old_contents: "use strict";
  
  import { expect } from "chai";
  
  import PngCrop = from "../src/croppng";
  
  describe("croppng", function () {
    it("exists", function (done) {
      expect(!PngCrop).to.equal(false);
      done();
    });
  });
  
new_contents: "use strict";
  
  import { expect } from "chai";
  
  import PNG from "../src/cropng";
  
  describe("croppng", function () {
    it("exists", function (done) {
      expect(!PNG).to.equal(false);
      done();
    });
  });
  
subject: fix generated test