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+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1414077
+-->
+<head>
+<meta charset="utf-8">
+<title>Test for Bug 1414077</title>
+<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
+<script type="application/javascript">
+
+/** Test for Bug 1414077 **/
+
+add_task(async function() {
+ await SpecialPowers.pushPrefEnv({"set": [["browser.enable_automatic_image_resizing", true]]});
+
+ return new Promise(resolve => {
+ var testWin = document.querySelector("iframe");
+ testWin.src = "image.png";
+ testWin.onload = function() {
+ var testDoc = testWin.contentDocument;
+
+ // testDoc should be a image document.
+ ok(testDoc.imageIsOverflowing, "image is overflowing");
+ ok(testDoc.imageIsResized, "image is resized to fit visible area by default");
+
+ // Restore image to original size.
+ testDoc.restoreImage();
+ ok(testDoc.imageIsOverflowing, "image is overflowing");
+ ok(!testDoc.imageIsResized, "image is restored to original size");
+
+ // Resize the image to fit visible area
+ testDoc.shrinkToFit();
+ ok(testDoc.imageIsOverflowing, "image is overflowing");
+ ok(testDoc.imageIsResized, "image is resized to fit visible area");
+
+ resolve();
+ };
+ })
+});
+
+</script>
+</head>
+
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1414077">Mozilla Bug 1414077</a>
+<iframe width="0" height="0"></iframe>
+</body>
+</html>