window['$BENCH'].render = function() {
  let { env, context, template, TestDynamicScope } = this;
  let frag = document.createDocumentFragment();
  env.begin();
  template.render(context, env, { appendTo: frag, dynamicScope: new TestDynamicScope(null) });
  env.commit();
  return frag;
};

test("Morphs are escaped correctly", function() {
  env.registerHelper('testing-unescaped', function(params) {
    return params[0];
  });

  env.registerHelper('testing-escaped', function(params, hash) {
    return params[0];
  });

  compilesTo('<div>{{{testing-unescaped "<span>hi</span>"}}}</div>', '<div><span>hi</span></div>');
  compilesTo('<div>{{testing-escaped "<hi>"}}</div>', '<div>&lt;hi&gt;</div>');
});

function rerender(context: Object = {}, params: RerenderParams = { assertStable: false }) {
  let snapshot;
  if (params.assertStable) {
    snapshot = generateSnapshot(root);
  }
  self.update(opaque(context));
  env.begin();
  result.rerender();
  env.commit();
  if (params.assertStable) {
    equalSnapshots(generateSnapshot(root), snapshot);
  }
}

QUnit.test('changing dynamic partial and changing references', assert => {
  let template = compile(`{{partial name}}`);

  env.registerPartial('weezy', `Ain't my birthday but I got my {{item}} on the cake.`);
  env.registerPartial('birdman', `Respeck my {{noun}}. When my {{noun}} come up put some respeck on it.`);
  render(template, { name: 'weezy', item: 'partial' });

  equalTokens(root, `Ain't my birthday but I got my partial on the cake.`);
  rerender({ name: 'birdman', noun: 'name' });
  equalTokens(root, `Respeck my name. When my name come up put some respeck on it.`);
  rerender({ name: 'birdman', noun: 'name' }, { assertStable: true });
  equalTokens(root, `Respeck my name. When my name come up put some respeck on it.`);
});

test("GH#13999 The compiler can handle components with undefined named arguments", function() {
  env.registerHelper('say-hello', function() {
    return 'hello';
  });

  compilesTo('<div>{{say-hello foo=undefined}}</div>', '<div>hello</div>');
});