UnicodeEncodeError in detailed introspection of assert_called_with

[AndreasHogstrom]

Comparing called arguments with assert_called_with fails with UnicodeEncodeError when one of the arguments (either on the left or right) is a unicode string, non ascii.

Python 2.7.13

Below are two test cases that looks like they should work:

def test_assert_called_with_unicode_wrong_argument(mocker):
    stub = mocker.stub()
    stub('l\xc3\xb6k'.decode('UTF-8'))

    with pytest.raises(AssertionError):
        stub.assert_called_with(u'lak')


def test_assert_called_with_unicode_correct_argument(mocker):
    stub = mocker.stub()
    stub('l\xc3\xb6k'.decode('UTF-8'))

    stub.assert_called_with('l\xc3\xb6k'.decode('UTF-8'))

Result:

test_pytest_mock.py::test_assert_called_with_unicode_wrong_argument FAILED
test_pytest_mock.py::test_assert_called_with_unicode_correct_argument PASSED

==== FAILURES ====
______test_assert_called_with_unicode_wrong_argument _______

mocker = <pytest_mock.MockFixture object at 0x104868f90>

    def test_assert_called_with_unicode_wrong_argument(mocker):
        stub = mocker.stub()
        stub('l\xc3\xb6k'.decode('UTF-8'))

        with pytest.raises(AssertionError):
>           stub.assert_called_with(u'lak')
E           UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in position 10: ordinal not in range(128)

test_pytest_mock.py:544: UnicodeEncodeError

Truncated traceback:

> pytest-mock/test_pytest_mock.py(544)test_assert_called_with_unicode_wrong_argument()
-> stub.assert_called_with(u'lak')
  pytest-mock/pytest_mock.py(211)wrap_assert_called_with()
-> *args, **kwargs)
  pytest-mock/pytest_mock.py(192)assert_wrapper()
-> msg += '\nArgs:\n' + str(e)

[nicoddemus]

Thanks for the report!

[nicoddemus]

Released in 1.6.3, thanks!