File: test_videocontrols_vtt.html

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<!doctype html>
<html>
  <head>
    <title>Video controls test - VTT</title>
    <script src="/tests/SimpleTest/SimpleTest.js"></script>
    <script src="/tests/SimpleTest/EventUtils.js"></script>
    <script type="text/javascript" src="head.js"></script>
    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
  </head>
  <body>
    <p id="display"></p>

    <div id="content">
      <video id="video" controls preload="auto"></video>
    </div>

    <script clas="testbody" type="application/javascript">
      SimpleTest.waitForExplicitFinish();

      const video = document.getElementById("video");
      const ccBtn = getElementWithinVideo(video, "closedCaptionButton");
      const ttList = getElementWithinVideo(video, "textTrackList");
      const ttListContainer = getElementWithinVideo(
        video,
        "textTrackListContainer"
      );

      add_task(async function wait_for_media_ready() {
        await SpecialPowers.pushPrefEnv({ set: [["media.cache_size", 40000]] });
        await new Promise(resolve => {
          video.src = "seek_with_sound.webm";
          video.addEventListener("loadedmetadata", resolve);
        });
      });

      add_task(async function check_inital_state() {
        ok(ccBtn.hidden, "CC button should hide");
      });

      add_task(async function check_unsupported_type_added() {
        video.addTextTrack("descriptions", "English", "en");
        video.addTextTrack("chapters", "English", "en");
        video.addTextTrack("metadata", "English", "en");

        await new Promise(SimpleTest.executeSoon);
        ok(
          ccBtn.hidden,
          "CC button should hide if no supported tracks provided"
        );
      });

      add_task(async function check_cc_button_present() {
        const sub = video.addTextTrack("subtitles", "English", "en");
        sub.mode = "disabled";

        await new Promise(SimpleTest.executeSoon);
        ok(!ccBtn.hidden, "CC button should show");
        is(
          ccBtn.hasAttribute("enabled"),
          false,
          "CC button should be disabled"
        );
      });

      add_task(async function check_cc_button_be_enabled() {
        const subtitle = video.addTextTrack("subtitles", "English", "en");
        subtitle.mode = "showing";

        await new Promise(SimpleTest.executeSoon);
        ok(ccBtn.hasAttribute("enabled"), "CC button should be enabled");
        subtitle.mode = "disabled";
      });

      add_task(async function check_cpations_type() {
        const caption = video.addTextTrack("captions", "English", "en");
        caption.mode = "showing";

        await new Promise(SimpleTest.executeSoon);
        ok(ccBtn.hasAttribute("enabled"), "CC button should be enabled");
      });

      add_task(async function check_track_ui_state() {
        synthesizeMouseAtCenter(ccBtn, {});

        await new Promise(SimpleTest.executeSoon);
        ok(!ttListContainer.hidden, "Texttrack menu should show up");
        ok(
          ttList.lastChild.getAttribute("aria-checked") === "true",
          "The last added item should be highlighted"
        );
      });

      add_task(async function check_select_texttrack() {
        const tt = ttList.children[1];

        ok(
          tt.getAttribute("aria-checked") === "false",
          "Item should be off before click"
        );
        synthesizeMouseAtCenter(tt, {});

        await once(video.textTracks, "change");
        await new Promise(SimpleTest.executeSoon);
        ok(
          tt.getAttribute("aria-checked") === "true",
          "Selected item should be enabled"
        );
        ok(
          ttListContainer.hidden,
          "Should hide texttrack menu once clicked on an item"
        );
      });

      add_task(async function check_change_texttrack_mode() {
        const tts = [...video.textTracks];

        tts.forEach(tt => (tt.mode = "hidden"));
        await once(video.textTracks, "change");
        await new Promise(SimpleTest.executeSoon);
        ok(!ccBtn.hasAttribute("enabled"), "CC button should be disabled");

        // enable the last text track.
        tts[tts.length - 1].mode = "showing";
        await once(video.textTracks, "change");
        await new Promise(SimpleTest.executeSoon);
        ok(ccBtn.hasAttribute("enabled"), "CC button should be enabled");
        ok(
          ttList.lastChild.getAttribute("aria-checked") === "true",
          "The last item should be highlighted"
        );
      });
    </script>
  </body>
</html>