add linux specifc test for cpu_count()

2 files changed, 8 insertions, 2 deletions

diff --git a/IDEAS b/IDEAS
index 015b5fff..247b8b38 100644
--- a/IDEAS
+++ b/IDEAS
@@ -79,8 +79,6 @@ FEATURES
 - Number of system threads.
   - Windows: http://msdn.microsoft.com/en-us/library/windows/desktop/ms684824(v=vs.85).aspx
 
-- #357: what CPU a process is on.
-
 - Doc / wiki which compares similarities between UNIX cli tools and psutil.
   Example:
   ```
diff --git a/psutil/tests/test_linux.py b/psutil/tests/test_linux.py
index 37352ecf..2a444592 100755
--- a/psutil/tests/test_linux.py
+++ b/psutil/tests/test_linux.py
@@ -462,6 +462,14 @@ class TestSystemCPU(unittest.TestCase):
         else:
             self.assertNotIn('guest_nice', fields)
 
+    @unittest.skipUnless(os.path.exists("/sys/devices/system/cpu/possible"),
+                         "/sys/devices/system/cpu/possible does not exist")
+    def test_cpu_count(self):
+        with open("/sys/devices/system/cpu/possible", "rb") as f:
+            data = f.read().strip()
+        highest = int(data.split('-')[1]) + 1
+        self.assertEqual(psutil.cpu_count(), highest)
+
     @unittest.skipUnless(os.path.exists("/sys/devices/system/cpu/online"),
                          "/sys/devices/system/cpu/online does not exist")
     def test_cpu_count_logical_w_sysdev_cpu_online(self):