display an informative message in settings page if IndexedDB cannot be accessed

2 files changed, 58 insertions, 4 deletions

diff --git a/test/haketilo_test/unit/test_indexeddb.py b/test/haketilo_test/unit/test_indexeddb.py
index c2d5427..773f5c8 100644
--- a/test/haketilo_test/unit/test_indexeddb.py
+++ b/test/haketilo_test/unit/test_indexeddb.py
@@ -21,7 +21,6 @@ import pytest
 import json
 from selenium.webdriver.common.by import By
 from selenium.webdriver.support.ui import WebDriverWait
-from selenium.webdriver.support import expected_conditions as EC
 from selenium.common.exceptions import WebDriverException
 
 from ..script_loader import load_script
diff --git a/test/haketilo_test/unit/test_settings.py b/test/haketilo_test/unit/test_settings.py
index 7cdb76f..92ec4b6 100644
--- a/test/haketilo_test/unit/test_settings.py
+++ b/test/haketilo_test/unit/test_settings.py
@@ -20,18 +20,24 @@ Haketilo unit tests - entire settings page
 import pytest
 from .utils import *
 
+from selenium.webdriver.support.ui import WebDriverWait
+from selenium.webdriver.support import expected_conditions as EC
+from selenium.webdriver.common.by import By
+
 from ..extension_crafting import ExtraHTML
 from ..script_loader import load_script
 from .utils import *
 
-@pytest.mark.ext_data({
+ext_data = {
     'background_script': broker_js,
     'extra_html': ExtraHTML('html/settings.html', wrap_into_htmldoc=False)
-})
+}
+
+@pytest.mark.ext_data(ext_data)
 @pytest.mark.usefixtures('webextension')
 def test_settings_page_tabs(driver, execute_in_page):
     """
-    Test navigation throught the tabs of the settings page.
+    Test navigation through the tabs of the settings page.
     """
     # First, put some sample data in IndexedDB.
     execute_in_page(load_script('common/indexeddb.js'))
@@ -45,6 +51,13 @@ def test_settings_page_tabs(driver, execute_in_page):
     # Now navigate to settings page.
     testpage_url = driver.execute_script('return window.location.href;')
     driver.get(testpage_url.replace('testpage.html', 'html/settings.html'))
+    execute_in_page('init_settings_page();')
+
+    WebDriverWait(driver, 10)\
+        .until(EC.visibility_of_element_located((By.ID, "main_view")))
+
+    assert driver.find_elements_by_id('loader') == []
+    assert not driver.find_element_by_id('indexeddb_error').is_displayed()
 
     names = ['blocking', 'mappings', 'resources', 'new_payload', 'repos']
     tabs = dict([(n, driver.find_element_by_id(f'{n}_tab')) for n in names])
@@ -61,3 +74,45 @@ def test_settings_page_tabs(driver, execute_in_page):
             assert 'active_head' not in heads[tab_name_2].get_attribute('class')
             assert 'active_tab' not in tabs[tab_name_2].get_attribute('class')
             assert not tabs[tab_name_2].is_displayed()
+
+@pytest.mark.ext_data({
+    **ext_data,
+    'navigate_to': 'html/settings.html'
+})
+@pytest.mark.usefixtures('webextension')
+@pytest.mark.parametrize('incognito', [True, False])
+def test_settings_page_indexeddb_error(driver, execute_in_page, incognito):
+    """
+    Test if failure to access IndexedDB in settings page results in the
+    appropriate message being shown.
+    """
+    execute_in_page(
+        '''{
+        /*
+         * Mock an unavailable IndexedDB. Calling onerror() without having set
+         * "errorCode" on the request is the behavior observed under Mozilla.
+         */
+        indexedDB.open = function() {
+            const dummy_open_request = {};
+            const dummy_event = {target: dummy_open_request};
+            setTimeout(() => dummy_open_request.onerror(dummy_event), 0);
+
+            return dummy_open_request;
+        }
+
+        const dummy_tab = {incognito: arguments[0]};
+        browser.tabs.getCurrent = () => Promise.resolve(dummy_tab);
+
+        init_settings_page();
+        }''',
+        incognito)
+
+    WebDriverWait(driver, 10)\
+        .until(EC.visibility_of_element_located((By.ID, 'indexeddb_error')))
+
+    assert driver.find_elements_by_id('loader') == []
+    assert not driver.find_element_by_id('main_view').is_displayed()
+
+    if incognito:
+        assert driver.find_element_by_id('indexeddb_private_mode_explanation')\
+                     .is_displayed()