9 files changed, 668 insertions, 0 deletions
diff --git a/browser/extensions/pdfjs/test/.eslintrc.js b/browser/extensions/pdfjs/test/.eslintrc.js
new file mode 100644
index 000000000..c764b133d
--- /dev/null
+++ b/browser/extensions/pdfjs/test/.eslintrc.js
@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = {
+  "extends": [
+    "../../../../testing/mochitest/browser.eslintrc.js"
+  ]
+};
diff --git a/browser/extensions/pdfjs/test/browser.ini b/browser/extensions/pdfjs/test/browser.ini
new file mode 100644
index 000000000..fb4aa9afc
--- /dev/null
+++ b/browser/extensions/pdfjs/test/browser.ini
@@ -0,0 +1,10 @@
+[DEFAULT]
+support-files =
+  file_pdfjs_test.pdf
+  head.js
+
+[browser_pdfjs_main.js]
+[browser_pdfjs_navigation.js]
+[browser_pdfjs_savedialog.js]
+[browser_pdfjs_views.js]
+[browser_pdfjs_zoom.js]
diff --git a/browser/extensions/pdfjs/test/browser_pdfjs_main.js b/browser/extensions/pdfjs/test/browser_pdfjs_main.js
new file mode 100644
index 000000000..9660e92c1
--- /dev/null
+++ b/browser/extensions/pdfjs/test/browser_pdfjs_main.js
@@ -0,0 +1,67 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const RELATIVE_DIR = "browser/extensions/pdfjs/test/";
+const TESTROOT = "http://example.com/browser/" + RELATIVE_DIR;
+
+add_task(function* test() {
+  let handlerService = Cc["@mozilla.org/uriloader/handler-service;1"].getService(Ci.nsIHandlerService);
+  let mimeService = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
+  let handlerInfo = mimeService.getFromTypeAndExtension('application/pdf', 'pdf');
+
+  // Make sure pdf.js is the default handler.
+  is(handlerInfo.alwaysAskBeforeHandling, false, 'pdf handler defaults to always-ask is false');
+  is(handlerInfo.preferredAction, Ci.nsIHandlerInfo.handleInternally, 'pdf handler defaults to internal');
+
+  info('Pref action: ' + handlerInfo.preferredAction);
+
+  yield BrowserTestUtils.withNewTab({ gBrowser: gBrowser, url: "about:blank" },
+    function* (newTabBrowser) {
+      yield waitForPdfJS(newTabBrowser, TESTROOT + "file_pdfjs_test.pdf");
+
+      ok(gBrowser.isFindBarInitialized(), "Browser FindBar initialized!");
+
+      yield ContentTask.spawn(newTabBrowser, null, function* () {
+        //
+        // Overall sanity tests
+        //
+        Assert.ok(content.document.querySelector('div#viewer'), "document content has viewer UI");
+        Assert.ok('PDFJS' in content.wrappedJSObject, "window content has PDFJS object");
+
+        //
+        // Sidebar: open
+        //
+        var sidebar = content.document.querySelector('button#sidebarToggle'),
+            outerContainer = content.document.querySelector('div#outerContainer');
+
+        sidebar.click();
+        Assert.ok(outerContainer.classList.contains('sidebarOpen'), "sidebar opens on click");
+
+        //
+        // Sidebar: close
+        //
+        sidebar.click();
+        Assert.ok(!outerContainer.classList.contains('sidebarOpen'), "sidebar closes on click");
+
+        //
+        // Page change from prev/next buttons
+        //
+        var prevPage = content.document.querySelector('button#previous'),
+            nextPage = content.document.querySelector('button#next');
+
+        var pgNumber = content.document.querySelector('input#pageNumber').value;
+        Assert.equal(parseInt(pgNumber, 10), 1, "initial page is 1");
+
+        //
+        // Bookmark button
+        //
+        var viewBookmark = content.document.querySelector('a#viewBookmark');
+        viewBookmark.click();
+
+        Assert.ok(viewBookmark.href.length > 0, "viewBookmark button has href");
+
+        var viewer = content.wrappedJSObject.PDFViewerApplication;
