Add ways to disable "beforeunload"

README.md

@@ -504,6 +504,7 @@ The code above will leave your browser window open in case there's a failure. (i
 --devtools  # (Open Chrome's DevTools when the browser opens.)
 --reuse-session | --rs  # (Reuse the browser session between tests.)
 --crumbs  # (Delete all cookies between tests reusing a session.)
+--disable-beforeunload  # (Disable the "beforeunload" event on Chrome.)
 --window-size=WIDTH,HEIGHT  # (Set the browser's starting window size.)
 --maximize  # (Start tests with the browser window maximized.)
 --screenshot  # (Save a screenshot at the end of each test.)

examples/raw_parameter_script.py

@@ -72,6 +72,7 @@ if pure_python:
     sb.visual_baseline = False
     sb.window_size = None
     sb.maximize_option = False
+    sb._disable_beforeunload = False
     sb.save_screenshot_after_test = False
     sb.timeout_multiplier = None
     sb.pytest_html_report = None

help_docs/customizing_test_runs.md

@@ -170,6 +170,7 @@ pytest my_first_test.py --settings-file=custom_settings.py
 --devtools  # (Open Chrome's DevTools when the browser opens.)
 --reuse-session | --rs  # (Reuse the browser session between tests.)
 --crumbs  # (Delete all cookies between tests reusing a session.)
+--disable-beforeunload  # (Disable the "beforeunload" event on Chrome.)
 --window-size=WIDTH,HEIGHT  # (Set the browser's starting window size.)
 --maximize  # (Start tests with the browser window maximized.)
 --screenshot  # (Save a screenshot at the end of each test.)

help_docs/method_summary.md

@@ -375,6 +375,8 @@ self.ad_block()
 
 self.show_file_choosers()
 
+self.disable_beforeunload()
+
 self.get_domain_url(url)
 
 self.get_beautiful_soup(source=None)

seleniumbase/behave/behave_sb.py

@@ -79,7 +79,8 @@ behave -D agent="User Agent String" -D demo
 -D devtools  (Open Chrome's DevTools when the browser opens.)
 -D reuse-session | -D rs  (Reuse browser session between tests.)
 -D crumbs  (Delete all cookies between tests reusing a session.)
--D window-size  (Set the browser window size: "Width,Height".)
+-D disable-beforeunload  (Disable the "beforeunload" event on Chrome.)
+-D window-size=WIDTH,HEIGHT  (Set the browser's starting window size.)
 -D maximize  (Start tests with the browser window maximized.)
 -D screenshot  (Save a screenshot at the end of each test.)
 -D visual-baseline  (Set the visual baseline for Visual/Layout tests.)
@@ -165,6 +166,7 @@ def get_configured_sb(context):
     sb._multithreaded = False
     sb._reuse_session = False
     sb._crumbs = False
+    sb._disable_beforeunload = False
     sb.visual_baseline = False
     sb.window_size = None
     sb.maximize_option = False
@@ -475,6 +477,10 @@ def get_configured_sb(context):
         if low_key == "crumbs":
             sb._crumbs = True
             continue
+        # Handle: -D disable-beforeunload / disable_beforeunload
+        if low_key in ["disable-beforeunload", "disable_beforeunload"]:
+            sb._disable_beforeunload = True
+            continue
         # Handle: -D visual-baseline / visual_baseline
         if low_key in ["visual-baseline", "visual_baseline"]:
             sb.visual_baseline = True

seleniumbase/fixtures/base_case.py

@@ -445,6 +445,7 @@ class BaseCase(unittest.TestCase):
             try:
                 if self.driver.current_url != pre_action_url:
                     self.__ad_block_as_needed()
+                    self.__disable_beforeunload_as_needed()
             except Exception:
                 try:
                     self.wait_for_ready_state_complete()
@@ -544,6 +545,7 @@ class BaseCase(unittest.TestCase):
             self.wait_for_angularjs(timeout=settings.MINI_TIMEOUT)
             if self.driver.current_url != pre_action_url:
                 self.__ad_block_as_needed()
+                self.__disable_beforeunload_as_needed()
         if self.demo_mode:
             if self.driver.current_url != pre_action_url:
                 self.__demo_mode_pause_if_active()
@@ -1915,6 +1917,7 @@ class BaseCase(unittest.TestCase):
             self.wait_for_angularjs(timeout=settings.MINI_TIMEOUT)
             if self.driver.current_url != pre_action_url:
                 self.__ad_block_as_needed()
+                self.__disable_beforeunload_as_needed()
         if self.demo_mode:
             if self.driver.current_url != pre_action_url:
                 self.__demo_mode_pause_if_active()
@@ -2505,6 +2508,9 @@ class BaseCase(unittest.TestCase):
         else:
             # A smaller subset of self.wait_for_ready_state_complete()
             self.wait_for_angularjs(timeout=settings.MINI_TIMEOUT)
+            if self.driver.current_url != pre_action_url:
+                self.__ad_block_as_needed()
+                self.__disable_beforeunload_as_needed()
         if self.demo_mode:
             if self.driver.current_url != pre_action_url:
                 self.__demo_mode_pause_if_active()
@@ -3646,6 +3652,7 @@ class BaseCase(unittest.TestCase):
         if self.js_checking_on:
             self.assert_no_js_errors()
         self.__ad_block_as_needed()
+        self.__disable_beforeunload_as_needed()
         return True
 
     def wait_for_angularjs(self, timeout=None, **kwargs):
@@ -5434,6 +5441,28 @@ class BaseCase(unittest.TestCase):
                         action = ["sh_fc", "", origin, time_stamp]
                         self.__extra_actions.append(action)
 
