Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 1978 insertions, 0 deletions

diff --git a/testing/marionette/harness/marionette_harness/runner/__init__.py b/testing/marionette/harness/marionette_harness/runner/__init__.py
new file mode 100644
index 0000000000..2fdac637d3
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/runner/__init__.py
@@ -0,0 +1,16 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from .base import (
+    BaseMarionetteArguments,
+    BaseMarionetteTestRunner,
+    Marionette,
+    MarionetteTest,
+    MarionetteTestResult,
+    MarionetteTextTestRunner,
+    TestManifest,
+    TestResult,
+    TestResultCollection,
+)
+from .mixins import WindowManagerMixin
diff --git a/testing/marionette/harness/marionette_harness/runner/base.py b/testing/marionette/harness/marionette_harness/runner/base.py
new file mode 100644
index 0000000000..b5ddc2d788
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/runner/base.py
@@ -0,0 +1,1265 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import json
+import os
+import random
+import re
+import socket
+import sys
+import time
+import traceback
+import unittest
+from argparse import ArgumentParser
+from collections import defaultdict
+from copy import deepcopy
+
+import mozinfo
+import moznetwork
+import mozprofile
+import mozversion
+import six
+from manifestparser import TestManifest
+from manifestparser.filters import tags
+from marionette_driver.marionette import Marionette
+from moztest.adapters.unit import StructuredTestResult, StructuredTestRunner
+from moztest.results import TestResult, TestResultCollection, relevant_line
+from six import MAXSIZE, reraise
+
+from . import serve
+
+here = os.path.abspath(os.path.dirname(__file__))
+
+
+def update_mozinfo(path=None):
+    """Walk up directories to find mozinfo.json and update the info."""
+    path = path or here
+    dirs = set()
+    while path != os.path.expanduser("~"):
+        if path in dirs:
+            break
+        dirs.add(path)
+        path = os.path.split(path)[0]
+
+    return mozinfo.find_and_update_from_json(*dirs)
+
+
+class MarionetteTest(TestResult):
+    @property
+    def test_name(self):
+        if self.test_class is not None:
+            return "{0}.py {1}.{2}".format(
+                self.test_class.split(".")[0], self.test_class, self.name
+            )
+        else:
+            return self.name
+
+
+class MarionetteTestResult(StructuredTestResult, TestResultCollection):
+    resultClass = MarionetteTest
+
+    def __init__(self, *args, **kwargs):
+        self.marionette = kwargs.pop("marionette")
+        TestResultCollection.__init__(self, "MarionetteTest")
+        self.passed = 0
+        self.testsRun = 0
+        self.result_modifiers = []  # used by mixins to modify the result
+        StructuredTestResult.__init__(self, *args, **kwargs)
+
+    @property
+    def skipped(self):
+        return [t for t in self if t.result == "SKIPPED"]
+
+    @skipped.setter
+    def skipped(self, value):
+        pass
+
+    @property
+    def expectedFailures(self):
+        return [t for t in self if t.result == "KNOWN-FAIL"]
+
+    @expectedFailures.setter
+    def expectedFailures(self, value):
+        pass
+
+    @property
+    def unexpectedSuccesses(self):
+        return [t for t in self if t.result == "UNEXPECTED-PASS"]
+
+    @unexpectedSuccesses.setter
+    def unexpectedSuccesses(self, value):
+        pass
+
+    @property
+    def tests_passed(self):
+        return [t for t in self if t.result == "PASS"]
+
+    @property
+    def errors(self):
+        return [t for t in self if t.result == "ERROR"]
+
+    @errors.setter
+    def errors(self, value):
+        pass
+
+    @property
+    def failures(self):
+        return [t for t in self if t.result == "UNEXPECTED-FAIL"]
+
+    @failures.setter
+    def failures(self, value):
+        pass
+
+    @property
+    def duration(self):
+        if self.stop_time:
+            return self.stop_time - self.start_time
+        else:
+            return 0
+
+    def add_test_result(
+        self,
+        test,
+        result_expected="PASS",
+        result_actual="PASS",
+        output="",
+        context=None,
+        **kwargs
+    ):
+        def get_class(test):
+            return test.__class__.__module__ + "." + test.__class__.__name__
+
+        name = str(test).split()[0]
+        test_class = get_class(test)
+        if hasattr(test, "jsFile"):
+            name = os.path.basename(test.jsFile)
+            test_class = None
+
+        t = self.resultClass(
+            name=name,
+            test_class=test_class,
+            time_start=test.start_time,
+            result_expected=result_expected,
+            context=context,
+            **kwargs
+        )
+        # call any registered result modifiers
+        for modifier in self.result_modifiers:
+            result_expected, result_actual, output, context = modifier(
+                t, result_expected, result_actual, output, context
+            )
+        t.finish(
+            result_actual,
+            time_end=time.time() if test.start_time else 0,
+            reason=relevant_line(output),
+            output=output,
+        )
+        self.append(t)
+
+    def addError(self, test, err):
+        self.add_test_result(
+            test, output=self._exc_info_to_string(err, test), result_actual="ERROR"
+        )
+        super(MarionetteTestResult, self).addError(test, err)
+
+    def addFailure(self, test, err):
+        self.add_test_result(
+            test,
+            output=self._exc_info_to_string(err, test),
+            result_actual="UNEXPECTED-FAIL",
+        )
+        super(MarionetteTestResult, self).addFailure(test, err)
+
+    def addSuccess(self, test):
+        self.passed += 1
+        self.add_test_result(test, result_actual="PASS")
+        super(MarionetteTestResult, self).addSuccess(test)
+
+    def addExpectedFailure(self, test, err):
+        """Called when an expected failure/error occured."""
+        self.add_test_result(
+            test, output=self._exc_info_to_string(err, test), result_actual="KNOWN-FAIL"
+        )
+        super(MarionetteTestResult, self).addExpectedFailure(test, err)
+
+    def addUnexpectedSuccess(self, test):
+        """Called when a test was expected to fail, but succeed."""
+        self.add_test_result(test, result_actual="UNEXPECTED-PASS")
+        super(MarionetteTestResult, self).addUnexpectedSuccess(test)
+
+    def addSkip(self, test, reason):
+        self.add_test_result(test, output=reason, result_actual="SKIPPED")
+        super(MarionetteTestResult, self).addSkip(test, reason)
+
+    def getInfo(self, test):
+        return test.test_name
+
+    def getDescription(self, test):
+        doc_first_line = test.shortDescription()
+        if self.descriptions and doc_first_line:
+            return "\n".join((str(test), doc_first_line))
+        else:
+            desc = str(test)
+            return desc
+
+    def printLogs(self, test):
+        for testcase in test._tests:
+            if hasattr(testcase, "loglines") and testcase.loglines:
+                # Don't dump loglines to the console if they only contain
+                # TEST-START and TEST-END.