+        yield viewer.close();
+      });
+    });
+});
diff --git a/browser/extensions/pdfjs/test/browser_pdfjs_navigation.js b/browser/extensions/pdfjs/test/browser_pdfjs_navigation.js
new file mode 100644
index 000000000..b01a87ec8
--- /dev/null
+++ b/browser/extensions/pdfjs/test/browser_pdfjs_navigation.js
@@ -0,0 +1,283 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+requestLongerTimeout(2);
+
+Components.utils.import("resource://gre/modules/Promise.jsm", this);
+
+const RELATIVE_DIR = "browser/extensions/pdfjs/test/";
+const TESTROOT = "http://example.com/browser/" + RELATIVE_DIR;
+
+const PDF_OUTLINE_ITEMS = 17;
+const TESTS = [
+  {
+    action: {
+      selector: "button#next",
+      event: "click"
+    },
+    expectedPage: 2,
+    message: "navigated to next page using NEXT button"
+
+  },
+  {
+    action: {
+      selector: "button#previous",
+      event: "click"
+    },
+    expectedPage: 1,
+    message: "navigated to previous page using PREV button"
+  },
+  {
+    action: {
+      selector: "button#next",
+      event: "click"
+    },
+    expectedPage: 2,
+    message: "navigated to next page using NEXT button"
+  },
+  {
+    action: {
+      selector: "input#pageNumber",
+      value: 1,
+      event: "change"
+    },
+    expectedPage: 1,
+    message: "navigated to first page using pagenumber"
+  },
+  {
+    action: {
+      selector: "#thumbnailView a:nth-child(4)",
+      event: "click"
+    },
+    expectedPage: 4,
+    message: "navigated to 4th page using thumbnail view"
+  },
+  {
+    action: {
+      selector: "#thumbnailView a:nth-child(2)",
+      event: "click"
+    },
+    expectedPage: 2,
+    message: "navigated to 2nd page using thumbnail view"
+  },
+  {
+    action: {
+      selector: "#viewer",
+      event: "keydown",
+      keyCode: 36
+    },
+    expectedPage: 1,
+    message: "navigated to 1st page using 'home' key"
+  },
+  {
+    action: {
+      selector: "#viewer",
+      event: "keydown",
+      keyCode: 34
+    },
+    expectedPage: 2,
+    message: "navigated to 2nd page using 'Page Down' key"
+  },
+  {
+    action: {
+      selector: "#viewer",
+      event: "keydown",
+      keyCode: 33
+    },
+    expectedPage: 1,
+    message: "navigated to 1st page using 'Page Up' key"
+  },
+  {
+    action: {
+      selector: "#viewer",
+      event: "keydown",
+      keyCode: 39
+    },
+    expectedPage: 2,
+    message: "navigated to 2nd page using 'right' key"
+  },
+  {
+    action: {
+      selector: "#viewer",
+      event: "keydown",
+      keyCode: 37
+    },
+    expectedPage: 1,
+    message: "navigated to 1st page using 'left' key"
+  },
+  {
+    action: {
+      selector: "#viewer",
+      event: "keydown",
+      keyCode: 35
+    },
+    expectedPage: 5,
+    message: "navigated to last page using 'home' key"
+  },
+  {
+    action: {
+      selector: ".outlineItem:nth-child(1) a",
+      event: "click"
+    },
+    expectedPage: 1,
+    message: "navigated to 1st page using outline view"
+  },
+  {
+    action: {
+      selector: ".outlineItem:nth-child(" + PDF_OUTLINE_ITEMS + ") a",
+      event: "click"
+    },
+    expectedPage: 4,
+    message: "navigated to 4th page using outline view"
+  },
+  {
+    action: {
+      selector: "input#pageNumber",
+      value: 5,
+      event: "change"
+    },
+    expectedPage: 5,
+    message: "navigated to 5th page using pagenumber"
+  }
+];
+
+add_task(function* test() {
+  let mimeService = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
+  let handlerInfo = mimeService.getFromTypeAndExtension('application/pdf', 'pdf');
+
+  // Make sure pdf.js is the default handler.
