Move WebExtensions enabled Add-ons Manager

1 files changed, 651 insertions, 0 deletions

diff --git a/toolkit/mozapps/webextensions/test/browser/browser_discovery.js b/toolkit/mozapps/webextensions/test/browser/browser_discovery.js
new file mode 100644
index 000000000..ec336df2d
--- /dev/null
+++ b/toolkit/mozapps/webextensions/test/browser/browser_discovery.js
@@ -0,0 +1,651 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Tests that the discovery view loads properly
+
+const MAIN_URL = "https://example.com/" + RELATIVE_DIR + "discovery.html";
+
+var gManagerWindow;
+var gCategoryUtilities;
+var gProvider;
+
+var gLoadCompleteCallback = null;
+
+var gProgressListener = {
+  onStateChange: function(aWebProgress, aRequest, aStateFlags, aStatus) {
+    // Only care about the network stop status events
+    if (!(aStateFlags & (Ci.nsIWebProgressListener.STATE_IS_NETWORK)) ||
+        !(aStateFlags & (Ci.nsIWebProgressListener.STATE_STOP)))
+      return;
+
+    if (gLoadCompleteCallback)
+      executeSoon(gLoadCompleteCallback);
+    gLoadCompleteCallback = null;
+  },
+
+  onLocationChange: function() { },
+  onSecurityChange: function() { },
+  onProgressChange: function() { },
+  onStatusChange: function() { },
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebProgressListener,
+                                         Ci.nsISupportsWeakReference]),
+};
+
+function test() {
+  // Switch to a known url
+  Services.prefs.setCharPref(PREF_DISCOVERURL, MAIN_URL);
+  // Temporarily enable caching
+  Services.prefs.setBoolPref(PREF_GETADDONS_CACHE_ENABLED, true);
+
+  waitForExplicitFinish();
+
+  gProvider = new MockProvider();
+
+  gProvider.createAddons([{
+    id: "addon1@tests.mozilla.org",
+    name: "Test add-on 1",
+    type: "extension",
+    version: "2.2",
+    isCompatible: false,
+    blocklistState: Ci.nsIBlocklistService.STATE_SOFTBLOCKED,
+    userDisabled: false
+  }, {
+    id: "addon2@tests.mozilla.org",
+    name: "Test add-on 2",
+    type: "plugin",
+    version: "3.1.5",
+    isCompatible: true,
+    blocklistState: Ci.nsIBlocklistService.STATE_NOT_BLOCKED,
+    userDisabled: false
+  }, {
+    id: "addon3@tests.mozilla.org",
+    name: "Test add-on 3",
+    type: "theme",
+    version: "1.2b1",
+    isCompatible: false,
+    blocklistState: Ci.nsIBlocklistService.STATE_BLOCKED,
+    userDisabled: true
+  }]);
+
+  run_next_test();
+}
+
+function end_test() {
+  finish();
+}
+
+function getURL(aBrowser) {
+  if (gManagerWindow.document.getElementById("discover-view").selectedPanel !=
+      aBrowser)
+    return null;
+
+  var url = aBrowser.currentURI.spec;
+  var pos = url.indexOf("#");
+  if (pos != -1)
+    return url.substring(0, pos);
+  return url;
+}
+
+function getHash(aBrowser) {
+  if (gManagerWindow.document.getElementById("discover-view").selectedPanel !=
+      aBrowser)
+    return null;
+
+  var url = aBrowser.currentURI.spec;
+  var pos = url.indexOf("#");
+  if (pos != -1)
+    return decodeURIComponent(url.substring(pos + 1));
+  return null;
+}
+
+function testHash(aBrowser, aTestAddonVisible, aCallback) {
+  var hash = getHash(aBrowser);
+  isnot(hash, null, "There should be a hash");
+  try {
+    var data = JSON.parse(hash);
+  }
+  catch (e) {
+    ok(false, "Hash should have been valid JSON: " + e);
+    aCallback();
+    return;
+  }
+  is(typeof data, "object", "Hash should be a JS object");
+
+  // Ensure that at least the test add-ons are present
+  if (aTestAddonVisible[0])
+    ok("addon1@tests.mozilla.org" in data, "Test add-on 1 should be listed");
+  else
+    ok(!("addon1@tests.mozilla.org" in data), "Test add-on 1 should not be listed");
+  if (aTestAddonVisible[1])
+    ok("addon2@tests.mozilla.org" in data, "Test add-on 2 should be listed");
+  else
+    ok(!("addon2@tests.mozilla.org" in data), "Test add-on 2 should not be listed");
+  if (aTestAddonVisible[2])
+    ok("addon3@tests.mozilla.org" in data, "Test add-on 3 should be listed");
+  else
+    ok(!("addon3@tests.mozilla.org" in data), "Test add-on 3 should not be listed");
+
+  // Test against all the add-ons the manager knows about since plugins and
