Initial push.
diff --git a/tools/test.py b/tools/test.py
new file mode 100755
index 0000000..2f5baf8
--- /dev/null
+++ b/tools/test.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+# Copyright (c) 2016, the R8 project authors. Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# Convenience script for running tests. If no argument is given run all tests,
+# if an argument is given, run only tests with that pattern. This script will
+# force the tests to run, even if no input changed.
+
+import gradle
+import optparse
+import sys
+
+ALL_ART_VMS = ["default", "7.0.0", "6.0.1", "5.1.1"]
+
+def ParseOptions():
+  result = optparse.OptionParser()
+  result.add_option('--no_internal',
+      help='Do not run Google internal tests.',
+      default=False, action='store_true')
+  result.add_option('--only_internal',
+      help='Only run Google internal tests.',
+      default=False, action='store_true')
+  result.add_option('--all_tests',
+      help='Run tests in all configurations.',
+      default=False, action='store_true')
+  result.add_option('-v', '--verbose',
+      help='Print test stdout to, well, stdout.',
+      default=False, action='store_true')
+  result.add_option('--dex_vm',
+      help='The android version of the vm to use. "all" will run the tests on '
+           'all art vm versions (stopping after first failed execution)',
+      default="default",
+      choices=ALL_ART_VMS + ["all"])
+  result.add_option('--one_line_per_test',
+      help='Print a line before a tests starts and after it ends to stdout.',
+      default=False, action='store_true')
+  result.add_option('--tool',
+      help='Tool to run ART tests with: "r8" (default) or "d8". Ignored if "--all_tests" enabled.',
+      default=None, choices=["r8", "d8"])
+  result.add_option('--jctf',
+      help='Run JCTF tests with: "r8" (default) or "d8".',
+      default=False, action='store_true')
+  result.add_option('--only_jctf',
+      help='Run only JCTF tests with: "r8" (default) or "d8".',
+      default=False, action='store_true')
+  result.add_option('--jctf_compile_only',
+      help="Don't run, only compile JCTF tests.",
+      default=False, action='store_true')
+
+  return result.parse_args()
+
+def Main():
+  (options, args) = ParseOptions()
+  gradle_args = ['cleanTest', 'test']
+  if len(args) > 1:
+    print("test.py takes at most one argument, the pattern for tests to run")
+    return -1
+  if options.verbose:
+    gradle_args.append('-Pprint_test_stdout')
+  if options.no_internal:
+    gradle_args.append('-Pno_internal')
+  if options.only_internal:
+    gradle_args.append('-Ponly_internal')
+  if options.all_tests:
+    gradle_args.append('-Pall_tests')
+  if options.tool:
+    gradle_args.append('-Ptool=%s' % options.tool)
+  if options.one_line_per_test:
+    gradle_args.append('-Pone_line_per_test')
+  if options.jctf:
+    gradle_args.append('-Pjctf')
+  if options.only_jctf:
+    gradle_args.append('-Ponly_jctf')
+  if options.jctf_compile_only:
+    gradle_args.append('-Pjctf_compile_only')
+  if len(args) > 0:
+    gradle_args.append('--tests')
+    gradle_args.append(args[0])
+
+  vms_to_test = [options.dex_vm] if options.dex_vm != "all" else ALL_ART_VMS
+  for art_vm in vms_to_test:
+    gradle.RunGradle(gradle_args + ['-Pdex_vm=%s' % art_vm])
+
+if __name__ == '__main__':
+  sys.exit(Main())
+
+