Telemetry: Linux-based backends should return CPU results in seconds, not jiffies.

tools/telemetry/telemetry/core/platform/linux_based_platform_backend_unittest.py

Index: tools/telemetry/telemetry/core/platform/linux_based_platform_backend_unittest.py
diff --git a/tools/telemetry/telemetry/core/platform/linux_based_platform_backend_unittest.py b/tools/telemetry/telemetry/core/platform/linux_based_platform_backend_unittest.py
index dfadac3d31b596646c3dcf939306d4fa908e866f..5fadde7c401978e2fb21f6d7e71b785ae4133bac 100644
--- a/tools/telemetry/telemetry/core/platform/linux_based_platform_backend_unittest.py
+++ b/tools/telemetry/telemetry/core/platform/linux_based_platform_backend_unittest.py
@@ -23,9 +23,33 @@ class TestBackend(linux_based_platform_backend.LinuxBasedPlatformBackend):
   def GetFileContents(self, filename):
     return self._mock_files[filename]
 
+  def GetClockTicks(self):
+    return 41
 
 class LinuxBasedPlatformBackendTest(unittest.TestCase):
 
+  def testGetCpuStatsBasic(self):
+    if not linux_based_platform_backend.resource:
+      logging.warning('Test not supported')
+      return
+
+    backend = TestBackend()
+    with open(os.path.join(util.GetUnittestDataDir(), 'stat')) as f:
+      backend.SetMockFile('/proc/1/stat', f.read())

[jeremy, 2014/10/29 06:11:32]

IMHO it might be a bit cleaner if you split these 2 lines into a function?

[Lei Zhang, 2014/10/29 07:03:08]

Done. Can you take a look again to make sure I did what I think you asked?

+    result = backend.GetCpuStats(1)
+    self.assertEquals(result, {'CpuProcessTime': 22.0})
+
+  def testGetCpuTimestampBasic(self):
+    if not linux_based_platform_backend.resource:
+      logging.warning('Test not supported')
+      return
+
+    backend = TestBackend()
+    with open(os.path.join(util.GetUnittestDataDir(), 'timer_list')) as f:
+      backend.SetMockFile('/proc/timer_list', f.read())
+    result = backend.GetCpuTimestamp()
+    self.assertEquals(result, {'TotalTime': 105054633.0})
+
   def testGetMemoryStatsBasic(self):
     if not linux_based_platform_backend.resource:
       logging.warning('Test not supported')