Ejemplo n.º 1
0
        public void StringFormatOneWayToSource()
        {
            var property = BindableProperty.Create("Foo", typeof(string), typeof(MockBindable));
            var binding  = CreateBinding(BindingMode.OneWayToSource, "Foo {0}");

            var vm = new MockViewModel {
                Text = "Bar"
            };
            var bo = new MockBindable {
                BindingContext = vm
            };

            bo.SetBinding(property, binding);

            bo.SetValue(property, "Bar");

            Assert.That(vm.Text, Is.EqualTo("Bar"));
        }
Ejemplo n.º 2
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        public void StringFormatOnUpdate()
        {
            var property = BindableProperty.Create("Foo", typeof(string), typeof(MockBindable));
            var binding  = CreateBinding(BindingMode.Default, "Foo {0}");

            var vm = new MockViewModel {
                Text = "Bar"
            };
            var bo = new MockBindable {
                BindingContext = vm
            };

            bo.SetBinding(property, binding);

            vm.Text = "Baz";

            Assert.That(bo.GetValue(property), Is.EqualTo("Foo Baz"));
        }
Ejemplo n.º 3
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        public void ValueUpdatedWithSimplePathOnTwoWayBinding(
            [Values(true, false)] bool isDefault)
        {
            const string newvalue  = "New Value";
            var          viewmodel = new MockViewModel
            {
                Text = "Foo"
            };

            BindingMode propertyDefault = BindingMode.OneWay;
            BindingMode bindingMode     = BindingMode.TwoWay;

            if (isDefault)
            {
                propertyDefault = BindingMode.TwoWay;
                bindingMode     = BindingMode.Default;
            }

            var property = BindableProperty.Create("Text", typeof(string), typeof(MockBindable), "default value", propertyDefault);
            var binding  = CreateBinding(bindingMode);

            var bindable = new MockBindable();

            bindable.BindingContext = viewmodel;
            bindable.SetBinding(property, binding);

            viewmodel.Text = newvalue;
            Assert.AreEqual(newvalue, bindable.GetValue(property),
                            "Target property did not update change");
            Assert.AreEqual(newvalue, viewmodel.Text,
                            "Source property changed from what it was set to");

            const string newvalue2 = "New Value in the other direction";

            bindable.SetValue(property, newvalue2);
            Assert.AreEqual(newvalue2, viewmodel.Text,
                            "Source property did not update with Target's change");
            Assert.AreEqual(newvalue2, bindable.GetValue(property),
                            "Target property changed from what it was set to");
            var messages = MockApplication.MockLogger.Messages;

            Assert.That(messages.Count, Is.EqualTo(0),
                        "An error was logged: " + messages.FirstOrDefault());
        }
Ejemplo n.º 4
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        public void ValueSetOnTwoWay(
            [Values(true, false)] bool setContextFirst,
            [Values(true, false)] bool isDefault)
        {
            const string value     = "Foo";
            var          viewmodel = new MockViewModel
            {
                Text = value
            };

            BindingMode propertyDefault = BindingMode.OneWay;
            BindingMode bindingMode     = BindingMode.TwoWay;

            if (isDefault)
            {
                propertyDefault = BindingMode.TwoWay;
                bindingMode     = BindingMode.Default;
            }

            var property = BindableProperty.Create("Text", typeof(string), typeof(MockBindable), defaultValue: "default value", defaultBindingMode: propertyDefault);
            var binding  = CreateBinding(bindingMode);

            var bindable = new MockBindable();

            if (setContextFirst)
            {
                bindable.BindingContext = viewmodel;
                bindable.SetBinding(property, binding);
            }
            else
            {
                bindable.SetBinding(property, binding);
                bindable.BindingContext = viewmodel;
            }

            Assert.AreEqual(value, viewmodel.Text,
                            "BindingContext property changed");
            Assert.AreEqual(value, bindable.GetValue(property),
                            "Target property did not change");
            var messages = MockApplication.MockLogger.Messages;

            Assert.That(messages.Count, Is.EqualTo(0),
                        "An error was logged: " + messages.FirstOrDefault());
        }
Ejemplo n.º 5
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        public void ValueUpdatedWithSimplePathOnOneWayToSourceBinding(
            [Values(true, false)] bool isDefault)

