public void Should_Return_FallbackValue_When_Converter_Returns_UnsetValue()
{
var target = new TextBlock();
var source = new { A = 1, B = 2, C = 3 };
var binding = new MultiBinding
{
Converter = new UnsetValueConverter(),
Bindings = new[]
{
new Binding { Path = "A" },
new Binding { Path = "B" },
new Binding { Path = "C" },
},
FallbackValue = "fallback",
};
target.Bind(TextBlock.TextProperty, binding);
Assert.Equal("fallback", target.Text);
}
public async void OneWay_Binding_Should_Be_Set_Up()
{
var source = new { A = 1, B = 2, C = 3 };
var binding = new MultiBinding
{
Converter = new ConcatConverter(),
Bindings = new[]
{
new Binding { Path = "A" },
new Binding { Path = "B" },
new Binding { Path = "C" },
}
};
var target = new Mock<IPerspexObject>();
target.Setup(x => x.GetValue(Control.DataContextProperty)).Returns(source);
var subject = binding.CreateSubject(target.Object, null);
var result = await subject.Take(1);
Assert.Equal("1,2,3", result);
}
public async void OneWay_Binding_Should_Be_Set_Up()
{
var source = new { A = 1, B = 2, C = 3 };
var binding = new MultiBinding
{
Converter = new ConcatConverter(),
Bindings = new[]
{
new Binding { SourcePropertyPath = "A" },
new Binding { SourcePropertyPath = "B" },
new Binding { SourcePropertyPath = "C" },
}
};
var target = new Mock<IObservablePropertyBag>();
target.Setup(x => x.GetValue(Control.DataContextProperty)).Returns(source);
target.Setup(x => x.GetObservable(Control.DataContextProperty)).Returns(
Observable.Never<object>().StartWith(source));
var subject = binding.CreateSubject(target.Object, typeof(string));
var result = await subject.Take(1);
Assert.Equal("1,2,3", result);
}