Adds the ability to run pure Go unit tests in the Mojo test suite.

mojo/tools/run_pure_go_tests.py

Index: mojo/tools/run_pure_go_tests.py
diff --git a/mojo/tools/run_pure_go_tests.py b/mojo/tools/run_pure_go_tests.py
new file mode 100755
index 0000000000000000000000000000000000000000..1b78bdb339c71931163f6fb4808090d3c65f1286
--- /dev/null
+++ b/mojo/tools/run_pure_go_tests.py
@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Runs pure Go tests in the Mojo source tree from a list of directories
+specified in a data file."""
+
+
+import argparse
+import os
+import subprocess
+import sys
+
+from mopy.invoke_go import InvokeGo
+from mopy.paths import Paths
+
+
+def main():
+  parser = argparse.ArgumentParser(description="Runs pure Go tests in the "
+      "Mojo source tree from a list of directories specified in a data file.")
+  parser.add_argument('go_tool_path', metavar='go-tool-path',
+      help="the path to the 'go' binary")
+  parser.add_argument("test_list_file", type=file, metavar='test-list-file',
+                      help="a file listing directories containing go tests "
+                      "to run")
+  args = parser.parse_args()
+  go_tool = args.go_tool_path
+
+  # Execute the Python script specified in args.test_list_file.
+  # This will populate a list of Go directories.
+  test_list_globals = {}
+  exec args.test_list_file in test_list_globals
+  test_dirs = test_list_globals["test_dirs"]
+
+  src_root = Paths().src_root
+  assert os.path.isabs(src_root)
+  # |test_dirs| is a list of "/"-delimited, |src_root|-relative, paths
+  # of directories containing a Go package.
+  for path in test_dirs:
+    test_dir = os.path.join(src_root, *path.split('/'))
+    os.chdir(test_dir)
+    print "Running Go tests in %s..." % test_dir
+    call_result = InvokeGo(go_tool, ["test"])
+    if call_result:
+      return call_result
+
+if __name__ == '__main__':
+  sys.exit(main())