FIX(buku) ff json import folder w/o children

- fixes jarun/Buku#340
- replaced error with warning
- proper warning message added
- test added

buku

@@ -3027,7 +3027,7 @@ def import_firefox_json(json, add_bookmark_folder_as_tag=False, unique_tag=None)
                            .format(bm_entry['uri'], bm_entry['title'], tags, desc))
                     yield (bm_entry['uri'], bm_entry['title'], tags, desc, 0, True, False)
                 except Exception as e:
-                    LOGERR(e)
+                    LOGERR("Error parsing entry '{}' Exception '{}'".format(bm_entry['title'], e))
 
             elif TypeCode.folder.value == typeCode:
                 try:
@@ -3037,9 +3037,9 @@ def import_firefox_json(json, add_bookmark_folder_as_tag=False, unique_tag=None)
                     for entry in iterate_children(
                             parent_folder+"/"+bm_entry['title'], bm_entry['children']):
                         yield entry
-                except Exception as e:
+                except Exception:
                     # if any of the properties does not exist, bail out silently
-                    LOGERR(e)
+                    LOGDBG("No 'children' found in bookmark folder - skipping: {}".format(bm_entry['title']))
 
             elif TypeCode.separator.value == typeCode:
                 LOGDBG("Unknown typeCode found : {}".format(typeCode))

tests/test_import_firefox_json.py

@@ -110,6 +110,25 @@ def test_load_invalid_typecode():
 
     assert len(result) == 0
 
+def test_load_folder_with_no_children():
+    """test method."""
+
+    # Arrange
+    data = json.loads("""
+        {
+            "title" : "title",
+            "typeCode" : 2
+        } """)
+
+    # Act
+    items = import_firefox_json(data)
+
+    # Assert
+    result = []
+    for item in items:
+        result.append(item)
+
+    assert 0 == len(result)
 
 def test_load_one_child():
     """test method."""