public void ProperlyBindCollectionChanged()
{
var connector = new TConnector();
Assert.IsNull(connector.ModelCollection);
var mc = new ObservableCollectionEventChangeChecker <TestModel>();
Assert.IsFalse(mc.CollectionChangedEventHandlerAdded);
connector.ModelCollection = mc;
Assert.IsTrue(mc.CollectionChangedEventHandlerAdded);
}
public void UnbindViewModelCollectionWhenReplaced()
{
var sp = new StackPanel();
var vm = new ObservableCollectionEventChangeChecker <IViewModel <TestModel> >();
var conn = new TConnector
{
ViewCollection = sp.Children,
ViewModelCollection = vm
};
Assert.IsFalse(vm.CollectionChangedEventHandlerRemoved);
conn.ViewModelCollection = null;
Assert.IsTrue(vm.CollectionChangedEventHandlerRemoved);
}
public void IgnoreChangingTheCollectionIfItIsTheSame()
{
var mc = new ObservableCollectionEventChangeChecker <TestModel>();
var connector = new TConnector
{
ModelCollection = mc
};
mc.CollectionChangedEventHandlerAdded = false;
mc.CollectionChangedEventHandlerRemoved = false;
connector.ModelCollection = mc;
Assert.IsFalse(mc.CollectionChangedEventHandlerAdded);
Assert.IsFalse(mc.CollectionChangedEventHandlerRemoved);
}
public void KeepViewModelCollectionUnchangedIfReplacedWithTheSameObject()
{
var sp = new StackPanel();
var vms = new ObservableCollectionEventChangeChecker <IViewModel <TestModel> > {
new TestViewModel()
};
var conn = new TConnector
{
ViewCollection = sp.Children,
ViewModelCollection = vms
};
vms.CollectionChangedEventHandlerAdded = false;
vms.CollectionChangedEventHandlerRemoved = false;
conn.ViewModelCollection = vms;
Assert.IsFalse(vms.CollectionChangedEventHandlerAdded);
Assert.IsFalse(vms.CollectionChangedEventHandlerRemoved);
}
public void ProperlyUnbindCollectionChanged()
{
var mc1 = new ObservableCollectionEventChangeChecker <TestModel>();
var mc2 = new ObservableCollectionEventChangeChecker <TestModel>();
var connector = new TConnector {
ModelCollection = mc1
};
mc1.CollectionChangedEventHandlerAdded = false;
Assert.IsFalse(mc1.CollectionChangedEventHandlerAdded);
Assert.IsFalse(mc1.CollectionChangedEventHandlerRemoved);
Assert.IsFalse(mc2.CollectionChangedEventHandlerAdded);
Assert.IsFalse(mc2.CollectionChangedEventHandlerRemoved);
connector.ModelCollection = mc2;
Assert.IsTrue(mc1.CollectionChangedEventHandlerRemoved);
Assert.IsTrue(mc2.CollectionChangedEventHandlerAdded);
}
