diff -r 000000000000 -r 6474c204b198 toolkit/components/thumbnails/test/head.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/thumbnails/test/head.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,396 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tmp = {};
+Cu.import("resource://gre/modules/PageThumbs.jsm", tmp);
+Cu.import("resource://gre/modules/BackgroundPageThumbs.jsm", tmp);
+Cu.import("resource://gre/modules/NewTabUtils.jsm", tmp);
+Cu.import("resource:///modules/sessionstore/SessionStore.jsm", tmp);
+Cu.import("resource://gre/modules/FileUtils.jsm", tmp);
+Cu.import("resource://gre/modules/osfile.jsm", tmp);
+let {PageThumbs, BackgroundPageThumbs, NewTabUtils, PageThumbsStorage, SessionStore, FileUtils, OS} = tmp;
+
+Cu.import("resource://gre/modules/PlacesUtils.jsm");
+
+let oldEnabledPref = Services.prefs.getBoolPref("browser.pagethumbnails.capturing_disabled");
+Services.prefs.setBoolPref("browser.pagethumbnails.capturing_disabled", false);
+
+registerCleanupFunction(function () {
+  while (gBrowser.tabs.length > 1)
+    gBrowser.removeTab(gBrowser.tabs[1]);
+  Services.prefs.setBoolPref("browser.pagethumbnails.capturing_disabled", oldEnabledPref)
+});
+
+/**
+ * Provide the default test function to start our test runner.
+ */
+function test() {
+  TestRunner.run();
+}
+
+/**
+ * The test runner that controls the execution flow of our tests.
+ */
+let TestRunner = {
+  /**
+   * Starts the test runner.
+   */
+  run: function () {
+    waitForExplicitFinish();
+
+    SessionStore.promiseInitialized.then(function () {
+      this._iter = runTests();
+      if (this._iter) {
+        this.next();
+      } else {
+        finish();
+      }
+    }.bind(this));
+  },
+
+  /**
+   * Runs the next available test or finishes if there's no test left.
+   * @param aValue This value will be passed to the yielder via the runner's
+   *               iterator.
+   */
+  next: function (aValue) {
+    try {
+      let value = TestRunner._iter.send(aValue);
+      if (value && typeof value.then == "function") {
+        value.then(result => {
+          next(result);
+        }, error => {
+          ok(false, error + "\n" + error.stack);
+        });
+      }
+    } catch (e if e instanceof StopIteration) {
+      finish();
+    }
+  }
+};
+
+/**
+ * Continues the current test execution.
+ * @param aValue This value will be passed to the yielder via the runner's
+ *               iterator.
+ */
+function next(aValue) {
+  TestRunner.next(aValue);
+}
+
+/**
+ * Creates a new tab with the given URI.
+ * @param aURI The URI that's loaded in the tab.
+ * @param aCallback The function to call when the tab has loaded.
+ */
+function addTab(aURI, aCallback) {
+  let tab = gBrowser.selectedTab = gBrowser.addTab(aURI);
+  whenLoaded(tab.linkedBrowser, aCallback);
+}
+
+/**
+ * Loads a new URI into the currently selected tab.
+ * @param aURI The URI to load.
+ */
+function navigateTo(aURI) {
+  let browser = gBrowser.selectedTab.linkedBrowser;
+  whenLoaded(browser);
+  browser.loadURI(aURI);
+}
+
+/**
+ * Continues the current test execution when a load event for the given element
+ * has been received.
+ * @param aElement The DOM element to listen on.
+ * @param aCallback The function to call when the load event was dispatched.
+ */
+function whenLoaded(aElement, aCallback = next) {
+  aElement.addEventListener("load", function onLoad() {
+    aElement.removeEventListener("load", onLoad, true);
+    executeSoon(aCallback);
+  }, true);
+}
+
+/**
+ * Captures a screenshot for the currently selected tab, stores it in the cache,
+ * retrieves it from the cache and compares pixel color values.
+ * @param aRed The red component's intensity.
+ * @param aGreen The green component's intensity.
+ * @param aBlue The blue component's intensity.
+ * @param aMessage The info message to print when comparing the pixel color.
+ */
+function captureAndCheckColor(aRed, aGreen, aBlue, aMessage) {
+  let browser = gBrowser.selectedBrowser;
+  // We'll get oranges if the expiration filter removes the file during the
+  // test.
+  dontExpireThumbnailURLs([browser.currentURI.spec]);
+
+  // Capture the screenshot.
+  PageThumbs.captureAndStore(browser, function () {
+    retrieveImageDataForURL(browser.currentURI.spec, function ([r, g, b]) {
+      is("" + [r,g,b], "" + [aRed, aGreen, aBlue], aMessage);
+      next();
+    });
+  });
+}
+
+/**
+ * For a given URL, loads the corresponding thumbnail
+ * to a canvas and passes its image data to the callback.
