/** * @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 { parallel } from './change-detection'; import { ComponentHarness, HarnessPredicate, } from './component-harness'; /** * Base harness environment class that can be extended to allow `ComponentHarness`es to be used in * different test environments (e.g. testbed, protractor, etc.). This class implements the * functionality of both a `HarnessLoader` and `LocatorFactory`. This class is generic on the raw * element type, `E`, used by the particular test environment. */ export class HarnessEnvironment { constructor(rawRootElement) { this.rawRootElement = rawRootElement; this.rootElement = this.createTestElement(rawRootElement); } // Implemented as part of the `LocatorFactory` interface. documentRootLocatorFactory() { return this.createEnvironment(this.getDocumentRoot()); } // Implemented as part of the `LocatorFactory` interface. locatorFor(...queries) { return () => _assertResultFound(this._getAllHarnessesAndTestElements(queries), _getDescriptionForLocatorForQueries(queries)); } // Implemented as part of the `LocatorFactory` interface. locatorForOptional(...queries) { return () => __awaiter(this, void 0, void 0, function* () { return (yield this._getAllHarnessesAndTestElements(queries))[0] || null; }); } // Implemented as part of the `LocatorFactory` interface. locatorForAll(...queries) { return () => this._getAllHarnessesAndTestElements(queries); } // Implemented as part of the `LocatorFactory` interface. rootHarnessLoader() { return __awaiter(this, void 0, void 0, function* () { return this; }); } // Implemented as part of the `LocatorFactory` interface. harnessLoaderFor(selector) { return __awaiter(this, void 0, void 0, function* () { return this.createEnvironment(yield _assertResultFound(this.getAllRawElements(selector), [_getDescriptionForHarnessLoaderQuery(selector)])); }); } // Implemented as part of the `LocatorFactory` interface. harnessLoaderForOptional(selector) { return __awaiter(this, void 0, void 0, function* () { const elements = yield this.getAllRawElements(selector); return elements[0] ? this.createEnvironment(elements[0]) : null; }); } // Implemented as part of the `LocatorFactory` interface. harnessLoaderForAll(selector) { return __awaiter(this, void 0, void 0, function* () { const elements = yield this.getAllRawElements(selector); return elements.map(element => this.createEnvironment(element)); }); } // Implemented as part of the `HarnessLoader` interface. getHarness(query) { return this.locatorFor(query)(); } // Implemented as part of the `HarnessLoader` interface. getAllHarnesses(query) { return this.locatorForAll(query)(); } // Implemented as part of the `HarnessLoader` interface. getChildLoader(selector) { return __awaiter(this, void 0, void 0, function* () { return this.createEnvironment(yield _assertResultFound(this.getAllRawElements(selector), [_getDescriptionForHarnessLoaderQuery(selector)])); }); } // Implemented as part of the `HarnessLoader` interface. getAllChildLoaders(selector) { return __awaiter(this, void 0, void 0, function* () { return (yield this.getAllRawElements(selector)).map(e => this.createEnvironment(e)); }); } /** Creates a `ComponentHarness` for the given harness type with the given raw host element. */ createComponentHarness(harnessType, element) { return new harnessType(this.createEnvironment(element)); } /** * Matches the given raw elements with the given list of element and harness queries to produce a * list of matched harnesses and test elements. */ _getAllHarnessesAndTestElements(queries) { return __awaiter(this, void 0, void 0, function* () { const { allQueries, harnessQueries, elementQueries, harnessTypes } = _parseQueries(queries); // Combine all of the queries into one large comma-delimited selector and use it to get all raw // elements matching any of the individual queries. const rawElements = yield this.getAllRawElements([...elementQueries, ...harnessQueries.map(predicate => predicate.getSelector())].join(',')); // If every query is searching for the same harness subclass, we know every result corresponds // to an instance of that subclass. Likewise, if every query is for a `TestElement`, we know // every result corresponds to a `TestElement`. Otherwise