+  is(handlerInfo.alwaysAskBeforeHandling, false, 'pdf handler defaults to always-ask is false');
+  is(handlerInfo.preferredAction, Ci.nsIHandlerInfo.handleInternally, 'pdf handler defaults to internal');
+
+  info('Pref action: ' + handlerInfo.preferredAction);
+
+  yield BrowserTestUtils.withNewTab({ gBrowser, url: "about:blank" },
+    function* (newTabBrowser) {
+      yield waitForPdfJS(newTabBrowser, TESTROOT + "file_pdfjs_test.pdf");
+
+      yield ContentTask.spawn(newTabBrowser, null, function* () {
+        // Check if PDF is opened with internal viewer
+        Assert.ok(content.document.querySelector("div#viewer"), "document content has viewer UI");
+        Assert.ok("PDFJS" in content.wrappedJSObject, "window content has PDFJS object");
+      });
+
+      yield ContentTask.spawn(newTabBrowser, null, contentSetUp);
+
+      yield Task.spawn(runTests(newTabBrowser));
+
+      yield ContentTask.spawn(newTabBrowser, null, function*() {
+        let pageNumber = content.document.querySelector('input#pageNumber');
+        Assert.equal(pageNumber.value, pageNumber.max, "Document is left on the last page");
+      });
+    });
+});
+
+function* contentSetUp() {
+  /**
+   * Outline Items gets appended to the document later on we have to
+   * wait for them before we start to navigate though document
+   *
+   * @param document
+   * @returns {deferred.promise|*}
+   */
+  function waitForOutlineItems(document) {
+    return new Promise((resolve, reject) => {
+      document.addEventListener("outlineloaded", function outlineLoaded(evt) {
+        document.removeEventListener("outlineloaded", outlineLoaded);
+        var outlineCount = evt.detail.outlineCount;
+
+        if (document.querySelectorAll(".outlineItem").length === outlineCount) {
+          resolve();
+        } else {
+          reject();
+        }
+      });
+    });
+  }
+
+  /**
+   * The key navigation has to happen in page-fit, otherwise it won't scroll
+   * through a complete page
+   *
+   * @param document
+   * @returns {deferred.promise|*}
+   */
+  function setZoomToPageFit(document) {
+    return new Promise((resolve) => {
+      document.addEventListener("pagerendered", function onZoom(e) {
+        document.removeEventListener("pagerendered", onZoom);
+        document.querySelector("#viewer").click();
+        resolve();
+      });
+
+      var select = document.querySelector("select#scaleSelect");
+      select.selectedIndex = 2;
+      select.dispatchEvent(new Event("change"));
+    });
+  }
+
+  yield waitForOutlineItems(content.document);
+  yield setZoomToPageFit(content.document);
+}
+
+/**
+ * As the page changes asynchronously, we have to wait for the event after
+ * we trigger the action so we will be at the expected page number after each action
+ *
+ * @param document
+ * @param window
+ * @param test
+ * @param callback
+ */
+function* runTests(browser) {
+  yield ContentTask.spawn(browser, TESTS, function* (TESTS) {
+    let window = content;
+    let document = window.document;
+
+    for (let test of TESTS) {
+      let deferred = {};
+      deferred.promise = new Promise((resolve, reject) => {
+        deferred.resolve = resolve;
+        deferred.reject = reject;
+      });
+
+      let pageNumber = document.querySelector('input#pageNumber');
+
+      // Add an event-listener to wait for page to change, afterwards resolve the promise
+      let timeout = window.setTimeout(() => deferred.reject(), 5000);
+      window.addEventListener('pagechange', function pageChange() {
+        if (pageNumber.value == test.expectedPage) {
+          window.removeEventListener('pagechange', pageChange);
+          window.clearTimeout(timeout);
+          deferred.resolve(+pageNumber.value);
+        }
+      });
+
+      // Get the element and trigger the action for changing the page
+      var el = document.querySelector(test.action.selector);
+      Assert.ok(el, "Element '" + test.action.selector + "' has been found");
+
+      // The value option is for input case
+      if (test.action.value)
+        el.value = test.action.value;
+
+      // Dispatch the event for changing the page
+      if (test.action.event == "keydown") {
+        var ev = document.createEvent("KeyboardEvent");
+            ev.initKeyEvent("keydown", true, true, null, false, false, false, false,
+                            test.action.keyCode, 0);
+        el.dispatchEvent(ev);
+      }
+      else {
+        var ev = new Event(test.action.event);
+      }
+      el.dispatchEvent(ev);
+
+      let pgNumber = yield deferred.promise;
+      Assert.equal(pgNumber, test.expectedPage, test.message);
+    }
+
+    var viewer = content.wrappedJSObject.PDFViewerApplication;
+    yield viewer.close();
+  });
+}
diff --git a/browser/extensions/pdfjs/test/browser_pdfjs_savedialog.js b/browser/extensions/pdfjs/test/browser_pdfjs_savedialog.js
new file mode 100644
index 000000000..a6564e591
--- /dev/null
+++ b/browser/extensions/pdfjs/test/browser_pdfjs_savedialog.js
@@ -0,0 +1,65 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const RELATIVE_DIR = "browser/extensions/pdfjs/test/";
+const TESTROOT = "http://example.com/browser/" + RELATIVE_DIR;
+
+function test() {
+  var oldAction = changeMimeHandler(Ci.nsIHandlerInfo.useSystemDefault, true);
+  var tab = gBrowser.addTab(TESTROOT + "file_pdfjs_test.pdf");
+  //
+  // Test: "Open with" dialog comes up when pdf.js is not selected as the default
+  // handler.
