

* Introduces a gulp task that will run on Travis Push builds and will upload coverage results to a Firebase database.

Closes #128.

Author: devversion

package.json

@@ -84,6 +84,7 @@
     "karma": "^1.5.0",
     "karma-browserstack-launcher": "^1.2.0",
     "karma-chrome-launcher": "^2.0.0",
+    "karma-coverage": "^1.1.1",
     "karma-firefox-launcher": "^1.0.1",
     "karma-jasmine": "^1.1.0",
     "karma-sauce-launcher": "^1.1.0",

scripts/ci/build-and-test.sh

@@ -11,8 +11,8 @@ source scripts/ci/sources/mode.sh
 source scripts/ci/sources/tunnel.sh
 
 start_tunnel
-
 wait_for_tunnel
+
 if is_lint; then
   $(npm bin)/gulp ci:lint
 elif is_e2e; then
@@ -24,4 +24,10 @@ elif is_payload; then
 else
   $(npm bin)/gulp ci:test
 fi
+
+# Don't upload coverage for both test modes (browserstack and saucelabs) and inside of PRs.
+if [[ "$MODE" == "saucelabs_required" ]] && [ "$TRAVIS_PULL_REQUEST" = "false" ]; then
+  $(npm bin)/gulp ci:coverage
+fi
+
 teardown_tunnel

test/karma.conf.js

@@ -12,7 +12,8 @@ module.exports = (config) => {
       require('karma-sauce-launcher'),
       require('karma-chrome-launcher'),
       require('karma-firefox-launcher'),
-      require('karma-sourcemap-loader')
+      require('karma-sourcemap-loader'),
+      require('karma-coverage')
     ],
     files: [
       {pattern: 'dist/vendor/core-js/client/core.js', included: true, watched: false},
@@ -50,16 +51,23 @@ module.exports = (config) => {
 
     customLaunchers: customLaunchers,
 
-    exclude: [],
     preprocessors: {
-      '**/*.js': ['sourcemap']
+      'dist/@angular/material/**/*.js': ['sourcemap']
     },
+
     reporters: ['dots'],
+
     port: 9876,
     colors: true,
     logLevel: config.LOG_INFO,
     autoWatch: false,
 
+    coverageReporter: {
+      type : 'json-summary',
+      dir : 'dist/coverage/',
+      subdir: '.'
+    },
+
     sauceLabs: {
       testName: 'material2',
       startConnect: false,
@@ -92,6 +100,11 @@ module.exports = (config) => {
   if (process.env['TRAVIS']) {
     let buildId = `TRAVIS #${process.env.TRAVIS_BUILD_NUMBER} (${process.env.TRAVIS_BUILD_ID})`;
 
+    if (process.env['TRAVIS_PULL_REQUEST'] === 'false') {
+      config.preprocessors['dist/@angular/material/**/!(*+(.|-)spec).js'] = ['coverage'];
+      config.reporters.push('coverage');
+    }
+
     // The MODE variable is the indicator of what row in the test matrix we're running.
     // It will look like <platform>_<alias>, where platform is one of 'saucelabs' or 'browserstack',
     // and alias is one of the keys in the CI configuration variable declared in

tools/gulp/constants.ts

@@ -8,6 +8,8 @@ export const SOURCE_ROOT = join(PROJECT_ROOT, 'src');
 export const DIST_ROOT = join(PROJECT_ROOT, 'dist');
 export const DIST_COMPONENTS_ROOT = join(DIST_ROOT, '@angular/material');
 
+export const COVERAGE_RESULT_FILE = join(DIST_ROOT, 'coverage', 'coverage-summary.json');
+
 export const SASS_AUTOPREFIXER_OPTIONS = {
   browsers: [
     'last 2 versions',

tools/gulp/gulpfile.ts

@@ -13,3 +13,4 @@ import './tasks/unit-test';
 import './tasks/docs';
 import './tasks/aot';
 import './tasks/payload';
+import './tasks/coverage';

tools/gulp/tasks/ci.ts

@@ -17,3 +17,6 @@ task('ci:aot', ['aot:build']);
 
 /** Task which reports the size of the library and stores it in a database. */
 task('ci:payload', ['payload']);
+
+/** Task that uploads the coverage results to a firebase database. */
+task('ci:coverage', ['coverage:upload']);

tools/gulp/tasks/coverage.ts

@@ -0,0 +1,34 @@
+import {task} from 'gulp';
+import {existsSync} from 'fs-extra';
+import {COVERAGE_RESULT_FILE} from '../constants';
+import {spawnSync} from 'child_process';
+import {isTravisPushBuild, openFirebaseDashboardDatabase} from '../task_helpers';
+
+task('coverage:upload', () => {
+  if (!existsSync(COVERAGE_RESULT_FILE)) {
+    throw new Error('No coverage file has been found!');
+  }
+
+  if (!isTravisPushBuild()) {
+    throw new Error('Coverage results will be only uploaded inside of Travis Push builds.');
+  }
+
+  let results = require(COVERAGE_RESULT_FILE)['total'];
+
+  // To reduce database payload, the covered lines won't be pushed to the Firebase database.
+  delete results['linesCovered'];
+
+  return uploadResults(results);
+});
+
+/** Uploads the coverage results to the firebase database. */
+function uploadResults(results: any): Promise<void> {
+  let latestSha = spawnSync('git', ['rev-parse', 'HEAD']).stdout.toString().trim();
+  let database = openFirebaseDashboardDatabase();
+
+  return database.ref('coverage-reports').child(latestSha).set(results)
+    .then(() => database.goOffline(), () => database.goOffline());
+}
+
+// TODO(devversion): In the future we might have a big database where we can store full summaries.
+// TODO(devversion): We could also move the coverage to a bot and reply with the results on PRs.