design: add test change_detection

Author: mhevery

modules/change_detection/src/watch_group.js

@@ -48,15 +48,6 @@ export class ProtoWatchGroup {
  return watchGroup;
  }
 
- /**
- * Sets the context (the object) on which the change detection expressions will
- * dereference themselves on. Since the WatchGroup can be reused the context
- * can be re-set many times during the lifetime of the WatchGroup.
- *
- * @param context the new context for change dection for the curren WatchGroup
- */
- setContext(context) {
- }
 }
 
 export class WatchGroup {
@@ -79,6 +70,15 @@ export class WatchGroup {
  /// IMPLEMENT
  }
 
+ /**
+ * Sets the context (the object) on which the change detection expressions will
+ * dereference themselves on. Since the WatchGroup can be reused the context
+ * can be re-set many times during the lifetime of the WatchGroup.
+ *
+ * @param context the new context for change dection for the curren WatchGroup
+ */
+ setContext(context) {
+ }
 }
 
 export class WatchGroupDispatcher {

modules/change_detection/test/change_detection_spec.js

@@ -0,0 +1,42 @@
+import {describe, it, expect} from 'test_lib/test_lib';
+import {ProtoWatchGroup, WatchGroup, WatchGroupDispatcher} from 'change_detection/watch_group';
+import {DOM} from 'facade/dom';
+
+
+export function main() {
+ describe('change_detection', function() {
+ describe('ChangeDetection', function() {
+ it('should do simple watching', function() {
+ return; // remove me after getting the test to pass.
+ var person = new Person('misko', 38);
+ var pwg = new ProtoWatchGroup();
+ pwg.watch('name', 'nameToken');
+ pwg.watch('age', 'ageToken');
+ var dispatcher = new LoggingDispatcher();
+ var wg = pwg.instantiate(dispatcher);
+ wg.setContext(person);
+ var cd = new ChangeDetection(wg);
+ cd.detectChanges();
+ expect(dispatcher.log).toEqual(['ageToken=38']);
+ dispatcher.clear();
+ cd.detectChanges();
+ expect(dispatcher.log).toEqual([]);
+ person.age=1;
+ person.name="Misko";
+ cd.detectChanges();
+ expect(dispatcher.log).toEqual(['nameToken=Misko', 'ageToken=1']);
+ });
+ });
+ });
+}
+
+class Person {
+ constructor(name:string, age:number) {
+ this.name = null;
+ this.a
+ }
+}
+
+class Dispatcher extends WatchGroupDispatcher {
+
+}