Quelle test_media_query_list.html Sprache: HTML

products/sources/formale Sprachen/C/Firefox/layout/style/test/test_media_query_list.html

<!DOCTYPE HTML>
<html>

<head>
  <title>Test for MediaQueryList (Bug 542058)</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body onload="run()">
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=542058">Mozilla Bug 542058</a>
<iframe id="subdoc" src="about:blank"></iframe>
<div id="content" style="display:none"></div>
<pre id="test">
<script type="application/javascript">

/** Test for MediaQueryList (Bug 542058) **/

SimpleTest.waitForExplicitFinish();

function tick() {
  // MediaQueryList events are guaranteed to run before requestAnimationFrame
  // per spec.
  return new Promise(r => requestAnimationFrame(r));
}

async function run() {
  var iframe = document.getElementById("subdoc");
  var subdoc = iframe.contentDocument;
  var subwin = iframe.contentWindow;
  var subroot = subdoc.documentElement;

  var content_div = document.getElementById("content");
  content_div.style.font = "initial";
  var em_size =
    getComputedStyle(content_div).fontSize.match(/^(\d+)px$/)[1];

  var w = Math.floor(em_size * 9.3);
  var h = Math.floor(em_size * 4.2);
  iframe.style.width = w + "px";
  iframe.style.height = h + "px";
  subroot.offsetWidth; // flush layout
  await tick();

  function setup_mql(str) {
    var obj = {
      str: str,
      mql: subwin.matchMedia(str),
      notifyCount: 0,
      listener: function(event) {
                  ok(event instanceof subwin.MediaQueryListEvent,
                     "correct argument to listener: " + obj.str);
                  is(event.media, obj.mql.media,
                     "correct media in the event: " + obj.str);
                  is(event.target, obj.mql,
                     "correct target in the event: " + obj.str);
                  ++obj.notifyCount;
                  // Test the last match result only on odd
                  // notifications.
                  if (obj.notifyCount & 1) {
                    obj.lastOddMatchResult = event.target.matches;
                  }
                }
    }
    obj.mql.addListener(obj.listener);
    return obj;
  }

  function finish_mql(obj) {
    obj.mql.removeListener(obj.listener);
  }

  var w_exact_w = setup_mql("(width: " + w + "px)");
  var w_min_9em = setup_mql("(min-width : 9em)");
  var w_min_10em = setup_mql("( min-width: 10em ) ");
  var w_max_9em = setup_mql("(max-width: 9em)");
  var w_max_10em = setup_mql("(max-width: 10em)");

  is(w_exact_w.mql.media, "(width: " + w + "px)", "serialization");
  is(w_min_9em.mql.media, "(min-width: 9em)", "serialization");
  is(w_min_10em.mql.media, "(min-width: 10em)", "serialization");
  is(w_max_9em.mql.media, "(max-width: 9em)", "serialization");
  is(w_max_10em.mql.media, "(max-width: 10em)", "serialization");

  function check_match(obj, expected, desc) {
    is(obj.mql.matches, expected,
       obj.str + " media query list .matches " + desc);
    if (obj.notifyCount & 1) { // odd notifications only
      is(obj.lastOddMatchResult, expected,
       obj.str + " media query list last notify result " + desc);
    }
  }
  function check_notify(obj, expected, desc) {
    is(obj.notifyCount, expected,
       obj.str + " media query list .notify count " + desc);
  }
  check_match(w_exact_w, true, "initially");
  check_notify(w_exact_w, 0, "initially");
  check_match(w_min_9em, true, "initially");
  check_notify(w_min_9em, 0, "initially");
  check_match(w_min_10em, false, "initially");
  check_notify(w_min_10em, 0, "initially");
  check_match(w_max_9em, false, "initially");
  check_notify(w_max_9em, 0, "initially");
  check_match(w_max_10em, true, "initially");
  check_notify(w_max_10em, 0, "initially");

  var w2 = Math.floor(em_size * 10.3);
  iframe.style.width = w2 + "px";
  subroot.offsetWidth; // flush layout
  await tick();

