public void BindFromExpression_ComplexBinding_WrongInitialValue_ThrowsExeption()
{
var target = new GenericBindingTarget<int>();
var source1 = new GenericNotifyPropertyChanged<int>();
var source2 = new GenericNotifyPropertyChanged<GenericNotifyPropertyChanged<int>>();
BindingEx.BindFromExpression(() => target.Value == source1.Value + source2.Value.Value);
}
public void BindFromExpression_SimpleBinding()
{
var target = new GenericBindingTarget<int>();
var source = new GenericNotifyPropertyChanged<int>();
BindingEx.BindFromExpression(() => target.Value == source.Value);
Assert.AreEqual(0, target.Value);
source.Value = 1;
Assert.AreEqual(1, target.Value);
}
public void BindFromExpression_ComplexBinding_WrongValueSet_ThrowsExeption()
{
var target = new GenericBindingTarget<int>();
var source1 = new GenericNotifyPropertyChanged<int>();
var source2 = new GenericNotifyPropertyChanged<GenericNotifyPropertyChanged<int>>();
source2.Value = new GenericNotifyPropertyChanged<int>();
BindingEx.BindFromExpression(() => target.Value == source1.Value + source2.Value.Value);
Assert.AreEqual(0, target.Value);
source1.Value = 1;
Assert.AreEqual(1, target.Value);
source2.Value.Value = 1;
Assert.AreEqual(2, target.Value);
source2.Value = null;
}
public void BindFromExpression_ComplexBinding_DisposeSubsription_RemovesBinding()
{
var target = new GenericBindingTarget<int>();
var source1 = new GenericNotifyPropertyChanged<int>();
var source2 = new GenericNotifyPropertyChanged<int>();
using (BindingEx.BindFromExpression(() => target.Value == source1.Value + source2.Value))
{
Assert.AreEqual(0, target.Value);
source1.Value = 1;
Assert.AreEqual(1, target.Value);
source2.Value = 1;
Assert.AreEqual(2, target.Value);
}
source1.Value = 2;
source2.Value = 2;
// Value should be reseted to 0
Assert.AreEqual(0, target.Value);
}
public void FromExpression_SimpleBinding()
{
var target = new GenericBindingTarget<int>();
var source = new GenericNotifyPropertyChanged<int>();
BindingBase binding = BindingEx.FromExpression(() => source.Value);
target.SetBinding(GenericBindingTarget<int>.ValueProperty, binding);
Assert.AreEqual(0, target.Value);
source.Value = 1;
Assert.AreEqual(1, target.Value);
}
