Method setup

packages/language-service/testing/src/env.ts:27–63

()

export class LanguageServiceTestEnv {
  private static fsInitialized = false;
  static setup(): LanguageServiceTestEnv {
    let fs = getFileSystem();
    if (!(fs instanceof MockFileSystem)) {
      initMockFileSystem('Native');
      fs = getFileSystem();
    }

    if (!LanguageServiceTestEnv.fsInitialized) {
      (fs as MockFileSystem).init(
        loadStandardTestFiles({
          fakeCommon: true,
          rxjs: true,
        }),
      );

      lockMockFileSystem();
      LanguageServiceTestEnv.fsInitialized = true;
    }

    const host = new MockServerHost();

    const projectService = new ts.server.ProjectService({
      logger,
      cancellationToken: ts.server.nullCancellationToken,
      host,
      documentRegistry: ts.createDocumentRegistry(
        host.useCaseSensitiveFileNames,
        host.getCurrentDirectory(),
      ),
      typingsInstaller: ts.server.nullTypingsInstaller,
      session: undefined,
      useInferredProjectPerProjectRoot: true,
      useSingleInferredProject: true,
    } as unknown as ts.server.ProjectServiceOptions);

    return new LanguageServiceTestEnv(host, projectService);
  }

  private projects = new Map<string, Project>();
  private projectFiles = new Map<string, Set<string>>();