fix for no data

changelog.txt

@@ -4,6 +4,8 @@ jc changelog
 - Update airport_s parser to fix error on parsing empty data
 - Update arp parser to fix error on parsing empty data
 - Update blkid parser to fix error on parsing empty data
+- Update crontab parser to fix error on parsing empty data
+- Update crontab_u parser to fix error on parsing empty data
 - Add tests to all parsers for no data condition
 
 20200610 v1.11.4

jc/parsers/crontab.py

@@ -132,7 +132,7 @@ import jc.parsers.universal
 
 
 class info():
-    version = '1.2'
+    version = '1.3'
     description = 'crontab command and file parser'
     author = 'Kelly Brazil'
     author_email = 'kellyjonbrazil@gmail.com'
@@ -225,6 +225,7 @@ def parse(data, raw=False, quiet=False):
     # Clear any blank lines
     cleandata = list(filter(None, cleandata))
 
+    if cleandata:
         # Clear any commented lines
         for i, line in reversed(list(enumerate(cleandata))):
             if line.strip().startswith('#'):

jc/parsers/crontab_u.py

@@ -133,7 +133,7 @@ import jc.parsers.universal
 
 
 class info():
-    version = '1.1'
+    version = '1.2'
     description = 'crontab file parser with user support'
     author = 'Kelly Brazil'
     author_email = 'kellyjonbrazil@gmail.com'
@@ -226,6 +226,7 @@ def parse(data, raw=False, quiet=False):
     # Clear any blank lines
     cleandata = list(filter(None, cleandata))
 
+    if cleandata:
         # Clear any commented lines
         for i, line in reversed(list(enumerate(cleandata))):
             if line.strip().startswith('#'):

tests/test_crontab.py

@@ -17,6 +17,12 @@ class MyTests(unittest.TestCase):
         with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/crontab.json'), 'r', encoding='utf-8') as f:
             self.centos_7_7_crontab_json = json.loads(f.read())
 
+    def test_crontab_nodata(self):
+        """
+        Test 'crontab' with no data
+        """
+        self.assertEqual(jc.parsers.crontab.parse('', quiet=True), {})
+
     def test_crontab_centos_7_7(self):
         """
         Test 'crontab' on Centos 7.7

tests/test_crontab_u.py

@@ -23,6 +23,12 @@ class MyTests(unittest.TestCase):
         with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/crontab-u.json'), 'r', encoding='utf-8') as f:
             self.centos_7_7_crontab_u_json = json.loads(f.read())
 
+    def test_crontab_u_nodata(self):
+        """
+        Test 'crontab' with no data (has a user field)
+        """
+        self.assertEqual(jc.parsers.crontab_u.parse('', quiet=True), {})
+
     def test_crontab_u_ubuntu_18_4(self):
         """
         Test 'crontab' on Ubuntu 18.4 (has a user field)