Add support for IsApplicationRunning on Mac.

PosixPlatformBackend didn't have support for detecting if an app is
running.

BUG=None

Review URL: https://codereview.chromium.org/331843007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278524 0039d316-1c4b-4281-b951-d872f2087c98

tools/telemetry/telemetry/core/platform/__init__.py

@@ -133,7 +133,7 @@ class Platform(object):
 
   def IsApplicationRunning(self, application):
     """Returns whether an application is currently running."""
-    return self._platform_backend.IsApplicationLaunchning(application)
+    return self._platform_backend.IsApplicationRunning(application)
 
   def CanLaunchApplication(self, application):
     """Returns whether the platform can launch the given application."""

tools/telemetry/telemetry/core/platform/posix_platform_backend.py

@@ -31,7 +31,7 @@ class PosixPlatformBackend(desktop_platform_backend.DesktopPlatformBackend):
 
     Args:
       columns: A list of require columns, e.g., ['pid', 'pss'].
-      pid: If nont None, returns only the information of the process
+      pid: If not None, returns only the information of the process
          with the pid.
     """
     args = ['ps']
@@ -71,6 +71,12 @@ class PosixPlatformBackend(desktop_platform_backend.DesktopPlatformBackend):
   def CanLaunchApplication(self, application):
     return bool(distutils.spawn.find_executable(application))
 
+  def IsApplicationRunning(self, application):
+    ps_output = self._GetPsOutput(['command'])
+    application_re = re.compile(
+        '(.*%s|^)%s(\s|$)' % (os.path.sep, application))
+    return any(application_re.match(cmd) for cmd in ps_output)
+
   def LaunchApplication(
       self, application, parameters=None, elevate_privilege=False):
     assert application, 'Must specify application to launch'

tools/telemetry/telemetry/core/platform/posix_platform_backend_unittest.py

 # Copyright 2013 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 os
+import sys
 import unittest
 
+from telemetry import test
+from telemetry.core.platform import factory
 from telemetry.core.platform import posix_platform_backend
 
 
@@ -46,3 +50,13 @@ class PosixPlatformBackendTest(unittest.TestCase):
     backend.SetMockPsOutput(['  1 0 S  ', '  2 1', '3 2 '])
     result = backend.GetChildPids(1)
     self.assertEquals(set(result), set([2, 3]))
+
+  @test.Enabled('linux', 'mac')
+  def testIsApplicationRunning(self):
+    backend = factory.GetPlatformBackendForCurrentOS()
+
+    self.assertFalse(backend.IsApplicationRunning('This_Is_A_Bad___App__Name'))
+    sys_exe = os.path.basename(sys.executable)
+    self.assertTrue(backend.IsApplicationRunning(sys_exe))
+    self.assertFalse(
+        backend.IsApplicationRunning('%s append_bad_after_space' % sys_exe))