+    def disable_beforeunload(self):
+        """This prevents: "Leave Site? Changes you made may not be saved."
+                          on Chromium browsers (Chrome or Edge).
+        SB already sets "dom.disable_beforeunload" for Firefox options."""
+        self.__check_scope()
+        self.__check_browser()
+        if (
+            self.is_chromium()
+            and self.driver.current_url.startswith("http")
+        ):
+            try:
+                self.driver.execute_script("window.onbeforeunload=null;")
+            except Exception:
+                pass
+
+    def __disable_beforeunload_as_needed(self):
+        if (
+            hasattr(self, "_disable_beforeunload")
+            and self._disable_beforeunload
+        ):
+            self.disable_beforeunload()
+
     def get_domain_url(self, url):
         self.__check_scope()
         return page_utils.get_domain_url(url)
@@ -12454,6 +12483,7 @@ class BaseCase(unittest.TestCase):
             self._multithreaded = sb_config._multithreaded
             self._reuse_session = sb_config.reuse_session
             self._crumbs = sb_config.crumbs
+            self._disable_beforeunload = sb_config._disable_beforeunload
             self.dashboard = sb_config.dashboard
             self._dash_initialized = sb_config._dashboard_initialized
             if self.dashboard and self._multithreaded:

seleniumbase/plugins/pytest_plugin.py

@@ -92,6 +92,7 @@ def pytest_addoption(parser):
     --devtools  (Open Chrome's DevTools when the browser opens.)
     --reuse-session | --rs  (Reuse browser session between tests.)
     --crumbs  (Delete all cookies between tests reusing a session.)
+    --disable-beforeunload  (Disable the "beforeunload" event on Chrome.)
     --window-size=WIDTH,HEIGHT  (Set the browser's starting window size.)
     --maximize  (Start tests with the browser window maximized.)
     --screenshot  (Save a screenshot at the end of each test.)
@@ -952,6 +953,16 @@ def pytest_addoption(parser):
                 that reuse the same browser session. This option
                 is only needed when using "--reuse-session".""",
     )
+    parser.addoption(
+        "--disable-beforeunload",
+        "--disable_beforeunload",
+        action="store_true",
+        dest="_disable_beforeunload",
+        default=False,
+        help="""The option to disable the "beforeunload" event
+                on Chromium browsers (Chrome or Edge).
+                This is already the default Firefox option.""",
+    )
     parser.addoption(
         "--window-size",
         "--window_size",
@@ -1279,6 +1290,7 @@ def pytest_configure(config):
     sb_config.devtools = config.getoption("devtools")
     sb_config.reuse_session = config.getoption("reuse_session")
     sb_config.crumbs = config.getoption("crumbs")
+    sb_config._disable_beforeunload = config.getoption("_disable_beforeunload")
     sb_config.shared_driver = None  # The default driver for session reuse
     sb_config.window_size = config.getoption("window_size")
     sb_config.maximize_option = config.getoption("maximize_option")

seleniumbase/plugins/selenium_plugin.py

@@ -68,6 +68,7 @@ class SeleniumBrowser(Plugin):
     --incognito  (Enable Chrome's Incognito mode.)
     --guest  (Enable Chrome's Guest mode.)
     --devtools  (Open Chrome's DevTools when the browser opens.)
+    --disable-beforeunload  (Disable the "beforeunload" event on Chrome.)
     --window-size=WIDTH,HEIGHT  (Set the browser's starting window size.)
     --maximize  (Start tests with the browser window maximized.)
     --screenshot  (Save a screenshot at the end of each test.)
@@ -644,6 +645,16 @@ class SeleniumBrowser(Plugin):
             default=False,
             help="""Using this opens Chrome's DevTools.""",
         )
+        parser.add_option(
+            "--disable-beforeunload",
+            "--disable_beforeunload",
+            action="store_true",
+            dest="_disable_beforeunload",
+            default=False,
+            help="""The option to disable the "beforeunload" event
+                    on Chromium browsers (Chrome or Edge).
+                    This is already the default Firefox option.""",
+        )
         parser.add_option(
             "--window-size",
             "--window_size",
@@ -814,6 +825,7 @@ class SeleniumBrowser(Plugin):
         test.test.incognito = self.options.incognito
         test.test.guest_mode = self.options.guest_mode
         test.test.devtools = self.options.devtools
+        test.test._disable_beforeunload = self.options._disable_beforeunload
         test.test.window_size = self.options.window_size
         test.test.maximize_option = self.options.maximize_option
         test.test.save_screenshot_after_test = self.options.save_screenshot