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+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>Test for bug 1730284 (throttling of same-origin iframes)</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css">
+<style>
+ iframe {
+ width: 10px;
+ height: 10px;
+ }
+ .display-none {
+ display: none;
+ }
+ .vis-hidden {
+ visibility: hidden
+ }
+ .transparent {
+ opacity: 0;
+ }
+ .zero-size {
+ width: 0;
+ height: 0;
+ border: 0;
+ }
+ .offscreen {
+ position: absolute;
+ top: 500%;
+ }
+ .scroller {
+ height: 100px;
+ overflow: auto;
+ }
+ .scroller-padding {
+ height: 500px;
+ }
+</style>
+<iframe class="visible"></iframe>
+<iframe class="display-none" data-throttled-expected></iframe>
+<iframe class="vis-hidden"></iframe>
+<iframe class="transparent"></iframe>
+<iframe class="zero-size"></iframe>
+<div class="scroller">
+ <div class="scroller-padding"></div>
+ <iframe class="scrolled-out-of-view" data-throttled-expected></iframe>
+</div>
+<iframe class="offscreen" data-throttled-expected></iframe>
+<iframe class="offscreen zero-size" data-throttled-expected></iframe>
+<iframe class="offscreen vis-hidden" data-throttled-expected></iframe>
+<iframe class="offscreen transparent" data-throttled-expected></iframe>
+<script>
+async function assertThrottled(win, shouldThrottle, msg) {
+ if (isXOrigin) {
+ // In XOrigin mode we need to depend as well on the main process having
+ // painted the cross-origin iframe at least once for coordinates to be
+ // correct.
+ await SimpleTest.promiseWaitForCondition(() => {
+ return SpecialPowers.getDOMWindowUtils(win).effectivelyThrottlesFrameRequests == shouldThrottle;
+ }, msg);
+ }
+ is(SpecialPowers.getDOMWindowUtils(win).effectivelyThrottlesFrameRequests, shouldThrottle, msg);
+}
+
+add_task(async function() {
+ await SimpleTest.promiseFocus(window);
+ await assertThrottled(window, false, "Should not be throttling main page");
+ for (let frame of document.querySelectorAll("iframe")) {
+ let shouldThrottle = frame.getAttribute("data-throttled-expected") !== null;
+ await assertThrottled(frame.contentWindow, shouldThrottle, frame.className);
+ }
+});
+</script>