+                skip_log = True
+                for line in testcase.loglines:
+                    str_line = " ".join(line)
+                    if "TEST-END" not in str_line and "TEST-START" not in str_line:
+                        skip_log = False
+                        break
+                if skip_log:
+                    return
+                self.logger.info("START LOG:")
+                for line in testcase.loglines:
+                    self.logger.info(" ".join(line).encode("ascii", "replace"))
+                self.logger.info("END LOG:")
+
+    def stopTest(self, *args, **kwargs):
+        unittest._TextTestResult.stopTest(self, *args, **kwargs)
+        if self.marionette.check_for_crash():
+            # this tells unittest.TestSuite not to continue running tests
+            self.shouldStop = True
+            test = next((a for a in args if isinstance(a, unittest.TestCase)), None)
+            if test:
+                self.addError(test, sys.exc_info())
+
+
+class MarionetteTextTestRunner(StructuredTestRunner):
+    resultclass = MarionetteTestResult
+
+    def __init__(self, **kwargs):
+        self.marionette = kwargs.pop("marionette")
+        self.capabilities = kwargs.pop("capabilities")
+
+        StructuredTestRunner.__init__(self, **kwargs)
+
+    def _makeResult(self):
+        return self.resultclass(
+            self.stream,
+            self.descriptions,
+            self.verbosity,
+            marionette=self.marionette,
+            logger=self.logger,
+            result_callbacks=self.result_callbacks,
+        )
+
+    def run(self, test):
+        result = super(MarionetteTextTestRunner, self).run(test)
+        result.printLogs(test)
+        return result
+
+
+class BaseMarionetteArguments(ArgumentParser):
+    def __init__(self, **kwargs):
+        ArgumentParser.__init__(self, **kwargs)
+
+        def dir_path(path):
+            path = os.path.abspath(os.path.expanduser(path))
+            if not os.access(path, os.F_OK):
+                os.makedirs(path)
+            return path
+
+        self.argument_containers = []
+        self.add_argument(
+            "tests",
+            nargs="*",
+            default=[],
+            help="Tests to run. "
+            "One or more paths to test files (Python or JS), "
+            "manifest files (.toml) or directories. "
+            "When a directory is specified, "
+            "all test files in the directory will be run.",
+        )
+        self.add_argument(
+            "--binary",
+            help="path to gecko executable to launch before running the test",
+        )
+        self.add_argument(
+            "--address", help="host:port of running Gecko instance to connect to"
+        )
+        self.add_argument(
+            "--emulator",
+            action="store_true",
+            help="If no --address is given, then the harness will launch an "
+            "emulator. (See Remote options group.) "
+            "If --address is given, then the harness assumes you are "
+            "running an emulator already, and will launch gecko app "
+            "on that emulator.",
+        )
+        self.add_argument(
+            "--app", help="application to use. see marionette_driver.geckoinstance"
+        )
+        self.add_argument(
+            "--app-arg",
+            dest="app_args",
+            action="append",
+            default=[],
+            help="specify a command line argument to be passed onto the application",
+        )
+        self.add_argument(
+            "--profile",
+            help="profile to use when launching the gecko process. If not passed, "
+            "then a profile will be constructed and used",
+            type=dir_path,
+        )
+        self.add_argument(
+            "--setpref",
+            action="append",
+            metavar="PREF=VALUE",
+            dest="prefs_args",
+            help="set a browser preference; repeat for multiple preferences.",
+        )
+        self.add_argument(
+            "--preferences",
+            action="append",
+            dest="prefs_files",
+            help="read preferences from a JSON or TOML file. For TOML, use "
+            "'file.toml:section' to specify a particular section.",
+        )
+        self.add_argument(
+            "--addon",
+            action="append",
+            dest="addons",
+            help="addon to install; repeat for multiple addons.",
+        )
+        self.add_argument(
+            "--repeat", type=int, help="number of times to repeat the test(s)"
+        )
+        self.add_argument(
+            "--run-until-failure",
+            action="store_true",
+            help="Run tests repeatedly and stop on the first time a test fails. "
+            "Default cap is 30 runs, which can be overwritten "
+            "with the --repeat parameter.",
+        )
+        self.add_argument(
+            "--testvars",
+            action="append",
+            help="path to a json file with any test data required",
+        )
+        self.add_argument(
+            "--symbols-path",
+            help="absolute path to directory containing breakpad symbols, or the "
+            "url of a zip file containing symbols",
+        )
+        self.add_argument(
+            "--socket-timeout",
+            type=float,
+            default=Marionette.DEFAULT_SOCKET_TIMEOUT,
+            help="Set the global timeout for marionette socket operations."
+            " Default: %(default)ss.",
+        )
+        self.add_argument(
+            "--startup-timeout",
+            type=int,
+            default=Marionette.DEFAULT_STARTUP_TIMEOUT,
+            help="the max number of seconds to wait for a Marionette connection "
+            "after launching a binary. Default: %(default)ss.",
+        )
+        self.add_argument(
+            "--shuffle",
+            action="store_true",
+            default=False,
+            help="run tests in a random order",
+        )
+        self.add_argument(
+            "--shuffle-seed",
+            type=int,
+            default=random.randint(0, MAXSIZE),
+            help="Use given seed to shuffle tests",
+        )
+        self.add_argument(
+            "--total-chunks",
+            type=int,
+            help="how many chunks to split the tests up into",
+        )
+        self.add_argument("--this-chunk", type=int, help="which chunk to run")
+        self.add_argument(
+            "--server-root",
+            help="url to a webserver or path to a document root from which content "
+            "resources are served (default: {}).".format(
+                os.path.join(os.path.dirname(here), "www")
+            ),
+        )
+        self.add_argument(
+            "--gecko-log",
+            help="Define the path to store log file. If the path is"
+            " a directory, the real log file will be created"
+            " given the format gecko-(timestamp).log. If it is"
+            " a file, if will be used directly. '-' may be passed"
+            " to write to stdout. Default: './gecko.log'",
+        )
+        self.add_argument(
+            "--logger-name",
+            default="Marionette-based Tests",
+            help="Define the name to associate with the logger used",
+        )
+        self.add_argument(
+            "--jsdebugger",
+            action="store_true",
+            default=False,
+            help="Enable the jsdebugger for marionette javascript.",
+        )
+        self.add_argument(
+            "--pydebugger",
+            help="Enable python post-mortem debugger when a test fails."
+            " Pass in the debugger you want to use, eg pdb or ipdb.",
+        )
+        self.add_argument(
+            "--disable-fission",
+            action="store_true",
+            dest="disable_fission",
+            default=False,
+            help="Disable Fission (site isolation) in Gecko.",
+        )
+        self.add_argument(
+            "-z",
+            "--headless",
+            action="store_true",
+            dest="headless",
+            default=os.environ.get("MOZ_HEADLESS", False),
+            help="Run tests in headless mode.",
+        )
+        self.add_argument(
+            "--tag",
+            action="append",
+            dest="test_tags",
+            default=None,
+            help="Filter out tests that don't have the given tag. Can be "
+            "used multiple times in which case the test must contain "
+            "at least one of the given tags.",
+        )
+        self.add_argument(
+            "--workspace",
+            action="store",
+            default=None,
+            help="Path to directory for Marionette output. "
+            "(Default: .) (Default profile dest: TMP)",
+            type=dir_path,
+        )
+        self.add_argument(
+            "-v",
+            "--verbose",
+            action="count",
+            help="Increase verbosity to include debug messages with -v, "
+            "and trace messages with -vv.",
+        )
+        self.register_argument_container(RemoteMarionetteArguments())
+
+    def register_argument_container(self, container):
+        group = self.add_argument_group(container.name)
+
+        for cli, kwargs in container.args:
+            group.add_argument(*cli, **kwargs)
+
+        self.argument_containers.append(container)
+
+    def parse_known_args(self, args=None, namespace=None):
+        args, remainder = ArgumentParser.parse_known_args(self, args, namespace)
+        for container in self.argument_containers:
+            if hasattr(container, "parse_args_handler"):
+                container.parse_args_handler(args)
+        return (args, remainder)
+
+    def _get_preferences(self, prefs_files, prefs_args):
+        """Return user defined profile preferences as a dict."""
