Added notify reporter test (for review)

packages/jest-cli/src/__tests__/__snapshots__/notify_reporter.test.js.snap

@@ -0,0 +1,11 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`test always 1`] = `
+Array [
+  Object {
+    "icon": "SUCCESS_ICON",
+    "message": "✅ 3 tests passed",
+    "title": "100% Passed",
+  },
+]
+`;

packages/jest-cli/src/__tests__/notify_reporter.test.js

@@ -0,0 +1,74 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+'use strict';
+
+import TestScheduler from '../test_scheduler';
+import NotifyReporter from '../reporters/notify_reporter';
+import type {TestSchedulerContext} from '../test_scheduler';
+
+const SUCCESS_ICON_PATH = '/assets/jest_logo.png';
+const FAILURE_ICON_PATH = 'TODO';
+
+jest.mock('../reporters/default_reporter');
+jest.mock('node-notifier', () => ({
+  notify: jest.fn(),
+}));
+
+const initialContext: TestSchedulerContext = {
+  firstRun: true,
+  previousSuccess: false,
+};
+
+const aggregatedResultsSuccess: AggregatedResult = {
+  numFailedTestSuites: 0,
+  numFailedTests: 0,
+  numPassedTestSuites: 1,
+  numPassedTests: 3,
+  numRuntimeErrorTestSuites: 0,
+  numTotalTestSuites: 1,
+  numTotalTests: 3,
+  success: true,
+};
+
+const iconDir = path => {
+  if (path.endsWith(SUCCESS_ICON_PATH)) {
+    return 'SUCCESS_ICON';
+  } else if (path.endsWith(FAILURE_ICON_PATH)) {
+    return 'FAILURE_ICON';
+  } else {
+    return 'ICON_NOT_FOUND';
+  }
+};
+
+test('.addReporter() .removeReporter()', () => {
+  const scheduler = new TestScheduler({}, {}, initialContext);
+  const reporter = new NotifyReporter();
+  scheduler.addReporter(reporter);
+  expect(scheduler._dispatcher._reporters).toContain(reporter);
+  scheduler.removeReporter(NotifyReporter);
+  expect(scheduler._dispatcher._reporters).not.toContain(reporter);
+});
+
+test('test always', () => {
+  const notify = require('node-notifier');
+
+  const reporter = new NotifyReporter(
+    {notify: true, notifyMode: 'always'},
+    {},
+    initialContext,
+  );
+  reporter.onRunComplete(new Set(), aggregatedResultsSuccess);
+  expect(
+    notify.notify.mock.calls.map(([{icon, message, title}]) => ({
+      icon: iconDir(icon),
+      message,
+      title,
+    })),
+  ).toMatchSnapshot();
+});