old_contents: gcd = require('../src/helper').gcd;
  lcm = require('../src/helper').lcm;
  isInt = require('../src/helper').isInt;
  round = require('../src/helper').round;
  
  describe("Greatest common divisor", function() {
      it("returns 1 when the arguments are 1 and 1", function() {
          var g = gcd(1, 1);
          expect(g).toEqual(1);
      });
  
      it("returns 2 when the arguments are 2 and 4", function() {
          var g = gcd(2, 4);
          expect(g).toEqual(2);
      });
  
      it("returns 1 when the arguments are 5 and 7", function() {
          var g = gcd(5, 7);
          expect(g).toEqual(1);
      })
  });
  
  describe("Least common multiple", function() {
      it("should return 12 if the arguments are 4 and 6", function() {
          expect(lcm(4, 6)).toEqual(12);
      });
  
      it("should return 15 if the arguments are 3 and 5", function() {
          expect(lcm(3, 5)).toEqual(15);
      });
  });
  
  describe("isInt", function() {
      it("should return false if it's a float", function() {
          expect(isInt(.5)).toBe(false);
      });
  
      it("should return false if it's a string", function() {
          expect(isInt("hi")).toBe(false);
      });
  
      it("should return false if it's undefined", function() {
          expect(isInt()).toBe(false);
      });
  
      it("should return true if it's an integer", function() {
          expect(isInt(4)).toBe(true);
      });
  });
  
  describe("round", function() {
      it("should round integers to themselves", function() {
          expect(round(5)).toEqual(5.00);
      });
  
      it("should round to 2 decimal places by default", function() {
          expect(round(5.555)).toEqual(5.56);
      });
  
      it("should round to 0 decimal places correctly", function() {
          expect(round(5.55, 0)).toEqual(6);
      });
  
      it("should round to 1 decimal places correctly", function() {
          expect(round(5.55, 1)).toEqual(5.6);
      });
  
      it("should equal itself when rounding to decimal places beyond what's necessary", function() {
          expect(round(5.55, 4)).toEqual(5.55);
      });
  });
  
  describe("Numbers to tex", function() {
      it("should return numbers as strings", function() {
          var x = new Number(5.55);
          expect(x.toTex()).toEqual(x.toString());
      })
  });
new_contents: gcd = require('../src/helper').gcd;
  lcm = require('../src/helper').lcm;
  isInt = require('../src/helper').isInt;
  round = require('../src/helper').round;
  
  describe("Greatest common divisor", function() {
      it("returns 1 when the arguments are 1 and 1", function() {
          var g = gcd(1, 1);
          expect(g).toEqual(1);
      });
  
      it("returns 2 when the arguments are 2 and 4", function() {
          var g = gcd(2, 4);
          expect(g).toEqual(2);
      });
  
      it("returns 1 when the arguments are 5 and 7", function() {
          var g = gcd(5, 7);
          expect(g).toEqual(1);
      });
  });
  
  describe("Least common multiple", function() {
      it("should return 12 if the arguments are 4 and 6", function() {
          expect(lcm(4, 6)).toEqual(12);
      });
  
      it("should return 15 if the arguments are 3 and 5", function() {
          expect(lcm(3, 5)).toEqual(15);
      });
  });
  
  describe("isInt", function() {
      it("should return false if it's a float", function() {
          expect(isInt(0.5)).toBe(false);
      });
  
      it("should return false if it's a string", function() {
          expect(isInt("hi")).toBe(false);
      });
  
      it("should return false if it's undefined", function() {
          expect(isInt()).toBe(false);
      });
  
      it("should return true if it's an integer", function() {
          expect(isInt(4)).toBe(true);
      });
  });
  
  describe("round", function() {
      it("should round integers to themselves", function() {
          expect(round(5)).toEqual(5.00);
      });
  
      it("should round to 2 decimal places by default", function() {
          expect(round(5.555)).toEqual(5.56);
      });
  
      it("should round to 0 decimal places correctly", function() {
          expect(round(5.55, 0)).toEqual(6);
      });
  
      it("should round to 1 decimal places correctly", function() {
          expect(round(5.55, 1)).toEqual(5.6);
      });
  
      it("should equal itself when rounding to decimal places beyond what's necessary", function() {
          expect(round(5.55, 4)).toEqual(5.55);
      });
  });
subject: Fix lint errors in helper-spec.js