+  // app extensions may exist
+  AddonManager.getAllAddons(function(aAddons) {
+    for (let addon of aAddons) {
+      if (!(addon.id in data)) {
+        // Test add-ons will have shown an error if necessary above
+        if (addon.id.substring(6) != "@tests.mozilla.org")
+          ok(false, "Add-on " + addon.id + " was not included in the data");
+        continue;
+      }
+
+      info("Testing data for add-on " + addon.id);
+      var addonData = data[addon.id];
+      is(addonData.name, addon.name, "Name should be correct");
+      is(addonData.version, addon.version, "Version should be correct");
+      is(addonData.type, addon.type, "Type should be correct");
+      is(addonData.userDisabled, addon.userDisabled, "userDisabled should be correct");
+      is(addonData.isBlocklisted, addon.blocklistState == Ci.nsIBlocklistService.STATE_BLOCKED, "blocklisted should be correct");
+      is(addonData.isCompatible, addon.isCompatible, "isCompatible should be correct");
+    }
+    aCallback();
+  });
+}
+
+function isLoading() {
+  var loading = gManagerWindow.document.getElementById("discover-view").selectedPanel ==
+                gManagerWindow.document.getElementById("discover-loading");
+  if (loading) {
+    is_element_visible(gManagerWindow.document.querySelector("#discover-loading .loading"),
+                       "Loading message should be visible when its panel is the selected panel");
+  }
+  return loading;
+}
+
+function isError() {
+  return gManagerWindow.document.getElementById("discover-view").selectedPanel ==
+         gManagerWindow.document.getElementById("discover-error");
+}
+
+function clickLink(aId, aCallback) {
+  var browser = gManagerWindow.document.getElementById("discover-browser");
+  browser.addProgressListener(gProgressListener);
+
+  gLoadCompleteCallback = function() {
+    browser.removeProgressListener(gProgressListener);
+    aCallback();
+  };
+
+  var link = browser.contentDocument.getElementById(aId);
+  EventUtils.sendMouseEvent({type: "click"}, link);
+
+  executeSoon(function() {
+    ok(isLoading(), "Clicking a link should show the loading pane");
+  });
+}
+
+// Tests that switching to the discovery view displays the right url
+add_test(function() {
+  open_manager("addons://list/extension", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    gCategoryUtilities.openType("discover", function() {
+      var browser = gManagerWindow.document.getElementById("discover-browser");
+      is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+      testHash(browser, [true, true, true], function() {
+        close_manager(gManagerWindow, run_next_test);
+      });
+    });
+
+    ok(isLoading(), "Should be loading at first");
+  });
+});
+
+// Tests that loading the add-ons manager with the discovery view as the last
+// selected view displays the right url
+add_test(function() {
+  // Hide one of the test add-ons
+  Services.prefs.setBoolPref("extensions.addon2@tests.mozilla.org.getAddons.cache.enabled", false);
+  Services.prefs.setBoolPref("extensions.addon3@tests.mozilla.org.getAddons.cache.enabled", true);
+
+  open_manager(null, function(aWindow) {
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+    is(gCategoryUtilities.selectedCategory, "discover", "Should have loaded the right view");
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+    testHash(browser, [true, false, true], function() {
+      close_manager(gManagerWindow, run_next_test);
+    });
+  }, function(aWindow) {
+    gManagerWindow = aWindow;
+    ok(isLoading(), "Should be loading at first");
+  });
+});
+
+// Tests that loading the add-ons manager with the discovery view as the initial
+// view displays the right url
+add_test(function() {
+  Services.prefs.clearUserPref("extensions.addon2@tests.mozilla.org.getAddons.cache.enabled");
+  Services.prefs.setBoolPref("extensions.addon3@tests.mozilla.org.getAddons.cache.enabled", false);
+
+  open_manager(null, function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+    gCategoryUtilities.openType("extension", function() {
+      close_manager(gManagerWindow, function() {
