public void ParseOperatorArray()
{
ModelParser parser = new ModelParser("#(- +)");
IExpression expression = parser.ParseExpression();
Assert.IsNotNull(expression);
Assert.IsInstanceOfType(expression, typeof(ArrayExpression));
ArrayExpression cexpression = (ArrayExpression)expression;
Assert.AreEqual(2, cexpression.Expressions.Count());
Assert.IsInstanceOfType(cexpression.Expressions.First(), typeof(SymbolExpression));
Assert.IsInstanceOfType(cexpression.Expressions.Skip(1).First(), typeof(SymbolExpression));
Assert.AreEqual("#(- +)", expression.AsString());
}