we need to verify which result was // found by which selector so it can be matched to the appropriate instance. const skipSelectorCheck = (elementQueries.length === 0 && harnessTypes.size === 1) || harnessQueries.length === 0; const perElementMatches = yield parallel(() => rawElements.map((rawElement) => __awaiter(this, void 0, void 0, function* () { const testElement = this.createTestElement(rawElement); const allResultsForElement = yield parallel( // For each query, get `null` if it doesn't match, or a `TestElement` or // `ComponentHarness` as appropriate if it does match. This gives us everything that // matches the current raw element, but it may contain duplicate entries (e.g. // multiple `TestElement` or multiple `ComponentHarness` of the same type). () => allQueries.map(query => this._getQueryResultForElement(query, rawElement, testElement, skipSelectorCheck))); return _removeDuplicateQueryResults(allResultsForElement); }))); return [].concat(...perElementMatches); }); } /** * Check whether the given query matches the given element, if it does return the matched * `TestElement` or `ComponentHarness`, if it does not, return null. In cases where the caller * knows for sure that the query matches the element's selector, `skipSelectorCheck` can be used * to skip verification and optimize performance. */ _getQueryResultForElement(query, rawElement, testElement, skipSelectorCheck = false) { return __awaiter(this, void 0, void 0, function* () { if (typeof query === 'string') { return ((skipSelectorCheck || (yield testElement.matchesSelector(query))) ? testElement : null); } if (skipSelectorCheck || (yield testElement.matchesSelector(query.getSelector()))) { const harness = this.createComponentHarness(query.harnessType, rawElement); return (yield query.evaluate(harness)) ? harness : null; } return null; }); } } /** * Parses a list of queries in the format accepted by the `locatorFor*` methods into an easier to * work with format. */ function _parseQueries(queries) { const allQueries = []; const harnessQueries = []; const elementQueries = []; const harnessTypes = new Set(); for (const query of queries) { if (typeof query === 'string') { allQueries.push(query); elementQueries.push(query); } else { const predicate = query instanceof HarnessPredicate ? query : new HarnessPredicate(query, {}); allQueries.push(predicate); harnessQueries.push(predicate); harnessTypes.add(predicate.harnessType); } } return { allQueries, harnessQueries, elementQueries, harnessTypes }; } /** * Removes duplicate query results for a particular element. (e.g. multiple `TestElement` * instances or multiple instances of the same `ComponentHarness` class. */ function _removeDuplicateQueryResults(results) { return __awaiter(this, void 0, void 0, function* () { let testElementMatched = false; let matchedHarnessTypes = new Set(); const dedupedMatches = []; for (const result of results) { if (!result) { continue; } if (result instanceof ComponentHarness) { if (!matchedHarnessTypes.has(result.constructor)) { matchedHarnessTypes.add(result.constructor); dedupedMatches.push(result); } } else if (!testElementMatched) { testElementMatched = true; dedupedMatches.push(result); } } return dedupedMatches; }); } /** Verifies that there is at least one result in an array. */ function _assertResultFound(results, queryDescriptions) { return __awaiter(this, void 0, void 0, function* () { const result = (yield results)[0]; if (result == undefined) { throw Error(`Failed to find element matching one of the following queries:\n` + queryDescriptions.map(desc => `(${desc})`).join(',\n')); } return result; }); } /** Gets a list of description strings from a list of queries. */ function _getDescriptionForLocatorForQueries(queries) { return queries.map(query => typeof query === 'string' ? _getDescriptionForTestElementQuery(query) : _getDescriptionForComponentHarnessQuery(query)); } /** Gets a description string for a `ComponentHarness` query. */ function _getDescriptionForComponentHarnessQuery(query) { const harnessPredicate = query instanceof HarnessPredicate ? query : new HarnessPredicate(query, {}); const { name, hostSelector } = harnessPredicate.harnessType; const description = `${name} with host element