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@ngneat/spectator

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A powerful tool to simplify your Angular tests

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import { ChangeDetectorRef } from '@angular/core'; import { DeferBlockState } from '@angular/core/testing'; import { DomSpectator } from '../base/dom-spectator'; import { setProps } from '../internals/query'; /** * @publicApi */ export class Spectator extends DomSpectator { constructor(fixture, debugElement, instance, element) { super(fixture, debugElement, instance, element); this.fixture = fixture; this.debugElement = debugElement; this.instance = instance; this.element = element; } get component() { return this.instance; } inject(token, fromComponentInjector = false) { if (fromComponentInjector) { return this.debugElement.injector.get(token); } return super.inject(token); } detectComponentChanges() { if (this.debugElement) { this.debugElement.injector.get(ChangeDetectorRef).detectChanges(); } else { this.detectChanges(); } } setInput(input, value) { setProps(this.fixture.componentRef, input, value); // Force cd on the host component for cases such as: https://github.com/ngneat/spectator/issues/539 this.detectChanges(); // Force cd on the tested component this.debugElement.injector.get(ChangeDetectorRef).detectChanges(); } deferBlock(deferBlockIndex = 0) { return this._deferBlocksForGivenFixture(deferBlockIndex, this.fixture.getDeferBlocks()); } /** * * @param deferBlockFixtures Defer block fixture * @returns deferBlock object with methods to access the defer blocks */ _deferBlocksForGivenFixture(deferBlockIndex = 0, deferBlockFixtures) { return { renderComplete: async () => { const renderedDeferFixture = await this._renderDeferStateAndGetFixture(DeferBlockState.Complete, deferBlockIndex, deferBlockFixtures); return this._childrenDeferFixtures(renderedDeferFixture); }, renderPlaceholder: async () => { const renderedDeferFixture = await this._renderDeferStateAndGetFixture(DeferBlockState.Placeholder, deferBlockIndex, deferBlockFixtures); return this._childrenDeferFixtures(renderedDeferFixture); }, renderLoading: async () => { const renderedDeferFixture = await this._renderDeferStateAndGetFixture(DeferBlockState.Loading, deferBlockIndex, deferBlockFixtures); return this._childrenDeferFixtures(renderedDeferFixture); }, renderError: async () => { const renderedDeferFixture = await this._renderDeferStateAndGetFixture(DeferBlockState.Error, deferBlockIndex, deferBlockFixtures); return this._childrenDeferFixtures(renderedDeferFixture); }, }; } /** * Renders the given defer block state and returns the defer block fixture * * @param deferBlockState complete, placeholder, loading or error * @param deferBlockIndex index of the defer block to render * @param deferBlockFixtures Defer block fixture * @returns Defer block fixture */ async _renderDeferStateAndGetFixture(deferBlockState, deferBlockIndex = 0, deferBlockFixtures) { const deferFixture = (await deferBlockFixtures)[deferBlockIndex]; await deferFixture.render(deferBlockState); return deferFixture; } /** * * @param deferFixture Defer block fixture * @returns deferBlock object with methods to access the nested defer blocks */ _childrenDeferFixtures(deferFixture) { return { deferBlock: (deferBlockIndex = 0) => this._deferBlocksForGivenFixture(deferBlockIndex, deferFixture.getDeferBlocks()), }; } } //# 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{ ChangeDetectorRef, DebugElement } from '@angular/core';\nimport { ComponentFixture, DeferBlockFixture, DeferBlockState } from '@angular/core/testing';\n\nimport { DomSpectator } from '../base/dom-spectator';\nimport { setProps } from '../internals/query';\nimport { SpyObject } from '../mock';\nimport { Token } from '../token';\nimport { DeferBlocks, InferInputSignal, InferInputSignals, NestedDeferBlocks } from '../types';\n\n/**\n * @publicApi\n */\nexport class Spectator<C> extends DomSpectator<C> {\n  constructor(\n    