public void AssignStandardBundleToEmployeeUsingMoq_EmployeeId_ReturnsCorrectEmployee() { var employeeId = Guid.NewGuid(); var testItem = new EquipmentItem { Name = "Test" }; var testBundle = new EquipmentBundle(); testBundle.Add(testItem); var bundleFactoryMock = new Mock <IEquipmentBundleFactory>(); bundleFactoryMock.Setup(x => x.CreateStandardBundle()).Returns(testBundle); var testEmployee = new Employee { EmployeeId = employeeId, Bundle = testBundle }; var employeeServiceMock = new Mock <IEmployeeService>(); employeeServiceMock.Setup(x => x.Connect(It.IsAny <Guid>(), It.IsAny <EquipmentBundle>())).Returns(testEmployee); var auditServiceMock = new Mock <IAuditService>(); var service = new EquipmentService(bundleFactoryMock.Object, employeeServiceMock.Object, auditServiceMock.Object); var result = service.AssignStandardBundleToEmployee(employeeId); Assert.Equal(employeeId, result.EmployeeId); Assert.Single(result.Bundle.Items); auditServiceMock.Verify(v => v.WriteEmployeeInfo(It.Is <Employee>(e => e == testEmployee))); }