public void On_inserting_one_leaf_and_deleting_last_element()
{
BaselineTree baselineTree = BuildATree();
baselineTree.Insert(_testLeaves[0]);
baselineTree.Count.Should().Be(1);
baselineTree.DeleteLast();
baselineTree.Count.Should().Be(0);
}
public void On_deleting_last_element()
{
BaselineTree baselineTree = BuildATree();
baselineTree.Insert(_testLeaves[0]);
baselineTree.Insert(_testLeaves[1]);
baselineTree.Insert(_testLeaves[2]);
baselineTree.Count.Should().Be(3);
baselineTree.DeleteLast();
baselineTree.Count.Should().Be(2);
}