public void TestSelectedItemChangeSelectedIndex()
{
var obj = new PickerTestsContextFixture("John", "John");
var bindingContext = new PickerTestsBindingContext
{
Items = new ObservableCollection <object>
{
obj
},
};
var picker = new Picker
{
BindingContext = bindingContext,
ItemDisplayBinding = new Binding("DisplayName"),
};
picker.SetBinding(Picker.ItemsSourceProperty, "Items");
picker.SetBinding(Picker.SelectedItemProperty, "SelectedItem");
Assert.AreEqual(1, picker.Items.Count);
Assert.AreEqual(-1, picker.SelectedIndex);
Assert.AreEqual(null, picker.SelectedItem);
picker.SelectedItem = obj;
Assert.AreEqual(0, picker.SelectedIndex);
Assert.AreEqual(obj, picker.SelectedItem);
picker.SelectedIndex = -1;
Assert.AreEqual(-1, picker.SelectedIndex);
Assert.AreEqual(null, picker.SelectedItem);
}
public void TestDisplayConverter()
{
var obj = new PickerTestsContextFixture("John", "John Doe");
var converter = new PickerTestValueConverter();
var picker = new Picker
{
ItemDisplayBinding = new Binding(Binding.SelfPath, converter: converter),
ItemsSource = new ObservableCollection <object>
{
obj
}
};
Assert.IsTrue(converter.ConvertCalled);
Assert.AreEqual("John", picker.Items[0]);
}
public void TestNestedDisplayMemberPathExpression()
{
var obj = new PickerTestsContextFixture
{
Nested = new PickerTestsContextFixture.PickerTestsNestedClass
{
Nested = "NestedProperty"
}
};
var picker = new Picker
{
ItemDisplayBinding = new Binding("Nested.Nested"),
ItemsSource = new ObservableCollection <object>
{
obj
},
SelectedIndex = 0
};
Assert.AreEqual("NestedProperty", picker.Items[0]);
}
