feat(testability): option to disable tree walking

Author: goderbauer

modules/angular2/src/core/testability/get_testability.dart

@@ -91,8 +91,9 @@ class PublicTestability implements _JsObjectProxyable {
 
 class GetTestability {
  static addToWindow(TestabilityRegistry registry) {
- js.context['getAngularTestability'] = _jsify((Element elem) {
- Testability testability = registry.findTestabilityInTree(elem);
+ js.context['getAngularTestability'] = _jsify((Element elem,
+ [bool findInAncestors = true]) {
+ Testability testability = registry.findTestabilityInTree(elem, findInAncestors);
  if (testability == null) {
  throw 'Could not find testability for element.';
  }

modules/angular2/src/core/testability/get_testability.ts

@@ -15,14 +15,15 @@ class PublicTestability {
 
 export class GetTestability {
  static addToWindow(registry: TestabilityRegistry) {
- global.getAngularTestability = function(elem: Element): PublicTestability {
- var testability = registry.findTestabilityInTree(elem);
+ global.getAngularTestability = function(elem: Element, findInAncestors: boolean = true):
+ PublicTestability {
+ var testability = registry.findTestabilityInTree(elem, findInAncestors);
 
- if (testability == null) {
- throw new Error('Could not find testability for element.');
- }
- return new PublicTestability(testability);
- };
+  if (testability == null) {
+  throw new Error('Could not find testability for element.');
+  }
+  return new PublicTestability(testability);
+  };
  global.getAllAngularTestabilities = function(): List<PublicTestability> {
  var testabilities = registry.getAllTestabilities();
  return testabilities.map((testability) => { return new PublicTestability(testability); });

modules/angular2/src/core/testability/testability.ts

@@ -84,12 +84,14 @@ export class TestabilityRegistry {
 
  getAllTestabilities(): List<Testability> { return MapWrapper.values(this._applications); }
 
- findTestabilityInTree(elem: Node): Testability {
+ findTestabilityInTree(elem: Node, findInAncestors: boolean = true): Testability {
  if (elem == null) {
  return null;
  }
  if (this._applications.has(elem)) {
  return this._applications.get(elem);
+ } else if (!findInAncestors) {
+ return null;
  }
  if (DOM.isShadowRoot(elem)) {
  return this.findTestabilityInTree(DOM.getHost(elem));