void AddListFrom(IReadOnlyList <int> collection, IReadOnlyList <int> items, bool reversed, bool isMutated, IReadOnlyList <int> expected)
{
// Arrange
var left = new DoubleLinkedList <int>(collection);
var version = left.Version;
var right = new DoubleLinkedList <int>(items);
// Act
left.AddFirstFrom(right, reversed);
// Assert
left.Count.Should().Be(expected.Count);
if (isMutated)
{
left.Version.Should().NotBe(version);
}
else
{
left.Version.Should().Be(version);
}
left.EnumerateForward().Should().Equal(expected);
left.EnumerateReversed().Should().Equal(expected.Reverse());
right.Count.Should().Be(0);
}