@Test
public void test_getIdentityGroupDetails_failed() throws Exception {

    String group = "group1";
    String token = "test4ig8L3EpsJZSLAMg";
    when(OIDCUtil.getIdentityGroupDetails(group, token)).thenReturn(null);
    ResponseEntity<String> expectedResponseEntity = ResponseEntity.status(HttpStatus.NOT_FOUND).body("{\"errors\":[\"Group not found\"]}");
    ResponseEntity<String> actualResponse = oidcAuthService.getIdentityGroupDetails(group, token);
    assertEquals(expectedResponseEntity.getStatusCode(), actualResponse.getStatusCode());
    assertEquals(expectedResponseEntity.getBody(), actualResponse.getBody());
}