add test_parametrize_ids_iterator_without_mark

Author: blueyed

testing/python/metafunc.py

@@ -201,6 +201,26 @@ def func(x, y):
                 ("x", "y"), [("abc", "def"), ("ghi", "jkl")], ids=["one"]
             )
 
+    def test_parametrize_ids_iterator_without_mark(self):
+        import itertools
+
+        def func(x, y):
+            pass
+
+        it = itertools.count()
+
+        metafunc = self.Metafunc(func)
+        metafunc.parametrize("x", [1, 2], ids=it)
+        metafunc.parametrize("y", [3, 4], ids=it)
+        ids = [x.id for x in metafunc._calls]
+        assert ids == ["0-2", "0-3", "1-2", "1-3"]
+
+        metafunc = self.Metafunc(func)
+        metafunc.parametrize("x", [1, 2], ids=it)
+        metafunc.parametrize("y", [3, 4], ids=it)
+        ids = [x.id for x in metafunc._calls]
+        assert ids == ["4-6", "4-7", "5-6", "5-7"]
+
     def test_parametrize_empty_list(self):
         """#510"""