Adding Angular and dependent packages for testing

third_party/pkg/angular/test/directive/ng_events_spec.dart

+library ng_events_spec;
+
+import '../_specs.dart';
+import 'dart:html' as dom;
+
+void addTest(String name, [String eventType='MouseEvent', String eventName]) {
+  if (eventName == null) {
+    eventName = name;
+  }
+
+  describe('ng-$name', () {
+    TestBed _;
+
+    beforeEach(inject((TestBed tb) => _ = tb));
+
+    it('should evaluate the expression on $name', inject(() {
+      _.compile('<button ng-$name="abc = true; event = \$event"></button>');
+      _.triggerEvent(_.rootElement, eventName, eventType);
+      expect(_.rootScope['abc']).toEqual(true);
+      expect(_.rootScope['event'] is dom.UIEvent).toEqual(true);
+    }));
+  });
+}
+
+main() {
+    addTest('blur');
+    addTest('change');
+    addTest('click');
+    addTest('contextmenu');
+    // The event name differs from the ng- directive name.
+    addTest('doubleclick', 'MouseEvent', 'dblclick');
+    addTest('dragenter');
+    addTest('dragleave');
+    addTest('dragover');
+    addTest('dragstart');
+    addTest('drop');
+    addTest('focus');
+    addTest('keydown', 'KeyboardEvent');
+    addTest('keypress', 'KeyboardEvent');
+    addTest('keyup', 'KeyboardEvent');
+    addTest('mousedown');
+    addTest('mouseenter');
+    addTest('mouseleave');
+    addTest('mousemove');
+    addTest('mouseout');
+    addTest('mouseover');
+    addTest('mouseup');
+    addTest('mousewheel', 'MouseEvent', 'wheel');
+    addTest('scroll');
+    // These should be of type TouchEvent but that causes the tests to fail.
+    // They pass as a MouseEvent.
+    addTest('touchcancel'/*, 'TouchEvent'*/);
+    addTest('touchend'/*, 'TouchEvent'*/);
+    addTest('touchmove'/*, 'TouchEvent'*/);
+    addTest('touchstart'/*, 'TouchEvent'*/);
+}