/**
* Tests the pattern empty matching detection.
*/
public void TestMatchingEmpty()
{
pattern = new ProductionPattern(P1, "P1");
alt = new ProductionPatternAlternative();
alt.AddProduction(P2, 0, -1);
alt.AddToken(T1, 0, 1);
alt.AddProduction(P1, 0, 1);
AddAlternative(pattern, alt);
AssertTrue(pattern.IsMatchingEmpty());
}