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+<!DOCTYPE html>
+<html>
+<head>
+ <meta charset="utf-8">
+ <title>Tests for Cu.isRemoteProxy</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<script>
+
+async function addFrame(url) {
+ let frame = document.createElement("iframe");
+ frame.src = url;
+ document.body.appendChild(frame);
+
+ await new Promise(resolve => {
+ frame.addEventListener("load", resolve, { once: true });
+ });
+
+ return frame;
+}
+
+add_task(async function() {
+ const { Cu } = SpecialPowers;
+
+ let localFrame = await addFrame("file_empty.html");
+ let remoteFrame = await addFrame(
+ SimpleTest.getTestFileURL("file_empty.html")
+ .replace("mochi.test:8888", "example.com"));
+
+ ok(frames[0] === localFrame.contentWindow, "frames[0] is localFrame");
+ ok(frames[1] === remoteFrame.contentWindow, "frames[1] is remoteFrame");
+
+ ok(!Cu.isRemoteProxy(window), "window is not a remote proxy");
+ ok(!Cu.isRemoteProxy(location), "location is not a remote proxy");
+
+ ok(!Cu.isRemoteProxy(frames[0]), "frames[0] is not a remote proxy");
+ ok(
+ !Cu.isRemoteProxy(frames[0].location),
+ "frames[0].location is not a remote proxy"
+ );
+
+ // The processes will be remote only with isolateEverything strategy
+ const expected = SpecialPowers.effectiveIsolationStrategy() == SpecialPowers.ISOLATION_STRATEGY.IsolateEverything;
+
+ is(Cu.isRemoteProxy(frames[1]), expected,
+ "frames[1] is a remote proxy if Fission is enabled and strategy is isolateEverything");
+ is(Cu.isRemoteProxy(frames[1].location), expected,
+ "frames[1].location is a remote proxy if Fission is enabled and strategy is isolateEverything");
+});
+
+</script>
+</body>
+</html>