public void Analyze_Parentheses_ReturnsParenthesesNode()
        {
            Environment environment = new Environment();

            environment.AddSymbol("x");
            SyntaxNode root = new ParenthesesNode(new IdentifierNode("x"));

            root = SemanticAnalyzer.Analyze(root, environment);

            Assert.AreEqual("(x)", root.ToString());
        }