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