Add regression test.

Author: groutr

toolz/tests/test_itertoolz.py

@@ -318,6 +318,16 @@ def test_partition_all():
     assert list(partition_all(3, range(5))) == [(0, 1, 2), (3, 4)]
     assert list(partition_all(2, [])) == []
 
+    # Regression test: https://github.com/pytoolz/toolz/issues/387
+    class NoCompare(object):
+        def __eq__(self, other):
+            if self.__class__ == other.__class__:
+                return True
+            raise ValueError()
+    obj = NoCompare()
+    assert list(partition_all(2, [obj]*3)) == [(obj, obj), (obj,)]
+
+
 
 def test_count():
     assert count((1, 2, 3)) == 3