+ * @param aURL The url associated with the thumbnail.
+ * @param aCallback The function to pass the image data to.
+ */
+function retrieveImageDataForURL(aURL, aCallback) {
+  let width = 100, height = 100;
+  let thumb = PageThumbs.getThumbnailURL(aURL, width, height);
+  // create a tab with a chrome:// URL so it can host the thumbnail image.
+  // Note that we tried creating the element directly in the top-level chrome
+  // document, but this caused a strange problem:
+  // * call this with the url of an image.
+  // * immediately change the image content.
+  // * call this again with the same url (now holding different content)
+  // The original image data would be used.  Maybe the img hadn't been
+  // collected yet and the platform noticed the same URL, so reused the
+  // content?  Not sure - but this solves the problem.
+  addTab("chrome://global/content/mozilla.xhtml", () => {
+    let doc = gBrowser.selectedBrowser.contentDocument;
+    let htmlns = "http://www.w3.org/1999/xhtml";
+    let img = doc.createElementNS(htmlns, "img");
+    img.setAttribute("src", thumb);
+
+    whenLoaded(img, function () {
+      let canvas = document.createElementNS(htmlns, "canvas");
+      canvas.setAttribute("width", width);
+      canvas.setAttribute("height", height);
+
+      // Draw the image to a canvas and compare the pixel color values.
+      let ctx = canvas.getContext("2d");
+      ctx.drawImage(img, 0, 0, width, height);
+      let result = ctx.getImageData(0, 0, 100, 100).data;
+      gBrowser.removeTab(gBrowser.selectedTab);
+      aCallback(result);
+    });
+  });
+}
+
+/**
+ * Returns the file of the thumbnail with the given URL.
+ * @param aURL The URL of the thumbnail.
+ */
+function thumbnailFile(aURL) {
+  return new FileUtils.File(PageThumbsStorage.getFilePathForURL(aURL));
+}
+
+/**
+ * Checks if a thumbnail for the given URL exists.
+ * @param aURL The url associated to the thumbnail.
+ */
+function thumbnailExists(aURL) {
+  let file = thumbnailFile(aURL);
+  return file.exists() && file.fileSize;
+}
+
+/**
+ * Removes the thumbnail for the given URL.
+ * @param aURL The URL associated with the thumbnail.
+ */
+function removeThumbnail(aURL) {
+  let file = thumbnailFile(aURL);
+  file.remove(false);
+}
+
+/**
+ * Asynchronously adds visits to a page, invoking a callback function when done.
+ *
+ * @param aPlaceInfo
+ *        One of the following: a string spec, an nsIURI, an object describing
+ *        the Place as described below, or an array of any such types.  An
+ *        object describing a Place must look like this:
+ *          { uri: nsIURI of the page,
+ *            [optional] transition: one of the TRANSITION_* from
+ *                       nsINavHistoryService,
+ *            [optional] title: title of the page,
+ *            [optional] visitDate: visit date in microseconds from the epoch
+ *            [optional] referrer: nsIURI of the referrer for this visit
+ *          }
+ * @param [optional] aCallback
+ *        Function to be invoked on completion.
+ */
+function addVisits(aPlaceInfo, aCallback) {
+  let places = [];
+  if (aPlaceInfo instanceof Ci.nsIURI) {
+    places.push({ uri: aPlaceInfo });
+  }
+  else if (Array.isArray(aPlaceInfo)) {
+    places = places.concat(aPlaceInfo);
+  } else {
+    places.push(aPlaceInfo)
+  }
+
+  // Create mozIVisitInfo for each entry.
+  let now = Date.now();
+  for (let i = 0; i < places.length; i++) {
+    if (typeof(places[i] == "string")) {
+      places[i] = { uri: Services.io.newURI(places[i], "", null) };
+    }
+    if (!places[i].title) {
+      places[i].title = "test visit for " + places[i].uri.spec;
+    }
+    places[i].visits = [{
+      transitionType: places[i].transition === undefined ? PlacesUtils.history.TRANSITION_LINK
+                                                         : places[i].transition,
+      visitDate: places[i].visitDate || (now++) * 1000,
+      referrerURI: places[i].referrer
+    }];
+  }
+
+  PlacesUtils.asyncHistory.updatePlaces(
+    places,
+    {
+      handleError: function AAV_handleError() {
+        throw("Unexpected error in adding visit.");
+      },
+      handleResult: function () {},
+      handleCompletion: function UP_handleCompletion() {
+        if (aCallback)
+          aCallback();
+      }
+    }
+  );
+}
+
+/**
+ * Calls addVisits, and then forces the newtab module to repopulate its links.
+ * See addVisits for parameter descriptions.
