public void EnumerateList()
{
var list = new[] { 0, 1, 2 };
var e = CircularEnumerator.Create(list);
e.Should().NotBeNull();
e.CursorIndex.Should().NotHaveValue();
e.Values.Should().BeSameAs(list);
e.Started.Should().BeFalse();
Action currentItem = () => { var x = e.GetCurrentItem(); };
currentItem.Should().Throw <InvalidOperationException>();
e.MovePrevious();
e.GetCurrentItem().Should().Be(2);
e.MoveNext();
e.GetCurrentItem().Should().Be(0);
e.MoveNext();
e.GetCurrentItem().Should().Be(1);
e.MoveNext();
e.GetCurrentItem().Should().Be(2);
e.MoveNext();
e.GetCurrentItem().Should().Be(0);
}
private void ReplaceCurrentTokenWithCompletion(bool reverseOrder, bool lastOperationWasCompletion)
{
if (TokenCompleter == null)
{
return;
}
// If we can't pull a completion from the cache, then generate new ones.
if (!lastOperationWasCompletion || (_lastCompletions == null))
{
_lastCompletions = TokenCompletionSet.Create(Buffer.Contents, Buffer.CursorIndex, TokenCompleter);
_completionEnumerator = CircularEnumerator.Create(_lastCompletions.Completions);
}
// Bail if no completions are available.
if (_lastCompletions.Empty)
{
return;
}
// Find the existing token length.
var existingTokenLength = _completionEnumerator.Started
? _completionEnumerator.GetCurrentItem().Length
: _lastCompletions.OriginalToken.InnerLength;
// Find the existing token start.
var existingTokenStart =
_lastCompletions.OriginalToken.InnerStartingOffset;
// Select the new completion.
if (reverseOrder)
{
_completionEnumerator.MovePrevious();
}
else
{
_completionEnumerator.MoveNext();
}
// Select the completion.
var completion = _completionEnumerator.GetCurrentItem();
// Replace the current token in the buffer with the completion.
MoveConsoleAndBufferCursors(SeekOrigin.Begin, existingTokenStart);
Buffer.Remove(existingTokenLength);
Buffer.Insert(completion);
// Rewrite the input text.
SyncBufferToConsole(
existingTokenStart,
Buffer.Length - existingTokenStart,
(existingTokenLength > completion.Length) ? existingTokenLength - completion.Length : 0);
MoveConsoleAndBufferCursors(SeekOrigin.Current, completion.Length);
}
public void EnumerateEmptyList()
{
var list = new string[] { };
var e = CircularEnumerator.Create(list);
e.Should().NotBeNull();
e.CursorIndex.Should().NotHaveValue();
e.Values.Should().BeSameAs(list);
e.Started.Should().BeFalse();
Action currentItem = () => { var x = e.CurrentItem; };
currentItem.ShouldThrow <IndexOutOfRangeException>();
e.MoveNext();
currentItem.ShouldThrow <IndexOutOfRangeException>();
e.MovePrevious();
currentItem.ShouldThrow <IndexOutOfRangeException>();
}