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+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Validate Interfaces Exposed to Workers</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<script class="testbody" type="text/javascript">
+  SimpleTest.waitForExplicitFinish();
+
+  SpecialPowers.pushPrefEnv({
+    "set": [["dom.caches.enabled", true],
+            ["dom.caches.testing.enabled", true]],
+  }, function() {
+    // attach to a different origin's CacheStorage
+    var url = "https://example.com/";
+    var storage = SpecialPowers.createChromeCache("content", url);
+
+    // verify we can use the other origin's CacheStorage as normal
+    var req = new Request("https://example.com/index.html");
+    var res = new Response("hello world");
+    var cache;
+    storage.open("foo").then(function(c) {
+      cache = c;
+      ok(cache, "storage should create cache");
+      return cache.put(req, res.clone());
+    }).then(function() {
+      return cache.match(req);
+    }).then(function(foundResponse) {
+      return Promise.all([res.text(), foundResponse.text()]);
+    }).then(function(results) {
+      is(results[0], results[1], "cache should contain response");
+      return storage.delete("foo");
+    }).then(function(deleted) {
+      ok(deleted, "storage should delete cache");
+      SimpleTest.finish();
+    });
+  });
+</script>
+</body>
+</html>