+ */
+function addVisitsAndRepopulateNewTabLinks(aPlaceInfo, aCallback) {
+  addVisits(aPlaceInfo, () => NewTabUtils.links.populateCache(aCallback, true));
+}
+
+/**
+ * Calls a given callback when the thumbnail for a given URL has been found
+ * on disk. Keeps trying until the thumbnail has been created.
+ *
+ * @param aURL The URL of the thumbnail's page.
+ * @param [optional] aCallback
+ *        Function to be invoked on completion.
+ */
+function whenFileExists(aURL, aCallback = next) {
+  let callback = aCallback;
+  if (!thumbnailExists(aURL)) {
+    callback = function () whenFileExists(aURL, aCallback);
+  }
+
+  executeSoon(callback);
+}
+
+/**
+ * Calls a given callback when the given file has been removed.
+ * Keeps trying until the file is removed.
+ *
+ * @param aFile The file that is being removed
+ * @param [optional] aCallback
+ *        Function to be invoked on completion.
+ */
+function whenFileRemoved(aFile, aCallback) {
+  let callback = aCallback;
+  if (aFile.exists()) {
+    callback = function () whenFileRemoved(aFile, aCallback);
+  }
+
+  executeSoon(callback || next);
+}
+
+function wait(aMillis) {
+  setTimeout(next, aMillis);
+}
+
+/**
+ * Makes sure that a given list of URLs is not implicitly expired.
+ *
+ * @param aURLs The list of URLs that should not be expired.
+ */
+function dontExpireThumbnailURLs(aURLs) {
+  let dontExpireURLs = (cb) => cb(aURLs);
+  PageThumbs.addExpirationFilter(dontExpireURLs);
+
+  registerCleanupFunction(function () {
+    PageThumbs.removeExpirationFilter(dontExpireURLs);
+  });
+}
+
+function bgCapture(aURL, aOptions) {
+  bgCaptureWithMethod("capture", aURL, aOptions);
+}
+
+function bgCaptureIfMissing(aURL, aOptions) {
+  bgCaptureWithMethod("captureIfMissing", aURL, aOptions);
+}
+
+function bgCaptureWithMethod(aMethodName, aURL, aOptions = {}) {
+  // We'll get oranges if the expiration filter removes the file during the
+  // test.
+  dontExpireThumbnailURLs([aURL]);
+  if (!aOptions.onDone)
+    aOptions.onDone = next;
+  BackgroundPageThumbs[aMethodName](aURL, aOptions);
+}
+
+function bgTestPageURL(aOpts = {}) {
+  let TEST_PAGE_URL = "http://mochi.test:8888/browser/toolkit/components/thumbnails/test/thumbnails_background.sjs";
+  return TEST_PAGE_URL + "?" + encodeURIComponent(JSON.stringify(aOpts));
+}
+
+function bgAddCrashObserver() {
+  let crashed = false;
+  Services.obs.addObserver(function crashObserver(subject, topic, data) {
+    is(topic, 'ipc:content-shutdown', 'Received correct observer topic.');
+    ok(subject instanceof Components.interfaces.nsIPropertyBag2,
+       'Subject implements nsIPropertyBag2.');
+    // we might see this called as the process terminates due to previous tests.
+    // We are only looking for "abnormal" exits...
+    if (!subject.hasKey("abnormal")) {
+      info("This is a normal termination and isn't the one we are looking for...");
+      return;
+    }
+    Services.obs.removeObserver(crashObserver, 'ipc:content-shutdown');
+    crashed = true;
+
+    var dumpID;
+    if ('nsICrashReporter' in Components.interfaces) {
+      dumpID = subject.getPropertyAsAString('dumpID');
+      ok(dumpID, "dumpID is present and not an empty string");
+    }
+
+    if (dumpID) {
+      var minidumpDirectory = getMinidumpDirectory();
+      removeFile(minidumpDirectory, dumpID + '.dmp');
+      removeFile(minidumpDirectory, dumpID + '.extra');
+    }
+  }, 'ipc:content-shutdown', false);
+  return {
+    get crashed() crashed
+  };
+}
+
+function bgInjectCrashContentScript() {
+  const TEST_CONTENT_HELPER = "chrome://mochitests/content/browser/toolkit/components/thumbnails/test/thumbnails_crash_content_helper.js";
+  let thumbnailBrowser = BackgroundPageThumbs._thumbBrowser;
+  let mm = thumbnailBrowser.messageManager;
+  mm.loadFrameScript(TEST_CONTENT_HELPER, false);
+  return mm;
+}
+
+function getMinidumpDirectory() {
+  var dir = Services.dirsvc.get('ProfD', Components.interfaces.nsIFile);
+  dir.append("minidumps");
+  return dir;
+}
+
+function removeFile(directory, filename) {
+  var file = directory.clone();
+  file.append(filename);
+  if (file.exists()) {
+    file.remove(false);
+  }
+}