fix odd cases for 35 vs 36

Author: samuelcolvin

devtools/prettier.py

@@ -103,7 +103,7 @@ def _format_tuples(self, value: tuple, value_repr: str, indent_current: int, ind
             self._stream.write(value.__class__.__name__ + '(\n')
             for field, v in zip(fields, value):
                 self._stream.write(indent_new * self._c)
-                if field:  # field is falsy for odd things like call_args
+                if field:  # field is falsy sometimes for odd things like call_args
                     self._stream.write(str(field))
                     self._stream.write('=')
                 self._format(v, indent_new, False)

tests/test_prettier.py

@@ -1,8 +1,10 @@
 import string
+import sys
 from collections import OrderedDict, namedtuple
 from unittest.mock import MagicMock
 
 import numpy
+import pytest
 
 from devtools.ansi import strip_ansi
 from devtools.prettier import PrettyFormat, pformat, pprint
@@ -209,7 +211,8 @@ def test_deep_objects():
 )"""
 
 
-def test_call_args():
+@pytest.mark.skipif(sys.version_info >= (3, 6), reason='like this only for 3.5')
+def test_call_args_py35():
     m = MagicMock()
     m(1, 2, 3, a=4)
     v = pformat(m.call_args)
@@ -219,3 +222,16 @@ def test_call_args():
     (1, 2, 3),
     {'a': 4},
 )"""
+
+
+@pytest.mark.skipif(sys.version_info < (3, 6), reason='different for 3.5')
+def test_call_args_py36():
+    m = MagicMock()
+    m(1, 2, 3, a=4)
+    v = pformat(m.call_args)
+
+    assert v == """\
+_Call(
+    _fields=(1, 2, 3),
+    {'a': 4},
+)"""