+  //
+  addWindowListener('chrome://mozapps/content/downloads/unknownContentType.xul', finish);
+
+  waitForExplicitFinish();
+  registerCleanupFunction(function() {
+    changeMimeHandler(oldAction[0], oldAction[1]);
+    gBrowser.removeTab(tab);
+  });
+}
+
+function changeMimeHandler(preferredAction, alwaysAskBeforeHandling) {
+  let handlerService = Cc["@mozilla.org/uriloader/handler-service;1"].getService(Ci.nsIHandlerService);
+  let mimeService = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
+  let handlerInfo = mimeService.getFromTypeAndExtension('application/pdf', 'pdf');
+  var oldAction = [handlerInfo.preferredAction, handlerInfo.alwaysAskBeforeHandling];
+
+  // Change and save mime handler settings
+  handlerInfo.alwaysAskBeforeHandling = alwaysAskBeforeHandling;
+  handlerInfo.preferredAction = preferredAction;
+  handlerService.store(handlerInfo);
+
+  Services.obs.notifyObservers(null, 'pdfjs:handlerChanged', null);
+
+  // Refresh data
+  handlerInfo = mimeService.getFromTypeAndExtension('application/pdf', 'pdf');
+
+  //
+  // Test: Mime handler was updated
+  //
+  is(handlerInfo.alwaysAskBeforeHandling, alwaysAskBeforeHandling, 'always-ask prompt change successful');
+  is(handlerInfo.preferredAction, preferredAction, 'mime handler change successful');
+
+  return oldAction;
+}
+
+function addWindowListener(aURL, aCallback) {
+  Services.wm.addListener({
+    onOpenWindow: function(aXULWindow) {
+      info("window opened, waiting for focus");
+      Services.wm.removeListener(this);
+
+      var domwindow = aXULWindow.QueryInterface(Ci.nsIInterfaceRequestor)
+                                .getInterface(Ci.nsIDOMWindow);
+      waitForFocus(function() {
+        is(domwindow.document.location.href, aURL, "should have seen the right window open");
+        domwindow.close();
+        aCallback();
+      }, domwindow);
+    },
+    onCloseWindow: function(aXULWindow) { },
+    onWindowTitleChange: function(aXULWindow, aNewTitle) { }
+  });
+}
diff --git a/browser/extensions/pdfjs/test/browser_pdfjs_views.js b/browser/extensions/pdfjs/test/browser_pdfjs_views.js
new file mode 100644
index 000000000..d14503e41
--- /dev/null
+++ b/browser/extensions/pdfjs/test/browser_pdfjs_views.js
@@ -0,0 +1,67 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const RELATIVE_DIR = "browser/extensions/pdfjs/test/";
+const TESTROOT = "http://example.com/browser/" + RELATIVE_DIR;
+
+add_task(function* test() {
+  let handlerService = Cc["@mozilla.org/uriloader/handler-service;1"].getService(Ci.nsIHandlerService);
+  let mimeService = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
+  let handlerInfo = mimeService.getFromTypeAndExtension('application/pdf', 'pdf');
+
+  // Make sure pdf.js is the default handler.
