81 lines
2.5 KiB
TypeScript
81 lines
2.5 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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/**
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* A `TaskTrackingZoneSpec` allows one to track all outstanding Tasks.
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*
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* This is useful in tests. For example to see which tasks are preventing a test from completing
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* or an automated way of releasing all of the event listeners at the end of the test.
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*/
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class TaskTrackingZoneSpec implements ZoneSpec {
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name = 'TaskTrackingZone';
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microTasks: Task[] = [];
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macroTasks: Task[] = [];
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eventTasks: Task[] = [];
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properties: {[key: string]: any} = {'TaskTrackingZone': this};
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static get() { return Zone.current.get('TaskTrackingZone'); }
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private getTasksFor(type: string): Task[] {
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switch (type) {
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case 'microTask':
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return this.microTasks;
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case 'macroTask':
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return this.macroTasks;
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case 'eventTask':
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return this.eventTasks;
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}
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throw new Error('Unknown task format: ' + type);
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}
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onScheduleTask(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task):
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Task {
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(task as any)['creationLocation'] = new Error(`Task '${task.type}' from '${task.source}'.`);
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const tasks = this.getTasksFor(task.type);
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tasks.push(task);
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return parentZoneDelegate.scheduleTask(targetZone, task);
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}
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onCancelTask(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task):
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any {
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const tasks = this.getTasksFor(task.type);
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for (let i = 0; i < tasks.length; i++) {
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if (tasks[i] == task) {
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tasks.splice(i, 1);
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break;
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}
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}
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return parentZoneDelegate.cancelTask(targetZone, task);
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}
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onInvokeTask(
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parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task,
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applyThis: any, applyArgs: any): any {
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if (task.type === 'eventTask')
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return parentZoneDelegate.invokeTask(targetZone, task, applyThis, applyArgs);
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const tasks = this.getTasksFor(task.type);
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for (let i = 0; i < tasks.length; i++) {
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if (tasks[i] == task) {
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tasks.splice(i, 1);
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break;
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}
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}
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return parentZoneDelegate.invokeTask(targetZone, task, applyThis, applyArgs);
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}
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clearEvents() {
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while (this.eventTasks.length) {
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Zone.current.cancelTask(this.eventTasks[0]);
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}
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}
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}
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// Export the class so that new instances can be created with proper
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// constructor params.
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(Zone as any)['TaskTrackingZoneSpec'] = TaskTrackingZoneSpec;
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