+        # object that will hold the preferences
+        prefs = mozprofile.prefs.Preferences()
+
+        # add preferences files
+        if prefs_files:
+            for prefs_file in prefs_files:
+                prefs.add_file(prefs_file)
+
+        separator = "="
+        cli_prefs = []
+        if prefs_args:
+            misformatted = []
+            for pref in prefs_args:
+                if separator not in pref:
+                    misformatted.append(pref)
+                else:
+                    cli_prefs.append(pref.split(separator, 1))
+            if misformatted:
+                self._print_message(
+                    "Warning: Ignoring preferences not in key{}value format: {}\n".format(
+                        separator, ", ".join(misformatted)
+                    )
+                )
+        # string preferences
+        prefs.add(cli_prefs, cast=True)
+
+        return dict(prefs())
+
+    def verify_usage(self, args):
+        if not args.tests:
+            self.error(
+                "You must specify one or more test files, manifests, or directories."
+            )
+
+        missing_tests = [path for path in args.tests if not os.path.exists(path)]
+        if missing_tests:
+            self.error(
+                "Test file(s) not found: " + " ".join([path for path in missing_tests])
+            )
+
+        if not args.address and not args.binary and not args.emulator:
+            self.error("You must specify --binary, or --address, or --emulator")
+
+        if args.repeat is not None and args.repeat < 0:
+            self.error("The value of --repeat has to be equal or greater than 0.")
+
+        if args.total_chunks is not None and args.this_chunk is None:
+            self.error("You must specify which chunk to run.")
+
+        if args.this_chunk is not None and args.total_chunks is None:
+            self.error("You must specify how many chunks to split the tests into.")
+
+        if args.total_chunks is not None:
+            if not 1 < args.total_chunks:
+                self.error("Total chunks must be greater than 1.")
+            if not 1 <= args.this_chunk <= args.total_chunks:
+                self.error(
+                    "Chunk to run must be between 1 and {}.".format(args.total_chunks)
+                )
+
+        if args.jsdebugger:
+            args.app_args.append("-jsdebugger")
+            args.socket_timeout = None
+
+        args.prefs = self._get_preferences(args.prefs_files, args.prefs_args)
+
+        for container in self.argument_containers:
+            if hasattr(container, "verify_usage_handler"):
+                container.verify_usage_handler(args)
+
+        return args
+
+
+class RemoteMarionetteArguments(object):
+    name = "Remote (Emulator/Device)"
+    args = [
+        [
+            ["--emulator-binary"],
+            {
+                "help": "Path to emulator binary. By default mozrunner uses `which emulator`",
+                "dest": "emulator_bin",
+            },
+        ],
+        [
+            ["--adb"],
+            {
+                "help": "Path to the adb. By default mozrunner uses `which adb`",
+                "dest": "adb_path",
+            },
+        ],
+        [
+            ["--avd"],
+            {
+                "help": (
+                    "Name of an AVD available in your environment."
+                    "See mozrunner.FennecEmulatorRunner"
+                ),
+            },
+        ],
+        [
+            ["--avd-home"],
+            {
+                "help": "Path to avd parent directory",
+            },
+        ],
+        [
+            ["--device"],
+            {
+                "help": (
+                    "Serial ID to connect to as seen in `adb devices`,"
+                    "e.g emulator-5444"
+                ),
+                "dest": "device_serial",
+            },
+        ],
+        [
+            ["--package"],
+            {
+                "help": "Name of Android package, e.g. org.mozilla.fennec",
+                "dest": "package_name",
+            },
+        ],
+    ]
+
+
+class Fixtures(object):
+    def where_is(self, uri, on="http"):
+        return serve.where_is(uri, on)
+
+
+class BaseMarionetteTestRunner(object):
+    textrunnerclass = MarionetteTextTestRunner
+    driverclass = Marionette
+
+    def __init__(
+        self,
+        address=None,
+        app=None,
+        app_args=None,
+        binary=None,
+        profile=None,
+        logger=None,
+        logdir=None,
+        repeat=None,
+        run_until_failure=None,
+        testvars=None,
+        symbols_path=None,
+        shuffle=False,
+        shuffle_seed=random.randint(0, MAXSIZE),
+        this_chunk=1,
+        total_chunks=1,
+        server_root=None,
+        gecko_log=None,
+        result_callbacks=None,
+        prefs=None,
+        test_tags=None,
+        socket_timeout=None,
+        startup_timeout=None,
+        addons=None,
+        workspace=None,
+        verbose=0,
+        emulator=False,
+        headless=False,
+        disable_fission=False,
+        **kwargs
+    ):
+        self._appName = None
+        self._capabilities = None
+        self._filename_pattern = None
+        self._version_info = {}
+
+        self.fixture_servers = {}
+        self.fixtures = Fixtures()
+        self.extra_kwargs = kwargs
+        self.test_kwargs = deepcopy(kwargs)
+        self.address = address
+        self.app = app
+        self.app_args = app_args or []
+        self.bin = binary
+        self.emulator = emulator
+        self.profile = profile
+        self.addons = addons
+        self.logger = logger
+        self.marionette = None
+        self.logdir = logdir
+        self.repeat = repeat or 0
+        self.run_until_failure = run_until_failure or False
+        self.symbols_path = symbols_path
+        self.socket_timeout = socket_timeout
+        self.startup_timeout = startup_timeout
+        self.shuffle = shuffle
+        self.shuffle_seed = shuffle_seed
+        self.server_root = server_root
+        self.this_chunk = this_chunk
+        self.total_chunks = total_chunks
+        self.mixin_run_tests = []
+        self.manifest_skipped_tests = []
+        self.tests = []
+        self.result_callbacks = result_callbacks or []
+        self.prefs = prefs or {}
+        self.test_tags = test_tags
+        self.workspace = workspace
+        # If no workspace is set, default location for gecko.log is .
+        # and default location for profile is TMP
+        self.workspace_path = workspace or os.getcwd()
+        self.verbose = verbose
+        self.headless = headless
+
+        self.prefs.update({"fission.autostart": not disable_fission})
+
+        # If no repeat has been set, default to 30 extra runs
+        if self.run_until_failure and repeat is None:
+            self.repeat = 30
+
+        def gather_debug(test, status):
+            # No screenshots and page source for skipped tests
+            if status == "SKIP":
+                return
+
+            rv = {}
+            marionette = test._marionette_weakref()
+
+            # In the event we're gathering debug without starting a session,
+            # skip marionette commands
+            if marionette.session is not None:
+                try:
+                    with marionette.using_context(marionette.CONTEXT_CHROME):
+                        rv["screenshot"] = marionette.screenshot()
+                    with marionette.using_context(marionette.CONTEXT_CONTENT):
+                        rv["source"] = marionette.page_source
+                except Exception as exc:
+                    self.logger.warning(
+                        "Failed to gather test failure debug: {}".format(exc)
+                    )
+            return rv
+
+        self.result_callbacks.append(gather_debug)
+
+        # testvars are set up in self.testvars property
+        self._testvars = None
+        self.testvars_paths = testvars
+
+        self.test_handlers = []
+
+        self.reset_test_stats()
+
+        self.logger.info(
+            "Using workspace for temporary data: " '"{}"'.format(self.workspace_path)
+        )
+
+        if not gecko_log:
+            self.gecko_log = os.path.join(self.workspace_path or "", "gecko.log")
+        else:
+            self.gecko_log = gecko_log
+
+        self.results = []
+
+    @property
+    def filename_pattern(self):
+        if self._filename_pattern is None:
+            self._filename_pattern = re.compile("^test(((_.+?)+?\.((py))))$")
+
+        return self._filename_pattern
+
+    @property
+    def testvars(self):
+        if self._testvars is not None:
+            return self._testvars
+
+        self._testvars = {}
+
+        def update(d, u):
+            """Update a dictionary that may contain nested dictionaries."""
