Bug 1559244 - Step 3: Add test for crashing an oop iframe. r=mconley

Differential Revision: https://phabricator.services.mozilla.com/D38896

--HG--
extra : moz-landing-system : lando

dom/ipc/tests/browser.ini

@@ -4,6 +4,8 @@ support-files =
   file_domainPolicy_base.html
   file_cancel_content_js.html
 
+[browser_crash_oopiframe.js]
+skip-if = true # Disabled until bug 1566196 is fixed
 [browser_domainPolicy.js]
 skip-if = fission
 [browser_memory_distribution_telemetry.js]

dom/ipc/tests/browser_crash_oopiframe.js

@@ -0,0 +1,90 @@
+"use strict";
+
+/**
+ * In this test, we crash an out-of-process iframe and
+ * verify that :
+ *  1. the "oop-browser-crashed" event is dispatched with
+ *     the browsing context of the crashed oop subframe.
+ *  2. the crashed subframe is now pointing at "about:framecrashed"
+ *     page.
+ */
+add_task(async function() {
+  // Open a new window with fission enabled.
+  let win = await BrowserTestUtils.openNewBrowserWindow({
+    remote: true,
+    fission: true,
+  });
+
+  // Wait for the provided URL to load in our browser.
+  let url = "about:blank";
+  let browser = win.gBrowser.selectedBrowser;
+  BrowserTestUtils.loadURI(browser, url);
+  await BrowserTestUtils.browserLoaded(browser, false, url);
+
+  let rootBC = browser.browsingContext;
+
+  // Create an oop iframe.
+  let iframeID = await SpecialPowers.spawn(browser, [], async () => {
+    let iframe = content.document.createElement("iframe");
+    iframe.setAttribute("fission", "true");
+    iframe.setAttribute("src", "http://example.com");
+
+    const { ContentTaskUtils } = ChromeUtils.import(
+      "resource://testing-common/ContentTaskUtils.jsm"
+    );
+
+    content.document.body.appendChild(iframe);
+    await ContentTaskUtils.waitForEvent(iframe, "load");
+
+    let iframeBC = iframe.frameLoader.browsingContext;
+    return iframeBC.id;
+  });
+
+  let iframeBC = BrowsingContext.get(iframeID);
+  is(iframeBC.parent, rootBC, "oop frame has root as parent");
+
+  BrowserTestUtils.crashFrame(
+    browser,
+    true /* shouldShowTabCrashPage */,
+    true /* shouldClearMinidumps */,
+    iframeBC
+  );
+
+  let eventFiredPromise = BrowserTestUtils.waitForEvent(
+    browser,
+    "oop-browser-crashed"
+  );
+
+  await eventFiredPromise.then(event => {
+    isnot(
+      event.browsingContextId,
+      rootBC,
+      "top frame browsing context id not expected."
+    );
+
+    is(
+      event.browsingContextId,
+      iframeBC.id,
+      "oop frame browsing context id expected."
+    );
+  });
+
+  info("Wait for a new browsing context to get attached to our oop iframe.");
+  await BrowserTestUtils.waitForCondition(
+    () => rootBC.getChildren()[0] != iframeBC
+  );
+
+  let newIframeBC = rootBC.getChildren()[0];
+  let newIframeURI = await SpecialPowers.spawn(
+    newIframeBC,
+    [],
+    () => content.document.documentURI
+  );
+
+  ok(
+    newIframeURI.startsWith("about:framecrashed"),
+    "The iframe is now pointing at about:framecrashed"
+  );
+
+  await BrowserTestUtils.closeWindow(win);
+});