text: var expect = require("chai").expect;
  
  module.exports = function (helpers) {
      var component = helpers.mount(require.resolve("./index"), {
          colors: ["red", "green", "blue"]
      });
  
      expect(component.numberOfInvocations).to.equal(0);
  
      component.input = {
          colors: ["red", "blue"]
      };
      component.update();
  
      expect(component.numberOfInvocations).to.equal(1);
  
      component.input = {
          colors: ["red"]
      };
      component.update();
  
      expect(component.numberOfInvocations).to.equal(2);
  };