source: trip-planner-front/node_modules/@angular/cdk/esm2015/testing/testbed/testbed-harness-environment.js

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { __awaiter } from "tslib";
import { handleAutoChangeDetectionStatus, HarnessEnvironment, stopHandlingAutoChangeDetectionStatus } from '@angular/cdk/testing';
import { flush } from '@angular/core/testing';
import { takeWhile } from 'rxjs/operators';
import { TaskStateZoneInterceptor } from './task-state-zone-interceptor';
import { UnitTestElement } from './unit-test-element';
/** The default environment options. */
const defaultEnvironmentOptions = {
    queryFn: (selector, root) => root.querySelectorAll(selector)
};
/** Whether auto change detection is currently disabled. */
let disableAutoChangeDetection = false;
/**
 * The set of non-destroyed fixtures currently being used by `TestbedHarnessEnvironment` instances.
 */
const activeFixtures = new Set();
/**
 * Installs a handler for change detection batching status changes for a specific fixture.
 * @param fixture The fixture to handle change detection batching for.
 */
function installAutoChangeDetectionStatusHandler(fixture) {
    if (!activeFixtures.size) {
        handleAutoChangeDetectionStatus(({ isDisabled, onDetectChangesNow }) => {
            disableAutoChangeDetection = isDisabled;
            if (onDetectChangesNow) {
                Promise.all(Array.from(activeFixtures).map(detectChanges)).then(onDetectChangesNow);
            }
        });
    }
    activeFixtures.add(fixture);
}
/**
 * Uninstalls a handler for change detection batching status changes for a specific fixture.
 * @param fixture The fixture to stop handling change detection batching for.
 */
function uninstallAutoChangeDetectionStatusHandler(fixture) {
    activeFixtures.delete(fixture);
    if (!activeFixtures.size) {
        stopHandlingAutoChangeDetectionStatus();
    }
}
/** Whether we are currently in the fake async zone. */
function isInFakeAsyncZone() {
    return Zone.current.get('FakeAsyncTestZoneSpec') != null;
}
/**
 * Triggers change detection for a specific fixture.
 * @param fixture The fixture to trigger change detection for.
 */
function detectChanges(fixture) {
    return __awaiter(this, void 0, void 0, function* () {
        fixture.detectChanges();
        if (isInFakeAsyncZone()) {
            flush();
        }
        else {
            yield fixture.whenStable();
        }
    });
}
/** A `HarnessEnvironment` implementation for Angular's Testbed. */
export class TestbedHarnessEnvironment extends HarnessEnvironment {
    constructor(rawRootElement, _fixture, options) {
        super(rawRootElement);
        this._fixture = _fixture;
        /** Whether the environment has been destroyed. */
        this._destroyed = false;
        this._options = Object.assign(Object.assign({}, defaultEnvironmentOptions), options);
        this._taskState = TaskStateZoneInterceptor.setup();
        installAutoChangeDetectionStatusHandler(_fixture);
        _fixture.componentRef.onDestroy(() => {
            uninstallAutoChangeDetectionStatusHandler(_fixture);
            this._destroyed = true;
        });
    }
    /** Creates a `HarnessLoader` rooted at the given fixture's root element. */
    static loader(fixture, options) {
        return new TestbedHarnessEnvironment(fixture.nativeElement, fixture, options);
    }
    /**
     * Creates a `HarnessLoader` at the document root. This can be used if harnesses are
     * located outside of a fixture (e.g. overlays appended to the document body).
     */
    static documentRootLoader(fixture, options) {
        return new TestbedHarnessEnvironment(document.body, fixture, options);
    }
    /** Gets the native DOM element corresponding to the given TestElement. */
    static getNativeElement(el) {
        if (el instanceof UnitTestElement) {
            return el.element;
        }
        throw Error('This TestElement was not created by the TestbedHarnessEnvironment');
    }
    /**
     * Creates an instance of the given harness type, using the fixture's root element as the
     * harness's host element. This method should be used when creating a harness for the root element
     * of a fixture, as components do not have the correct selector when they are created as the root
     * of the fixture.
     */
    static harnessForFixture(fixture, harnessType, options) {
        return __awaiter(this, void 0, void 0, function* () {
            const environment = new TestbedHarnessEnvironment(fixture.nativeElement, fixture, options);
            yield environment.forceStabilize();
            return environment.createComponentHarness(harnessType, fixture.nativeElement);
        });
    }
    /**
     * Flushes change detection and async tasks captured in the Angular zone.
     * In most cases it should not be necessary to call this manually. However, there may be some edge
     * cases where it is needed to fully flush animation events.
     */
    forceStabilize() {
        return __awaiter(this, void 0, void 0, function* () {
            if (!disableAutoChangeDetection) {
                if (this._destroyed) {
                    throw Error('Harness is attempting to use a fixture that has already been destroyed.');
                }
                yield detectChanges(this._fixture);
            }
        });
    }
    /**
     * Waits for all scheduled or running async tasks to complete. This allows harness
     * authors to wait for async tasks outside of the Angular zone.
