Update from https://crrev.com/315085

build/android/pylib/device/logcat_monitor_test.py

Index: build/android/pylib/device/logcat_monitor_test.py
diff --git a/build/android/pylib/device/logcat_monitor_test.py b/build/android/pylib/device/logcat_monitor_test.py
new file mode 100755
index 0000000000000000000000000000000000000000..7a6bf56d5001b1b2ea7c16acacf1325e10addba1
--- /dev/null
+++ b/build/android/pylib/device/logcat_monitor_test.py
@@ -0,0 +1,164 @@
+#!/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.
+
+import itertools
+import os
+import sys
+import unittest
+
+from pylib import constants
+from pylib.device import adb_wrapper
+from pylib.device import decorators
+from pylib.device import logcat_monitor
+
+sys.path.append(os.path.join(
+    constants.DIR_SOURCE_ROOT, 'third_party', 'pymock'))
+import mock # pylint: disable=F0401
+
+
+class LogcatMonitorTest(unittest.TestCase):
+
+  _TEST_THREADTIME_LOGCAT_DATA = [
+        '01-01 01:02:03.456  7890  0987 V LogcatMonitorTest: '
+            'verbose logcat monitor test message 1',
+        '01-01 01:02:03.457  8901  1098 D LogcatMonitorTest: '
+            'debug logcat monitor test message 2',
+        '01-01 01:02:03.458  9012  2109 I LogcatMonitorTest: '
+            'info logcat monitor test message 3',
+        '01-01 01:02:03.459  0123  3210 W LogcatMonitorTest: '
+            'warning logcat monitor test message 4',
+        '01-01 01:02:03.460  1234  4321 E LogcatMonitorTest: '
+            'error logcat monitor test message 5',
+        '01-01 01:02:03.461  2345  5432 F LogcatMonitorTest: '
+            'fatal logcat monitor test message 6',
+        '01-01 01:02:03.462  3456  6543 D LogcatMonitorTest: '
+            'ignore me',]
+
+  def _createTestLog(self, raw_logcat=None):
+    test_adb = adb_wrapper.AdbWrapper('0123456789abcdef')
+    test_adb.Logcat = mock.Mock(return_value=(l for l in raw_logcat))
+    test_log = logcat_monitor.LogcatMonitor(test_adb, clear=False)
+    return test_log
+
+  def assertIterEqual(self, expected_iter, actual_iter):
+    for expected, actual in itertools.izip_longest(expected_iter, actual_iter):
+      self.assertIsNotNone(
+          expected,
+          msg='actual has unexpected elements starting with %s' % str(actual))
+      self.assertIsNotNone(
+          actual,
+          msg='actual is missing elements starting with %s' % str(expected))
+      self.assertEqual(actual.proc_id, expected[0])
+      self.assertEqual(actual.thread_id, expected[1])
+      self.assertEqual(actual.log_level, expected[2])
+      self.assertEqual(actual.component, expected[3])
+      self.assertEqual(actual.message, expected[4])
+
+    with self.assertRaises(StopIteration):
+      next(actual_iter)
+    with self.assertRaises(StopIteration):
+      next(expected_iter)
+
+  def testWaitFor_success(self):
+    test_log = self._createTestLog(
+        raw_logcat=type(self)._TEST_THREADTIME_LOGCAT_DATA)
+    actual_match = test_log.WaitFor(r'.*(fatal|error) logcat monitor.*', None)
+    self.assertTrue(actual_match)
+    self.assertEqual(
+        '01-01 01:02:03.460  1234  4321 E LogcatMonitorTest: '
+            'error logcat monitor test message 5',
+        actual_match.group(0))
+    self.assertEqual('error', actual_match.group(1))
+
+  def testWaitFor_failure(self):
+    test_log = self._createTestLog(
+        raw_logcat=type(self)._TEST_THREADTIME_LOGCAT_DATA)
+    actual_match = test_log.WaitFor(
+        r'.*My Success Regex.*', r'.*(fatal|error) logcat monitor.*')
+    self.assertIsNone(actual_match)
+
+  def testFindAll_defaults(self):
+    test_log = self._createTestLog(
