marko/packages/runtime-class/test/components-browser/fixtures/event-attach-el-once/test.js

var expect = require("chai").expect;

module.exports = function (helpers) {
  var component = helpers.mount(require.resolve("./index"), {
    colors: ["red"],
  });

  // When hydrating, the first color item was rendered on the
  // server so there is no corresponding attach event fired
  var OFFSET = helpers.isHydrate ? -1 : 0;

  expect(component.numberOfInvocations).to.equal(OFFSET + 1);

  component.input = {
    colors: ["red", "blue"],
  };
  component.update();

  expect(component.numberOfInvocations).to.equal(OFFSET + 2);

  component.input = {
    colors: ["red", "green", "blue"],
  };
  component.update();

  expect(component.numberOfInvocations).to.equal(OFFSET + 3);
};