  check_match(w_exact_w, false, "after width increase to around 10.3em");
  check_notify(w_exact_w, 1, "after width increase to around 10.3em");
  check_match(w_min_9em, true, "after width increase to around 10.3em");
  check_notify(w_min_9em, 0, "after width increase to around 10.3em");
  check_match(w_min_10em, true, "after width increase to around 10.3em");
  check_notify(w_min_10em, 1, "after width increase to around 10.3em");
  check_match(w_max_9em, false, "after width increase to around 10.3em");
  check_notify(w_max_9em, 0, "after width increase to around 10.3em");
  check_match(w_max_10em, false, "after width increase to around 10.3em");
  check_notify(w_max_10em, 1, "after width increase to around 10.3em");

  var w3 = w * 2;
  iframe.style.width = w3 + "px";
  subroot.offsetWidth; // flush layout
  await tick();

  check_match(w_exact_w, false, "after width double from original");
  check_notify(w_exact_w, 1, "after width double from original");
  check_match(w_min_9em, true, "after width double from original");
  check_notify(w_min_9em, 0, "after width double from original");
  check_match(w_min_10em, true, "after width double from original");
  check_notify(w_min_10em, 1, "after width double from original");
  check_match(w_max_9em, false, "after width double from original");
  check_notify(w_max_9em, 0, "after width double from original");
  check_match(w_max_10em, false, "after width double from original");
  check_notify(w_max_10em, 1, "after width double from original");

  SpecialPowers.setFullZoom(subwin, 2.0);
  subroot.offsetWidth; // flush layout
  await tick();

  check_match(w_exact_w, true, "after zoom");
  check_notify(w_exact_w, 2, "after zoom");
  check_match(w_min_9em, true, "after zoom");
  check_notify(w_min_9em, 0, "after zoom");
  check_match(w_min_10em, false, "after zoom");
  check_notify(w_min_10em, 2, "after zoom");
  check_match(w_max_9em, false, "after zoom");
  check_notify(w_max_9em, 0, "after zoom");
  check_match(w_max_10em, true, "after zoom");
  check_notify(w_max_10em, 2, "after zoom");

  SpecialPowers.setFullZoom(subwin, 1.0);

  await tick();

  finish_mql(w_exact_w);
  finish_mql(w_min_9em);
  finish_mql(w_min_10em);
  finish_mql(w_max_9em);
  finish_mql(w_max_10em);

  // Additional tests of listener mutation.
  {
    let received = [];
    let received_mql = [];
    function listener1(event) {
      received.push(1);
      received_mql.push(event.target);
    }
    function listener2(event) {
      received.push(2);
      received_mql.push(event.target);
    }

    iframe.style.width = "200px";
    subroot.offsetWidth; // flush layout
    await tick();

    let mql = subwin.matchMedia("(min-width: 150px)");
    mql.addListener(listener1);
    mql.addListener(listener1);
    mql.addListener(listener2);
    is(JSON.stringify(received), "[]", "listeners before notification");

    iframe.style.width = "100px";
    subroot.offsetWidth; // flush layout
    await tick();

    is(JSON.stringify(received), "[1,2]", "duplicate listeners removed");
    received = [];
    mql.removeListener(listener1);

    iframe.style.width = "200px";
    subroot.offsetWidth; // flush layout
    await tick();

    is(JSON.stringify(received), "[2]", "listener removal");
    received = [];
    mql.addListener(listener1);

    iframe.style.width = "100px";
    subroot.offsetWidth; // flush layout
    await tick();

    is(JSON.stringify(received), "[2,1]", "listeners notified in order");
    received = [];
    mql.addListener(listener2);

    iframe.style.width = "200px";
    subroot.offsetWidth; // flush layout
    await tick();

    is(JSON.stringify(received), "[2,1]", "add of existing listener is no-op");
    received = [];
    mql.addListener(listener1);

    iframe.style.width = "100px";
    subroot.offsetWidth; // flush layout
    await tick();

    is(JSON.stringify(received), "[2,1]", "add of existing listener is no-op");
    mql.removeListener(listener2);
    received = [];
    received_mql = [];

    var mql2 = subwin.matchMedia("(min-width: 160px)");
    mql2.addListener(listener1);
    mql.addListener(listener2);

    iframe.style.width = "200px";
    subroot.offsetWidth; // flush layout
    await tick();

