public void Should_Bind_To_Element_Path()
{
TextBlock target;
var root = new TestRoot
{
Child = new StackPanel
{
Children = new Controls.Controls
{
new TextBlock
{
Name = "source",
Text = "foo",
},
(target = new TextBlock
{
Name = "target",
})
}
}
};
var binding = new Binding
{
ElementName = "source",
Path = "Text",
};
target.Bind(TextBox.TextProperty, binding);
Assert.Equal("foo", target.Text);
}
public void Source_Should_Be_Used()
{
var source = new Source { Foo = "foo" };
var binding = new Binding { Source = source, Path = "Foo" };
var target = new TextBlock();
target.Bind(TextBlock.TextProperty, binding);
Assert.Equal(target.Text, "foo");
}
public void OneTime_Binding_Should_Be_Set_Up()
{
var source = new Source { Foo = "foo" };
var target = new TextBlock { DataContext = source };
var binding = new Binding
{
Path = "Foo",
Mode = BindingMode.OneTime,
};
target.Bind(TextBox.TextProperty, binding);
Assert.Equal("foo", target.Text);
source.Foo = "bar";
Assert.Equal("foo", target.Text);
target.Text = "baz";
Assert.Equal("bar", source.Foo);
}
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 void Default_BindingMode_Should_Be_Used()
{
// Default for TextBox.Text is two-way.
var source = new Source { Foo = "foo" };
var target = new TextBlock { DataContext = source };
var binding = new Binding
{
Path = "Foo",
};
target.Bind(TextBox.TextProperty, binding);
Assert.Equal("foo", target.Text);
source.Foo = "bar";
Assert.Equal("bar", target.Text);
target.Text = "baz";
Assert.Equal("baz", source.Foo);
}
public void Should_Return_FallbackValue_When_Path_Not_Resolved()
{
var target = new TextBlock();
var source = new Source();
var binding = new Binding
{
Source = source,
Path = "BadPath",
FallbackValue = "foofallback",
};
target.Bind(TextBlock.TextProperty, binding);
Assert.Equal("foofallback", target.Text);
}