public void GivenDeletingStudentGrade_WhenDeleting_ThenCorrespondingStudentGradeIsDeleted() { // Arrange var testStudent = new Student("OliCreationTest", "test") { Id = 1, Grades = new List <Grade> { new Grade { Subject = "Maths" } } }; DeleteStudentGradeMessage request = null; DeleteStudentGradeReplyMessage reply = null; var queryCountWrapper = new Mock <IQueryCountWrapper>(); queryCountWrapper.SetupGet(qcw => qcw.QueryCount).Returns(0); var bus = new Mock <IBus>(MockBehavior.Strict); bus .Setup(b => b.SendRequest <DeleteStudentGradeMessage, DeleteStudentGradeReplyMessage> (It.IsAny <string>(), It.IsAny <DeleteStudentGradeMessage>(), null, It.IsAny <int>())) .Returns <string, DeleteStudentGradeMessage, Dictionary <string, string>, int>( (endpoint, message, headers, timeout) => { request = message; reply = new DeleteStudentGradeReplyMessage(message.CorrelationId); return(reply); }); var claimsHelper = new Mock <IClaimsHelper>(MockBehavior.Strict); var controller = new StudentController(bus.Object, claimsHelper.Object, queryCountWrapper.Object); // Act var result = controller.DeleteStudentGrade((int)testStudent.Id, "Maths"); var okObjectResult = result as ObjectResult; // Assert Assert.Equal(reply.CorrelationId, okObjectResult.Value); }