+            for k, v in six.iteritems(u):
+                o = d.get(k, {})
+                if isinstance(v, dict) and isinstance(o, dict):
+                    d[k] = update(d.get(k, {}), v)
+                else:
+                    d[k] = u[k]
+            return d
+
+        json_testvars = self._load_testvars()
+        for j in json_testvars:
+            self._testvars = update(self._testvars, j)
+        return self._testvars
+
+    def _load_testvars(self):
+        data = []
+        if self.testvars_paths is not None:
+            for path in list(self.testvars_paths):
+                path = os.path.abspath(os.path.expanduser(path))
+                if not os.path.exists(path):
+                    raise IOError("--testvars file {} does not exist".format(path))
+                try:
+                    with open(path) as f:
+                        data.append(json.loads(f.read()))
+                except ValueError as e:
+                    msg = "JSON file ({0}) is not properly formatted: {1}"
+                    reraise(
+                        ValueError,
+                        ValueError(msg.format(os.path.abspath(path), e)),
+                        sys.exc_info()[2],
+                    )
+        return data
+
+    @property
+    def capabilities(self):
+        if self._capabilities:
+            return self._capabilities
+
+        self.marionette.start_session()
+        self._capabilities = self.marionette.session_capabilities
+        self.marionette.delete_session()
+        return self._capabilities
+
+    @property
+    def appName(self):
+        if self._appName:
+            return self._appName
+
+        self._appName = self.capabilities.get("browserName")
+        return self._appName
+
+    @property
+    def bin(self):
+        return self._bin
+
+    @bin.setter
+    def bin(self, path):
+        """Set binary and reset parts of runner accordingly.
+        Intended use: to change binary between calls to run_tests
+        """
+        self._bin = path
+        self.tests = []
+        self.cleanup()
+
+    @property
+    def version_info(self):
+        if not self._version_info:
+            try:
+                # TODO: Get version_info in Fennec case
+                self._version_info = mozversion.get_version(binary=self.bin)
+            except Exception:
+                self.logger.warning(
+                    "Failed to retrieve version information for {}".format(self.bin)
+                )
+        return self._version_info
+
+    def reset_test_stats(self):
+        self.passed = 0
+        self.failed = 0
+        self.crashed = 0
+        self.unexpected_successes = 0
+        self.todo = 0
+        self.skipped = 0
+        self.failures = []
+
+    def _build_kwargs(self):
+        if self.logdir and not os.access(self.logdir, os.F_OK):
+            os.mkdir(self.logdir)
+
+        kwargs = {
+            "socket_timeout": self.socket_timeout,
+            "prefs": self.prefs,
+            "startup_timeout": self.startup_timeout,
+            "verbose": self.verbose,
+            "symbols_path": self.symbols_path,
+        }
+        if self.bin or self.emulator:
+            kwargs.update(
+                {
+                    "host": "127.0.0.1",
+                    "port": 2828,
+                    "app": self.app,
+                    "app_args": self.app_args,
+                    "profile": self.profile,
+                    "addons": self.addons,
+                    "gecko_log": self.gecko_log,
+                    # ensure Marionette class takes care of starting gecko instance
+                    "bin": True,
+                }
+            )
+
+        if self.bin:
+            kwargs.update(
+                {
+                    "bin": self.bin,
+                }
+            )
+
+        if self.emulator:
+            kwargs.update(
+                {
+                    "avd_home": self.extra_kwargs.get("avd_home"),
+                    "adb_path": self.extra_kwargs.get("adb_path"),
+                    "emulator_binary": self.extra_kwargs.get("emulator_bin"),
+                    "avd": self.extra_kwargs.get("avd"),
+                    "package_name": self.extra_kwargs.get("package_name"),
+                }
+            )
+
+        if self.address:
+            host, port = self.address.split(":")
+            kwargs.update(
+                {
+                    "host": host,
+                    "port": int(port),
+                }
+            )
+            if self.emulator:
+                kwargs.update(
+                    {
+                        "connect_to_running_emulator": True,
+                    }
+                )
+            if not self.bin and not self.emulator:
+                try:
+                    # Establish a socket connection so we can vertify the data come back
+                    connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+                    connection.connect((host, int(port)))
+                    connection.close()
+                except Exception as e:
+                    exc_cls, _, tb = sys.exc_info()
+                    msg = "Connection attempt to {0}:{1} failed with error: {2}"
+                    reraise(exc_cls, exc_cls(msg.format(host, port, e)), tb)
+        if self.workspace:
+            kwargs["workspace"] = self.workspace_path
+        if self.headless:
+            kwargs["headless"] = True
+
+        return kwargs
+
+    def record_crash(self):
+        crash = True
+        try:
+            crash = self.marionette.check_for_crash()
+            self.crashed += int(crash)
+        except Exception:
+            traceback.print_exc()
+        return crash
+
+    def _initialize_test_run(self, tests):
+        assert len(tests) > 0
+        assert len(self.test_handlers) > 0
+        self.reset_test_stats()
+
+    def _add_tests(self, tests):
+        for test in tests:
+            self.add_test(test)
+
+        invalid_tests = [
+            t["filepath"]
+            for t in self.tests
+            if not self._is_filename_valid(t["filepath"])
+        ]
+        if invalid_tests:
+            raise Exception(
+                "Test file names must be of the form "
+                "'test_something.py'."
+                " Invalid test names:\n  {}".format("\n  ".join(invalid_tests))
+            )
+
+    def _is_filename_valid(self, filename):
+        filename = os.path.basename(filename)
+        return self.filename_pattern.match(filename)
+
+    def _fix_test_path(self, path):
+        """Normalize a logged test path from the test package."""
+        test_path_prefixes = [
+            "tests{}".format(os.path.sep),
+        ]
+
+        path = os.path.relpath(path)
+        for prefix in test_path_prefixes:
+            if path.startswith(prefix):
+                path = path[len(prefix) :]
+                break
+        path = path.replace("\\", "/")
+
+        return path
+
+    def _log_skipped_tests(self):
+        for test in self.manifest_skipped_tests:
+            rel_path = None
+            if os.path.exists(test["path"]):
+                rel_path = self._fix_test_path(test["path"])
+
+            self.logger.test_start(rel_path)
+            self.logger.test_end(rel_path, "SKIP", message=test["disabled"])
+            self.todo += 1
+
+    def run_tests(self, tests):
+        start_time = time.time()
+        self._initialize_test_run(tests)
+
+        if self.marionette is None:
+            self.marionette = self.driverclass(**self._build_kwargs())
+            self.logger.info("Profile path is %s" % self.marionette.profile_path)
+
+        if len(self.fixture_servers) == 0 or any(
+            not server.is_alive for _, server in self.fixture_servers
+        ):
+            self.logger.info("Starting fixture servers")
+            self.fixture_servers = self.start_fixture_servers()
+            for url in serve.iter_url(self.fixture_servers):
+                self.logger.info("Fixture server listening on %s" % url)
+
+            # backwards compatibility
+            self.marionette.baseurl = serve.where_is("/")
+
+        self._add_tests(tests)
+
+        device_info = None
+        if self.marionette.instance and self.emulator:
+            try:
+                device_info = self.marionette.instance.runner.device.device.get_info()
+            except Exception:
+                self.logger.warning("Could not get device info", exc_info=True)
+
+        tests_by_group = defaultdict(list)
+        for test in self.tests:
+            group = self._fix_test_path(test["group"])
+            filepath = self._fix_test_path(test["filepath"])
+            tests_by_group[group].append(filepath)
+
+        self.logger.suite_start(
+            tests_by_group,
+            name="marionette-test",
+            version_info=self.version_info,
+            device_info=device_info,
+        )
+
+        if self.shuffle:
+            self.logger.info("Using shuffle seed: %d" % self.shuffle_seed)
+
+        self._log_skipped_tests()
+
+        interrupted = None
+        try:
+            repeat_index = 0
+            while repeat_index <= self.repeat:
+                if repeat_index > 0:
+                    self.logger.info("\nREPEAT {}\n-------".format(repeat_index))
+                self.run_test_sets()
+                if self.run_until_failure and self.failed > 0:
+                    break
+
+                repeat_index += 1
+
+        except KeyboardInterrupt:
+            # in case of KeyboardInterrupt during the test execution
+            # we want to display current test results.