+        raw_logcat=type(self)._TEST_THREADTIME_LOGCAT_DATA)
+    expected_results = [
+        ('7890', '0987', 'V', 'LogcatMonitorTest',
+         'verbose logcat monitor test message 1'),
+        ('8901', '1098', 'D', 'LogcatMonitorTest',
+         'debug logcat monitor test message 2'),
+        ('9012', '2109', 'I', 'LogcatMonitorTest',
+         'info logcat monitor test message 3'),
+        ('0123', '3210', 'W', 'LogcatMonitorTest',
+         'warning logcat monitor test message 4'),
+        ('1234', '4321', 'E', 'LogcatMonitorTest',
+         'error logcat monitor test message 5'),
+        ('2345', '5432', 'F', 'LogcatMonitorTest',
+         'fatal logcat monitor test message 6')]
+    actual_results = test_log.FindAll(r'\S* logcat monitor test message \d')
+    self.assertIterEqual(iter(expected_results), actual_results)
+
+  def testFindAll_defaults_miss(self):
+    test_log = self._createTestLog(
+        raw_logcat=type(self)._TEST_THREADTIME_LOGCAT_DATA)
+    expected_results = []
+    actual_results = test_log.FindAll(r'\S* nothing should match this \d')
+    self.assertIterEqual(iter(expected_results), actual_results)
+
+  def testFindAll_filterProcId(self):
+    test_log = self._createTestLog(
+        raw_logcat=type(self)._TEST_THREADTIME_LOGCAT_DATA)
+    actual_results = test_log.FindAll(
+        r'\S* logcat monitor test message \d', proc_id=1234)
+    expected_results = [
+        ('1234', '4321', 'E', 'LogcatMonitorTest',
+         'error logcat monitor test message 5')]
+    self.assertIterEqual(iter(expected_results), actual_results)
+
+  def testFindAll_filterThreadId(self):
+    test_log = self._createTestLog(
+        raw_logcat=type(self)._TEST_THREADTIME_LOGCAT_DATA)
+    actual_results = test_log.FindAll(
+        r'\S* logcat monitor test message \d', thread_id=2109)
+    expected_results = [
+        ('9012', '2109', 'I', 'LogcatMonitorTest',
+         'info logcat monitor test message 3')]
+    self.assertIterEqual(iter(expected_results), actual_results)
+
+  def testFindAll_filterLogLevel(self):
+    test_log = self._createTestLog(
+        raw_logcat=type(self)._TEST_THREADTIME_LOGCAT_DATA)
+    actual_results = test_log.FindAll(
+        r'\S* logcat monitor test message \d', log_level=r'[DW]')
+    expected_results = [
+        ('8901', '1098', 'D', 'LogcatMonitorTest',
+         'debug logcat monitor test message 2'),
+        ('0123', '3210', 'W', 'LogcatMonitorTest',
+         'warning logcat monitor test message 4'),]
+    self.assertIterEqual(iter(expected_results), actual_results)
+
+  def testFindAll_filterComponent(self):
+    test_log = self._createTestLog(
+        raw_logcat=type(self)._TEST_THREADTIME_LOGCAT_DATA)
+    actual_results = test_log.FindAll(r'.*', component='LogcatMonitorTest')
+    expected_results = [
+        ('7890', '0987', 'V', 'LogcatMonitorTest',
+         'verbose logcat monitor test message 1'),
+        ('8901', '1098', 'D', 'LogcatMonitorTest',
+         'debug logcat monitor test message 2'),
+        ('9012', '2109', 'I', 'LogcatMonitorTest',
+         'info logcat monitor test message 3'),
+        ('0123', '3210', 'W', 'LogcatMonitorTest',
+         'warning logcat monitor test message 4'),
+        ('1234', '4321', 'E', 'LogcatMonitorTest',
+         'error logcat monitor test message 5'),
+        ('2345', '5432', 'F', 'LogcatMonitorTest',
+         'fatal logcat monitor test message 6'),
+        ('3456', '6543', 'D', 'LogcatMonitorTest',
+         'ignore me'),]
+    self.assertIterEqual(iter(expected_results), actual_results)
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)
+