     */
    waitForTasksOutsideAngular() {
        return __awaiter(this, void 0, void 0, function* () {
            // If we run in the fake async zone, we run "flush" to run any scheduled tasks. This
            // ensures that the harnesses behave inside of the FakeAsyncTestZone similar to the
            // "AsyncTestZone" and the root zone (i.e. neither fakeAsync or async). Note that we
            // cannot just rely on the task state observable to become stable because the state will
            // never change. This is because the task queue will be only drained if the fake async
            // zone is being flushed.
            if (isInFakeAsyncZone()) {
                flush();
            }
            // Wait until the task queue has been drained and the zone is stable. Note that
            // we cannot rely on "fixture.whenStable" since it does not catch tasks scheduled
            // outside of the Angular zone. For test harnesses, we want to ensure that the
            // app is fully stabilized and therefore need to use our own zone interceptor.
            yield this._taskState.pipe(takeWhile(state => !state.stable)).toPromise();
        });
    }
    /** Gets the root element for the document. */
    getDocumentRoot() {
        return document.body;
    }
    /** Creates a `TestElement` from a raw element. */
    createTestElement(element) {
        return new UnitTestElement(element, () => this.forceStabilize());
    }
    /** Creates a `HarnessLoader` rooted at the given raw element. */
    createEnvironment(element) {
        return new TestbedHarnessEnvironment(element, this._fixture, this._options);
    }
    /**
     * Gets a list of all elements matching the given selector under this environment's root element.
     */
    getAllRawElements(selector) {
        return __awaiter(this, void 0, void 0, function* () {
            yield this.forceStabilize();
            return Array.from(this._options.queryFn(selector, this.rawRootElement));
        });
    }
}
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* @license\n * Copyright Google LLC 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\nimport {\n  ComponentHarness,\n  ComponentHarnessConstructor,\n  handleAutoChangeDetectionStatus,\n  HarnessEnvironment,\n  HarnessLoader,\n  stopHandlingAutoChangeDetectionStatus,\n  TestElement\n} from '@angular/cdk/testing';\nimport {ComponentFixture, flush} from '@angular/core/testing';\nimport {Observable} from 'rxjs';\nimport {takeWhile} from 'rxjs/operators';\nimport {TaskState, TaskStateZoneInterceptor} from './task-state-zone-interceptor';\nimport {UnitTestElement} from './unit-test-element';\n\n/** Options to configure the environment. */\nexport interface TestbedHarnessEnvironmentOptions {\n  /** The query function used to find DOM elements. */\n  queryFn: (selector: string, root: Element) => Iterable<Element> | ArrayLike<Element>;\n}\n\n/** The default environment options. */\nconst defaultEnvironmentOptions: TestbedHarnessEnvironmentOptions = {\n  queryFn: (selector: string, root: Element) => root.querySelectorAll(selector)\n};\n\n/** Whether auto change detection is currently disabled. */\nlet disableAutoChangeDetection = false;\n\n/**\n * The set of non-destroyed fixtures currently being used by `TestbedHarnessEnvironment` instances.\n */\nconst activeFixtures = new Set<ComponentFixture<unknown>>();\n\n/**\n * Installs a handler for change detection batching status changes for a specific fixture.\n * @param fixture The fixture to handle change detection batching for.\n */\nfunction installAutoChangeDetectionStatusHandler(fixture: ComponentFixture<unknown>) {\n  if (!activeFixtures.size) {\n    handleAutoChangeDetectionStatus(({isDisabled, onDetectChangesNow}) => {\n      disableAutoChangeDetection = isDisabled;\n      if (onDetectChangesNow) {\n        Promise.all(Array.from(activeFixtures).map(detectChanges)).then(onDetectChangesNow);\n      }\n    });\n  }\n  activeFixtures.add(fixture);\n}\n\n/**\n * Uninstalls a handler for change detection batching status changes for a specific fixture.\n * @param fixture The fixture to stop handling change detection batching for.\n */\nfunction uninstallAutoChangeDetectionStatusHandler(fixture: ComponentFixture<unknown>) {\n  activeFixtures.delete(fixture);\n  if (!activeFixtures.size) {\n    stopHandlingAutoChangeDetectionStatus();\n  }\n}\n\n/** Whether we are currently in the fake async zone. */\nfunction isInFakeAsyncZone() {\n  return Zone!.current.get('FakeAsyncTestZoneSpec') != null;\n}\n\n/**\n * Triggers change detection for a specific fixture.\n * @param fixture The fixture to trigger change detection for.