public void Set2WayBindingsWithUpdateSourceEventInBindingObject()
{
var nativeView = new MockNativeView();
Assert.AreEqual(null, nativeView.Baz);
var vm = new MockVMForNativeBinding();
nativeView.SetBindingContext(vm);
nativeView.SetBinding("Baz", new Binding("FFoo", mode: BindingMode.TwoWay)
{
UpdateSourceEventName = "BazChanged"
});
Assert.AreEqual(null, nativeView.Baz);
Assert.AreEqual(null, vm.FFoo);
nativeView.Baz = "oof";
nativeView.FireBazChanged();
Assert.AreEqual("oof", nativeView.Baz);
Assert.AreEqual("oof", vm.FFoo);
vm.FFoo = "foo";
Assert.AreEqual("foo", nativeView.Baz);
Assert.AreEqual("foo", vm.FFoo);
}
public void Set2WayBindings()
{
var nativeView = new MockNativeView();
Assert.AreEqual(null, nativeView.Foo);
Assert.AreEqual(0, nativeView.Bar);
var vm = new MockVMForNativeBinding();
nativeView.SetBindingContext(vm);
var inpc = new MockINPC();
nativeView.SetBinding("Foo", new Binding("FFoo", mode: BindingMode.TwoWay), inpc);
nativeView.SetBinding("Bar", new Binding("BBar", mode: BindingMode.TwoWay), inpc);
Assert.AreEqual(null, nativeView.Foo);
Assert.AreEqual(0, nativeView.Bar);
Assert.AreEqual(null, vm.FFoo);
Assert.AreEqual(0, vm.BBar);
nativeView.Foo = "oof";
inpc.FireINPC(nativeView, "Foo");
nativeView.Bar = -42;
inpc.FireINPC(nativeView, "Bar");
Assert.AreEqual("oof", nativeView.Foo);
Assert.AreEqual(-42, nativeView.Bar);
Assert.AreEqual("oof", vm.FFoo);
Assert.AreEqual(-42, vm.BBar);
vm.FFoo = "foo";
vm.BBar = 42;
Assert.AreEqual("foo", nativeView.Foo);
Assert.AreEqual(42, nativeView.Bar);
Assert.AreEqual("foo", vm.FFoo);
Assert.AreEqual(42, vm.BBar);
}
public void ThrowsOnMissingProperty()
{
var nativeView = new MockNativeView();
nativeView.SetBinding("Qux", new Binding("Foo"));
Assert.Throws <InvalidOperationException>(() => nativeView.SetBindingContext(new { Foo = 42 }));
}
public void NativeViewsAreCollected()
{
WeakReference wr = null;
int i = 0;
Action create = null;
create = () =>
{
if (i++ < 1024)
{
create();
return;
}
var nativeView = new MockNativeView();
nativeView.SetBinding("fooBar", new Binding("Foo", BindingMode.TwoWay));
nativeView.SetBinding("Baz", new Binding("Qux", BindingMode.TwoWay), "BazChanged");
wr = new WeakReference(nativeView);
nativeView = null;
};
create();
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
Assert.False(wr.IsAlive);
}
public void DoNotApplyNull()
{
var native = new MockNativeView();
Assert.NotNull(native.CantBeNull);
native.SetBinding("CantBeNull", new Binding("FFoo", BindingMode.TwoWay));
Assert.NotNull(native.CantBeNull);
native.SetBindingContext(new { FFoo = "foo" });
Assert.AreEqual("foo", native.CantBeNull);
}
public void TestConverterDoesNotThrow()
{
var nativeView = new MockNativeView();
Assert.AreEqual(null, nativeView.Foo);
Assert.AreEqual(0, nativeView.Bar);
var vm = new MockVMForNativeBinding();
var converter = new MockCustomColorConverter();
nativeView.SetBinding("SelectedColor", new Binding("CColor", converter: converter));
Assert.DoesNotThrow(() => nativeView.SetBindingContext(vm));
}
public void AttachedPropertiesAreTransferredFromTheBackpack()
{
var nativeView = new MockNativeView();
nativeView.SetValue(Grid.ColumnProperty, 3);
nativeView.SetBinding(Grid.RowProperty, new Binding("foo"));
var view = nativeView.ToView();
view.BindingContext = new { foo = 42 };
Assert.AreEqual(3, view.GetValue(Grid.ColumnProperty));
Assert.AreEqual(42, view.GetValue(Grid.RowProperty));
}
public void OneWayToSourceAppliedOnSetBC()
{
var nativeView = new MockNativeView {
Foo = "foobar"
};
nativeView.SetBinding("Foo", new Binding("FFoo", BindingMode.OneWayToSource));
var vm = new MockVMForNativeBinding {
FFoo = "qux"
};
nativeView.SetBindingContext(vm);
Assert.AreEqual("foobar", vm.FFoo);
}
public void TestConverterWorks()
{
var nativeView = new MockNativeView();
Assert.AreEqual(null, nativeView.Foo);
Assert.AreEqual(0, nativeView.Bar);
var vm = new MockVMForNativeBinding();
vm.CColor = Colors.Red;
var converter = new MockCustomColorConverter();
nativeView.SetBinding("SelectedColor", new Binding("CColor", converter: converter));
nativeView.SetBindingContext(vm);
Assert.AreEqual(vm.CColor, nativeView.SelectedColor.FormsColor);
}
public void SetOneWayBinding()
{
var nativeView = new MockNativeView();
Assert.AreEqual(null, nativeView.Foo);
Assert.AreEqual(0, nativeView.Bar);
nativeView.SetBinding("Foo", new Binding("FFoo", mode: BindingMode.OneWay));
nativeView.SetBinding("Bar", new Binding("BBar", mode: BindingMode.OneWay));
