@BeforeEach
  public void setUp() {
    client = new OkHttpClient.Builder().build();
    mapper = new ObjectMapper();
    transformerService = new TransformerServiceImpl();
    token = new TokensAndUrlAuthData("token123", "refreshToken", "tokenUrl");
    server = new MockWebServer();
  }
Verifies Calendar export using mock HTTP endpoints that replay responses from the Microsoft Graph
API.
extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/integration/MicrosoftCalendarExportTest.java