TypeScript expect.setState函數代碼示例

export default ({
  config,
  globalConfig,
  localRequire,
  testPath,
}: SetupOptions) => {
  // Jest tests snapshotSerializers in order preceding built-in serializers.
  // Therefore, add in reverse because the last added is the first tested.
  config.snapshotSerializers
    .concat()
    .reverse()
    .forEach(path => {
      addSerializer(localRequire(path));
    });

  patchJasmine();
  const {expand, updateSnapshot} = globalConfig;
  const snapshotResolver = buildSnapshotResolver(config);
  const snapshotPath = snapshotResolver.resolveSnapshotPath(testPath);
  const snapshotState = new SnapshotState(snapshotPath, {
    expand,
    getBabelTraverse: () => require('@babel/traverse').default,
    getPrettier: () =>
      config.prettierPath ? require(config.prettierPath) : null,
    updateSnapshot,
  });
  setState({snapshotState, testPath});
  // Return it back to the outer scope (test runner outside the VM).
  return snapshotState;
};

const _addSuppressedErrors = (test: Circus.TestEntry) => {
  const {suppressedErrors} = getState();
  setState({suppressedErrors: []});
  if (suppressedErrors.length) {
    test.errors = test.errors.concat(suppressedErrors);
  }
};

const eventHandler = (event: Circus.Event) => {
  switch (event.name) {
    case 'test_start': {
      setState({currentTestName: getTestID(event.test)});
      break;
    }
    case 'test_done': {
      _addSuppressedErrors(event.test);
      _addExpectedAssertionErrors(event.test);
      break;
    }
  }
};

export default (config: {expand: boolean}) => {
  global.expect = expect;
  expect.setState({
    expand: config.expand,
  });
  expect.extend({
    toMatchInlineSnapshot,
    toMatchSnapshot,
    toThrowErrorMatchingInlineSnapshot,
    toThrowErrorMatchingSnapshot,
  });

  expect.addSnapshotSerializer = addSerializer;
};

export default (config: {expand: boolean}) => {
  global.expect = expect;
  expect.setState({expand: config.expand});
  expect.extend({
    toMatchInlineSnapshot,
    toMatchSnapshot,
    toThrowErrorMatchingInlineSnapshot,
    toThrowErrorMatchingSnapshot,
  });
  expect.addSnapshotSerializer = addSerializer;

  const jasmine = global.jasmine as Jasmine;
  jasmine.anything = expect.anything;
  jasmine.any = expect.any;
  jasmine.objectContaining = expect.objectContaining;
  jasmine.arrayContaining = expect.arrayContaining;
  jasmine.stringMatching = expect.stringMatching;

  jasmine.addMatchers = (jasmineMatchersObject: JasmineMatchersObject) => {
    const jestMatchersObject = Object.create(null);
    Object.keys(jasmineMatchersObject).forEach(name => {
      jestMatchersObject[name] = function(
        this: MatcherState,
        ...args: Array<unknown>
      ): RawMatcherFn {
        // use "expect.extend" if you need to use equality testers (via this.equal)
        const result = jasmineMatchersObject[name](null, null);
        // if there is no 'negativeCompare', both should be handled by `compare`
        const negativeCompare = result.negativeCompare || result.compare;

        return this.isNot
          ? negativeCompare.apply(
              null,
              // @ts-ignore
              args,
            )
          : result.compare.apply(
              null,
              // @ts-ignore
              args,
            );
      };
    });

    const expect = global.expect;
    expect.extend(jestMatchersObject);
  };
};

const addSuppressedErrors = (result: SpecResult) => {
  const {suppressedErrors} = getState();
  setState({suppressedErrors: []});
  if (suppressedErrors.length) {
    result.status = 'failed';

    result.failedExpectations = suppressedErrors.map(error => ({
      actual: '',
      // passing error for custom test reporters
      error,
      expected: '',
      matcherName: '',
      message: error.message,
      passed: false,
      stack: error.stack,
    }));
  }
};

 attr.onStart = (context: JasmineSpec) => {
   setState({currentTestName: context.getFullName()});
   onStart && onStart.call(attr, context);
 };

export const initialize = ({
  config,
  environment,
  getPrettier,
  getBabelTraverse,
  globalConfig,
  localRequire,
  parentProcess,
  testPath,
}: {
  config: Config.ProjectConfig;
  environment: JestEnvironment;
  getPrettier: () => null | any;
  getBabelTraverse: () => Function;
  globalConfig: Config.GlobalConfig;
  localRequire: (path: Config.Path) => any;
  testPath: Config.Path;
  parentProcess: Process;
}) => {
  const mutex = throat(globalConfig.maxConcurrency);

  Object.assign(global, globals);

  global.xit = global.it.skip;
  global.xtest = global.it.skip;
  global.xdescribe = global.describe.skip;
  global.fit = global.it.only;
  global.fdescribe = global.describe.only;

  global.test.concurrent = (test => {
    const concurrent = (
      testName: string,
      testFn: () => Promise<any>,
      timeout?: number,
    ) => {
      // For concurrent tests we first run the function that returns promise, and then register a
      // nomral test that will be waiting on the returned promise (when we start the test, the promise
      // will already be in the process of execution).
      // Unfortunately at this stage there's no way to know if there are any `.only` tests in the suite
      // that will result in this test to be skipped, so we'll be executing the promise function anyway,
      // even if it ends up being skipped.
      const promise = mutex(() => testFn());
      global.test(testName, () => promise, timeout);
    };

    concurrent.only = (
      testName: string,
      testFn: () => Promise<any>,
      timeout?: number,
    ) => {
      const promise = mutex(() => testFn());
      // eslint-disable-next-line jest/no-focused-tests
      test.only(testName, () => promise, timeout);
    };

    concurrent.skip = test.skip;

    return concurrent;
  })(global.test);

  addEventHandler(eventHandler);

  if (environment.handleTestEvent) {
    addEventHandler(environment.handleTestEvent.bind(environment));
  }

  dispatch({
    name: 'setup',
    parentProcess,
    testNamePattern: globalConfig.testNamePattern,
  });

  if (config.testLocationInResults) {
    dispatch({
      name: 'include_test_location_in_result',
    });
  }

  // Jest tests snapshotSerializers in order preceding built-in serializers.
  // Therefore, add in reverse because the last added is the first tested.
  config.snapshotSerializers
    .concat()
    .reverse()
    .forEach(path => {
      addSerializer(localRequire(path));
    });

  const {expand, updateSnapshot} = globalConfig;
  const snapshotResolver = buildSnapshotResolver(config);
  const snapshotPath = snapshotResolver.resolveSnapshotPath(testPath);
  const snapshotState = new SnapshotState(snapshotPath, {
    expand,
    getBabelTraverse,
    getPrettier,
    updateSnapshot,
  });
  setState({snapshotState, testPath});

  // Return it back to the outer scope (test runner outside the VM).
  return {globals, snapshotState};
//.........這裏部分代碼省略.........