@Test
  public void when_token_response_contain_null_scope_return_null_as_scope() throws Exception {
    // GIVEN
    String tokenContent =
        "{\"tokenType\":\"599\","
            + "\"accessToken\":\"da96c8141bcda91be65db4adbc8fafe77d116c88caacb8de404c0654c16c6620\","
            + "\"expiresIn\":\"Bearer\",\"userId\":null,"
            + "\"refreshToken\":\"cb2e2e068447913d0c97f79f888f6e2882bfcb569325a9ad9e9b52937b06e547\"}";

    // WHEN
    String tokenScope = AccessTokenValidator.extractTokenScope(tokenContent);

    // THEN
    assertNull(tokenScope);
  }