public void ShouldDoNothingWhenSettingPropertyToNullDataContext()
{
var target = new FrameworkElement();
target.DataContext = null;
var adapter = new DataContextPropertyAdapter(target, "Property");
adapter.SetValue("AnotherPropertyValue");
}
public void ShouldSetValueToDataContextProperty()
{
var dataContext = new DataContext {
Property = "OldPropertyValue"
};
var target = new FrameworkElement();
target.DataContext = dataContext;
var adapter = new DataContextPropertyAdapter(target, "Property");
adapter.SetValue("NewPropertyValue");
Assert.AreEqual("NewPropertyValue", dataContext.Property);
}
public void ShouldNotSetValueToPropertyOfOldDataContextAfterItChanges()
{
var target = new FrameworkElement();
var dataContext = new DataContext {
Property = "PropertyValue"
};
target.DataContext = dataContext;
var adapter = new DataContextPropertyAdapter(target, "Property");
target.DataContext = new DataContext {
Property = "OtherPropertyValue"
};
adapter.SetValue("AnotherPropertyValue");
Assert.AreEqual("PropertyValue", dataContext.Property);
}