add test against findmnt CLI utility

Signed-off-by: Giampaolo Rodola <g.rodola@gmail.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/psutil/tests/test_linux.py b/psutil/tests/test_linux.py
index cff67366..fb49c7f6 100755
--- a/psutil/tests/test_linux.py
+++ b/psutil/tests/test_linux.py
@@ -51,6 +51,7 @@ if LINUX:
     from psutil._pslinux import calculate_avail_vmem
     from psutil._pslinux import CLOCK_TICKS
     from psutil._pslinux import open_binary
+    from psutil._pslinux import RootFsDeviceFinder
 
 
 HERE = os.path.abspath(os.path.dirname(__file__))
@@ -1267,7 +1268,6 @@ class TestSystemDiskIoCounters(PsutilTestCase):
 class TestRootFsDeviceFinder(PsutilTestCase):
 
     def test_it(self):
-        from psutil._pslinux import RootFsDeviceFinder
         dev = os.stat("/").st_dev
         major = os.major(dev)
         minor = os.minor(dev)
@@ -1293,6 +1293,12 @@ class TestRootFsDeviceFinder(PsutilTestCase):
         if base and c:
             self.assertEqual(base, c)
 
+    @unittest.skipIf(not which("findmnt"), "findmnt utility not available")
+    def test_against_findmnt(self):
+        psutil_value = RootFsDeviceFinder().find()
+        findmnt_value = sh("findmnt -o SOURCE -rn /")
+        self.assertEqual(psutil_value, findmnt_value)
+
 
 # =====================================================================
 # --- misc