+            # so we keep the exception to raise it later.
+            interrupted = sys.exc_info()
+        except Exception:
+            # For any other exception we return immediately and have to
+            # cleanup running processes
+            self.cleanup()
+            raise
+
+        try:
+            self._print_summary(tests)
+            self.record_crash()
+            self.elapsedtime = time.time() - start_time
+
+            for run_tests in self.mixin_run_tests:
+                run_tests(tests)
+
+            self.logger.suite_end()
+        except Exception:
+            # raise only the exception if we were not interrupted
+            if not interrupted:
+                raise
+        finally:
+            self.cleanup()
+
+            # reraise previous interruption now
+            if interrupted:
+                reraise(interrupted[0], interrupted[1], interrupted[2])
+
+    def _print_summary(self, tests):
+        self.logger.info("\nSUMMARY\n-------")
+        self.logger.info("passed: {}".format(self.passed))
+        if self.unexpected_successes == 0:
+            self.logger.info("failed: {}".format(self.failed))
+        else:
+            self.logger.info(
+                "failed: {0} (unexpected sucesses: {1})".format(
+                    self.failed, self.unexpected_successes
+                )
+            )
+        if self.skipped == 0:
+            self.logger.info("todo: {}".format(self.todo))
+        else:
+            self.logger.info("todo: {0} (skipped: {1})".format(self.todo, self.skipped))
+
+        if self.failed > 0:
+            self.logger.info("\nFAILED TESTS\n-------")
+            for failed_test in self.failures:
+                self.logger.info("{}".format(failed_test[0]))
+
+    def start_fixture_servers(self):
+        root = self.server_root or os.path.join(os.path.dirname(here), "www")
+        if self.appName == "fennec":
+            return serve.start(root, host=moznetwork.get_ip())
+        else:
+            return serve.start(root)
+
+    def add_test(self, test, expected="pass", group="default"):
+        filepath = os.path.abspath(test)
+
+        if os.path.isdir(filepath):
+            for root, dirs, files in os.walk(filepath):
+                for filename in files:
+                    if filename.endswith(".toml"):
+                        msg_tmpl = (
+                            "Ignoring manifest '{0}'; running all tests in '{1}'."
+                            " See --help for details."
+                        )
+                        relpath = os.path.relpath(
+                            os.path.join(root, filename), filepath
+                        )
+                        self.logger.warning(msg_tmpl.format(relpath, filepath))
+                    elif self._is_filename_valid(filename):
+                        test_file = os.path.join(root, filename)
+                        self.add_test(test_file)
+            return
+
+        file_ext = os.path.splitext(os.path.split(filepath)[-1])[1]
+
+        if file_ext == ".toml":
+            group = filepath
+
+            manifest = TestManifest()
+            manifest.read(filepath)
+
+            json_path = update_mozinfo(filepath)
+            mozinfo.update(
+                {
+                    "appname": self.appName,
+                    "manage_instance": self.marionette.instance is not None,
+                    "headless": self.headless,
+                }
+            )
+            self.logger.info("mozinfo updated from: {}".format(json_path))
+            self.logger.info("mozinfo is: {}".format(mozinfo.info))
+
+            filters = []
+            if self.test_tags:
+                filters.append(tags(self.test_tags))
+
+            manifest_tests = manifest.active_tests(
+                exists=False, disabled=True, filters=filters, **mozinfo.info
+            )
+            if len(manifest_tests) == 0:
+                self.logger.error(
+                    "No tests to run using specified "
+                    "combination of filters: {}".format(manifest.fmt_filters())
+                )
+
+            target_tests = []
+            for test in manifest_tests:
+                if test.get("disabled"):
+                    self.manifest_skipped_tests.append(test)
+                else:
+                    target_tests.append(test)
+
+            for i in target_tests:
+                if not os.path.exists(i["path"]):
+                    raise IOError("test file: {} does not exist".format(i["path"]))
+
+                self.add_test(i["path"], i["expected"], group=group)
+            return
+
+        self.tests.append({"filepath": filepath, "expected": expected, "group": group})
+
+    def run_test(self, filepath, expected):
+        testloader = unittest.TestLoader()
+        suite = unittest.TestSuite()
+        self.test_kwargs["expected"] = expected
+        mod_name = os.path.splitext(os.path.split(filepath)[-1])[0]
+        for handler in self.test_handlers:
+            if handler.match(os.path.basename(filepath)):
+                handler.add_tests_to_suite(
+                    mod_name,
+                    filepath,
+                    suite,
+                    testloader,
+                    self.marionette,
+                    self.fixtures,
+                    self.testvars,
+                    **self.test_kwargs
+                )
+                break
+
+        if suite.countTestCases():
+            runner = self.textrunnerclass(
+                logger=self.logger,
+                marionette=self.marionette,
+                capabilities=self.capabilities,
+                result_callbacks=self.result_callbacks,
+            )
+
+            results = runner.run(suite)
+            self.results.append(results)
+
+            self.failed += len(results.failures) + len(results.errors)
+            if hasattr(results, "skipped"):
+                self.skipped += len(results.skipped)
+                self.todo += len(results.skipped)
+            self.passed += results.passed
+            for failure in results.failures + results.errors:
+                self.failures.append(
+                    (results.getInfo(failure), failure.output, "TEST-UNEXPECTED-FAIL")
+                )
+            if hasattr(results, "unexpectedSuccesses"):
+                self.failed += len(results.unexpectedSuccesses)
+                self.unexpected_successes += len(results.unexpectedSuccesses)
+                for failure in results.unexpectedSuccesses:
+                    self.failures.append(
+                        (
+                            results.getInfo(failure),
+                            failure.output,
+                            "TEST-UNEXPECTED-PASS",
+                        )
+                    )
+            if hasattr(results, "expectedFailures"):
+                self.todo += len(results.expectedFailures)
+
+            self.mixin_run_tests = []
+            for result in self.results:
+                result.result_modifiers = []
+
+    def run_test_set(self, tests):
+        if self.shuffle:
+            random.seed(self.shuffle_seed)
+            random.shuffle(tests)
+
+        for test in tests:
+            self.run_test(test["filepath"], test["expected"])
+            if self.record_crash():
+                break
+
+    def run_test_sets(self):
+        if len(self.tests) < 1:
+            raise Exception("There are no tests to run.")