+        open_manager("addons://discover/", function(aWindow) {
+          gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+          is(gCategoryUtilities.selectedCategory, "discover", "Should have loaded the right view");
+
+          var browser = gManagerWindow.document.getElementById("discover-browser");
+          is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+          testHash(browser, [true, true, false], function() {
+            Services.prefs.clearUserPref("extensions.addon3@tests.mozilla.org.getAddons.cache.enabled");
+            close_manager(gManagerWindow, run_next_test);
+          });
+        }, function(aWindow) {
+          gManagerWindow = aWindow;
+          ok(isLoading(), "Should be loading at first");
+        });
+      });
+    });
+  });
+});
+
+// Tests that switching to the discovery view displays the right url
+add_test(function() {
+  Services.prefs.setBoolPref(PREF_GETADDONS_CACHE_ENABLED, false);
+
+  open_manager("addons://list/extension", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    gCategoryUtilities.openType("discover", function() {
+      var browser = gManagerWindow.document.getElementById("discover-browser");
+      is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+      is(getHash(browser), null, "Hash should not have been passed");
+      close_manager(gManagerWindow, run_next_test);
+    });
+  });
+});
+
+// Tests that loading the add-ons manager with the discovery view as the last
+// selected view displays the right url
+add_test(function() {
+  open_manager(null, function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+    is(gCategoryUtilities.selectedCategory, "discover", "Should have loaded the right view");
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+    is(getHash(browser), null, "Hash should not have been passed");
+    close_manager(gManagerWindow, run_next_test);
+  });
+});
+
+// Tests that loading the add-ons manager with the discovery view as the initial
+// view displays the right url
+add_test(function() {
+  open_manager(null, function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+    gCategoryUtilities.openType("extension", function() {
+      close_manager(gManagerWindow, function() {
+        open_manager("addons://discover/", function(aWindow) {
+          gManagerWindow = aWindow;
+          gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+          is(gCategoryUtilities.selectedCategory, "discover", "Should have loaded the right view");
+
+          var browser = gManagerWindow.document.getElementById("discover-browser");
+          is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+          is(getHash(browser), null, "Hash should not have been passed");
+          close_manager(gManagerWindow, run_next_test);
+        });
+      });
+    });
+  });
+});
+
+// Tests that navigating to an insecure page fails
+add_test(function() {
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+    clickLink("link-http", function() {
+      ok(isError(), "Should have shown the error page");
+
+      gCategoryUtilities.openType("extension", function() {
+        gCategoryUtilities.openType("discover", function() {
+          is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+          close_manager(gManagerWindow, run_next_test);
+        });
+        ok(isLoading(), "Should start loading again");
+      });
+    });
+  });
+});
+
+// Tests that navigating to a different domain fails
+add_test(function() {
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+    clickLink("link-domain", function() {
+      ok(isError(), "Should have shown the error page");
+
+      gCategoryUtilities.openType("extension", function() {
+        gCategoryUtilities.openType("discover", function() {
+          is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+          close_manager(gManagerWindow, run_next_test);
+        });
+        ok(isLoading(), "Should start loading again");
+      });
+    });
+  });
+});
+
+// Tests that navigating to a missing page fails
+add_test(function() {
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+    clickLink("link-bad", function() {