matching selector: "${hostSelector}"`; const constraints = harnessPredicate.getDescription(); return description + (constraints ? ` satisfying the constraints: ${harnessPredicate.getDescription()}` : ''); } /** Gets a description string for a `TestElement` query. */ function _getDescriptionForTestElementQuery(selector) { return `TestElement for element matching selector: "${selector}"`; } /** Gets a description string for a `HarnessLoader` query. */ function _getDescriptionForHarnessLoaderQuery(selector) { return `HarnessLoader for element matching selector: "${selector}"`; } //# 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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 {parallel} from './change-detection';\nimport {\n  AsyncFactoryFn,\n  ComponentHarness,\n  ComponentHarnessConstructor,\n  HarnessLoader,\n  HarnessPredicate,\n  HarnessQuery,\n  LocatorFactory,\n  LocatorFnResult,\n} from './component-harness';\nimport {TestElement} from './test-element';\n\n/** Parsed form of the queries passed to the `locatorFor*` methods. */\ntype ParsedQueries<T extends ComponentHarness> = {\n  /** The full list of queries, in their original order. */\n  allQueries: (string | HarnessPredicate<T>)[],\n  /**\n   * A filtered view of `allQueries` containing only the queries that are looking for a\n   * `ComponentHarness`\n   */\n  harnessQueries: HarnessPredicate<T>[],\n  /**\n   * A filtered view of `allQueries` containing only the queries that are looking 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This class implements the\n * functionality of both a `HarnessLoader` and `LocatorFactory`. This class is generic on the raw\n * element type, `E`, used by the particular test environment.\n */\nexport abstract class HarnessEnvironment<E> implements HarnessLoader, LocatorFactory {\n  // Implemented as part of the `LocatorFactory` interface.\n  rootElement: TestElement;\n\n  protected constructor(protected rawRootElement: E) {\n    this.rootElement = this.createTestElement(rawRootElement);\n  }\n\n  // Implemented as part of the `LocatorFactory` interface.\n  documentRootLocatorFactory(): LocatorFactory {\n    return this.createEnvironment(this.getDocumentRoot());\n  }\n\n  // Implemented as part of the `LocatorFactory` interface.\n  locatorFor<T extends (HarnessQuery<any> | string)[]>(...queries: T):\n      AsyncFactoryFn<LocatorFnResult<T>> {\n    return () => _assertResultFound(\n        this._getAllHarnessesAndTestElements(queries),\n        _getDescriptionForLocatorForQueries(queries));\n  }\n\n  // Implemented as part of the `LocatorFactory` interface.\n  locatorForOptional<T extends (HarnessQuery<any> | string)[]>(...queries: T):\n      AsyncFactoryFn<LocatorFnResult<T> | null> {\n    return async () => (await this._getAllHarnessesAndTestElements(queries))[0] || null;\n  }\n\n  // Implemented as part of the `LocatorFactory` interface.\n  locatorForAll<T extends (HarnessQuery<any> | string)[]>(...queries: T):\n      AsyncFactoryFn<LocatorFnResult<T>[]> {\n    return () => this._getAllHarnessesAndTestElements(queries);\n  }\n\n  // Implemented as part of the `LocatorFactory` interface.\n  async rootHarnessLoader(): Promise<HarnessLoader> {\n    return this;\n  }\n\n  // Implemented as part of the `LocatorFactory` interface.\n  async harnessLoaderFor(selector: string): Promise<HarnessLoader> {\n    return this.createEnvironment(await _assertResultFound(this.getAllRawElements(selector),\n        [_getDescriptionForHarnessLoaderQuery(selector)]));\n  }\n\n  // Implemented as part of the `LocatorFactory` interface.\n  async harnessLoaderForOptional(selector: string): Promise<HarnessLoader | null> {\n    const elements = await this.getAllRawElements(selector);\n    return elements[0] ? this.createEnvironment(elements[0]) : null;\n  }\n\n  // Implemented as part of the `LocatorFactory` interface.\n  async harnessLoaderForAll(selector: string): Promise<HarnessLoader[]> {\n    const elements = await this.getAllRawElements(selector);\n    return elements.map(element => this.createEnvironment(element));\n  }\n\n  // Implemented as part of the `HarnessLoader` interface.