Fluent interface to test INotifyPropertyChanged, MVVMLight messaging with composition

gistfile1.cs

        [Test]
        public void ValueRangeType_SetToAValueWithOneValueRangeValueSelected_ExpectPropertyChangedFiredValueSetAndModelChangedMessageSent()
        {
            //Arrange
            var viewModel = makeValueRangeViewModel();
            var valueViewModel = viewModel.AddValue("value");
            valueViewModel.IsSelected = true;

            //Act
            //Assert
            viewModel.Expect()
                     .FirePropertyChangedOn(vm => vm.ValueRangeType)
                     .SendingMessage<ModelChangedMessage>()
                     .HaveValueSetTo(vm => vm.ValueRangeType, ModelValueRangeType.Fix)
                     .When(vm => valueViewModel.Expect()
                                                       .FirePropertyChangedOn(v => v.NodeLabel)
                                                       .FirePropertyChangedOn(v => v.ValueField)
                                                       .FirePropertyChangedOn(v => v.IsDefaultValue)
                                                       .FirePropertyChangedOn(v => v.ModelTextId)
                                                       .FirePropertyChangedOn(v => v.ModelType)
                                                       .When(v => vm.ValueRangeType = ModelValueRangeType.Fix));
        }