private static void AssertValidState <T, U, V>(ISelectionPageModel <T, U, V> selection)
where U : IPageModel
where V : ISelectablePageModel <U>, ITextValuedPageModel <T>
{
if (selection.SelectedItem == null)
{
AssertNothingSelected(selection);
}
else
{
AssertSingleSelection(selection);
Assert.IsTrue(selection.SelectedItem.IsSelected);
}
}
private static void ISelectionPageModel_StandardTests <T, U, V>(ISelectionPageModel <T, U, V> selection)
where U : IPageModel
where V : ISelectablePageModel <U>, ITextValuedPageModel <T>
{
if (!selection.Items.Any())
{
Assert.Inconclusive();
}
AssertValidState(selection);
if (selection.SelectedItem != null)
{
selection.SelectedItem.SetSelected(false);
AssertValidState(selection);
}
foreach (var selectionItem in selection.Items)
{
selectionItem.SetSelected(true);
AssertValidState(selection);
}
}
private static void AssertSingleSelection <T, U, V>(ISelectionPageModel <T, U, V> selection)
where U : IPageModel
where V : ISelectablePageModel <U>, ITextValuedPageModel <T>
{
Assert.IsTrue(selection.Items.SkipWhile(x => !x.IsSelected).Skip(1).All(x => !x.IsSelected));
}
private static void AssertNothingSelected <T, U, V>(ISelectionPageModel <T, U, V> selection)
where U : IPageModel
where V : ISelectablePageModel <U>, ITextValuedPageModel <T>
{
Assert.IsTrue(selection.Items.All(x => !x.IsSelected));
}
