marko/packages/runtime-class/test/components-browser/fixtures/textarea/test.js

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

module.exports = function (helpers) {
  var component = helpers.mount(require.resolve("./index.marko"));

  expect(component.el.querySelector("pre").innerHTML).to.equal("");

  component.submit();
  component.update();

  expect(component.el.querySelector("pre").innerHTML).to.equal(
    "Placeholder error",
  );
};