\n  getHarness<T extends ComponentHarness>(query: HarnessQuery<T>): Promise<T> {\n    return this.locatorFor(query)();\n  }\n\n  // Implemented as part of the `HarnessLoader` interface.\n  getAllHarnesses<T extends ComponentHarness>(query: HarnessQuery<T>): Promise<T[]> {\n    return this.locatorForAll(query)();\n  }\n\n  // Implemented as part of the `HarnessLoader` interface.\n  async getChildLoader(selector: string): Promise<HarnessLoader> {\n    return this.createEnvironment(await _assertResultFound(this.getAllRawElements(selector),\n        [_getDescriptionForHarnessLoaderQuery(selector)]));\n  }\n\n  // Implemented as part of the `HarnessLoader` interface.\n  async getAllChildLoaders(selector: string): Promise<HarnessLoader[]> {\n    return (await this.getAllRawElements(selector)).map(e => this.createEnvironment(e));\n  }\n\n  /** Creates a `ComponentHarness` for the given harness type with the given raw host element. */\n  protected createComponentHarness<T extends ComponentHarness>(\n      harnessType: ComponentHarnessConstructor<T>, element: E): T {\n    return new harnessType(this.createEnvironment(element));\n  }\n\n  // Part of LocatorFactory interface, subclasses will implement.\n  abstract forceStabilize(): Promise<void>;\n\n  // Part of LocatorFactory interface, subclasses will implement.\n  abstract waitForTasksOutsideAngular(): Promise<void>;\n\n  /** Gets the root element for the document. */\n  protected abstract getDocumentRoot(): E;\n\n  /** Creates a `TestElement` from a raw element. */\n  protected abstract createTestElement(element: E): TestElement;\n\n  /** Creates a `HarnessLoader` rooted at the given raw element. */\n  protected abstract createEnvironment(element: E): HarnessEnvironment<E>;\n\n  /**\n   * Gets a list of all elements matching the given selector under this environment's root element.\n   */\n  protected abstract getAllRawElements(selector: string): Promise<E[]>;\n\n  /**\n   * Matches the given raw elements with the given list of element and harness queries to produce a\n   * list of matched harnesses and test elements.\n   */\n  private async _getAllHarnessesAndTestElements<T extends (HarnessQuery<any> | string)[]>(\n      queries: T): Promise<LocatorFnResult<T>[]> {\n    const {allQueries, harnessQueries, elementQueries, harnessTypes} = _parseQueries(queries);\n\n    // Combine all of the queries into one large comma-delimited selector and use it to get all raw\n    // elements matching any of the individual queries.\n    const rawElements = await this.getAllRawElements(\n        [...elementQueries, ...harnessQueries.map(predicate => predicate.getSelector())].join(','));\n\n    // If every query is searching for the same harness subclass, we know every result corresponds\n    // to an instance of that subclass. Likewise, if every query is for a `TestElement`, we know\n    // every result corresponds to a `TestElement`. Otherwise we need to verify which result was\n    // found by which selector so it can be matched to the appropriate instance.\n    const skipSelectorCheck = (elementQueries.length === 0 && harnessTypes.size === 1) ||\n        harnessQueries.length === 0;\n\n    const perElementMatches = await parallel(() => rawElements.map(async rawElement => {\n      const testElement = this.createTestElement(rawElement);\n      const allResultsForElement = await parallel(\n          // For each query, get `null` if it doesn't match, or a `TestElement` or\n          // `ComponentHarness` as appropriate if it does match. This gives us everything that\n          // matches the current raw element, but it may contain duplicate entries (e.g.\n          // multiple `TestElement` or multiple `ComponentHarness` of the same type).\n          () => allQueries.map(query => this._getQueryResultForElement(\n              query, rawElement, testElement, skipSelectorCheck)));\n      return _removeDuplicateQueryResults(allResultsForElement);\n    }));\n    return ([] as any).concat(...perElementMatches);\n  }\n\n  /**\n   * Check whether the given query matches the given element, if it does return the matched\n   * `TestElement` or `ComponentHarness`, if it does not, return null. In cases where the caller\n   * knows for sure that the query matches the element's selector, `skipSelectorCheck` can be used\n   * to skip verification and optimize performance.