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fix(core): clean up TestabilityRegistry on platform destroy to avoid memory leaks #14819

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fix(core): clean up TestabilityRegistry on platform destroy to avoid memory leaks #14819

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fix(core): clean up TestabilityRegistry on platform destroy to avoid … 
…memory leaks

Closes #13725
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Dzmitry Shylovich committed Feb 28, 2017
commit b9f6585b162a0ab2e03bfa521bbc123d94a64e62
1 change: 1 addition & 0 deletions modules/@angular/core/src/application_ref.ts
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Expand Up @@ -276,6 +276,7 @@ export class PlatformRef_ extends PlatformRef {
}
this._modules.slice().forEach(module => module.destroy());
this._destroyListeners.forEach(listener => listener());
this._injector.get(TestabilityRegistry).destroy();
this._destroyed = true;
}

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8 changes: 8 additions & 0 deletions modules/@angular/core/src/testability/testability.ts
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Expand Up @@ -145,6 +145,11 @@ export class TestabilityRegistry {
findTestabilityInTree(elem: Node, findInAncestors: boolean = true): Testability {
return _testabilityGetter.findTestabilityInTree(this, elem, findInAncestors);
}

destroy(): void {
this._applications.clear();
_testabilityGetter.onDestroy();
}
}

/**
Expand All @@ -158,6 +163,7 @@ export interface GetTestability {
addToWindow(registry: TestabilityRegistry): void;
findTestabilityInTree(registry: TestabilityRegistry, elem: any, findInAncestors: boolean):
Testability;
onDestroy(): void;
}

class _NoopGetTestability implements GetTestability {
Expand All @@ -166,6 +172,8 @@ class _NoopGetTestability implements GetTestability {
Testability {
return null;
}

onDestroy(): void {}
}

/**
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7 changes: 7 additions & 0 deletions modules/@angular/platform-browser/src/browser/testability.ts
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Expand Up @@ -65,4 +65,11 @@ export class BrowserGetTestability implements GetTestability {
}
return this.findTestabilityInTree(registry, getDOM().parentElement(elem), true);
}

onDestroy(): void {
delete global.getAngularTestability;
delete global.getAllAngularTestabilities;
delete global.getAllAngularRootElements;
delete global.frameworkStabilizers;
}
}
1 change: 1 addition & 0 deletions tools/public_api_guard/core/typings/core.d.ts
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Expand Up @@ -966,6 +966,7 @@ export declare class Testability implements PublicTestability {
/** @experimental */
export declare class TestabilityRegistry {
constructor();
destroy(): void;
findTestabilityInTree(elem: Node, findInAncestors?: boolean): Testability;
getAllRootElements(): any[];
getAllTestabilities(): Testability[];
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