private static void OneTimeAssertions(MvxFullBinding binding, MockTargetBinding mockTarget, MockSourceBinding mockSource)
        {
            Assert.AreEqual(0, mockTarget.SubscribeToEventsCalled);

            Assert.AreEqual(1, mockTarget.Values.Count);
            Assert.AreEqual("TryGetValueValue", mockTarget.Values[0]);

            mockSource.TryGetValueValue = "SecondValue";
            mockSource.FireSourceChanged();
            Assert.AreEqual(1, mockTarget.Values.Count);

            mockSource.TryGetValueValue = "ThirdValue";
            mockSource.FireSourceChanged();
            Assert.AreEqual(1, mockTarget.Values.Count);

            Assert.AreEqual(0, mockSource.ValuesSet.Count);
            mockTarget.FireValueChanged(new MvxTargetChangedEventArgs("FromTarget1"));
            Assert.AreEqual(0, mockSource.ValuesSet.Count);
            mockTarget.FireValueChanged(new MvxTargetChangedEventArgs("FromTarget2"));
            Assert.AreEqual(0, mockSource.ValuesSet.Count);

            Assert.AreEqual(0, mockSource.DisposeCalled);
            Assert.AreEqual(0, mockTarget.DisposeCalled);

            binding.DataContext = new { ignored = 12 };
            Assert.AreEqual(1, mockSource.DisposeCalled);
            Assert.AreEqual(0, mockTarget.DisposeCalled);

            Assert.AreEqual(2, mockTarget.Values.Count);
            Assert.AreEqual("ThirdValue", mockTarget.Values[1]);

            binding.DataContext = new { ignored = 13 };
            Assert.AreEqual(2, mockSource.DisposeCalled);
            Assert.AreEqual(0, mockTarget.DisposeCalled);

            Assert.AreEqual(3, mockTarget.Values.Count);
            Assert.AreEqual("ThirdValue", mockTarget.Values[2]);

            mockSource.TryGetValueValue = "NewValue";
            mockSource.FireSourceChanged();
            Assert.AreEqual(3, mockTarget.Values.Count);

            mockTarget.FireValueChanged(new MvxTargetChangedEventArgs("FromTarget1"));
            Assert.AreEqual(0, mockSource.ValuesSet.Count);
            mockTarget.FireValueChanged(new MvxTargetChangedEventArgs("FromTarget2"));
            Assert.AreEqual(0, mockSource.ValuesSet.Count);

            binding.Dispose();
            Assert.AreEqual(3, mockSource.DisposeCalled);
            Assert.AreEqual(1, mockTarget.DisposeCalled);
        }
        private MvxFullBinding TestSetupCommon(IMvxValueConverter valueConverter, object converterParameter, object fallbackValue,
            Type targetType, out MockSourceBinding mockSource, out MockTargetBinding mockTarget)
        {
            ClearAll();
            MvxBindingSingletonCache.Initialize();

            var mockSourceBindingFactory = new Mock<IMvxSourceBindingFactory>();
            Ioc.RegisterSingleton(mockSourceBindingFactory.Object);

            var mockTargetBindingFactory = new Mock<IMvxTargetBindingFactory>();
            Ioc.RegisterSingleton(mockTargetBindingFactory.Object);

            var realSourceStepFactory = new MvxSourceStepFactory();
            realSourceStepFactory.AddOrOverwrite(typeof(MvxPathSourceStepDescription), new MvxPathSourceStepFactory());
            Ioc.RegisterSingleton<IMvxSourceStepFactory>(realSourceStepFactory);

            var sourceText = "sourceText";
            var targetName = "targetName";
            var source = new { Value = 1 };
            var target = new { Value = 2 };
            var bindingDescription = new MvxBindingDescription
            {
                Source = new MvxPathSourceStepDescription()
                {
                    Converter = valueConverter,
                    ConverterParameter = converterParameter,
                    FallbackValue = fallbackValue,
                    SourcePropertyPath = sourceText,
                },
                Mode = MvxBindingMode.TwoWay,
                TargetName = targetName
            };

