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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n\nconst FakeAsyncTestZoneSpec = (Zone as any)['FakeAsyncTestZoneSpec'];\ntype ProxyZoneSpec = {\n setDelegate(delegateSpec: ZoneSpec): void; getDelegate(): ZoneSpec; resetDelegate(): void;\n};\nconst ProxyZoneSpec: {get(): ProxyZoneSpec; assertPresent: () => ProxyZoneSpec} =\n (Zone as any)['ProxyZoneSpec'];\n\nlet _fakeAsyncTestZoneSpec: any = null;\n\n/**\n * Clears out the shared fake async zone for a test.\n * To be called in a global `beforeEach`.\n *\n * @experimental\n */\nexport function resetFakeAsyncZone() {\n _fakeAsyncTestZoneSpec = null;\n ProxyZoneSpec.assertPresent().resetDelegate();\n}\n\nlet _inFakeAsyncCall = false;\n\n/**\n * Wraps a function to be executed in the fakeAsync zone:\n * - microtasks are manually executed by calling `flushMicrotasks()`,\n * - timers are synchronous, `tick()` simulates the asynchronous passage of time.\n *\n * If there are any pending timers at the end of the function, an exception will be thrown.\n *\n * Can be used to wrap inject() calls.\n *\n * ## Example\n *\n * {@example testing/ts/fake_async.ts region='basic'}\n *\n * @param fn\n * @returns {Function} The function wrapped to be executed in the fakeAsync zone\n *\n * @experimental\n */\nexport function fakeAsync(fn: Function): (...args: any[]) => any {\n return function(...args: any[]) {\n const proxyZoneSpec = ProxyZoneSpec.assertPresent();\n if (_inFakeAsyncCall) {\n throw new Error('fakeAsync() calls can not be nested');\n }\n _inFakeAsyncCall = true;\n try {\n if (!_fakeAsyncTestZoneSpec) {\n if (proxyZoneSpec.getDelegate() instanceof FakeAsyncTestZoneSpec) {\n throw new Error('fakeAsync() calls can not be nested');\n }\n\n _fakeAsyncTestZoneSpec = new FakeAsyncTestZoneSpec();\n }\n\n let res: any;\n const lastProxyZoneSpec = proxyZoneSpec.getDelegate();\n proxyZoneSpec.setDelegate(_fakeAsyncTestZoneSpec);\n try {\n res = fn(...args);\n flushMicrotasks();\n } finally {\n proxyZoneSpec.setDelegate(lastProxyZoneSpec);\n }\n\n if (_fakeAsyncTestZoneSpec.pendingPeriodicTimers.length > 0) {\n throw new Error(\n `${_fakeAsyncTestZoneSpec.pendingPeriodicTimers.length} ` +\n `periodic timer(s) still in the queue.`);\n }\n\n if (_fakeAsyncTestZoneSpec.pendingTimers.length > 0) {\n throw new Error(\n `${_fakeAsyncTestZoneSpec.pendingTimers.length} timer(s) still in the queue.`);\n }\n return res;\n } finally {\n _inFakeAsyncCall = false;\n resetFakeAsyncZone();\n }\n };\n}\n\nfunction _getFakeAsyncZoneSpec(): any {\n if (_fakeAsyncTestZoneSpec == null) {\n throw new Error('The code should be running in the fakeAsync zone to call this function');\n }\n return _fakeAsyncTestZoneSpec;\n}\n\n/**\n * Simulates the asynchronous passage of time for the timers in the fakeAsync zone.\n *\n * The microtasks queue is drained at the very start of this function and after any timer callback\n * has been executed.\n *\n * ## Example\n *\n * {@example testing/ts/fake_async.ts region='basic'}\n *\n * @experimental\n */\nexport function tick(millis: number = 0): void {\n _getFakeAsyncZoneSpec().tick(millis);\n}\n\n/**\n * Discard all remaining periodic tasks.\n *\n * @experimental\n */\nexport function discardPeriodicTasks(): void {\n const zoneSpec = _getFakeAsyncZoneSpec();\n const pendingTimers = zoneSpec.pendingPeriodicTimers;\n zoneSpec.pendingPeriodicTimers.length = 0;\n}\n\n/**\n * Flush any pending microtasks.\n *\n * @experimental\n */\nexport function flushMicrotasks(): void {\n _getFakeAsyncZoneSpec().flushMicrotasks();\n}\n\ninterface DecoratorInvocation {\n type: Function;\n args?: any[];\n}\n"]} |