sysinfo: unittest adjustments

As the sysinfo configuration moves from hard coded to configurable,
unittests should not count on any existing condition, such as the
existence of files or commands collected.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

selftests/all/functional/avocado/sysinfo_tests.py

@@ -40,8 +40,8 @@ class SysInfoTest(unittest.TestCase):
         self.assertGreater(len(os.listdir(sysinfo_dir)), 0, msg)
         for hook in ('pre', 'post'):
             sysinfo_subdir = os.path.join(sysinfo_dir, hook)
-            msg = 'The sysinfo/%s subdirectory is empty:\n%s' % (hook, result)
-            self.assertGreater(len(os.listdir(sysinfo_subdir)), 0, msg)
+            msg = 'The sysinfo/%s subdirectory does not exist:\n%s' % (hook, result)
+            self.assertTrue(os.path.exists(sysinfo_subdir), msg)
 
     def test_sysinfo_disabled(self):
         os.chdir(basedir)

selftests/all/unit/avocado/sysinfo_unittest.py

@@ -69,13 +69,9 @@ class SysinfoTest(unittest.TestCase):
                                 "Job does not have 'pre' dir")
         job_predir = os.path.join(jobdir, 'pre')
         self.assertTrue(os.path.isdir(job_predir))
-        self.assertGreater(len(os.listdir(job_predir)), 0,
-                           "Job pre dir is empty")
         sysinfo_logger.end_job_hook()
         job_postdir = os.path.join(jobdir, 'post')
         self.assertTrue(os.path.isdir(job_postdir))
-        self.assertGreater(len(os.listdir(job_postdir)), 0,
-                           "Job post dir is empty")
 
     def test_logger_test_hooks(self):
         testdir = os.path.join(self.tmpdir, 'job', 'test1')