+        elif self.total_chunks is not None and self.total_chunks > len(self.tests):
+            raise ValueError(
+                "Total number of chunks must be between 1 and {}.".format(
+                    len(self.tests)
+                )
+            )
+        if self.total_chunks is not None and self.total_chunks > 1:
+            chunks = [[] for i in range(self.total_chunks)]
+            for i, test in enumerate(self.tests):
+                target_chunk = i % self.total_chunks
+                chunks[target_chunk].append(test)
+
+            self.logger.info(
+                "Running chunk {0} of {1} ({2} tests selected from a "
+                "total of {3})".format(
+                    self.this_chunk,
+                    self.total_chunks,
+                    len(chunks[self.this_chunk - 1]),
+                    len(self.tests),
+                )
+            )
+            self.tests = chunks[self.this_chunk - 1]
+
+        self.run_test_set(self.tests)
+
+    def cleanup(self):
+        for proc in serve.iter_proc(self.fixture_servers):
+            proc.stop()
+            proc.kill()
+        self.fixture_servers = {}
+
+        if hasattr(self, "marionette") and self.marionette:
+            if self.marionette.instance is not None:
+                if self.marionette.instance.runner.is_running():
+                    # Force a clean shutdown of the application process first if
+                    # it is still running. If that fails, kill the process.
+                    # Therefore a new session needs to be started.
+                    self.marionette.start_session()
+                    self.marionette.quit()
+
+                self.marionette.instance.close(clean=True)
+                self.marionette.instance = None
+
+            self.marionette.cleanup()
+            self.marionette = None
+
+    __del__ = cleanup
diff --git a/testing/marionette/harness/marionette_harness/runner/httpd.py b/testing/marionette/harness/marionette_harness/runner/httpd.py
new file mode 100755
index 0000000000..8ffc85aeb0
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/runner/httpd.py
@@ -0,0 +1,243 @@
+#!/usr/bin/env python
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+"""Specialisation of wptserver.server.WebTestHttpd for testing
+Marionette.
+
+"""
+
+import argparse
+import os
+import select
+import sys
+import time
+
+from six.moves.urllib import parse as urlparse
+from wptserve import handlers, request, server
+from wptserve import routes as default_routes
+
+root = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
+default_doc_root = os.path.join(root, "www")
+default_ssl_cert = os.path.join(root, "certificates", "test.cert")
+default_ssl_key = os.path.join(root, "certificates", "test.key")
+
+
+@handlers.handler
+def http_auth_handler(req, response):
+    # Allow the test to specify the username and password
+    params = dict(urlparse.parse_qsl(req.url_parts.query))
+    username = params.get("username", "guest")
+    password = params.get("password", "guest")
+
+    auth = request.Authentication(req.headers)
+    content = """<!doctype html>
+<title>HTTP Authentication</title>
+<p id="status">{}</p>"""
+
+    if auth.username == username and auth.password == password:
+        response.status = 200
+        response.content = content.format("success")
+
+    else:
+        response.status = 401
+        response.headers.set("WWW-Authenticate", 'Basic realm="secret"')
+        response.content = content.format("restricted")
+
+
+@handlers.handler
+def upload_handler(request, response):
+    return 200, [], [request.headers.get("Content-Type")] or []
+
+
+@handlers.handler
+def slow_loading_handler(request, response):
+    # Allow the test specify the delay for delivering the content
+    params = dict(urlparse.parse_qsl(request.url_parts.query))
+    delay = int(params.get("delay", 5))
+    time.sleep(delay)
+
+    # Do not allow the page to be cached to circumvent the bfcache of the browser
+    response.headers.set("Cache-Control", "no-cache, no-store")
+    response.content = """<!doctype html>
+<meta charset="UTF-8">
+<title>Slow page loading</title>
+
+<p>Delay: <span id="delay">{}</span></p>
+""".format(
+        delay
+    )
+
+
+@handlers.handler
+def slow_coop_handler(request, response):
+    # Allow the test specify the delay for delivering the content
+    params = dict(urlparse.parse_qsl(request.url_parts.query))
+    delay = int(params.get("delay", 5))
+    time.sleep(delay)
+
+    # Isolate the browsing context exclusively to same-origin documents
+    response.headers.set("Cross-Origin-Opener-Policy", "same-origin")
+    response.headers.set("Cache-Control", "no-cache, no-store")
+    response.content = """<!doctype html>
+<meta charset="UTF-8">
+<title>Slow cross-origin page loading</title>
+
+<p>Delay: <span id="delay">{}</span></p>
+""".format(
+        delay
+    )
+
+
+@handlers.handler
+def update_xml_handler(request, response):
+    response.headers.set("Content-Type", "text/xml")
+    mar_digest = (
+        "75cd68e6c98c84c435cd27e353f5b4f6a3f2c50f6802aa9bf62b47e47138757306769fd9befa08793635ee649"
+        "2319253480860b4aa8ed9ee1caaa4c83ebc90b9"
+    )
+    response.content = """
+    <updates>
+        <update type="minor" displayVersion="9999.0" appVersion="9999.0" platformVersion="9999.0"
+                buildID="20220627075547">
+            <patch type="complete" URL="{}://{}/update/complete.mar" size="86612"
+                   hashFunction="sha512" hashValue="{}"/>
+        </update>
+    </updates>
+    """.format(
+        request.url_parts.scheme, request.url_parts.netloc, mar_digest
+    )
+
+
+class NotAliveError(Exception):
+    """Occurs when attempting to run a function that requires the HTTPD
+    to have been started, and it has not.
+
+    """
+
+    pass
+
+
+class FixtureServer(object):
+    def __init__(
+        self,
+        doc_root,
+        url="http://127.0.0.1:0",
+        use_ssl=False,
+        ssl_cert=None,
+        ssl_key=None,
+    ):
+        if not os.path.isdir(doc_root):
+            raise ValueError("Server root is not a directory: %s" % doc_root)
+
+        url = urlparse.urlparse(url)
+        if url.scheme is None:
+            raise ValueError("Server scheme not provided")
+
+        scheme, host, port = url.scheme, url.hostname, url.port
+        if host is None:
+            host = "127.0.0.1"
+        if port is None:
+            port = 0
+
+        routes = [
+            ("POST", "/file_upload", upload_handler),
+            ("GET", "/http_auth", http_auth_handler),
+            ("GET", "/slow", slow_loading_handler),
+            ("GET", "/slow-coop", slow_coop_handler),
+            ("GET", "/update.xml", update_xml_handler),
+        ]
+        routes.extend(default_routes.routes)
+
+        self._httpd = server.WebTestHttpd(
+            host=host,
+            port=port,
+            bind_address=True,
+            doc_root=doc_root,
+            routes=routes,
+            use_ssl=True if scheme == "https" else False,
+            certificate=ssl_cert,
+            key_file=ssl_key,
+        )
+
+    def start(self):
+        if self.is_alive:
+            return
+        self._httpd.start()
+
+    def wait(self):
+        if not self.is_alive:
+            return
+        try:
+            select.select([], [], [])
+        except KeyboardInterrupt:
+            self.stop()
+
+    def stop(self):
+        if not self.is_alive:
+            return
+        self._httpd.stop()
+
+    def get_url(self, path):
+        if not self.is_alive:
+            raise NotAliveError()
+        return self._httpd.get_url(path)
+
+    @property
+    def doc_root(self):
+        return self._httpd.router.doc_root
+
+    @property
+    def router(self):
+        return self._httpd.router
+
+    @property
+    def routes(self):
+        return self._httpd.router.routes
+
+    @property
+    def is_alive(self):
+        return self._httpd.started
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Specialised HTTP server for testing Marionette."
