public void ParseSimpleMatch()
{
Parser parser = new Parser("X=ok.");
IExpression expression = parser.ParseExpression();
Assert.IsNotNull(expression);
Assert.IsInstanceOfType(expression, typeof(MatchExpression));
MatchExpression matchexpression = (MatchExpression)expression;
Assert.IsNotNull(matchexpression.LeftExpression);
Assert.IsNotNull(matchexpression.RightExpression);
Assert.IsNull(parser.ParseExpression());
}