    // mql (1, 2), mql2 (1)
    is(JSON.stringify(received), "[1,2,1]",
       "notification of lists in order created");
    is(received_mql[0], mql,
       "notification of lists in order created");
    is(received_mql[1], mql,
       "notification of lists in order created");
    is(received_mql[2], mql2,
       "notification of lists in order created");
    received = [];
    received_mql = [];

    function removing_listener(event) {
      received.push(3);
      received_mql.push(event.target);
      event.target.removeListener(listener2);
      mql2.removeListener(listener1);
    }

    mql.addListener(removing_listener);
    mql.removeListener(listener2);
    mql.addListener(listener2); // after removing_listener (3)

    iframe.style.width = "100px";
    subroot.offsetWidth; // flush layout
    await tick();

    // mql(1, 3)
    is(JSON.stringify(received), "[1,3]",
       "listeners still notified after removed if change was before");
    is(received_mql[0], mql,
       "notification order (removal tests)");
    is(received_mql[1], mql,
       "notification order (removal tests)");
    received = [];
    received_mql = [];

    iframe.style.width = "200px";
    subroot.offsetWidth; // flush layout
    await tick();

    // mql(1, 3)
    is(JSON.stringify(received), "[1,3]",
       "listeners not notified for changes after their removal");
    is(received_mql[0], mql,
       "notification order (removal tests)");
    is(received_mql[1], mql,
       "notification order (removal tests)");
  }

  /* Bug 753777: test that things work in a freshly-created iframe */
  {
    let newIframe = document.createElement("iframe");
    document.body.appendChild(newIframe);

    is(newIframe.contentWindow.matchMedia("all").matches, true,
       "matchMedia should work in newly-created iframe");
    is(newIframe.contentWindow.matchMedia("(min-width: 1px)").matches, true,
       "(min-width: 1px) should match in newly-created iframe");
    is(newIframe.contentWindow.matchMedia("(max-width: 1px)").matches, false,
       "(max-width: 1px) should not match in newly-created iframe");

    document.body.removeChild(newIframe);
  }

  /* Bug 716751: listeners lost due to GC */
  var gc_received = [];
  {
    let received = [];
    let listener1 = function(event) {
      gc_received.push(1);
    }

    iframe.style.width = "200px";
    subroot.offsetWidth; // flush layout
    await tick();

    let mql = subwin.matchMedia("(min-width: 150px)");
    mql.addListener(listener1);
    is(JSON.stringify(gc_received), "[]", "GC test: before notification");

    iframe.style.width = "100px";
    subroot.offsetWidth; // flush layout
    await tick();

    is(JSON.stringify(gc_received), "[1]", "GC test: after notification 1");

    // Because of conservative GC, we need to go back to the event loop
    // to GC properly.
    setTimeout(step2, 0);
  }

  async function step2() {
    SpecialPowers.DOMWindowUtils.garbageCollect();

    iframe.style.width = "200px";
    subroot.offsetWidth; // flush layout
    await tick();

    is(JSON.stringify(gc_received), "[1,1]", "GC test: after notification 2");

    bug1270626();
  }

  /* Bug 1270626: listeners that throw exceptions */
  async function bug1270626() {
    var throwingListener = function(event) {
      throw "error";
    }

    iframe.style.width = "200px";
    subroot.offsetWidth; // flush layout
    await tick();

    var mql = subwin.matchMedia("(min-width: 150px)");
    mql.addListener(throwingListener);

    SimpleTest.expectUncaughtException(true);
    is(SimpleTest.isExpectingUncaughtException(), true,
       "should be waiting for an uncaught exception");

    iframe.style.width = "100px";
    subroot.offsetWidth; // flush layout
    await tick();

    is(SimpleTest.isExpectingUncaughtException(), false,
       "should have gotten an uncaught exception");

    SimpleTest.finish();
  }
}

</script>
</pre>
</body>
</html>

Messung V0.5

¤ Dauer der Verarbeitung: 0.27 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.