+      ok(isError(), "Should have shown the error page");
+
+      gCategoryUtilities.openType("extension", function() {
+        gCategoryUtilities.openType("discover", function() {
+          is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+          close_manager(gManagerWindow, run_next_test);
+        });
+        ok(isLoading(), "Should start loading again");
+      });
+    });
+  });
+});
+
+// Tests that navigating to a page on the same domain works
+add_test(function() {
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+    clickLink("link-good", function() {
+      is(getURL(browser), "https://example.com/" + RELATIVE_DIR + "releaseNotes.xhtml", "Should have loaded the right url");
+
+      gCategoryUtilities.openType("extension", function() {
+        gCategoryUtilities.openType("discover", function() {
+          is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+          close_manager(gManagerWindow, run_next_test);
+        });
+      });
+    });
+  });
+});
+
+// Tests repeated navigation to the same page followed by a navigation to a
+// different domain
+add_test(function() {
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+    var count = 10;
+    function clickAgain(aCallback) {
+      if (count-- == 0)
+        aCallback();
+      else
+        clickLink("link-normal", clickAgain.bind(null, aCallback));
+    }
+
+    clickAgain(function() {
+      is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+      clickLink("link-domain", function() {
+        ok(isError(), "Should have shown the error page");
+
+        gCategoryUtilities.openType("extension", function() {
+          gCategoryUtilities.openType("discover", function() {
+            is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+            close_manager(gManagerWindow, run_next_test);
+          });
+          ok(isLoading(), "Should start loading again");
+        });
+      });
+    });
+  });
+});
+
+// Loading an insecure main page should work if that is what the prefs say, should
+// also be able to navigate to a https page and back again
+add_test(function() {
+  Services.prefs.setCharPref(PREF_DISCOVERURL, TESTROOT + "discovery.html");
+
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), TESTROOT + "discovery.html", "Should have loaded the right url");
+
+    clickLink("link-normal", function() {
+      is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+      clickLink("link-http", function() {
+        is(getURL(browser), TESTROOT + "discovery.html", "Should have loaded the right url");
+
+        close_manager(gManagerWindow, run_next_test);
+      });
+    });
+  });
+});
+
+// Stopping the initial load should display the error page and then correctly
+// reload when switching away and back again
+add_test(function() {
+  Services.prefs.setCharPref(PREF_DISCOVERURL, MAIN_URL);
+
+  open_manager("addons://list/extension", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+
+    EventUtils.synthesizeMouse(gCategoryUtilities.get("discover"), 2, 2, { }, gManagerWindow);
+
+    wait_for_view_load(gManagerWindow, function() {
+      ok(isError(), "Should have shown the error page");
+
+      gCategoryUtilities.openType("extension", function() {
+        EventUtils.synthesizeMouse(gCategoryUtilities.get("discover"), 2, 2, { }, gManagerWindow);
+
+        wait_for_view_load(gManagerWindow, function() {
+          ok(isError(), "Should have shown the error page");
+
+          gCategoryUtilities.openType("extension", function() {
+            gCategoryUtilities.openType("discover", function() {
+              is(getURL(browser), MAIN_URL, "Should have loaded the right url");
+
+              close_manager(gManagerWindow, run_next_test);
+            });
+          });
+        });
+
+        ok(isLoading(), "Should be loading");
+        // This will stop the real page load
+        browser.stop();
+      });
+    });
+
+    ok(isLoading(), "Should be loading");
+    // This will actually stop the about:blank load
+    browser.stop();
+  });
+});
+
+// Test for Bug 703929 - Loading the discover view from a chrome XUL file fails when
+// the add-on manager is reopened.
