Function testPackage

integration/linker/link-packages-test.mjs:65–107

* Tests the specified package against the Angular linker plugin. * @param pkg Package being tested. * @returns An object containing linker failures and passed files.

(pkg)

 * @returns An object containing linker failures and passed files.
 */
function testPackage(pkg) {
  const entryPointFesmFiles = globSync(`fesm2022/**/*.mjs`, {cwd: pkg.pkgPath});
  const passedFiles = [];
  const failures = [];

  // Iterate through each entry point and confirm that all partial declarations can be linked
  // to their corresponding Angular definitions without errors.
  for (const fesmFileName of entryPointFesmFiles) {
    const diskFilePath = path.join(pkg.pkgPath, fesmFileName);
    const debugFileName = path.join(pkg.name, fesmFileName);
    const fileContent = fs.readFileSync(diskFilePath, 'utf8');
    const linkerPlugin = createEs2015LinkerPlugin({fileSystem, logger});

    // Babel throws errors if the transformation fails. We catch these so that we
    // can print incompatible entry points with their errors at the end.
    try {
      const {ast} = transformSync(fileContent, {
        ast: true,
        filename: diskFilePath,
        filenameRelative: debugFileName,
        plugins: [linkerPlugin],
      });

      // Naively check if there are any Angular declarations left that haven't been linked.
      traverse(ast, {
        Identifier: astPath => {
          if (astPath.node.name.startsWith('ɵɵngDeclare')) {
            throw astPath.buildCodeFrameError(
              'Found Angular declaration that has not been linked.',
              Error,
            );
          }
        },
      });

      passedFiles.push(debugFileName);
    } catch (error) {
      failures.push({debugFileName, error});
    }
  }

  return {passedFiles, failures};
}