private void Math(Scope scope, object left, object right, Operator op, double expected)
{
Expression expLeft = (left.GetType() == typeof(string))
? (Expression) new VariableExpression(left.ToString(), scope)
: (Expression) new ConstantExpression(left);
Expression expRight = (right.GetType() == typeof(string))
? (Expression) new VariableExpression(right.ToString(), scope)
: (Expression) new ConstantExpression(right);
var exp = new BinaryExpression(expLeft, op, expRight);
Assert.AreEqual(expected, exp.EvaluateAs <double>());
}
