discourse/plugins/chat/test/javascripts/components/chat-thread-header-test.js

import { render } from "@ember/test-helpers";
import hbs from "htmlbars-inline-precompile";
import { module, test } from "qunit";
import { setupRenderingTest } from "discourse/tests/helpers/component-test";
import { query } from "discourse/tests/helpers/qunit-helpers";
import fabricators from "discourse/plugins/chat/discourse/lib/fabricators";

module("Discourse Chat | Component | chat-thread-header", function (hooks) {
  setupRenderingTest(hooks);

  test("it safely renders title", async function (assert) {
    const title = "<style>body { background: red;}</style>";
    this.thread = fabricators.thread({ title });

    await render(hbs`
      <Chat::Thread::Header @thread={{this.thread}} @channel={{this.thread.channel}} />
    `);

    assert.ok(
      query(".c-navbar__title")
        .innerHTML.trim()
        .includes("&lt;style&gt;body { background: red;}&lt;/style&gt;")
    );
  });
});