public void NotDeleted_Should_Throw_ArgumentNullException_If_Items_Is_Null()
{
IQueryable <TodoItem> items = null;
var ex = Assert.Throws <ArgumentNullException>(() => TodoExtensions.NotDeleted(items));
Assert.Equal(nameof(items), ex.ParamName);
}
public void NotDeleted_Should_Return_Only_Items_Not_Deleted()
{
var todo1 = TodoItem.NewTodo("text1");
var todo2 = TodoItem.NewTodo("text2");
var todo3 = TodoItem.NewTodo("text3");
todo3.Delete();
IQueryable <TodoItem> items = new[] { todo1, todo2, todo3 }.AsQueryable();
var notDeletedItems = TodoExtensions.NotDeleted(items);
Assert.True(notDeletedItems.All(t => !t.IsDeleted));
}
