[Issue #449] fix "delete" test module

Author: gsmolk

tests/delete.py

@@ -263,7 +263,7 @@ def test_delete_orphaned_wal_segments(self):
         node.stop()
 
         # Check wals
-        wals_dir = os.path.join(backup_dir, 'wal', 'node')
+        wals_dir = os.path.join(backup_dir, 'wal', 'node', '00000000')
         wals = [f for f in os.listdir(wals_dir) if os.path.isfile(os.path.join(wals_dir, f))]
         original_wal_quantity = len(wals)
 
@@ -299,8 +299,10 @@ def test_delete_orphaned_wal_segments(self):
 
         # Delete last backup
         self.delete_pb(backup_dir, 'node', backup_3_id, options=['--wal'])
-        wals = [f for f in os.listdir(wals_dir) if os.path.isfile(os.path.join(wals_dir, f))]
-        self.assertEqual (0, len(wals), "Number of wals should be equal to 0")
+
+        self.assertFalse(
+            os.path.exists(wals_dir),
+            "Number of wals should be equal to 0")
 
         # Clean after yourself
         self.del_test_dir(module_name, fname)