gecko-dev/dom/events/test/test_bug1709832.html

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HTML

<!DOCTYPE html>
<meta charset="utf-8">
<title>Test for Bug 1709832</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css" />
<style>
@font-face {
font-family: Ahem;
src: url("/tests/dom/base/test/Ahem.ttf");
}
#container {
font: 16px/1 Ahem;
}
</style>
<div id="container">
<span id="start" draggable="true">start</span><span id="dest" draggable="true">dest</span>
</div>
<script>
SimpleTest.waitForExplicitFinish();
dest.addEventListener("dragenter", ev => {
is(ev.target, dest, "dragenter target should be element");
is(ev.relatedTarget, start, "dragenter relatedTarget should be element");
});
start.addEventListener("dragleave", ev => {
is(ev.target, start, "dragleave target should be element");
is(ev.relatedTarget, dest, "dragleave relatedTarget should be element");
SimpleTest.finish();
});
synthesizeMouse(start, 5, 5, { type: "mousedown" });
const utils = SpecialPowers.getDOMWindowUtils(window);
// Intentionally passing a text node to test EventStateManager behavior
// when GetContentForEvent gives a text node
// EventUtils.sendDragEvent is unusable because it requires an element as a target
utils.dispatchDOMEventViaPresShellForTesting(start.childNodes[0], new DragEvent("dragover", {
...createDragEventObject("dragover", start, window, null, {})
}));
utils.dispatchDOMEventViaPresShellForTesting(dest.childNodes[0], new DragEvent("dragover", {
...createDragEventObject("dragover", dest, window, null, {})
}));
</script>