text: /* */ 
  var expressions = require('../src/expressions'),
      equal = require('assert').equal;
  describe('azure-odata-sql.expressions', function() {
    it("constant expression test", function() {
      var constExpr = new expressions.Constant('hello');
      equal(constExpr.value, 'hello');
      equal(constExpr.expressionType, 'Constant');
    });
    it("basic expression tree test", function() {
      var p = new expressions.Parameter();
      var left = new expressions.Member(p, 'user');
      var right = new expressions.Constant('mathewc');
      var binExpr = new expressions.Binary(left, right, 'Equal');
      equal(binExpr.left.member, 'user');
      equal(binExpr.right.value, 'mathewc');
      equal(binExpr.expressionType, 'Equal');
    });
  });
  