public void Selected_Item_Changes_To_NextAvailable_Item_If_SelectedItem_Is_Removed_From_Middle()
{
var items = new ObservableCollection <string>
{
"Foo",
"Bar",
"FooBar"
};
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = items,
IsVirtualized = false
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
target.SelectedIndex = 1;
items.RemoveAt(1);
Assert.Equal(1, target.SelectedIndex);
Assert.Equal("FooBar", target.SelectedItem);
}
public void Selected_Index_Is_Maintained_Carousel_Created_With_Non_Zero_SelectedIndex()
{
var items = new ObservableCollection <string>
{
"Foo",
"Bar",
"FooBar"
};
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = items,
IsVirtualized = false,
SelectedIndex = 2
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Equal("FooBar", target.SelectedItem);
var child = target.GetVisualDescendants().LastOrDefault();
Assert.IsType <TextBlock>(child);
Assert.Equal("FooBar", ((TextBlock)child).Text);
}
public void Selected_Item_Changes_To_Next_First_Item_When_Item_Removed_From_Beggining_Of_List()
{
var items = new ObservableCollection <string>
{
"Foo",
"Bar",
"FooBar"
};
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = items,
IsVirtualized = false
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Single(target.GetLogicalChildren());
var child = target.GetLogicalChildren().Single();
Assert.IsType <TextBlock>(child);
Assert.Equal("Foo", ((TextBlock)child).Text);
items.RemoveAt(0);
child = target.GetLogicalChildren().Single();
Assert.IsType <TextBlock>(child);
Assert.Equal("Bar", ((TextBlock)child).Text);
}
public void Selected_Item_Changes_To_First_Item_When_Items_Property_Changes()
{
var items = new ObservableCollection <string>
{
"Foo",
"Bar",
"FooBar"
};
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = items,
IsVirtualized = false
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Equal(3, target.GetLogicalChildren().Count());
var child = GetContainerTextBlock(target.GetLogicalChildren().First());
Assert.Equal("Foo", child.Text);
var newItems = items.ToList();
newItems.RemoveAt(0);
target.Items = newItems;
child = GetContainerTextBlock(target.GetLogicalChildren().First());
Assert.Equal("Bar", child.Text);
}
public void Selected_Index_Changes_To_None_When_Items_Assigned_Null()
{
var items = new ObservableCollection <string>
{
"Foo",
"Bar",
"FooBar"
};
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = items,
IsVirtualized = false
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Equal(3, target.GetLogicalChildren().Count());
var child = GetContainerTextBlock(target.GetLogicalChildren().First());
Assert.Equal("Foo", child.Text);
target.Items = null;
var numChildren = target.GetLogicalChildren().Count();
Assert.Equal(0, numChildren);
Assert.Equal(-1, target.SelectedIndex);
}
public void Should_Not_Remove_NonCurrent_Page_When_IsVirtualized_False()
{
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = new[] { "foo", "bar" },
IsVirtualized = false,
SelectedIndex = 0,
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Single(target.ItemContainerGenerator.Containers);
target.SelectedIndex = 1;
Assert.Equal(2, target.ItemContainerGenerator.Containers.Count());
}
public void First_Item_Should_Be_Selected_By_Default()
{
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = new[]
{
"Foo",
"Bar"
}
};
target.ApplyTemplate();
Assert.Equal(0, target.SelectedIndex);
Assert.Equal("Foo", target.SelectedItem);
}
public void Should_Remove_NonCurrent_Page_When_IsVirtualized_True()
{
var target = new Carousel
{
Template = new FuncControlTemplate<Carousel>(CreateTemplate),
Items = new[] { "foo", "bar" },
IsVirtualized = true,
SelectedIndex = 0,
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Equal(1, target.ItemContainerGenerator.Containers.Count());
target.SelectedIndex = 1;
Assert.Equal(1, target.ItemContainerGenerator.Containers.Count());
}
public void First_Item_Should_Be_Selected_By_Default()
{
var target = new Carousel
{
Template = new FuncControlTemplate<Carousel>(CreateTemplate),
Items = new[]
{
"Foo",
"Bar"
}
};
target.ApplyTemplate();
Assert.Equal(0, target.SelectedIndex);
Assert.Equal("Foo", target.SelectedItem);
}
public void LogicalChild_Should_Be_Selected_Item()
{
var target = new Carousel
{
Template = new FuncControlTemplate<Carousel>(CreateTemplate),
Items = new[]
{
"Foo",
"Bar"
}
};
target.ApplyTemplate();
Assert.Equal(1, target.GetLogicalChildren().Count());
var child = target.GetLogicalChildren().Single();
Assert.IsType<TextBlock>(child);
Assert.Equal("Foo", ((TextBlock)child).Text);
}
public void LogicalChild_Should_Be_Selected_Item()
{
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = new[]
{
"Foo",
"Bar"
}
};
target.ApplyTemplate();
Assert.Equal(1, target.GetLogicalChildren().Count());
var child = target.GetLogicalChildren().Single();
Assert.IsType <TextBlock>(child);
Assert.Equal("Foo", ((TextBlock)child).Text);
}
public void LogicalChild_Should_Be_Selected_Item()
{
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = new[]
{
"Foo",
"Bar"
}
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Single(target.GetLogicalChildren());
var child = GetContainerTextBlock(target.GetLogicalChildren().Single());
Assert.Equal("Foo", child.Text);
}
public void Selected_Item_Changes_To_First_Item_When_Item_Added()
{
var items = new ObservableCollection <string>();
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = items,
IsVirtualized = false
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Equal(-1, target.SelectedIndex);
Assert.Empty(target.GetLogicalChildren());
items.Add("Foo");
Assert.Equal(0, target.SelectedIndex);
Assert.Single(target.GetLogicalChildren());
}
public void SelectedItem_Validation()
{
using (UnitTestApplication.Start(TestServices.MockThreadingInterface))
{
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate), IsVirtualized = false
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var exception = new System.InvalidCastException("failed validation");
var textObservable =
new BehaviorSubject <BindingNotification>(new BindingNotification(exception,
BindingErrorType.DataValidationError));
target.Bind(ComboBox.SelectedItemProperty, textObservable);
Assert.True(DataValidationErrors.GetHasErrors(target));
Assert.True(DataValidationErrors.GetErrors(target).SequenceEqual(new[] { exception }));
}
}
public void Selected_Item_Changes_To_First_Item_When_Items_Property_Changes_And_Virtualized()
{
var items = new ObservableCollection <string>
{
"Foo",
"Bar",
"FooBar"
};
var target = new Carousel
{
Template = new FuncControlTemplate <Carousel>(CreateTemplate),
Items = items
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Single(target.GetLogicalChildren());
var child = target.GetLogicalChildren().Single();
Assert.IsType <TextBlock>(child);
Assert.Equal("Foo", ((TextBlock)child).Text);
var newItems = items.ToList();
newItems.RemoveAt(0);
target.Items = newItems;
child = target.GetLogicalChildren().Single();
Assert.IsType <TextBlock>(child);
Assert.Equal("Bar", ((TextBlock)child).Text);
}