Assert.AreEqual(null, nativeView.Foo);
Assert.AreEqual(0, nativeView.Bar);
nativeView.SetBindingContext(new { FFoo = "Foo", BBar = 42 });
Assert.AreEqual("Foo", nativeView.Foo);
Assert.AreEqual(42, nativeView.Bar);
}
public void Binding2WayWithConvertersDoNotLoop()
{
var nativeView = new MockNativeView();
int count = 0;
nativeView.SelectedColorChanged += (o, e) =>
{
if (++count > 5)
{
Assert.Fail("Probable loop detected");
}
};
var vm = new MockVMForNativeBinding {
CColor = Colors.Red
};
nativeView.SetBinding("SelectedColor", new Binding("CColor", BindingMode.TwoWay, new MockCustomColorConverter()), "SelectedColorChanged");
nativeView.SetBindingContext(vm);
Assert.AreEqual(count, 1);
}
public void SetBindingContextToSubviews()
{
var nativeView = new MockNativeView {
SubViews = new List <MockNativeView>()
};
var nativeViewChild = new MockNativeView();
nativeViewChild.SetBinding("Foo", new Binding("FFoo", mode: BindingMode.OneWay));
nativeViewChild.SetBinding("Bar", new Binding("BBar", mode: BindingMode.OneWay));
nativeView.SubViews.Add(nativeViewChild);
var vm = new MockVMForNativeBinding();
nativeView.SetBindingContext(vm, v => v.SubViews);
Assert.AreEqual(null, nativeViewChild.Foo);
Assert.AreEqual(0, nativeViewChild.Bar);
nativeView.SetBindingContext(new { FFoo = "Foo", BBar = 42 }, v => v.SubViews);
Assert.AreEqual("Foo", nativeViewChild.Foo);
Assert.AreEqual(42, nativeViewChild.Bar);
}
public void ProxiesAreCollected()
{
WeakReference wr = null;
int i = 0;
Action create = null;
create = () =>
{
if (i++ < 1024)
{
create();
return;
}
var nativeView = new MockNativeView();
nativeView.SetBinding("fooBar", new Binding("Foo", BindingMode.TwoWay));
nativeView.SetBinding("Baz", new Binding("Qux", BindingMode.TwoWay), "BazChanged");
NativeBindingHelpers.BindableObjectProxy <MockNativeView> proxy;
if (!NativeBindingHelpers.BindableObjectProxy <MockNativeView> .BindableObjectProxies.TryGetValue(nativeView, out proxy))
{
Assert.Fail();
}
wr = new WeakReference(proxy);
nativeView = null;
};
create();
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
Assert.False(wr.IsAlive);
}
public void TestConverter2WayWorks()
{
var nativeView = new MockNativeView();
Assert.AreEqual(null, nativeView.Foo);
Assert.AreEqual(0, nativeView.Bar);
var inpc = new MockINPC();
var vm = new MockVMForNativeBinding();
vm.CColor = Colors.Red;
var converter = new MockCustomColorConverter();
nativeView.SetBinding("SelectedColor", new Binding("CColor", BindingMode.TwoWay, converter), inpc);
nativeView.SetBindingContext(vm);
Assert.AreEqual(vm.CColor, nativeView.SelectedColor.FormsColor);
var newFormsColor = Colors.Blue;
var newColor = new MockNativeColor(newFormsColor);
nativeView.SelectedColor = newColor;
inpc.FireINPC(nativeView, nameof(nativeView.SelectedColor));
Assert.AreEqual(newFormsColor, vm.CColor);
}
public void ThrowsOnMissingEvent()
{
var nativeView = new MockNativeView();
Assert.Throws <ArgumentException>(() => nativeView.SetBinding("Foo", new Binding("Foo", BindingMode.TwoWay), "missingEvent"));
}
public static void SetBinding(this MockNativeView target, BindableProperty targetProperty, BindingBase binding)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding);
}
internal static void SetBinding(this MockNativeView target, string targetProperty, BindingBase binding, INotifyPropertyChanged propertyChanged)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding, propertyChanged);
}
public MockNativeViewWrapper(MockNativeView nativeView)
{
NativeView = nativeView;
nativeView.TransferbindablePropertiesToWrapper(this);
}
public static void SetValue(this MockNativeView target, BindableProperty targetProperty, object value)
{
NativeBindingHelpers.SetValue(target, targetProperty, value);
}
public static void SetBindingContext(this MockNativeView target, object bindingContext, Func <MockNativeView, IEnumerable <MockNativeView> > getChild = null)
{
NativeBindingHelpers.SetBindingContext(target, bindingContext, getChild);
}
internal static void TransferbindablePropertiesToWrapper(this MockNativeView target, MockNativeViewWrapper wrapper)
{
NativeBindingHelpers.TransferBindablePropertiesToWrapper(target, wrapper);
}
public static View ToView(this MockNativeView nativeView)
{
return(new MockNativeViewWrapper(nativeView));
}
public static void SetBinding(this MockNativeView target, string targetProperty, BindingBase binding, string updateSourceEventName = null)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding, updateSourceEventName);
}