+    )
+    parser.add_argument(
+        "url",
+        help="""
+service address including scheme, hostname, port, and prefix for document root,
+e.g. \"https://0.0.0.0:0/base/\"""",
+    )
+    parser.add_argument(
+        "-r",
+        dest="doc_root",
+        default=default_doc_root,
+        help="path to document root (default %(default)s)",
+    )
+    parser.add_argument(
+        "-c",
+        dest="ssl_cert",
+        default=default_ssl_cert,
+        help="path to SSL certificate (default %(default)s)",
+    )
+    parser.add_argument(
+        "-k",
+        dest="ssl_key",
+        default=default_ssl_key,
+        help="path to SSL certificate key (default %(default)s)",
+    )
+    args = parser.parse_args()
+
+    httpd = FixtureServer(
+        args.doc_root, args.url, ssl_cert=args.ssl_cert, ssl_key=args.ssl_key
+    )
+    httpd.start()
+    print(
+        "{0}: started fixture server on {1}".format(sys.argv[0], httpd.get_url("/")),
+        file=sys.stderr,
+    )
+    httpd.wait()
diff --git a/testing/marionette/harness/marionette_harness/runner/mixins/__init__.py b/testing/marionette/harness/marionette_harness/runner/mixins/__init__.py
new file mode 100644
index 0000000000..71b13461d5
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/runner/mixins/__init__.py
@@ -0,0 +1,5 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from .window_manager import WindowManagerMixin
diff --git a/testing/marionette/harness/marionette_harness/runner/mixins/window_manager.py b/testing/marionette/harness/marionette_harness/runner/mixins/window_manager.py
new file mode 100644
index 0000000000..85729cc585
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/runner/mixins/window_manager.py
@@ -0,0 +1,210 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import sys
+
+from marionette_driver import Wait
+from six import reraise
+
+
+class WindowManagerMixin(object):
+    def setUp(self):
+        super(WindowManagerMixin, self).setUp()
+
+        self.start_window = self.marionette.current_chrome_window_handle
+        self.start_windows = self.marionette.chrome_window_handles
+
+        self.start_tab = self.marionette.current_window_handle
+        self.start_tabs = self.marionette.window_handles
+
+    def tearDown(self):
+        if len(self.marionette.chrome_window_handles) > len(self.start_windows):
+            raise Exception("Not all windows as opened by the test have been closed")
+
+        if len(self.marionette.window_handles) > len(self.start_tabs):
+            raise Exception("Not all tabs as opened by the test have been closed")
+
+        super(WindowManagerMixin, self).tearDown()
+
+    def close_all_tabs(self):
+        current_window_handles = self.marionette.window_handles
+
+        # If the start tab is not present anymore, use the next one of the list
+        if self.start_tab not in current_window_handles:
+            self.start_tab = current_window_handles[0]
+
+        current_window_handles.remove(self.start_tab)
+        for handle in current_window_handles:
+            self.marionette.switch_to_window(handle)
+            self.marionette.close()
+
+        self.marionette.switch_to_window(self.start_tab)
+
+    def close_all_windows(self):
+        current_chrome_window_handles = self.marionette.chrome_window_handles
+
+        # If the start window is not present anymore, use the next one of the list
+        if self.start_window not in current_chrome_window_handles:
+            self.start_window = current_chrome_window_handles[0]
+        current_chrome_window_handles.remove(self.start_window)
+
+        for handle in current_chrome_window_handles:
+            self.marionette.switch_to_window(handle)
+            self.marionette.close_chrome_window()
+
+        self.marionette.switch_to_window(self.start_window)
+
+    def open_tab(self, callback=None, focus=False):
+        current_tabs = self.marionette.window_handles
+
+        try:
+            if callable(callback):
+                callback()
+            else:
+                result = self.marionette.open(type="tab", focus=focus)
+                if result["type"] != "tab":
+                    raise Exception(
+                        "Newly opened browsing context is of type {} and not tab.".format(
+                            result["type"]
+                        )
+                    )
+        except Exception:
+            exc_cls, exc, tb = sys.exc_info()
+            reraise(
+                exc_cls,
+                exc_cls("Failed to trigger opening a new tab: {}".format(exc)),
+                tb,
+            )
+        else:
+            Wait(self.marionette).until(
+                lambda mn: len(mn.window_handles) == len(current_tabs) + 1,
+                message="No new tab has been opened",
+            )
+
+            [new_tab] = list(set(self.marionette.window_handles) - set(current_tabs))
+
+            return new_tab
+
+    def open_window(self, callback=None, focus=False, private=False):
+        current_windows = self.marionette.chrome_window_handles
+        current_tabs = self.marionette.window_handles
+
+        def loaded(handle):
+            with self.marionette.using_context("chrome"):
+                return self.marionette.execute_script(
+                    """
+                  const { windowManager } = ChromeUtils.importESModule(
+                    "chrome://remote/content/shared/WindowManager.sys.mjs"
+                  );
+                  const win = windowManager.findWindowByHandle(arguments[0]).win;
+                  return win.document.readyState == "complete";
+                """,
+                    script_args=[handle],
+                )
+
+        try:
+            if callable(callback):
+                callback(focus)
+            else:
+                result = self.marionette.open(
+                    type="window", focus=focus, private=private
+                )
+                if result["type"] != "window":
+                    raise Exception(
+                        "Newly opened browsing context is of type {} and not window.".format(
+                            result["type"]
+                        )
+                    )
+        except Exception:
+            exc_cls, exc, tb = sys.exc_info()
+            reraise(
+                exc_cls,
+                exc_cls("Failed to trigger opening a new window: {}".format(exc)),
+                tb,
+            )
+        else:
+            Wait(self.marionette).until(
+                lambda mn: len(mn.chrome_window_handles) == len(current_windows) + 1,
+                message="No new window has been opened",
+            )
+
+            [new_window] = list(
+                set(self.marionette.chrome_window_handles) - set(current_windows)
+            )
+
+            # Before continuing ensure the window has been completed loading
+            Wait(self.marionette).until(
+                lambda _: loaded(new_window),
+                message="Window with handle '{}'' did not finish loading".format(
+                    new_window
+                ),
+            )
+
+            # Bug 1507771 - Return the correct handle based on the currently selected context
+            # as long as "WebDriver:NewWindow" is not handled separtely in chrome context
+            context = self.marionette._send_message(
+                "Marionette:GetContext", key="value"
+            )
+            if context == "chrome":
+                return new_window
+            elif context == "content":
+                [new_tab] = list(
+                    set(self.marionette.window_handles) - set(current_tabs)
+                )
+                return new_tab
+
+    def open_chrome_window(self, url, focus=False):
+        """Open a new chrome window with the specified chrome URL.
+
+        Can be replaced with "WebDriver:NewWindow" once the command
+        supports opening generic chrome windows beside browsers (bug 1507771).
