Add coverage analysis to push and merge script tests.

The coverage analysis must live in an extra file in order to analyze the scripts when being imported.

TEST=tools/push-to-trunk/script_test.py
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/183923013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19640 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/push-to-trunk/script_test.py

+#!/usr/bin/env python
+# Copyright 2014 the V8 project authors. 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.
+
+# Wraps test execution with a coverage analysis. To get the best speed, the
+# native python coverage version >= 3.7.1 should be installed.
+
+import coverage
+import os
+import unittest
+import sys
+
+
+def Main(argv):
+  script_path = os.path.dirname(os.path.abspath(__file__))
+  cov = coverage.coverage(include=([os.path.join(script_path, '*.py')]))
+  cov.start()
+  import test_scripts
+  alltests = map(unittest.TestLoader().loadTestsFromTestCase, [
+    test_scripts.ToplevelTest,
+    test_scripts.ScriptTest,
+    test_scripts.SystemTest,
+  ])
+  unittest.TextTestRunner(verbosity=2).run(unittest.TestSuite(alltests))
+  cov.stop()
+  print cov.report()
+
+
+if __name__ == '__main__':
+  sys.exit(Main(sys.argv))

tools/push-to-trunk/test_scripts.py

@@ -238,7 +238,7 @@ class SimpleMock(object):
   def Expect(self, recipe):
     self._recipe = recipe
 
-  def Call(self, *args):
+  def Call(self, *args):  # pragma: no cover
     self._index += 1
     try:
       expected_call = self._recipe[self._index]
@@ -276,7 +276,7 @@ class SimpleMock(object):
       raise return_value
     return return_value
 
-  def AssertFinished(self):
+  def AssertFinished(self):  # pragma: no cover
     if self._index < len(self._recipe) -1:
       raise NoRetryException("Called %s too seldom: %d vs. %d"
                              % (self._name, self._index, len(self._recipe)))