@Test
public void givenBlacklistEmployee_whenSubmitTaxForm_thenResponseFails() throws JsonProcessingException {

    when(specialEmployeesServiceMock.isEmployeeBlacklisted(employeeId)).thenReturn(true);
    ResponseEntity<JsonNode> response = taxController.submitTaxForm(taxTo);
    assertThat(response.getStatusCode()).isEqualTo(HttpStatus.INTERNAL_SERVER_ERROR);
    assertThat(response.getBody().get("status").asText()).isEqualTo(TaxController.RESPONSE_BODY_FAIL);
}