1 files changed, 62 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/xpcshell/test_ext_contentscript_xorigin_frame.js b/toolkit/components/extensions/test/xpcshell/test_ext_contentscript_xorigin_frame.js
new file mode 100644
index 0000000000..8a58b2475c
--- /dev/null
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_contentscript_xorigin_frame.js
@@ -0,0 +1,62 @@
+"use strict";
+
+const server = createHttpServer({
+  hosts: ["example.net", "example.org"],
+});
+server.registerDirectory("/data/", do_get_file("data"));
+
+add_task(async function test_process_switch_cross_origin_frame() {
+  const extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      content_scripts: [
+        {
+          matches: ["http://example.org/*/file_iframe.html"],
+          all_frames: true,
+          js: ["cs.js"],
+        },
+      ],
+    },
+
+    files: {
+      "cs.js"() {
+        browser.test.assertEq(
+          location.href,
+          "http://example.org/data/file_iframe.html",
+          "url is ok"
+        );
+
+        // frameId is the BrowsingContext ID in practice.
+        let frameId = browser.runtime.getFrameId(window);
+        browser.test.sendMessage("content-script-loaded", frameId);
+      },
+    },
+  });
+
+  await extension.startup();
+
+  const contentPage = await ExtensionTestUtils.loadContentPage(
+    "http://example.net/data/file_with_xorigin_frame.html"
+  );
+
+  const browserProcessId =
+    contentPage.browser.browsingContext.currentWindowGlobal.domProcess.childID;
+
+  const scriptFrameId = await extension.awaitMessage("content-script-loaded");
+
+  const children = contentPage.browser.browsingContext.children.map(bc => ({
+    browsingContextId: bc.id,
+    processId: bc.currentWindowGlobal.domProcess.childID,
+  }));
+
+  Assert.equal(children.length, 1);
+  Assert.equal(scriptFrameId, children[0].browsingContextId);
+
+  if (contentPage.remoteSubframes) {
+    Assert.notEqual(browserProcessId, children[0].processId);
+  } else {
+    Assert.equal(browserProcessId, children[0].processId);
+  }
+
+  await contentPage.close();
+  await extension.unload();
+});