public async void CancelPartnerPromoCodeLimitAsync_PartnerIsNotFound_ReturnsNotFound()
{
// Arrange
var partnerId = Guid.Parse("def47943-7aaf-44a1-ae21-05aa4948b165");
Partner partner = null;
_partnersRepositoryMock.Setup(repo => repo.GetByIdAsync(partnerId)).ReturnsAsync(partner);
// Act
var result = await _partnersController.CancelPartnerPromoCodeLimitAsync(partnerId);
// Assert
result.Should().BeAssignableTo <NotFoundResult>();
}