public fixture: ComponentFixture<C>,\n    public debugElement: DebugElement,\n    protected instance: C,\n    public element: HTMLElement,\n  ) {\n    super(fixture, debugElement, instance, element);\n  }\n\n  public get component(): C {\n    return this.instance;\n  }\n\n  public inject<T>(token: Token<T>, fromComponentInjector: boolean = false): SpyObject<T> {\n    if (fromComponentInjector) {\n      return this.debugElement.injector.get(token) as SpyObject<T>;\n    }\n\n    return super.inject(token);\n  }\n\n  public detectComponentChanges(): void {\n    if (this.debugElement) {\n      this.debugElement.injector.get(ChangeDetectorRef).detectChanges();\n    } else {\n      this.detectChanges();\n    }\n  }\n\n  public setInput<K extends keyof C>(input: InferInputSignals<C>): void;\n  public setInput<K extends keyof C>(input: K, inputValue: InferInputSignal<C[K]>): void;\n  public setInput(input: string, inputValue: unknown): void;\n  public setInput(input: any, value?: any): void {\n    setProps(this.fixture.componentRef, input, value);\n    // Force cd on the host component for cases such as: https://github.com/ngneat/spectator/issues/539\n    this.detectChanges();\n\n    // Force cd on the tested component\n    this.debugElement.injector.get(ChangeDetectorRef).detectChanges();\n  }\n\n  public deferBlock(deferBlockIndex = 0): DeferBlocks {\n    return this._deferBlocksForGivenFixture(deferBlockIndex, this.fixture.getDeferBlocks());\n  }\n\n  /**\n   *\n   * @param deferBlockFixtures Defer block fixture\n   * @returns deferBlock object with methods to access the defer blocks\n   */\n  private _deferBlocksForGivenFixture(deferBlockIndex = 0, deferBlockFixtures: Promise<DeferBlockFixture[]>): DeferBlocks {\n    return {\n      renderComplete: async () => {\n        const renderedDeferFixture = await this._renderDeferStateAndGetFixture(\n          DeferBlockState.Complete,\n          deferBlockIndex,\n          deferBlockFixtures,\n        );\n\n        return this._childrenDeferFixtures(renderedDeferFixture);\n      },\n      renderPlaceholder: async () => {\n        const renderedDeferFixture = await this._renderDeferStateAndGetFixture(\n          DeferBlockState.Placeholder,\n          deferBlockIndex,\n          deferBlockFixtures,\n        );\n\n        return this._childrenDeferFixtures(renderedDeferFixture);\n      },\n      renderLoading: async () => {\n        const renderedDeferFixture = await this._renderDeferStateAndGetFixture(\n          DeferBlockState.Loading,\n          deferBlockIndex,\n          deferBlockFixtures,\n        );\n\n        return this._childrenDeferFixtures(renderedDeferFixture);\n      },\n      renderError: async () => {\n        const renderedDeferFixture = await this._renderDeferStateAndGetFixture(DeferBlockState.Error, deferBlockIndex, deferBlockFixtures);\n\n        return this._childrenDeferFixtures(renderedDeferFixture);\n      },\n    };\n  }\n\n  /**\n   * Renders the given defer block state and returns the defer block fixture\n   *\n   * @param deferBlockState complete, placeholder, loading or error\n   * @param deferBlockIndex index of the defer block to render\n   * @param deferBlockFixtures Defer block fixture\n   * @returns Defer block fixture\n   */\n  private async _renderDeferStateAndGetFixture(\n    deferBlockState: DeferBlockState,\n    deferBlockIndex = 0,\n    deferBlockFixtures: Promise<DeferBlockFixture[]>,\n  ): Promise<DeferBlockFixture> {\n    const deferFixture = (await deferBlockFixtures)[deferBlockIndex];\n\n    await deferFixture.render(deferBlockState);\n\n    return deferFixture;\n  }\n\n  /**\n   *\n   * @param deferFixture Defer block fixture\n   * @returns deferBlock object with methods to access the nested defer blocks\n   */\n  private _childrenDeferFixtures(deferFixture: DeferBlockFixture): NestedDeferBlocks {\n    return {\n      deferBlock: (deferBlockIndex = 0) => this._deferBlocksForGivenFixture(deferBlockIndex, deferFixture.getDeferBlocks()),\n    };\n  }\n}\n"]}