def test_found_non_windows(self):
"zbar loaded ok on non-Windows platform"
self.platform.system.return_value = 'Not windows'
res = zbar_library.load()
self.platform.system.assert_called_once_with()
self.find_library.assert_called_once_with('zbar')
self.cdll.LoadLibrary.assert_called_once_with(
self.find_library.return_value
)
self.assertEqual((self.cdll.LoadLibrary.return_value, []), res)
self.assertEqual(0, self.windows_fnames.call_count)
def test_found_windows(self):
"zbar found on Windows"
self.platform.system.return_value = 'Windows'
res = zbar_library.load()
self.platform.system.assert_called_once_with()
self.cdll.LoadLibrary.assert_has_calls([
call('dependency fname'),
call('dll fname'),
])
self.assertEqual(
(
self.cdll.LoadLibrary.return_value,
[self.cdll.LoadLibrary.return_value]
),
res
)
def test_found_second_attempt_windows(self):
"zbar found on the second attempt on Windows"
self.platform.system.return_value = 'Windows'
self.cdll.LoadLibrary.side_effect = [
OSError, # First call does not load dependent DLL
'loaded dependency', # Second call loads dependent DLL
'loaded zbar', # Third call loads dependent DLL
]
res = zbar_library.load()
self.platform.system.assert_called_once_with()
self.cdll.LoadLibrary.assert_has_calls([
call('dependency fname'),
call(str(Path(zbar_library.__file__).parent.joinpath(
'dependency fname'
))),
call(str(Path(zbar_library.__file__).parent.joinpath(
'dll fname'
))),
])
self.assertEqual(('loaded zbar', ['loaded dependency']), res)