public void SelectedItem_SelectedIndex_Changed()
{
var obj = new ContextFixture("Monkey", "Monkey");
var bindingContext = new BindingContext
{
Items = new ObservableCollection <object>
{
obj
},
};
var picker = new BindablePicker
{
BindingContext = bindingContext,
DisplayMemberPath = "DisplayName"
};
picker.SetBinding(BindablePicker.ItemsSourceProperty, "Items");
picker.SetBinding(BindablePicker.SelectedItemProperty, "SelectedItem");
Assert.Equal(1, picker.Items.Count);
Assert.Equal(-1, picker.SelectedIndex);
Assert.Null(picker.SelectedItem);
picker.SelectedItem = obj;
Assert.Equal(0, picker.SelectedIndex);
Assert.Equal(obj, picker.SelectedItem);
picker.SelectedIndex = -1;
Assert.Equal(-1, picker.SelectedIndex);
Assert.Null(picker.SelectedItem);
}
public void DisplayMemberPath_ShouldThrowArgumentException_InvalidPath()
{
var obj = new ContextFixture("Monkey", "Complex Monkey");
Func <Picker> picker = () => new BindablePicker
{
DisplayMemberPath = "Name",
ItemsSource = new ObservableCollection <object>
{
obj
},
SelectedIndex = 1
};
Assert.Throws <ArgumentException>(() => picker());
}
public void DisplayMemberPath_NestedPropertyExpression()
{
var obj = new ContextFixture
{
Nested = new ContextFixture.NestedClass
{
Nested = "NestedProperty"
}
};
var picker = new BindablePicker
{
DisplayMemberPath = "Nested.Nested",
ItemsSource = new ObservableCollection <object>
{
obj
},
SelectedIndex = 0
};
Assert.Equal("NestedProperty", picker.Items[0]);
}
public void DisplayMemberFunc()
{
Func <object, string> customDisplayFunc = o =>
{
var f = (ContextFixture)o;
return($"{f.DisplayName} ({f.ComplexName})");
};
var obj = new ContextFixture("Monkey", "Complex Monkey");
var picker = new BindablePicker
{
DisplayMemberPath = "Name",
DisplayMemberFunc = customDisplayFunc,
ItemsSource = new ObservableCollection <object>
{
obj
},
SelectedIndex = 1
};
Assert.Equal("Monkey (Complex Monkey)", picker.Items[0]);
}
