public async Task GetUserPreviousAdministrations_Valid_Test()
{
// Arrange
_cityParticipantsService
.Setup(c => c.GetPreviousAdministrationsOfUserAsync(It.IsAny <string>()))
.ReturnsAsync(It.IsAny <IEnumerable <CityAdministrationDTO> >());
CitiesController citycon = CreateCityController;
// Act
var result = await citycon.GetUserPreviousAdministrations(GetStringFakeId());
// Assert
Assert.NotNull(result);
Assert.IsInstanceOf <OkObjectResult>(result);
}