public async Task When_SendPendingEmailsIsCalled_AndThereAreTwoPendingEmails_Then_EmailSenderServiceCallsGetPendingEmailsTwice() { // Given _emailsRepositoryMock .Setup(mock => mock.GetPendingEmails()) .ReturnsAsync(new ActionResponse <IEnumerable <EmailDto> >(new List <EmailDto> { _emailDtoStub, _emailDtoStub }, SuccessResponseMessage)); var controller = new MailingController(_emailsRepositoryMock.Object, _emailSenderServiceMock.Object); // When await controller.SendPendingEmails(); // Then _emailSenderServiceMock.Verify(mock => mock.Send( It.IsAny <string>(), It.IsAny <IEnumerable <string> >(), It.IsAny <string>(), It.IsAny <string>()), Times.Exactly(2)); }