LayoutTests/fast/media/media-query-list-listener.html - Issue 347423010: Add a test for matchMedia listeners.

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Side by Side Diff: LayoutTests/fast/media/media-query-list-listener.html

Issue 347423010: Add a test for matchMedia listeners. (Closed) Base URL: svn://svn.chromium.org/blink/trunk

Patch Set: Created 6 years, 6 months ago

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	1 <!DOCTYPE html>

	2 <script src="../../resources/js-test.js"></script>

	3

	4 <div id="sandbox"></div>

	5

	6 <script>

	7 description("Media query listeners should fire on changes to matches status. ");

	8

	9 if (window.testRunner)

	10 testRunner.dumpAsText();

	11

	12 var sandbox = document.getElementById("sandbox");

	13 var iframe = document.createElement("iframe");

	14 sandbox.appendChild(iframe);

	15

	16 var matchMedia = iframe.contentWindow.matchMedia;

	17 var mediaList = matchMedia("(max-width: 100px)");

	18 var expectedValue = "";

	19

	20 function listener(list) {

	21 window.mediaListArgument = list;

	22 shouldBe("mediaList", "mediaListArgument");

	23 shouldBe("mediaList.matches", expectedValue);

	24 }

	25

	26 mediaList.addListener(listener);

	27

	28 shouldBe("mediaList.matches", "true");

	29

	30 // FIXME: You shouldn't need to touch offsetTop to force these updates.

	31

	32 // Should fire.

	33 iframe.style.width = "200px";

	34 expectedValue = "false";

	35 iframe.offsetTop;

	36

	37 // Should not fire.

	38 iframe.style.width = "250px";

	39 expectedValue = "false";

	40 iframe.offsetTop;

	41

	42 // Should fire.

	43 iframe.style.width = "80px";

	44 expectedValue = "true";

	45 iframe.offsetTop;

	46

	47 // Should not fire.

	48 mediaList.removeListener(listener);

	49 iframe.style.width = "200px";

	50 iframe.offsetTop;

	51 shouldBe("mediaList.matches", "false");

	52 </script>

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