public void ClearDataContextWhenThereIsNoInheritedValueFromParent()
{
using(var form = new Form()) {
var button1 = new Button();
button1.SetDataContext("button3");
form.Controls.Add(button1);
button1.ClearDataContext();
Assert.That(button1.GetDataContext(), Is.Null);
Assert.That(button1.HasLocalDataContext(), Is.False);
Assert.That(form.HasLocalDataContext(), Is.False);
}
}
public void InheritDataContextFromParent()
{
using(var form = new Form()) {
var button1 = new Button();
var button2 = new Button();
var button3 = new Button();
button3.SetDataContext("button3");
form.Controls.Add(button1);
form.SetDataContext("test");
form.Controls.Add(button2);
form.Controls.Add(button3);
Assert.That(button1.GetDataContext(), Is.EqualTo("test"));
Assert.That(button2.GetDataContext(), Is.EqualTo("test"));
Assert.That(button3.GetDataContext(), Is.EqualTo("button3"));
Assert.That(button1.HasLocalDataContext(), Is.False);
Assert.That(button2.HasLocalDataContext(), Is.False);
Assert.That(button3.HasLocalDataContext(), Is.True);
button1.SetDataContext("button1");
Assert.That(button1.GetDataContext(), Is.EqualTo("button1"));
button2.SetDataContext(null);
Assert.That(button2.GetDataContext(), Is.Null);
Assert.That(button1.HasLocalDataContext(), Is.True);
Assert.That(button2.HasLocalDataContext(), Is.True);
button3.ClearDataContext();
Assert.That(button3.GetDataContext(), Is.EqualTo("test"));
Assert.That(button3.HasLocalDataContext(), Is.False);
}
}
public void SetAndGetDataContextForControl()
{
using(var button1 = new Button()) {
Assert.That(button1.GetDataContext(), Is.Null);
Assert.That(button1.HasLocalDataContext(), Is.False);
button1.SetDataContext("test");
Assert.That(button1.GetDataContext(), Is.EqualTo("test"));
Assert.That(button1.HasLocalDataContext(), Is.True);
button1.ClearDataContext();
Assert.That(button1.GetDataContext(), Is.Null);
Assert.That(button1.HasLocalDataContext(), Is.False);
}
using(var button2 = new Button()) {
Assert.That(button2.GetDataContext(), Is.Null);
button2.SetDataContext(13);
Assert.That(button2.GetDataContext(), Is.EqualTo(13));
}
using(var button3 = new Button()) {
button3.ClearDataContext();
Assert.That(button3.GetDataContext(), Is.Null);
Assert.That(button3.HasLocalDataContext(), Is.False);
}
}
public void SetSimpleBindingBeforeSetDataContext()
{
using(var button = new Button()) {
button.SetBinding("Text", new Binding());
Assert.That(button.HasLocalDataContext(), Is.False);
button.SetDataContext("test");
Assert.That(button.Text, Is.EqualTo("test"));
Assert.That(button.HasLocalDataContext(), Is.True);
button.SetDataContext("test2");
Assert.That(button.Text, Is.EqualTo("test2"));
button.ClearDataContext();
Assert.That(button.Text, Is.EqualTo(string.Empty));
button.SetDataContext("test3");
Assert.That(button.Text, Is.EqualTo("test3"));
button.ClearBinding("Text");
button.ClearBinding("Tag");
Assert.That(button.Text, Is.EqualTo(string.Empty));
Assert.That(button.Tag, Is.Null);
button.SetDataContext("test4");
Assert.That(button.Text, Is.EqualTo(string.Empty));
}
}
public void SetSimpleBindingAfterSetDataContext()
{
using(var button = new Button()) {
button.SetDataContext("test");
button.SetBinding("Text", new Binding());
Assert.That(button.Text, Is.EqualTo("test"));
button.SetDataContext("test2");
Assert.That(button.Text, Is.EqualTo("test2"));
int textChangedCount = 0;
button.TextChanged += (sender, e) => {
textChangedCount++;
};
button.SetDataContext("test2");
Assert.That(textChangedCount, Is.EqualTo(0));
button.ClearDataContext();
Assert.That(button.Text, Is.EqualTo(string.Empty));
button.SetDataContext("test3");
Assert.That(button.Text, Is.EqualTo("test3"));
}
}
public void InheritedDataContextBinding_BindAfterAddToTree()
{
using(var form = new Form()) {
var button1 = new Button();
var button2 = new Button();
form.Controls.Add(button1);
form.SetDataContext("test");
form.Controls.Add(button2);
button1.SetBinding("Text", new Binding());
Assert.That(button1.Text, Is.EqualTo("test"));
Assert.That(button1.HasLocalDataContext(), Is.False);
button2.SetBinding("Text", new Binding());
Assert.That(button2.Text, Is.EqualTo("test"));
Assert.That(button2.HasLocalDataContext(), Is.False);
form.SetDataContext("test2");
Assert.That(button1.Text, Is.EqualTo("test2"));
Assert.That(button1.HasLocalDataContext(), Is.False);
Assert.That(button2.Text, Is.EqualTo("test2"));
Assert.That(button2.HasLocalDataContext(), Is.False);
button1.SetDataContext("button1");
Assert.That(button1.Text, Is.EqualTo("button1"));
Assert.That(button1.HasLocalDataContext(), Is.True);
button2.SetDataContext(null);
Assert.That(button2.Text, Is.EqualTo(string.Empty));
Assert.That(button2.HasLocalDataContext(), Is.True);
button1.ClearDataContext();
Assert.That(button1.Text, Is.EqualTo("test2"));
Assert.That(button1.HasLocalDataContext(), Is.False);
button2.ClearDataContext();
Assert.That(button2.Text, Is.EqualTo("test2"));
Assert.That(button2.HasLocalDataContext(), Is.False);
form.ClearDataContext();
Assert.That(button1.Text, Is.EqualTo(string.Empty));
Assert.That(button1.HasLocalDataContext(), Is.False);
Assert.That(button2.Text, Is.EqualTo(string.Empty));
Assert.That(button2.HasLocalDataContext(), Is.False);
button1.SetDataContext("button1");
Assert.That(button1.Text, Is.EqualTo("button1"));
Assert.That(button1.HasLocalDataContext(), Is.True);
form.SetDataContext("test");
Assert.That(button1.Text, Is.EqualTo("button1"));
Assert.That(button1.HasLocalDataContext(), Is.True);
Assert.That(button2.Text, Is.EqualTo("test"));
Assert.That(button2.HasLocalDataContext(), Is.False);
form.Controls.Clear();
Assert.That(button1.Text, Is.EqualTo("button1"));
Assert.That(button2.Text, Is.EqualTo(string.Empty));
}
}
public void CollectBindingSourceOnlyAfterClearBinding()
{
using(var button = new Button()) {
WeakReference reference = DoBindButtonAndGetViewModelReference(button);
TestUtils.GarbageCollect();
Assert.That(reference.IsAlive, Is.True);
Assert.That(button.Text, Is.EqualTo("test"));
button.ClearDataContext();
TestUtils.GarbageCollect();
Assert.That(reference.IsAlive, Is.False);
Assert.That(button.Text, Is.EqualTo(string.Empty));
}
}