        {
            const string newvalue  = "New Value";
            var          viewmodel = new MockViewModel
            {
                Text = "Foo"
            };

            BindingMode propertyDefault = BindingMode.OneWay;
            BindingMode bindingMode     = BindingMode.OneWayToSource;

            if (isDefault)
            {
                propertyDefault = BindingMode.OneWayToSource;
                bindingMode     = BindingMode.Default;
            }

            var property = BindableProperty.Create("Text", typeof(string), typeof(MockBindable), "default value", propertyDefault);
            var binding  = CreateBinding(bindingMode);

            var bindable = new MockBindable();

            bindable.BindingContext = viewmodel;
            bindable.SetBinding(property, binding);

            string       original = (string)bindable.GetValue(property);
            const string value    = "value";

            viewmodel.Text = value;
            Assert.AreEqual(original, bindable.GetValue(property),
                            "Target updated from Source on OneWayToSource");

            bindable.SetValue(property, newvalue);
            Assert.AreEqual(newvalue, bindable.GetValue(property),
                            "Bindable did not update on binding context property change");
            Assert.AreEqual(newvalue, viewmodel.Text,
                            "Source property changed when it shouldn't");
            Assert.That(log.Messages.Count, Is.EqualTo(0),
                        "An error was logged: " + log.Messages.FirstOrDefault());
        }
Ejemplo n.º 6
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        public void ValueUpdatedWithOldContextDoesNotUpdateWithTwoWayBinding(bool isDefault)
        {
            const string newvalue  = "New Value";
            var          viewmodel = new MockViewModel
            {
                Text = "Foo"
            };

            BindingMode propertyDefault = BindingMode.OneWay;
            BindingMode bindingMode     = BindingMode.TwoWay;

            if (isDefault)
            {
                propertyDefault = BindingMode.TwoWay;
                bindingMode     = BindingMode.Default;
            }

            var property = BindableProperty.Create("Text", typeof(string), typeof(MockBindable), "default value", propertyDefault);
            var binding  = CreateBinding(bindingMode);

            var bindable = new MockBindable();

            bindable.BindingContext = viewmodel;
            bindable.SetBinding(property, binding);

            bindable.BindingContext = new MockViewModel();
            Assert.AreEqual(null, bindable.GetValue(property));

            viewmodel.Text = newvalue;
            Assert.AreEqual(null, bindable.GetValue(property),
                            "Target updated from old Source property change");

            string original = viewmodel.Text;

            bindable.SetValue(property, newvalue);
            Assert.AreEqual(original, viewmodel.Text,
                            "Source updated from old Target property change");
            var messages = MockApplication.MockLogger.Messages;

            Assert.That(messages.Count, Is.EqualTo(0),
                        "An error was logged: " + messages.FirstOrDefault());
        }
Ejemplo n.º 7
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        public void PropertyChangeBindingsOccurThroughMainThread()
        {
            var vm = new MockViewModel {
                Text = "text"
            };

            var bindable = new MockBindable();
            var binding  = CreateBinding();

            bindable.BindingContext = vm;
            bindable.SetBinding(MockBindable.TextProperty, binding);

            bool invokeOnMainThreadWasCalled = false;

            Device.PlatformServices = new MockPlatformServices(a => invokeOnMainThreadWasCalled = true, isInvokeRequired: true);

            vm.Text = "updated";

            // If we wait five seconds and invokeOnMainThreadWasCalled still hasn't been set, something is very wrong
            Assert.That(invokeOnMainThreadWasCalled, Is.True.After(5000, 10));
        }
Ejemplo n.º 8
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        public void ReuseBindingInstance()
        {
            var vm = new MockViewModel();

            var bindable = new MockBindable();

            bindable.BindingContext = vm;

            var property = BindableProperty.Create("Foo", typeof(string), typeof(MockBindable));
            var binding  = new Binding("Text");

            bindable.SetBinding(property, binding);

            var bindable2 = new MockBindable();

            bindable2.BindingContext = new MockViewModel();
            Assert.Throws <InvalidOperationException>(() => bindable2.SetBinding(property, binding),
                                                      "Binding allowed reapplication with a different context");

            GC.KeepAlive(bindable);
        }