1 files changed, 56 insertions, 0 deletions
diff --git a/dom/ipc/tests/browser_pbrowser_creation_failure.js b/dom/ipc/tests/browser_pbrowser_creation_failure.js
new file mode 100644
index 0000000000..fd4a45d523
--- /dev/null
+++ b/dom/ipc/tests/browser_pbrowser_creation_failure.js
@@ -0,0 +1,56 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function test_subframe_pbrowser_creation_failure() {
+  await BrowserTestUtils.withNewTab(
+    "https://example.com/document-builder.sjs?html=<iframe></iframe>",
+    async browser => {
+      let bcid = await SpecialPowers.spawn(browser, [], () => {
+        return content.document.body.querySelector("iframe").browsingContext.id;
+      });
+
+      // We currently have no known way to trigger PBrowser creation failure,
+      // other than to use this custom pref for the purpose.
+      info(`enabling failPBrowserCreation for browsingContext: ${bcid}`);
+      await SpecialPowers.pushPrefEnv({
+        set: [
+          ["browser.tabs.remote.testOnly.failPBrowserCreation.enabled", true],
+          [
+            "browser.tabs.remote.testOnly.failPBrowserCreation.browsingContext",
+            `${bcid}`,
+          ],
+        ],
+      });
+
+      let eventFiredPromise = BrowserTestUtils.waitForEvent(
+        browser,
+        "oop-browser-crashed"
+      );
+
+      info("triggering navigation which will fail pbrowser creation");
+      await SpecialPowers.spawn(browser, [], () => {
+        content.document.body.querySelector("iframe").src =
+          "https://example.org/document-builder.sjs?html=frame";
+      });
+
+      info("Waiting for oop-browser-crashed event.");
+      let event = await eventFiredPromise;
+      ok(!event.isTopFrame, "should be reporting subframe crash");
+      ok(
+        event.childID == 0,
+        "childID should be zero, as no process actually crashed"
+      );
+      is(event.browsingContextId, bcid, "bcid should match");
+
+      let { subject: windowGlobal } = await BrowserUtils.promiseObserved(
+        "window-global-created",
+        wgp => wgp.documentURI.spec.startsWith("about:framecrashed")
+      );
+      is(windowGlobal.browsingContext.id, bcid, "bcid is correct");
+
+      await SpecialPowers.popPrefEnv();
+    }
+  );
+});