+add_test(function() {
+  const url = "chrome://mochitests/content/" +  RELATIVE_DIR + "addon_about.xul";
+  Services.prefs.setCharPref(PREF_DISCOVERURL, url);
+
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), url, "Loading a chrome XUL file should work");
+
+    restart_manager(gManagerWindow, "addons://discover/", function(aWindow) {
+      gManagerWindow = aWindow;
+      gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+
+      var browser = gManagerWindow.document.getElementById("discover-browser");
+      is(getURL(browser), url, "Should be able to load the chrome XUL file a second time");
+
+      close_manager(gManagerWindow, run_next_test);
+    });
+  });
+});
+
+// Bug 711693 - Send the compatibility mode when loading the Discovery pane
+add_test(function() {
+  info("Test '%COMPATIBILITY_MODE%' in the URL is correctly replaced by 'normal'");
+  Services.prefs.setCharPref(PREF_DISCOVERURL,  MAIN_URL + "?mode=%COMPATIBILITY_MODE%");
+  Services.prefs.setBoolPref(PREF_STRICT_COMPAT, false);
+
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL + "?mode=normal", "Should have loaded the right url");
+    close_manager(gManagerWindow, run_next_test);
+  });
+});
+
+add_test(function() {
+  info("Test '%COMPATIBILITY_MODE%' in the URL is correctly replaced by 'strict'");
+  Services.prefs.setBoolPref(PREF_STRICT_COMPAT, true);
+
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL + "?mode=strict", "Should have loaded the right url");
+    close_manager(gManagerWindow, run_next_test);
+  });
+});
+
+add_test(function() {
+  info("Test '%COMPATIBILITY_MODE%' in the URL is correctly replaced by 'ignore'");
+  Services.prefs.setBoolPref(PREF_CHECK_COMPATIBILITY, false);
+
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+    var browser = gManagerWindow.document.getElementById("discover-browser");
+    is(getURL(browser), MAIN_URL + "?mode=ignore", "Should have loaded the right url");
+    close_manager(gManagerWindow, run_next_test);
+  });
+});
+
+// Test for Bug 601442 - extensions.getAddons.showPane need to be update
+// for the new addon manager.
+function bug_601442_test_elements(visible) {
+  open_manager("addons://list/extension", function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+    if (visible)
+      ok(gCategoryUtilities.isTypeVisible("discover"), "Discover category should be visible");
+    else
+      ok(!gCategoryUtilities.isTypeVisible("discover"), "Discover category should not be visible");
+
+    gManagerWindow.loadView("addons://list/dictionary");
+    wait_for_view_load(gManagerWindow, function(aManager) {
+      var button = aManager.document.getElementById("discover-button-install");
+      if (visible)
+        ok(!is_hidden(button), "Discover button should be visible!");
+      else
+        ok(is_hidden(button), "Discover button should not be visible!");
+
+      close_manager(gManagerWindow, run_next_test);
+    });
+  });
+}
+
+add_test(function() {
+  Services.prefs.setBoolPref(PREF_DISCOVER_ENABLED, false);
+  Services.prefs.setBoolPref(PREF_XPI_ENABLED, true);
+  bug_601442_test_elements(false);
+});
+add_test(function() {
+  Services.prefs.setBoolPref(PREF_DISCOVER_ENABLED, true);
+  Services.prefs.setBoolPref(PREF_XPI_ENABLED, false);
+  bug_601442_test_elements(false);
+});
+add_test(function() {
+  Services.prefs.setBoolPref(PREF_DISCOVER_ENABLED, false);
+  Services.prefs.setBoolPref(PREF_XPI_ENABLED, false);
+  bug_601442_test_elements(false);
+});
+add_test(function() {
+  Services.prefs.setBoolPref(PREF_DISCOVER_ENABLED, true);
+  Services.prefs.setBoolPref(PREF_XPI_ENABLED, true);
+  bug_601442_test_elements(true);
+});
+
+// Test for Bug 1132971 - if extensions.getAddons.showPane is false,
+// the extensions pane should show by default
+add_test(function() {
+  Services.prefs.clearUserPref(PREF_UI_LASTCATEGORY);
+  Services.prefs.setBoolPref(PREF_DISCOVER_ENABLED, false);
+
+  open_manager(null, function(aWindow) {
+    gManagerWindow = aWindow;
+    gCategoryUtilities = new CategoryUtilities(gManagerWindow);
+    is(gCategoryUtilities.selectedCategory, "extension", "Should be showing the extension view");
+    close_manager(gManagerWindow, run_next_test);
+    Services.prefs.clearUserPref(PREF_DISCOVER_ENABLED);
+  });
+});
+
+// Test for Bug 1219495 - should show placeholder content when offline
+add_test(function() {
+  // set a URL to cause an error
+  Services.prefs.setCharPref(PREF_DISCOVERURL, "https://nocert.example.com/");
+
+  open_manager("addons://discover/", function(aWindow) {
+    gManagerWindow = aWindow;
+
+    ok(isError(), "Should have shown the placeholder content");
+
+    close_manager(gManagerWindow, run_next_test);
+  });
+});