protected void AssertTransition <TStartPositionNode, TExpectedState>(
ActionKind action,
Func <TStartPositionNode, bool>?startNodePredicate = null,
Action <TExpectedState>?stateAssert = null,
Func <TStartPositionNode, FileLinePositionSpan>?startPositionFunctor = null,
Action <LocalContext>?preJumpAction = null)
where TStartPositionNode : SyntaxNode
where TExpectedState : LocalContextState
{
var context = new LocalContext(this.SyntaxTree);
TStartPositionNode?node = this.SyntaxTree.GetRoot().ChildNodes()
.GetNodesOfTypeRecursively <TStartPositionNode>()
.Where(x => startNodePredicate == null || startNodePredicate(x))
.First();
SyntaxNode startNode = node;
(int lineStart, int lineEnd, int charStart, int charEnd) =
startNode.GetSourceTextBounds();
if (startPositionFunctor != null)
{
FileLinePositionSpan line = startPositionFunctor(node);
lineStart = line.StartLinePosition.Line;
charStart = line.StartLinePosition.Character;
}
context.TransitionTo(lineStart, charStart);
preJumpAction?.Invoke(context);
switch (action)
{
case ActionKind.JumpNext:
context.State.JumpNext();
break;
case ActionKind.JumpPrev:
context.State.JumpPrev();
break;
case ActionKind.JumpNextSibling:
context.State.JumpToNextSiblingContext();
break;
case ActionKind.JumpPrevSibling:
context.State.JumpToPrevSiblingContext();
break;
case ActionKind.JumpContextUp:
context.State.JumpContextUp();
break;
case ActionKind.JumpContextDown:
context.State.JumpContextDown();
break;
default:
throw new ArgumentException("Unknown action kind.", nameof(action));
}
Assert.IsType <TExpectedState>(context.State);
stateAssert?.Invoke((TExpectedState)context.State);
}