+  is(handlerInfo.alwaysAskBeforeHandling, false, 'pdf handler defaults to always-ask is false');
+  is(handlerInfo.preferredAction, Ci.nsIHandlerInfo.handleInternally, 'pdf handler defaults to internal');
+
+  info('Pref action: ' + handlerInfo.preferredAction);
+
+  yield BrowserTestUtils.withNewTab({ gBrowser, url: "about:blank" },
+    function* (browser) {
+      // check that PDF is opened with internal viewer
+      yield waitForPdfJS(browser, TESTROOT + "file_pdfjs_test.pdf");
+
+      yield ContentTask.spawn(browser, null, function* () {
+        Assert.ok(content.document.querySelector("div#viewer"), "document content has viewer UI");
+        Assert.ok("PDFJS" in content.wrappedJSObject, "window content has PDFJS object");
+
+        //open sidebar
+        var sidebar = content.document.querySelector('button#sidebarToggle');
+        var outerContainer = content.document.querySelector('div#outerContainer');
+
+        sidebar.click();
+        Assert.ok(outerContainer.classList.contains("sidebarOpen"), "sidebar opens on click");
+
+        // check that thumbnail view is open
+        var thumbnailView = content.document.querySelector('div#thumbnailView');
+        var outlineView = content.document.querySelector('div#outlineView');
+
+        Assert.equal(thumbnailView.getAttribute("class"), null,
+          "Initial view is thumbnail view");
+        Assert.equal(outlineView.getAttribute("class"), "hidden",
+          "Outline view is hidden initially");
+
+        //switch to outline view
+        var viewOutlineButton = content.document.querySelector('button#viewOutline');
+        viewOutlineButton.click();
+
+        Assert.equal(thumbnailView.getAttribute("class"), "hidden",
+          "Thumbnail view is hidden when outline is selected");
+        Assert.equal(outlineView.getAttribute("class"), "",
+          "Outline view is visible when selected");
+
+        //switch back to thumbnail view
+        var viewThumbnailButton = content.document.querySelector('button#viewThumbnail');
+        viewThumbnailButton.click();
+
+        Assert.equal(thumbnailView.getAttribute("class"), "",
+          "Thumbnail view is visible when selected");
+        Assert.equal(outlineView.getAttribute("class"), "hidden",
+          "Outline view is hidden when thumbnail is selected");
+
+        sidebar.click();
+
+        var viewer = content.wrappedJSObject.PDFViewerApplication;
+        yield viewer.close();
+      });
+    });
+});
diff --git a/browser/extensions/pdfjs/test/browser_pdfjs_zoom.js b/browser/extensions/pdfjs/test/browser_pdfjs_zoom.js
new file mode 100644
index 000000000..f2b73fd99
--- /dev/null
+++ b/browser/extensions/pdfjs/test/browser_pdfjs_zoom.js
@@ -0,0 +1,154 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+requestLongerTimeout(2);
+
+Components.utils.import("resource://gre/modules/Promise.jsm", this);
+
+const RELATIVE_DIR = "browser/extensions/pdfjs/test/";
+const TESTROOT = "http://example.com/browser/" + RELATIVE_DIR;
+
+const TESTS = [
+  {
+    action: {
+      selector: "button#zoomIn",
+      event: "click"
+    },
+    expectedZoom: 1, // 1 - zoom in
+    message: "Zoomed in using the '+' (zoom in) button"
+  },
+
+  {
+    action: {
+      selector: "button#zoomOut",
+      event: "click"
+    },
+    expectedZoom: -1, // -1 - zoom out
+    message: "Zoomed out using the '-' (zoom out) button"
+  },
+
+  {
+    action: {
+      keyboard: true,
+      keyCode: 61,
+      event: "+"
+    },
+    expectedZoom: 1, // 1 - zoom in
+    message: "Zoomed in using the CTRL++ keys"
+  },
+
+  {
+    action: {
+      keyboard: true,
+      keyCode: 109,
+      event: "-"
+    },
+    expectedZoom: -1, // -1 - zoom out
+    message: "Zoomed out using the CTRL+- keys"
+  },
+
+  {
+    action: {
+      selector: "select#scaleSelect",
+      index: 5,
+      event: "change"
+    },
+    expectedZoom: -1, // -1 - zoom out
+    message: "Zoomed using the zoom picker"
+  }
+];
+
+add_task(function* test() {
+  let handlerService = Cc["@mozilla.org/uriloader/handler-service;1"]
+                       .getService(Ci.nsIHandlerService);
+  let mimeService = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
+  let handlerInfo = mimeService.getFromTypeAndExtension('application/pdf', 'pdf');
+
+  // Make sure pdf.js is the default handler.