\n   */\n  private async _getQueryResultForElement<T extends ComponentHarness>(\n      query: string | HarnessPredicate<T>, rawElement: E, testElement: TestElement,\n      skipSelectorCheck: boolean = false): Promise<T | TestElement | null> {\n    if (typeof query === 'string') {\n      return ((skipSelectorCheck || await testElement.matchesSelector(query)) ? testElement : null);\n    }\n    if (skipSelectorCheck || await testElement.matchesSelector(query.getSelector())) {\n      const harness = this.createComponentHarness(query.harnessType, rawElement);\n      return (await query.evaluate(harness)) ? harness : null;\n    }\n    return null;\n  }\n}\n\n/**\n * Parses a list of queries in the format accepted by the `locatorFor*` methods into an easier to\n * work with format.\n */\nfunction _parseQueries<T extends (HarnessQuery<any> | string)[]>(queries: T):\n    ParsedQueries<LocatorFnResult<T> & ComponentHarness> {\n  const allQueries = [];\n  const harnessQueries = [];\n  const elementQueries = [];\n  const harnessTypes =\n      new Set<ComponentHarnessConstructor<LocatorFnResult<T> & ComponentHarness>>();\n\n  for (const query of queries) {\n    if (typeof query === 'string') {\n      allQueries.push(query);\n      elementQueries.push(query);\n    } else {\n      const predicate = query instanceof HarnessPredicate ? query : new HarnessPredicate(query, {});\n      allQueries.push(predicate);\n      harnessQueries.push(predicate);\n      harnessTypes.add(predicate.harnessType);\n    }\n  }\n\n  return {allQueries, harnessQueries, elementQueries, harnessTypes};\n}\n\n/**\n * Removes duplicate query results for a particular element. (e.g. multiple `TestElement`\n * instances or multiple instances of the same `ComponentHarness` class.\n */\nasync function _removeDuplicateQueryResults<T extends (ComponentHarness | TestElement | null)[]>(\n    results: T): Promise<T> {\n  let testElementMatched = false;\n  let matchedHarnessTypes = new Set();\n  const dedupedMatches = [];\n  for (const result of results) {\n    if (!result) {\n      continue;\n    }\n    if (result instanceof ComponentHarness) {\n      if (!matchedHarnessTypes.has(result.constructor)) {\n        matchedHarnessTypes.add(result.constructor);\n        dedupedMatches.push(result);\n      }\n    } else if (!testElementMatched) {\n      testElementMatched = true;\n      dedupedMatches.push(result);\n    }\n  }\n  return dedupedMatches as T;\n}\n\n/** Verifies that there is at least one result in an array. */\nasync function _assertResultFound<T>(results: Promise<T[]>, queryDescriptions: string[]):\n    Promise<T> {\n  const result = (await results)[0];\n  if (result == undefined) {\n    throw Error(`Failed to find element matching one of the following queries:\\n` +\n        queryDescriptions.map(desc => `(${desc})`).join(',\\n'));\n  }\n  return result;\n}\n\n/** Gets a list of description strings from a list of queries. */\nfunction _getDescriptionForLocatorForQueries(queries: (string | HarnessQuery<any>)[]) {\n  return queries.map(query => typeof query === 'string' ?\n      _getDescriptionForTestElementQuery(query) : _getDescriptionForComponentHarnessQuery(query));\n}\n\n/** Gets a description string for a `ComponentHarness` query. */\nfunction _getDescriptionForComponentHarnessQuery(query: HarnessQuery<any>) {\n  const harnessPredicate =\n      query instanceof HarnessPredicate ? query : new HarnessPredicate(query, {});\n  const {name, hostSelector} = harnessPredicate.harnessType;\n  const description = `${name} with host element matching selector: \"${hostSelector}\"`;\n  const constraints = harnessPredicate.getDescription();\n  return description + (constraints ?\n      ` satisfying the constraints: ${harnessPredicate.getDescription()}` : '');\n}\n\n/** Gets a description string for a `TestElement` query. */\nfunction _getDescriptionForTestElementQuery(selector: string) {\n  return `TestElement for element matching selector: \"${selector}\"`;\n}\n\n/** Gets a description string for a `HarnessLoader` query. */\nfunction _getDescriptionForHarnessLoaderQuery(selector: string) {\n  return `HarnessLoader for element matching selector: \"${selector}\"`;\n}\n"]}