Add everything from src/tools/isolate r159537.

tests/trace_test_cases_smoke_test.py

Index: tests/trace_test_cases_smoke_test.py
diff --git a/tests/trace_test_cases_smoke_test.py b/tests/trace_test_cases_smoke_test.py
new file mode 100755
index 0000000000000000000000000000000000000000..d3de10673362b90611cdd386e7aad59f199cc0a1
--- /dev/null
+++ b/tests/trace_test_cases_smoke_test.py
@@ -0,0 +1,123 @@
+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+import json
+import logging
+import os
+import re
+import subprocess
+import sys
+import tempfile
+import unittest
+
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+ROOT_DIR = os.path.dirname(BASE_DIR)
+sys.path.insert(0, ROOT_DIR)
+
+import trace_inputs
+
+FILE_PATH = os.path.realpath(unicode(os.path.abspath(__file__)))
+TARGET_UTIL_PATH = os.path.join(BASE_DIR, 'gtest_fake', 'gtest_fake_base.py')
+TARGET_PATH = os.path.join(BASE_DIR, 'gtest_fake', 'gtest_fake_fail.py')
+
+
+class TraceTestCases(unittest.TestCase):
+  def setUp(self):
+    self.temp_file = None
+
+    self.initial_cwd = ROOT_DIR
+    if sys.platform == 'win32':
+      # Windows has no kernel mode concept of current working directory.
+      self.initial_cwd = None
+
+    # There's 2 kinds of references to python, self.executable,
+    # self.real_executable. It depends how python was started and on which OS.
+    self.executable = unicode(sys.executable)
+    if sys.platform == 'darwin':
+      # /usr/bin/python is a thunk executable that decides which version of
+      # python gets executed.
+      suffix = '.'.join(map(str, sys.version_info[0:2]))
+      if os.access(self.executable + suffix, os.X_OK):
+        # So it'll look like /usr/bin/python2.7
+        self.executable += suffix
+
+    self.real_executable = trace_inputs.get_native_path_case(self.executable)
+    # Make sure there's no environment variable that could do side effects.
+    os.environ.pop('GTEST_SHARD_INDEX', '')
+    os.environ.pop('GTEST_TOTAL_SHARDS', '')
+
+  def tearDown(self):
+    if self.temp_file:
+      os.remove(self.temp_file)
+
+  def test_simple(self):
+    file_handle, self.temp_file = tempfile.mkstemp(
+        prefix='trace_test_cases_test')
+    os.close(file_handle)
+
+    cmd = [
+        sys.executable,
+        os.path.join(ROOT_DIR, 'trace_test_cases.py'),
+        # Forces 4 parallel jobs.
+        '--jobs', '4',
+        '--timeout', '0',
+        '--out', self.temp_file,
+    ]
+    if VERBOSE:
+      cmd.extend(['-v'] * 3)
+    cmd.append(TARGET_PATH)
+    logging.debug(' '.join(cmd))
+    proc = subprocess.Popen(
+        cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, err = proc.communicate() or ('', '')  # pylint is confused.
+    self.assertEquals(0, proc.returncode, (out, err))
+    lines = out.splitlines()
+    expected_out_re = [
+      r'\[1/4\]   \d\.\d\ds .+',
+      r'\[2/4\]   \d\.\d\ds .+',
+      r'\[3/4\]   \d\.\d\ds .+',
+      r'\[4/4\]   \d\.\d\ds .+',
+    ]
+    self.assertEquals(len(expected_out_re), len(lines), lines)
+    for index in range(len(expected_out_re)):
+      self.assertTrue(
+          re.match('^%s$' % expected_out_re[index], lines[index]),
+          '%d: %s\n%r\n%s' % (
+            index, expected_out_re[index], lines[index], out))
+    # Junk is printed on win32.
+    if sys.platform != 'win32' and not VERBOSE:
+      self.assertEquals('', err)
+
+    with open(self.temp_file, 'r') as f:
+      content = f.read()
+      try:
+        result = json.loads(content)
+      except:
+        print repr(content)
+        raise
+
+    test_cases = (
+      'Baz.Fail',
+      'Foo.Bar1',
+      'Foo.Bar2',
+      'Foo.Bar3',
+    )
+    self.assertEquals(dict, result.__class__)
+    self.assertEquals(['traces'], result.keys())
+    for index, trace in enumerate(
+        sorted(result['traces'], key=lambda x: x['trace'])):
+      self.assertEquals(test_cases[index], trace['trace'])
+      self.assertEquals(
+          [u'cmd', u'cwd', u'output', u'pid', u'trace'], sorted(trace))
+      self.assertEquals(
+          [sys.executable, TARGET_PATH, '--gtest_filter=%s' % trace['trace']],
+          trace['cmd'])
+      self.assertEquals(int, trace['pid'].__class__)
+
+
+if __name__ == '__main__':
+  VERBOSE = '-v' in sys.argv
+  logging.basicConfig(level=logging.DEBUG if VERBOSE else logging.ERROR)
+  unittest.main()