public async Task DeleteAsync_UnknownIdPassed_ThrowAnException() { // Arrange int businessId = 11; _repositoryMock .Setup(rep => rep.GetByIdAsync(businessId)) .ReturnsAsync(TestData.GetBusinessById(businessId)); // Act var exception = await Assert.ThrowsAsync <Exception>(() => _businessService.DeleteAsync(businessId)); // Assert Assert.NotNull(exception); }