add fix for no data

changelog.txt

@@ -7,6 +7,7 @@ jc changelog
 - Update crontab parser to fix error on parsing empty data
 - Update crontab_u parser to fix error on parsing empty data
 - Update df parser to fix error on parsing empty data
+- Update free parser to fix error on parsing empty data
 - Add tests to all parsers for no data condition
 
 20200610 v1.11.4

jc/parsers/free.py

@@ -53,7 +53,7 @@ import jc.parsers.universal
 
 
 class info():
-    version = '1.0'
+    version = '1.1'
     description = 'free command parser'
     author = 'Kelly Brazil'
     author_email = 'kellyjonbrazil@gmail.com'
@@ -122,14 +122,17 @@ def parse(data, raw=False, quiet=False):
         jc.utils.compatibility(__name__, info.compatible)
 
     cleandata = data.splitlines()
-    cleandata[0] = cleandata[0].lower()
-    cleandata[0] = cleandata[0].replace('buff/cache', 'buff_cache')
-    cleandata[0] = 'type ' + cleandata[0]
+    raw_output = []
 
-    raw_output = jc.parsers.universal.simple_table_parse(cleandata)
+    if cleandata:
+        cleandata[0] = cleandata[0].lower()
+        cleandata[0] = cleandata[0].replace('buff/cache', 'buff_cache')
+        cleandata[0] = 'type ' + cleandata[0]
 
-    for entry in raw_output:
-        entry['type'] = entry['type'].rstrip(':')
+        raw_output = jc.parsers.universal.simple_table_parse(cleandata)
+
+        for entry in raw_output:
+            entry['type'] = entry['type'].rstrip(':')
 
     if raw:
         return raw_output

tests/test_free.py

@@ -35,6 +35,12 @@ class MyTests(unittest.TestCase):
         with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/free-h.json'), 'r', encoding='utf-8') as f:
             self.ubuntu_18_4_free_h_json = json.loads(f.read())
 
+    def test_free_nodata(self):
+        """
+        Test 'free' with no data
+        """
+        self.assertEqual(jc.parsers.free.parse('', quiet=True), [])
+
     def test_free_centos_7_7(self):
         """
         Test 'free' on Centos 7.7