            mockSource = new MockSourceBinding();
            mockTarget = new MockTargetBinding() { TargetType = targetType };
            mockTarget.DefaultMode = MvxBindingMode.TwoWay;

            var localSource = mockSource;
            mockSourceBindingFactory
                .Setup(x => x.CreateBinding(It.IsAny<object>(), It.Is<string>(s => s == sourceText)))
                .Returns((object a, string b) => localSource);
            var localTarget = mockTarget;
            mockTargetBindingFactory
                .Setup(x => x.CreateBinding(It.IsAny<object>(), It.Is<string>(s => s == targetName)))
                .Returns((object a, string b) => localTarget);

            mockSource.TryGetValueResult = true;
            mockSource.TryGetValueValue = "TryGetValueValue";

            var request = new MvxBindingRequest(source, target, bindingDescription);
            var toTest = new MvxFullBinding(request);
            return toTest;
        }
        private void TestCommon(MvxBindingMode bindingMode, bool expectSourceBinding, bool expectTargetBinding)
        {
            ClearAll();
            MvxBindingSingletonCache.Initialize();

            var mockSourceBindingFactory = new Mock<IMvxSourceBindingFactory>();
            Ioc.RegisterSingleton(mockSourceBindingFactory.Object);

            var mockTargetBindingFactory = new Mock<IMvxTargetBindingFactory>();
            Ioc.RegisterSingleton(mockTargetBindingFactory.Object);

            var realSourceStepFactory = new MvxSourceStepFactory();
            realSourceStepFactory.AddOrOverwrite(typeof(MvxPathSourceStepDescription), new MvxPathSourceStepFactory());
            Ioc.RegisterSingleton<IMvxSourceStepFactory>(realSourceStepFactory);

            var sourceText = "sourceText";
            var targetName = "targetName";
            var source = new { Value = 1 };
            var target = new { Value = 2 };
            var converterParameter = new { Value = 3 };
            var fallbackValue = new { Value = 4 };
            var converter = new Mock<IMvxValueConverter>();
            var bindingDescription = new MvxBindingDescription
            {
                Source = new MvxPathSourceStepDescription()
                {
                    Converter = converter.Object,
                    ConverterParameter = converterParameter,
                    FallbackValue = fallbackValue,
                    SourcePropertyPath = sourceText,
                },
                Mode = bindingMode,
                TargetName = targetName
            };

            var mockSourceBinding = new Mock<IMvxSourceBinding>();
            var mockTargetBinding = new Mock<IMvxTargetBinding>();

            mockSourceBindingFactory
                .Setup(x => x.CreateBinding(It.Is<object>(s => s == source), It.Is<string>(s => s == sourceText)))
                .Returns((object a, string b) => mockSourceBinding.Object);
            mockTargetBindingFactory
                .Setup(x => x.CreateBinding(It.Is<object>(s => s == target), It.Is<string>(s => s == targetName)))
                .Returns((object a, string b) => mockTargetBinding.Object);

            var request = new MvxBindingRequest(source, target, bindingDescription);

            var toTest = new MvxFullBinding(request);

            //var sourceBindingTimes = expectSourceBinding ? Times.Once() : Times.Never();
            //mockSourceBinding.Verify(x => x.Changed += It.IsAny<EventHandler<MvxSourcePropertyBindingEventArgs>>(), sourceBindingTimes);
            mockSourceBindingFactory
                .Verify(x => x.CreateBinding(It.Is<object>(s => s == source), It.Is<string>(s => s == sourceText)),
                        Times.Once());

            //var targetBindingTimes = expectSourceBinding ? Times.Once() : Times.Never();
            //mockTargetBinding.Verify(x => x.ValueChanged += It.IsAny<EventHandler<MvxTargetChangedEventArgs>>(), targetBindingTimes);
            mockTargetBindingFactory
                .Verify(x => x.CreateBinding(It.Is<object>(s => s == target), It.Is<string>(s => s == targetName)),
                        Times.Once());
        }