public void Remove_InvokeWithCollectionChanging_CallsHandler()
{
var collection = new BindingsCollection();
var binding = new Binding(null, new object(), "member");
int changingCallCount = 0;
int changedCallCount = 0;
CollectionChangeEventHandler changingHandler = (sender, e) =>
{
Assert.Same(collection, sender);
Assert.Equal(CollectionChangeAction.Remove, e.Action);
Assert.Same(binding, e.Element);
changingCallCount++;
Assert.True(changingCallCount > changedCallCount);
};
CollectionChangeEventHandler changedHandler = (sender, e) =>
{
Assert.Same(collection, sender);
Assert.Equal(CollectionChangeAction.Remove, e.Action);
Assert.Same(binding, e.Element);
changedCallCount++;
Assert.Equal(changingCallCount, changedCallCount);
};
collection.Add(binding);
collection.CollectionChanging += changingHandler;
collection.CollectionChanged += changedHandler;
collection.Remove(binding);
Assert.Equal(1, changingCallCount);
Assert.Equal(1, changedCallCount);
Assert.Empty(collection);
// Add again.
collection.CollectionChanging -= changingHandler;
collection.CollectionChanged -= changedHandler;
collection.Add(binding);
collection.CollectionChanging += changingHandler;
collection.CollectionChanged += changedHandler;
collection.Remove(binding);
Assert.Equal(2, changingCallCount);
Assert.Equal(2, changedCallCount);
Assert.Empty(collection);
// Remove handler.
collection.CollectionChanging -= changingHandler;
collection.CollectionChanged -= changedHandler;
collection.Add(binding);
collection.Remove(binding);
Assert.Equal(2, changingCallCount);
Assert.Equal(2, changedCallCount);
Assert.Empty(collection);
}
public void Remove_NullDataBinding_Nop()
{
var collection = new BindingsCollection();
var binding = new Binding(null, new object(), "member");
collection.Add(binding);
collection.Remove(null);
Assert.Same(binding, Assert.Single(collection));
}
public void Bindings_RemoveNullDataBinding_ThrowsArgumentNullException()
{
var manager = new PropertyManager();
BindingsCollection collection = manager.Bindings;
var binding = new Binding(null, new object(), "member");
collection.Add(binding);
Assert.Throws <ArgumentNullException>("dataBinding", () => collection.Remove(null));
Assert.Same(binding, Assert.Single(collection));
}
public void Bindings_Remove_Success()
{
var manager = new PropertyManager();
BindingsCollection collection = manager.Bindings;
var binding = new Binding(null, new object(), "member");
collection.Add(binding);
Assert.Same(binding, Assert.Single(collection));
Assert.Same(manager, binding.BindingManagerBase);
collection.Remove(binding);
Assert.Empty(collection);
Assert.Null(binding.BindingManagerBase);
}
public void Remove_DataBindingFromOtherCollection_Nop()
{
var collection1 = new BindingsCollection();
var collection2 = new BindingsCollection();
var binding1 = new Binding(null, new object(), "member");
var binding2 = new Binding(null, new object(), "member");
collection1.Add(binding1);
collection2.Add(binding2);
collection2.Remove(binding1);
Assert.Same(binding1, Assert.Single(collection1));
Assert.Same(binding2, Assert.Single(collection2));
}
public void Bindings_RemoveDataBindingFromOtherCollection_ThrowsArgumentException()
{
var manager1 = new PropertyManager();
var manager2 = new PropertyManager();
BindingsCollection collection1 = manager1.Bindings;
BindingsCollection collection2 = manager2.Bindings;
var binding1 = new Binding(null, new object(), "member");
var binding2 = new Binding(null, new object(), "member");
collection1.Add(binding1);
collection2.Add(binding2);
Assert.Throws <ArgumentException>("dataBinding", () => collection2.Remove(binding1));
Assert.Same(binding1, Assert.Single(collection1));
Assert.Same(binding2, Assert.Single(collection2));
}
