public void PropertyOwnersMarkedForGC_BindingReleased()
{
WeakReference<ViewModel1> wr1 = null;
WeakReference<ViewModel2> wr2 = null;
new Action( () =>
{
var vm1 = new ViewModel1();
var vm2 = new ViewModel2();
wr1 = new WeakReference<ViewModel1>( vm1 );
wr2 = new WeakReference<ViewModel2>( vm2 );
PropertyBinding.Bind( () => vm1.PrimaryValue, () => vm2.SecondaryValue, BindingMode.TwoWay );
} )();
EnforceGC();
{
ViewModel1 vm1;
Assert.That( wr1.TryGetTarget( out vm1 ), Is.False );
ViewModel2 vm2;
Assert.That( wr2.TryGetTarget( out vm2 ), Is.False );
}
}
public void Create_ExpressionWithLocalVariable_OwnerAndPropertyCorrectlyDetected()
{
var vm = new ViewModel1();
var prop = BindableProperty.Create( () => vm.PrimaryValue );
Assert.That( prop.Owner, Is.EqualTo( vm ) );
Assert.That( prop.PropertyName, Is.EqualTo( "PrimaryValue" ) );
}
public void Create_ExpressionPath_OwnerAndPropertyCorrectlyDetected()
{
var vm = new ViewModel1();
var prop = BindableProperty.Create( () => vm.Model.ModelValue );
Assert.That( prop.Owner, Is.EqualTo( vm.Model ) );
Assert.That( prop.PropertyName, Is.EqualTo( "ModelValue" ) );
}
public void OneWayToSourceBinding_ChangesOnTargetNotSyncedtoSource()
{
var vm1 = new ViewModel1();
var vm2 = new ViewModel2();
PropertyBinding.Bind( () => vm1.PrimaryValue, () => vm2.SecondaryValue, BindingMode.OneWayToSource );
vm1.PrimaryValue = 42;
Assert.That( vm2.SecondaryValue, Is.Not.EqualTo( 42 ) );
}
public void Create_InstanceAndPropertyName_OwnerAndPropertyCorrectlyDetected()
{
var vm = new ViewModel1();
var prop = BindableProperty.Create( vm, "PrimaryValue" );
Assert.That( prop.Owner, Is.EqualTo( vm ) );
Assert.That( prop.PropertyName, Is.EqualTo( "PrimaryValue" ) );
}
public void PropertyOwnersStillAlive_BindingsSurvivesGC()
{
var vm1 = new ViewModel1();
var vm2 = new ViewModel2();
PropertyBinding.Bind( () => vm1.PrimaryValue, () => vm2.SecondaryValue, BindingMode.TwoWay );
EnforceGC();
{
// lets see whether binding still works
vm1.PrimaryValue = 42;
Assert.That( vm2.SecondaryValue, Is.EqualTo( 42 ) );
}
}
public void TwoWayBinding_ChangesOnEitherEndSyncedToTheOtherOne()
{
var vm1 = new ViewModel1();
var vm2 = new ViewModel2();
PropertyBinding.Bind( () => vm1.PrimaryValue, () => vm2.SecondaryValue, BindingMode.TwoWay );
vm1.PrimaryValue = 42;
Assert.That( vm2.SecondaryValue, Is.EqualTo( 42 ) );
vm2.SecondaryValue = 24;
Assert.That( vm1.PrimaryValue, Is.EqualTo( 24 ) );
}