public void RemoveCurrent()
{
var list = new SinglyLinkedList <int>();
list.AddAll(1, 2, 3, 4, 5);
var enumerator = list.GetEnumerator();
Assert.True(enumerator.MoveNext());
enumerator.RemoveCurrent();
Assert.Equal(4, list.Count);
Assert.Null(enumerator.Current);
Assert.True(enumerator.MoveNext());
Assert.Equal(2, enumerator.Current);
Assert.True(enumerator.MoveNext());
Assert.Equal(3, enumerator.Current);
enumerator.RemoveCurrent();
Assert.Equal(3, list.Count);
Assert.Equal(2, enumerator.Current);
Assert.True(enumerator.MoveNext());
Assert.True(enumerator.MoveNext());
Assert.Equal(5, enumerator.Current);
enumerator.RemoveCurrent();
Assert.Equal(2, list.Count);
Assert.Equal(4, enumerator.Current);
Assert.False(enumerator.MoveNext());
Assert.Null(enumerator.Current);
Assert.Equal(new int[] { 2, 4 }, list.WalkToList());
Assert.Equal(new int[] { 2, 4 }, list.EnumerateToList());
}
public void MoveToFront()
{
var list = new SinglyLinkedList <int>();
list.AddAll(1, 2, 3, 4, 5);
var enumerator = list.GetEnumerator();
Assert.True(enumerator.MoveNext());
enumerator.MoveCurrentToFront();
// Should be moved back in front
Assert.Null(enumerator.Current);
Assert.Equal(5, list.Count);
Assert.True(enumerator.MoveNext());
Assert.Equal(1, enumerator.Current);
Assert.True(enumerator.MoveNext());
Assert.Equal(2, enumerator.Current);
enumerator.MoveCurrentToFront();
Assert.Equal(1, enumerator.Current);
Assert.True(enumerator.MoveNext());
Assert.Equal(3, enumerator.Current);
Assert.True(enumerator.MoveNext());
Assert.Equal(4, enumerator.Current);
Assert.True(enumerator.MoveNext());
Assert.Equal(5, enumerator.Current);
enumerator.MoveCurrentToFront();
Assert.Equal(4, enumerator.Current);
Assert.False(enumerator.MoveNext());
Assert.Null(enumerator.Current);
Assert.Equal(5, list !.First);
Assert.Equal(new int[] { 5, 2, 1, 3, 4 }, list.WalkToList());
Assert.Equal(new int[] { 5, 2, 1, 3, 4 }, list.EnumerateToList());
}