\n */\nasync function detectChanges(fixture: ComponentFixture<unknown>) {\n  fixture.detectChanges();\n  if (isInFakeAsyncZone()) {\n    flush();\n  } else {\n    await fixture.whenStable();\n  }\n}\n\n/** A `HarnessEnvironment` implementation for Angular's Testbed. */\nexport class TestbedHarnessEnvironment extends HarnessEnvironment<Element> {\n  /** Whether the environment has been destroyed. */\n  private _destroyed = false;\n\n  /** Observable that emits whenever the test task state changes. */\n  private _taskState: Observable<TaskState>;\n\n  /** The options for this environment. */\n  private _options: TestbedHarnessEnvironmentOptions;\n\n  protected constructor(rawRootElement: Element, private _fixture: ComponentFixture<unknown>,\n      options?: TestbedHarnessEnvironmentOptions) {\n    super(rawRootElement);\n    this._options = {...defaultEnvironmentOptions, ...options};\n    this._taskState = TaskStateZoneInterceptor.setup();\n    installAutoChangeDetectionStatusHandler(_fixture);\n    _fixture.componentRef.onDestroy(() => {\n      uninstallAutoChangeDetectionStatusHandler(_fixture);\n      this._destroyed = true;\n    });\n  }\n\n  /** Creates a `HarnessLoader` rooted at the given fixture's root element. */\n  static loader(fixture: ComponentFixture<unknown>, options?: TestbedHarnessEnvironmentOptions):\n      HarnessLoader {\n    return new TestbedHarnessEnvironment(fixture.nativeElement, fixture, options);\n  }\n\n  /**\n   * Creates a `HarnessLoader` at the document root. This can be used if harnesses are\n   * located outside of a fixture (e.g. overlays appended to the document body).\n   */\n  static documentRootLoader(fixture: ComponentFixture<unknown>,\n      options?: TestbedHarnessEnvironmentOptions): HarnessLoader {\n    return new TestbedHarnessEnvironment(document.body, fixture, options);\n  }\n\n  /** Gets the native DOM element corresponding to the given TestElement. */\n  static getNativeElement(el: TestElement): Element {\n    if (el instanceof UnitTestElement) {\n      return el.element;\n    }\n    throw Error('This TestElement was not created by the TestbedHarnessEnvironment');\n  }\n\n  /**\n   * Creates an instance of the given harness type, using the fixture's root element as the\n   * harness's host element. This method should be used when creating a harness for the root element\n   * of a fixture, as components do not have the correct selector when they are created as the root\n   * of the fixture.\n   */\n  static async harnessForFixture<T extends ComponentHarness>(\n      fixture: ComponentFixture<unknown>, harnessType: ComponentHarnessConstructor<T>,\n      options?: TestbedHarnessEnvironmentOptions): Promise<T> {\n    const environment = new TestbedHarnessEnvironment(fixture.nativeElement, fixture, options);\n    await environment.forceStabilize();\n    return environment.createComponentHarness(harnessType, fixture.nativeElement);\n  }\n\n  /**\n   * Flushes change detection and async tasks captured in the Angular zone.\n   * In most cases it should not be necessary to call this manually. However, there may be some edge\n   * cases where it is needed to fully flush animation events.\n   */\n  async forceStabilize(): Promise<void> {\n    if (!disableAutoChangeDetection) {\n      if (this._destroyed) {\n        throw Error('Harness is attempting to use a fixture that has already been destroyed.');\n      }\n\n      await detectChanges(this._fixture);\n    }\n  }\n\n  /**\n   * Waits for all scheduled or running async tasks to complete. This allows harness\n   * authors to wait for async tasks outside of the Angular zone.\n   */\n  async waitForTasksOutsideAngular(): Promise<void> {\n    // If we run in the fake async zone, we run \"flush\" to run any scheduled tasks. This\n    // ensures that the harnesses behave inside of the FakeAsyncTestZone similar to the\n    // \"AsyncTestZone\" and the root zone (i.e. neither fakeAsync or async). Note that we\n    // cannot just rely on the task state observable to become stable because the state will\n    // never change. This is because the task queue will be only drained if the fake async\n    // zone is being flushed.\n    if (isInFakeAsyncZone()) {\n      flush();\n    }\n\n    // Wait until the task queue has been drained and the zone is stable. Note that\n    // we cannot rely on \"fixture.whenStable\" since it does not catch tasks scheduled\n    // outside of the Angular zone. For test harnesses, we want to ensure that the\n    // app is fully stabilized and therefore need to use our own zone interceptor.\n    await this._taskState.pipe(takeWhile(state => !state.stable)).toPromise();\n  }\n\n  /** Gets the root element for the document. */\n  protected getDocumentRoot(): Element {\n    return document.body;\n  }\n\n  /** Creates a `TestElement` from a raw element. */\n  protected createTestElement(element: Element): TestElement {\n    return new UnitTestElement(element, () => this.forceStabilize());\n  }\n\n  /** Creates a `HarnessLoader` rooted at the given raw element. */\n  protected createEnvironment(element: Element): HarnessEnvironment<Element> {\n    return new TestbedHarnessEnvironment(element, this._fixture, this._options);\n  }\n\n  /**\n   * Gets a list of all elements matching the given selector under this environment's root element.\n   */\n  protected async getAllRawElements(selector: string): Promise<Element[]> {\n    await this.forceStabilize();\n    return Array.from(this._options.queryFn(selector, this.rawRootElement));\n  }\n}\n"]}