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[3.7] bpo-17185: Add __signature__ to mock that can be used by inspect for signature (GH11048) #11125

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Merged
cjw296 merged 1 commit into from
Dec 12, 2018
Merged

[3.7] bpo-17185: Add __signature__ to mock that can be used by inspect for signature (GH11048) #11125

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6 changes: 4 additions & 2 deletions Lib/unittest/mock.py
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,7 @@ def checksig(_mock_self, *args, **kwargs):
sig.bind(*args, **kwargs)
_copy_func_details(func, checksig)
type(mock)._mock_check_sig = checksig
type(mock).__signature__ = sig


def _copy_func_details(func, funcopy):
Expand Down Expand Up @@ -171,11 +172,11 @@ def checksig(*args, **kwargs):
return mock(*args, **kwargs)""" % name
exec (src, context)
funcopy = context[name]
_setup_func(funcopy, mock)
_setup_func(funcopy, mock, sig)
return funcopy


def _setup_func(funcopy, mock):
def _setup_func(funcopy, mock, sig):
funcopy.mock = mock

# can't use isinstance with mocks
Expand Down Expand Up @@ -223,6 +224,7 @@ def reset_mock():
funcopy.assert_called = assert_called
funcopy.assert_not_called = assert_not_called
funcopy.assert_called_once = assert_called_once
funcopy.__signature__ = sig

mock._mock_delegate = funcopy

Expand Down
30 changes: 30 additions & 0 deletions Lib/unittest/test/testmock/testhelpers.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import inspect
import time
import types
import unittest
Expand Down Expand Up @@ -901,6 +902,35 @@ def __getattr__(self, attribute):
self.assertFalse(hasattr(autospec, '__name__'))


def test_spec_inspect_signature(self):

def myfunc(x, y):
pass

mock = create_autospec(myfunc)
mock(1, 2)
mock(x=1, y=2)

self.assertEqual(inspect.getfullargspec(mock), inspect.getfullargspec(myfunc))
self.assertEqual(mock.mock_calls, [call(1, 2), call(x=1, y=2)])
self.assertRaises(TypeError, mock, 1)


def test_spec_inspect_signature_annotations(self):

def foo(a: int, b: int=10, *, c:int) -> int:
return a + b + c

mock = create_autospec(foo)
mock(1, 2, c=3)
mock(1, c=3)

self.assertEqual(inspect.getfullargspec(mock), inspect.getfullargspec(foo))
self.assertEqual(mock.mock_calls, [call(1, 2, c=3), call(1, c=3)])
self.assertRaises(TypeError, mock, 1)
self.assertRaises(TypeError, mock, 1, 2, 3, c=4)


class TestCallList(unittest.TestCase):

def test_args_list_contains_call_list(self):
Expand Down
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2018-12-09-17-04-15.bpo-17185.SfSCJF.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Set ``__signature__`` on mock for :mod:`inspect` to get signature.
Patch by Karthikeyan Singaravelan.