diff -r 000000000000 -r 4f2f89ce4247 WebKitTools/Scripts/webkitpy/tool/steps/runtests.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKitTools/Scripts/webkitpy/tool/steps/runtests.py	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,69 @@
+# Copyright (C) 2010 Google Inc. All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+# 
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from webkitpy.tool.steps.abstractstep import AbstractStep
+from webkitpy.tool.steps.options import Options
+from webkitpy.common.system.deprecated_logging import log
+
+class RunTests(AbstractStep):
+    @classmethod
+    def options(cls):
+        return AbstractStep.options() + [
+            Options.test,
+            Options.non_interactive,
+            Options.quiet,
+            Options.port,
+        ]
+
+    def run(self, state):
+        if not self._options.test:
+            return
+
+        # Run the scripting unit tests first because they're quickest.
+        log("Running Python unit tests")
+        self._tool.executive.run_and_throw_if_fail(self.port().run_python_unittests_command())
+        log("Running Perl unit tests")
+        self._tool.executive.run_and_throw_if_fail(self.port().run_perl_unittests_command())
+        log("Running JavaScriptCore tests")
+        self._tool.executive.run_and_throw_if_fail(self.port().run_javascriptcore_tests_command(), quiet=True)
+
+        log("Running run-webkit-tests")
+        args = self.port().run_webkit_tests_command()
+        if self._options.non_interactive:
+            args.append("--no-launch-safari")
+            args.append("--exit-after-n-failures=1")
+            # FIXME: Hack to work around https://bugs.webkit.org/show_bug.cgi?id=38912
+            # when running the commit-queue on a mac leopard machine since compositing
+            # does not work reliably on Leopard due to various graphics driver/system bugs.
+            if self.port().name() == "Mac" and self.port().is_leopard():
+                args.extend(["--ignore-tests", "compositing"])
+
+        if self._options.quiet:
+            args.append("--quiet")
+        self._tool.executive.run_and_throw_if_fail(args)
+