Fix typo induced bug in split_collection

tests/utils/test_vobject.py

@@ -7,6 +7,8 @@
     :license: MIT, see LICENSE for more details.
 '''
 
+import pytest
+
 import vdirsyncer.utils.vobject as vobject
 
 from .. import BARE_EVENT_TEMPLATE, EVENT_TEMPLATE, VCARD_TEMPLATE, \
@@ -52,6 +54,20 @@ def test_split_collection_multiple_wrappers():
         assert [x.splitlines() for x in given] == \
             [x.splitlines() for x in _simple_split]
 
+def test_split_collection_different_wrappers():
+    with pytest.raises(ValueError) as exc_info:
+        list(vobject.split_collection(u'BEGIN:VADDRESSBOOK\r\n'
+                                 u'BEGIN:FOO\r\n'
+                                 u'END:FOO\r\n'
+                                 u'END:VADDRESSBOOK\r\n'
+                                 u'BEGIN:VCALENDAR\r\n'
+                                 u'BEGIN:FOO\r\n'
+                                 u'END:FOO\r\n'
+                                 u'END:VCALENDAR\r\n'))
+
+    assert 'different types of components at top-level' in \
+            str(exc_info.value).lower()
+
 
 def test_join_collection_simple():
     given = vobject.join_collection(_simple_split)

vdirsyncer/utils/vobject.py

@@ -143,7 +143,7 @@ def split_collection(text, inline=(u'VTIMEZONE',),
             else:
                 start = end = u''
 
-        if collection.name != collection.name:
+        if collection.name != collection_name:
             raise ValueError('Different types of components at top-level. '
                              'Expected {}, got {}.'
                              .format(collection_name, collection.name))