SerenityOS Browser support in WPT

a.patch

diff --git a/tools/wpt/browser.py b/tools/wpt/browser.py
index 66796a8968..6a581b0675 100644
--- a/tools/wpt/browser.py
+++ b/tools/wpt/browser.py
@@ -2046,3 +2046,27 @@ class Epiphany(Browser):
             # Tech Preview output looks like "Web 3.31.3-88-g97db4f40f"
             return output.split()[1]
         return None
+
+class SerenityOSBrowser(Browser):
+    """SerenityOS Browser-specific interface."""
+
+    product = "serenityos_browser"
+    requirements = None
+
+    def download(self, dest=None, channel=None, rename=None):
+        raise NotImplementedError
+
+    def install(self, dest=None, channel=None):
+        raise NotImplementedError
+
+    def find_binary(self, venv_path=None, channel=None):
+        raise NotImplementedError
+
+    def find_webdriver(self, venv_path=None, channel=None):
+        return None
+
+    def install_webdriver(self, dest=None, channel=None, browser_binary=None):
+        raise NotImplementedError
+
+    def version(self, binary=None, webdriver_binary=None):
+        return None
diff --git a/tools/wpt/run.py b/tools/wpt/run.py
index 560cbe38fb..f177b67679 100644
--- a/tools/wpt/run.py
+++ b/tools/wpt/run.py
@@ -725,6 +725,17 @@ class Epiphany(BrowserSetup):
             kwargs["webdriver_binary"] = webdriver_binary
 
 
+class SerenityOSBrowser(BrowserSetup):
+    name = "serenityos_browser"
+    browser_cls = browser.SerenityOSBrowser
+
+    def install(self, channel=None):
+        raise NotImplementedError
+
+    def setup_kwargs(self, kwargs):
+        pass
+
+
 product_setup = {
     "android_weblayer": AndroidWeblayer,
     "android_webview": AndroidWebview,
@@ -747,6 +758,7 @@ product_setup = {
     "webkit": WebKit,
     "webkitgtk_minibrowser": WebKitGTKMiniBrowser,
     "epiphany": Epiphany,
+    "serenityos_browser": SerenityOSBrowser,
 }
 
 
diff --git a/tools/wptrunner/wptrunner/browsers/__init__.py b/tools/wptrunner/wptrunner/browsers/__init__.py
index b2a53ca23a..88aff48d31 100644
--- a/tools/wptrunner/wptrunner/browsers/__init__.py
+++ b/tools/wptrunner/wptrunner/browsers/__init__.py
@@ -42,4 +42,5 @@ product_list = ["android_weblayer",
                 "opera",
                 "webkit",
                 "webkitgtk_minibrowser",
-                "epiphany"]
+                "epiphany",
+                "serenityos_browser"]
diff --git a/tools/wptrunner/wptrunner/browsers/serenityos_browser.py b/tools/wptrunner/wptrunner/browsers/serenityos_browser.py
new file mode 100644
index 0000000000..357b4166a2
--- /dev/null
+++ b/tools/wptrunner/wptrunner/browsers/serenityos_browser.py
@@ -0,0 +1,55 @@
+# mypy: allow-untyped-defs
+
+from .base import (WebDriverBrowser,
+                   get_timeout_multiplier,  # noqa: F401
+                   maybe_add_args)
+from ..executors import executor_kwargs as base_executor_kwargs
+from ..executors.base import WdspecExecutor  # noqa: F401
+from ..executors.executorwebdriver import (WebDriverTestharnessExecutor,  # noqa: F401
+                                           WebDriverRefTestExecutor,  # noqa: F401
+                                           WebDriverCrashtestExecutor)  # noqa: F401
+
+__wptrunner__ = {"product": "serenityos_browser",
+                 "check_args": "check_args",
+                 "browser": "WebDriverBrowser",
+                 "browser_kwargs": "browser_kwargs",
+                 "executor": {"testharness": "WebDriverTestharnessExecutor",
+                              "reftest": "WebDriverRefTestExecutor",
+                              "wdspec": "WdspecExecutor",
+                              "crashtest": "WebDriverCrashtestExecutor"},
+                 "executor_kwargs": "executor_kwargs",
+                 "env_extras": "env_extras",
+                 "env_options": "env_options",
+                 "run_info_extras": "run_info_extras",
+                 "timeout_multiplier": "get_timeout_multiplier"}
+
+def check_args(**kwargs):
+    pass
+
+
+def browser_kwargs(logger, test_type, run_info_data, config, **kwargs):
+    return {"webdriver_binary": "true", "port": 8000}
+
+
+def capabilities(server_config, **kwargs):
+    return {}
+
+
+def executor_kwargs(logger, test_type, test_environment, run_info_data,
+                    **kwargs):
+    executor_kwargs = base_executor_kwargs(test_type, test_environment, run_info_data, **kwargs)
+    executor_kwargs["close_after_done"] = True
+    executor_kwargs["capabilities"] = capabilities(test_environment.config, **kwargs)
+    return executor_kwargs
+
+
+def env_extras(**kwargs):
+    return []
+
+
+def env_options():
+    return {}
+
+
+def run_info_extras(**kwargs):
+    return {}
diff --git a/tools/wptrunner/wptrunner/executors/executorwebdriver.py b/tools/wptrunner/wptrunner/executors/executorwebdriver.py
index e3cbb95f2e..e600f31fa2 100644
--- a/tools/wptrunner/wptrunner/executors/executorwebdriver.py
+++ b/tools/wptrunner/wptrunner/executors/executorwebdriver.py
@@ -136,6 +136,9 @@ class WebDriverTestharnessProtocolPart(TestharnessProtocolPart):
         :param timeout: The time in seconds to wait for the window to appear. This is because in
                         some implementations there's a race between calling window.open and the
                         window being added to the list of WebDriver accessible windows."""
+        # FIXME: I stubbed out window.open() to return the parent window, obviously needs more work
+        return parent
+
         test_window = None
         end_time = time.time() + timeout
         while time.time() < end_time:
diff --git a/wpt b/wpt
index b0e415d844..fd1e3ab5a1 100755
--- a/wpt
+++ b/wpt
@@ -1,3 +1,4 @@
+#!/var/home/linus/Dev/wpt/_venv3/bin/python
 #!/usr/bin/env python3
 
 if __name__ == "__main__":