+  is(handlerInfo.alwaysAskBeforeHandling, false,
+     'pdf handler defaults to always-ask is false');
+  is(handlerInfo.preferredAction, Ci.nsIHandlerInfo.handleInternally,
+    'pdf handler defaults to internal');
+
+  info('Pref action: ' + handlerInfo.preferredAction);
+
+  yield BrowserTestUtils.withNewTab({ gBrowser, url: "about:blank" },
+    function* (newTabBrowser) {
+      yield waitForPdfJS(newTabBrowser, TESTROOT + "file_pdfjs_test.pdf" + "#zoom=100");
+
+      yield ContentTask.spawn(newTabBrowser, TESTS, function* (TESTS) {
+        let document = content.document;
+
+        function waitForRender() {
+          return new Promise((resolve) => {
+            document.addEventListener("pagerendered", function onPageRendered(e) {
+              if(e.detail.pageNumber !== 1) {
+                return;
+              }
+
+              document.removeEventListener("pagerendered", onPageRendered, true);
+              resolve();
+            }, true);
+          });
+        }
+
+        // check that PDF is opened with internal viewer
+        Assert.ok(content.document.querySelector("div#viewer"), "document content has viewer UI");
+        Assert.ok("PDFJS" in content.wrappedJSObject, "window content has PDFJS object");
+
+        let initialWidth, previousWidth;
+        initialWidth = previousWidth =
+          parseInt(content.document.querySelector("div#pageContainer1").style.width);
+
+        for (let test of TESTS) {
+          // We zoom using an UI element
+          var ev;
+          if (test.action.selector) {
+            // Get the element and trigger the action for changing the zoom
+            var el = document.querySelector(test.action.selector);
+            Assert.ok(el, "Element '" + test.action.selector + "' has been found");
+
+            if (test.action.index){
+              el.selectedIndex = test.action.index;
+            }
+
+            // Dispatch the event for changing the zoom
+            ev = new Event(test.action.event);
+          }
+          // We zoom using keyboard
+          else {
+            // Simulate key press
+            ev = new content.KeyboardEvent("keydown",
+                                           { key: test.action.event,
+                                             keyCode: test.action.keyCode,
+                                             ctrlKey: true });
+            el = content;
+          }
+
+          el.dispatchEvent(ev);
+          yield waitForRender();
+
+          var pageZoomScale = content.document.querySelector('select#scaleSelect');
+
+          // The zoom value displayed in the zoom select
+          var zoomValue = pageZoomScale.options[pageZoomScale.selectedIndex].innerHTML;
+
+          let pageContainer = content.document.querySelector('div#pageContainer1');
+          let actualWidth = parseInt(pageContainer.style.width);
+
+          // the actual zoom of the PDF document
+          let computedZoomValue = parseInt(((actualWidth/initialWidth).toFixed(2))*100) + "%";
+          Assert.equal(computedZoomValue, zoomValue, "Content has correct zoom");
+
+          // Check that document zooms in the expected way (in/out)
+          let zoom = (actualWidth - previousWidth) * test.expectedZoom;
+          Assert.ok(zoom > 0, test.message);
+
+          previousWidth = actualWidth;
+        }
+
+        var viewer = content.wrappedJSObject.PDFViewerApplication;
+        yield viewer.close();
+      });
+    });
+});
diff --git a/browser/extensions/pdfjs/test/file_pdfjs_test.pdf b/browser/extensions/pdfjs/test/file_pdfjs_test.pdf
new file mode 100644
index 000000000..7ad87e3c2
--- /dev/null
+++ b/browser/extensions/pdfjs/test/file_pdfjs_test.pdf
diff --git a/browser/extensions/pdfjs/test/head.js b/browser/extensions/pdfjs/test/head.js
new file mode 100644
index 000000000..d980bceb1
--- /dev/null
+++ b/browser/extensions/pdfjs/test/head.js
@@ -0,0 +1,15 @@
+function waitForPdfJS(browser, url) {
+  // Runs tests after all 'load' event handlers have fired off
+  return ContentTask.spawn(browser, url, function* (url) {
+    yield new Promise((resolve) => {
+      // NB: Add the listener to the global object so that we receive the
+      // event fired from the new window.
+      addEventListener("documentload", function listener() {
+        removeEventListener("documentload", listener, false);
+        resolve();
+      }, false, true);
+
+      content.location = url;
+    });
+  });
+}