osr-discourse-src/app/assets/javascripts/discourse/tests/integration/components/highlighted-code-test.js

import componentTest, {
  setupRenderingTest,
} from "discourse/tests/helpers/component-test";
import {
  discourseModule,
  queryAll,
} from "discourse/tests/helpers/qunit-helpers";
import hbs from "htmlbars-inline-precompile";

const LONG_CODE_BLOCK = "puts a\n".repeat(15000);

discourseModule("Integration | Component | highlighted-code", function (hooks) {
  setupRenderingTest(hooks);

  componentTest("highlighting code", {
    template: hbs`{{highlighted-code lang='ruby' code=code}}`,

    beforeEach() {
      this.session.highlightJsPath =
        "assets/highlightjs/highlight-test-bundle.min.js";
      this.set("code", "def test; end");
    },

    test(assert) {
      assert.equal(
        queryAll("code.ruby.hljs .hljs-function .hljs-keyword").text().trim(),
        "def"
      );
    },
  });

  componentTest("large code blocks are not highlighted", {
    template: hbs`{{highlighted-code lang='ruby' code=code}}`,

    beforeEach() {
      this.session.highlightJsPath =
        "assets/highlightjs/highlight-test-bundle.min.js";
      this.set("code", LONG_CODE_BLOCK);
    },

    test(assert) {
      assert.equal(queryAll("code").text().trim(), LONG_CODE_BLOCK.trim());
    },
  });
});