AjErl.Tests.Compiler.ParserTests.ParseAddMultiplyWithParens C# (CSharp) Метод

        public void ParseAddMultiplyWithParens()
        {
            Parser parser = new Parser("(2+3)*4.");

            IExpression expression = parser.ParseExpression();

            Assert.IsNotNull(expression);
            Assert.IsInstanceOfType(expression, typeof(MultiplyExpression));

            MultiplyExpression multexpression = (MultiplyExpression)expression;

            Assert.IsInstanceOfType(multexpression.RightExpression, typeof(ConstantExpression));
            Assert.AreEqual(4, ((ConstantExpression)multexpression.RightExpression).Value);

            Assert.IsInstanceOfType(multexpression.LeftExpression, typeof(AddExpression));

            AddExpression addexpression = (AddExpression)multexpression.LeftExpression;

            Assert.IsInstanceOfType(addexpression.LeftExpression, typeof(ConstantExpression));
            Assert.IsInstanceOfType(addexpression.RightExpression, typeof(ConstantExpression));

            Assert.AreEqual(2, ((ConstantExpression)addexpression.LeftExpression).Value);
            Assert.AreEqual(3, ((ConstantExpression)addexpression.RightExpression).Value);

            Assert.IsNull(parser.ParseExpression());
        }