Add tests for webRequest events and frame unload

chrome/test/data/extensions/api_test/webrequest/test_unload6.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+const hostname1 = 'hostname-of-main-frame';
+const hostname2 = 'origin-different-from-main-frame';
+const hostname3 = 'origin-different-from-other-frames';
+
+// Wait until |num| webRequest.onErrorOccurred sub_frame events have triggered
+// and invoke |callback| with the results. We use this instead of the usual
+// test framework because a frame may or may not have onBeforeRequest events,
+// and at this point we are only interested in seeing whether the details in the
+// onErrorOccurred event are valid.
+function awaitOnErrorOccurred(num, callback) {
+  var callbackDone = chrome.test.callbackAdded();
+  var results = [];
+  chrome.webRequest.onErrorOccurred.addListener(function listener(details) {
+    delete details.requestId;
+    delete details.timeStamp;
+    details.frameId = normalizeFrameId(details.frameId);
+    details.parentFrameId = normalizeFrameId(details.parentFrameId);
+    results.push(details);
+
+    if (results.length === num) {
+      chrome.webRequest.onErrorOccurred.removeListener(listener);
+      callback(results);
+      callbackDone();
+    }
+  }, {
+    urls: ['<all_urls>'],
+    types: ['sub_frame'],
+  });
+}
+
+// Generate a deterministic frameId for a given frameId.
+function normalizeFrameId(frameId) {
+  chrome.test.assertTrue(typeof frameId == 'number');
+  if (frameId === -1 || frameId === 0)
+    return frameId; // unknown or main frame.
+  if (!(frameId in normalizeFrameId.cached))
+    normalizeFrameId.cached[frameId] =
+      Object.keys(normalizeFrameId.cached).length + 1;
+  return normalizeFrameId.cached[frameId];
+}
+normalizeFrameId.cached = {};
+
+runTests([
+  // Insert a frame from the same origin as the main frame, insert another frame
+  // from a different origin and immediately remove both.
+  function insertMultipleOriginFramesAndImmediatelyRemoveFrames() {
+    const mainUrl = getServerURL('empty.html', hostname1);
+    const frameUrl1 = getSlowURL(hostname1);
+    const frameUrl2 = getSlowURL(hostname2);
+
+    awaitOnErrorOccurred(2, function(results) {
+      // The order of the URLs doesn't matter.
+      var expectedUrls = [frameUrl1, frameUrl2].sort();
+      var actualUrls = results.map(r => r.url).sort();
+      chrome.test.assertEq(expectedUrls, actualUrls);
+      delete results[0].url;
+      delete results[1].url;
+
+      // The main purpose of this check is to see whether the frameId/tabId
+      // makes sense.
+      chrome.test.assertEq([{
+        method: 'GET',
+        frameId: 1,
+        parentFrameId: 0,
+        tabId,
+        type: 'sub_frame',
+        fromCache: false,
+        error: 'net::ERR_ABORTED',
+      }, {
+        method: 'GET',
+        frameId: 2,
+        parentFrameId: 0,
+        tabId,
+        type: 'sub_frame',
+        fromCache: false,
+        error: 'net::ERR_ABORTED',
+      }], results);
+    });
+
+    navigateAndWait(mainUrl, function() {
+      chrome.tabs.executeScript(tabId, {
+        code: `
+          var f1 = document.createElement('iframe');
+          f1.src = '${frameUrl1}';
+          var f2 = document.createElement('iframe');
+          f2.src = '${frameUrl2}';
+
+          document.body.appendChild(f1);
+          document.body.appendChild(f2);
+
+          f1.remove();
+          f2.remove();
+        `
+      });
+    });
+  },
+
+  // Insert a frame from yet another origin and immediately remove it.
+  // This test re-uses the tab from the previous test.
+  function insertCrossOriginFrameAndImmediatelyRemoveFrame() {
+    const frameUrl = getSlowURL(hostname3);
+
+    awaitOnErrorOccurred(1, function(results) {
+      chrome.test.assertEq([{
+        method: 'GET',
+        url: frameUrl,
+        frameId: 3,
+        parentFrameId: 0,
+        tabId,
+        type: 'sub_frame',
+        fromCache: false,
+        error: 'net::ERR_ABORTED',
+      }], results);
+    });
+
+    chrome.tabs.executeScript(tabId, {
+      code: `
+        var f = document.createElement('iframe');
+        f.src = '${frameUrl}';
+        document.body.appendChild(f);
+        f.remove();
+      `
+    });
+  },
+]);