+        """
+
+        def open_with_js(focus):
+            with self.marionette.using_context("chrome"):
+                self.marionette.execute_async_script(
+                    """
+                  let [url, focus, resolve] = arguments;
+
+                  function waitForEvent(target, type, args) {
+                    return new Promise(resolve => {
+                      let params = Object.assign({once: true}, args);
+                      target.addEventListener(type, event => {
+                        dump(`** Received DOM event ${event.type} for ${event.target}\n`);
+                        resolve();
+                      }, params);
+                    });
+                  }
+
+                  function waitForFocus(win) {
+                    return Promise.all([
+                      waitForEvent(win, "activate"),
+                      waitForEvent(win, "focus", {capture: true}),
+                    ]);
+                  }
+
+                  (async function() {
+                    // Open a window, wait for it to receive focus
+                    let win = window.openDialog(url, null, "chrome,centerscreen");
+                    let focused = waitForFocus(win);
+
+                    win.focus();
+                    await focused;
+
+                    // The new window shouldn't get focused. As such set the
+                    // focus back to the opening window.
+                    if (!focus && Services.focus.activeWindow != window) {
+                      let focused = waitForFocus(window);
+                      window.focus();
+                      await focused;
+                    }
+
+                    resolve(win.docShell.browsingContext.id);
+                  })();
+                """,
+                    script_args=(url, focus),
+                )
+
+        with self.marionette.using_context("chrome"):
+            return self.open_window(callback=open_with_js, focus=focus)
diff --git a/testing/marionette/harness/marionette_harness/runner/serve.py b/testing/marionette/harness/marionette_harness/runner/serve.py
new file mode 100755
index 0000000000..3833bbe876
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/runner/serve.py
@@ -0,0 +1,239 @@
+#!/usr/bin/env python
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+"""Spawns necessary HTTP servers for testing Marionette in child
+processes.
+
+"""
+
+import argparse
+import multiprocessing
+import os
+import sys
+from collections import defaultdict
+
+from six import iteritems
+
+from . import httpd
+
+__all__ = [
+    "default_doc_root",
+    "iter_proc",
+    "iter_url",
+    "registered_servers",
+    "servers",
+    "start",
+    "where_is",
+]
+here = os.path.abspath(os.path.dirname(__file__))
+
+
+class BlockingChannel(object):
+    def __init__(self, channel):
+        self.chan = channel
+        self.lock = multiprocessing.Lock()
+
+    def call(self, func, args=()):
+        self.send((func, args))
+        return self.recv()
+
+    def send(self, *args):
+        try:
+            self.lock.acquire()
+            self.chan.send(args)
+        finally:
+            self.lock.release()
+
+    def recv(self):
+        try:
+            self.lock.acquire()
+            payload = self.chan.recv()
+            if isinstance(payload, tuple) and len(payload) == 1:
+                return payload[0]
+            return payload
+        except KeyboardInterrupt:
+            return ("stop", ())
+        finally:
+            self.lock.release()
+
+
+class ServerProxy(multiprocessing.Process, BlockingChannel):
+    def __init__(self, channel, init_func, *init_args, **init_kwargs):
+        multiprocessing.Process.__init__(self)
+        BlockingChannel.__init__(self, channel)
+        self.init_func = init_func
+        self.init_args = init_args
+        self.init_kwargs = init_kwargs
+
+    def run(self):
+        try:
+            server = self.init_func(*self.init_args, **self.init_kwargs)
+            server.start()
+            self.send(("ok", ()))
+
+            while True:
+                # ["func", ("arg", ...)]
+                # ["prop", ()]
+                sattr, fargs = self.recv()
+                attr = getattr(server, sattr)
+
+                # apply fargs to attr if it is a function
+                if callable(attr):
+                    rv = attr(*fargs)
+
+                # otherwise attr is a property
+                else:
+                    rv = attr
+
+                self.send(rv)
+
+                if sattr == "stop":
+                    return
+
+        except Exception as e:
+            self.send(("stop", e))
+
+        except KeyboardInterrupt:
+            server.stop()
+
+
+class ServerProc(BlockingChannel):
+    def __init__(self, init_func):
+        self._init_func = init_func
+        self.proc = None
+
+        parent_chan, self.child_chan = multiprocessing.Pipe()
+        BlockingChannel.__init__(self, parent_chan)
+
+    def start(self, doc_root, ssl_config, **kwargs):
+        self.proc = ServerProxy(
+            self.child_chan, self._init_func, doc_root, ssl_config, **kwargs
+        )
+        self.proc.daemon = True
+        self.proc.start()
+
+        res, exc = self.recv()
+        if res == "stop":
+            raise exc
+
+    def get_url(self, url):
+        return self.call("get_url", (url,))
+
+    @property
+    def doc_root(self):
+        return self.call("doc_root", ())
+
+    def stop(self):
+        self.call("stop")
+        if not self.is_alive:
+            return
+        self.proc.join()
+
+    def kill(self):
+        if not self.is_alive:
+            return
+        self.proc.terminate()
+        self.proc.join(0)
+
+    @property
+    def is_alive(self):
+        if self.proc is not None:
+            return self.proc.is_alive()
+        return False
+
+
+def http_server(doc_root, ssl_config, host="127.0.0.1", **kwargs):
+    return httpd.FixtureServer(doc_root, url="http://{}:0/".format(host), **kwargs)
+
+
+def https_server(doc_root, ssl_config, host="127.0.0.1", **kwargs):
+    return httpd.FixtureServer(
+        doc_root,
+        url="https://{}:0/".format(host),
+        ssl_key=ssl_config["key_path"],
+        ssl_cert=ssl_config["cert_path"],
+        **kwargs
+    )
+
+
+def start_servers(doc_root, ssl_config, **kwargs):
+    servers = defaultdict()
+    for schema, builder_fn in registered_servers:
+        proc = ServerProc(builder_fn)
+        proc.start(doc_root, ssl_config, **kwargs)
+        servers[schema] = (proc.get_url("/"), proc)
+    return servers
+
+
+def start(doc_root=None, **kwargs):
+    """Start all relevant test servers.
+
+    If no `doc_root` is given the default
+    testing/marionette/harness/marionette_harness/www directory will be used.
+
+    Additional keyword arguments can be given which will be passed on
+    to the individual ``FixtureServer``'s in httpd.py.
+
+    """
+    doc_root = doc_root or default_doc_root
+    ssl_config = {
+        "cert_path": httpd.default_ssl_cert,
+        "key_path": httpd.default_ssl_key,
+    }
+
+    global servers
+    servers = start_servers(doc_root, ssl_config, **kwargs)
+    return servers
+
+
+def where_is(uri, on="http"):
+    """Returns the full URL, including scheme, hostname, and port, for
+    a fixture resource from the server associated with the ``on`` key.
+    It will by default look for the resource in the "http" server.
+
+    """
+    return servers.get(on)[1].get_url(uri)
+
+
+def iter_proc(servers):
+    for _, (_, proc) in iteritems(servers):
+        yield proc
+
+
+def iter_url(servers):
+    for _, (url, _) in iteritems(servers):
+        yield url
+
+
+default_doc_root = os.path.join(os.path.dirname(here), "www")
+registered_servers = [("http", http_server), ("https", https_server)]
+servers = defaultdict()
+
+
+def main(args):
+    global servers
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "-r", dest="doc_root", help="Path to document root.  Overrides default."
+    )
+    args = parser.parse_args()
+
+    servers = start(args.doc_root)
+    for url in iter_url(servers):
+        print("{}: listening on {}".format(sys.argv[0], url), file=sys.stderr)
+
+    try:
+        while any(proc.is_alive for proc in iter_proc(servers)):
+            for proc in iter_proc(servers):
+                proc.proc.join(1)
+    except KeyboardInterrupt:
+        for proc in iter_proc(servers):
+            proc.kill()
+
+
+if __name__ == "__main__":
+    main(sys.argv[1:])