1 files changed, 45 insertions, 0 deletions
diff --git a/dom/tests/browser/browser_allocateGigabyte.js b/dom/tests/browser/browser_allocateGigabyte.js
new file mode 100644
index 0000000000..602dbd791b
--- /dev/null
+++ b/dom/tests/browser/browser_allocateGigabyte.js
@@ -0,0 +1,45 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const TEST_URI =
+  "http://example.com/browser/dom/tests/browser/test_largeAllocation.html";
+
+function expectProcessCreated() {
+  let os = Services.obs;
+  return new Promise(resolve => {
+    let topic = "ipc:content-created";
+    function observer() {
+      os.removeObserver(observer, topic);
+      ok(true, "Expect process created");
+      resolve();
+    }
+    os.addObserver(observer, topic);
+  });
+}
+
+add_task(async function() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.largeAllocationHeader.enabled", true]],
+  });
+
+  // A toplevel tab should be able to navigate cross process!
+  await BrowserTestUtils.withNewTab("about:blank", async function(aBrowser) {
+    let epc = expectProcessCreated();
+    await SpecialPowers.spawn(aBrowser, [TEST_URI], TEST_URI => {
+      content.document.location = TEST_URI;
+    });
+
+    // Wait for the new process to be created by the Large-Allocation header
+    await epc;
+
+    // Allocate a gigabyte of memory in the content process
+    await SpecialPowers.spawn(aBrowser, [], () => {
+      let arrayBuffer = new ArrayBuffer(1024 * 1024 * 1024);
+      ok(
+        arrayBuffer,
+        "Successfully allocated a gigabyte of memory in content process"
+      );
+    });
+  });
+});