Function defineJasmineTestCases

src/cdk/schematics/testing/test-case-setup.ts:178–218

(
  versionName: string,
  collectionFile: string,
  inputFiles: string[] | undefined,
)

 * spec definitions. This should be used within a "describe" jasmine closure.
 */
export function defineJasmineTestCases(
  versionName: string,
  collectionFile: string,
  inputFiles: string[] | undefined,
) {
  // No test cases for the given version are available. Skip setting up tests for that
  // version.
  if (!inputFiles) {
    // Jasmine throws an error if there's a `describe` without any tests.
    it('should pass', () => {});
    return;
  }

  let appTree: UnitTestTree;
  let testCasesOutputPath: string;

  beforeAll(async () => {
    const {appTree: _tree, runFixers} = await createTestCaseSetup(
      `migration-${versionName}`,
      collectionFile,
      inputFiles,
    );

    await runFixers();

    appTree = _tree;
    testCasesOutputPath = '/projects/cdk-testing/src/test-cases/';
  });

  // Iterates through every test case directory and generates a jasmine test block that will
  // verify that the update schematics properly updated the test input to the expected output.
  inputFiles.forEach(inputFile => {
    const inputTestName = basename(inputFile, extname(inputFile));

    it(`should apply update schematics to test case: ${inputTestName}`, () => {
      expect(appTree.readContent(join(testCasesOutputPath, `${inputTestName}.ts`))).toBe(
        readFileContent(inputFile.replace(TEST_CASE_INPUT_SUFFIX, TEST_CASE_OUTPUT_SUFFIX)),
      );
    });
  });
}

/**
 * Patches the specified virtual file system tree to be able to read the TypeScript