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from unittest import TestCase
from testfixtures.mock import Mock, MagicMock, patch, DEFAULT
from testfixtures import wrap, compare, log_capture, LogCapture
class TestWrap(TestCase):
def test_wrapping(self):
m = Mock()
@wrap(m.before, m.after)
def test_function(r):
m.test()
return 'something'
compare(m.method_calls, [])
compare(test_function(), 'something')
compare(m.method_calls, [
('before', (), {}),
('test', (), {}),
('after', (), {})
])
def test_wrapping_only_before(self):
before = Mock()
@wrap(before)
def test_function():
return 'something'
self.assertFalse(before.called)
compare(test_function(), 'something')
compare(before.call_count, 1)
def test_wrapping_wants_return(self):
m = Mock()
m.before.return_value = 'something'
@wrap(m.before, m.after)
def test_function(r):
m.test(r)
return 'r:'+r
compare(m.method_calls, [])
compare(test_function(), 'r:something')
compare(m.method_calls, [
('before', (), {}),
('test', ('something', ), {}),
('after', (), {})
])
def test_wrapping_wants_arguments(self):
# This only works in python 2.5+, for
# earlier versions, you'll have to come
# up with your own `partial` class...
from functools import partial
m = Mock()
@wrap(partial(m.before, 1, x=2), partial(m.after, 3, y=4))
def test_function(r):
m.test()
return 'something'
compare(m.method_calls, [])
compare(test_function(), 'something')
compare(m.method_calls, [
('before', (1, ), {'x': 2}),
('test', (), {}),
('after', (3, ), {'y': 4})
])
def test_multiple_wrappers(self):
m = Mock()
@wrap(m.before2, m.after2)
@wrap(m.before1, m.after1)
def test_function():
m.test_function()
return 'something'
compare(m.method_calls, [])
compare(test_function(), 'something')
compare(m.method_calls, [
('before1', (), {}),
('before2', (), {}),
('test_function', (), {}),
('after2', (), {}),
('after1', (), {}),
])
def test_multiple_wrappers_wants_return(self):
m = Mock()
m.before1.return_value = 1
m.before2.return_value = 2
@wrap(m.before2, m.after2)
@wrap(m.before1, m.after1)
def test_function(r1, r2):
m.test_function(r1, r2)
return 'something'
compare(m.method_calls, [])
compare(test_function(), 'something')
compare(m.method_calls, [
('before1', (), {}),
('before2', (), {}),
('test_function', (1, 2), {}),
('after2', (), {}),
('after1', (), {}),
])
def test_multiple_wrappers_only_want_first_return(self):
m = Mock()
m.before1.return_value = 1
@wrap(m.before2, m.after2)
@wrap(m.before1, m.after1)
def test_function(r1):
m.test_function(r1)
return 'something'
compare(m.method_calls, [])
compare(test_function(), 'something')
compare(m.method_calls, [
('before1', (), {}),
('before2', (), {}),
('test_function', (1, ), {}),
('after2', (), {}),
('after1', (), {}),
])
def test_wrap_method(self):
m = Mock()
class T:
@wrap(m.before, m.after)
def method(self):
m.method()
T().method()
compare(m.method_calls, [
('before', (), {}),
('method', (), {}),
('after', (), {})
])
def test_wrap_method_wants_return(self):
m = Mock()
m.before.return_value = 'return'
class T:
@wrap(m.before, m.after)
def method(self, r):
m.method(r)
T().method()
compare(m.method_calls, [
('before', (), {}),
('method', ('return', ), {}),
('after', (), {})
])
def test_wrapping_different_functions(self):
m = Mock()
@wrap(m.before1, m.after1)
def test_function1():
m.something1()
return 'something1'
@wrap(m.before2, m.after2)
def test_function2():
m.something2()
return 'something2'
compare(m.method_calls, [])
compare(test_function1(), 'something1')
compare(m.method_calls, [
('before1', (), {}),
('something1', (), {}),
('after1', (), {})
])
compare(test_function2(), 'something2')
compare(m.method_calls, [
('before1', (), {}),
('something1', (), {}),
('after1', (), {}),
('before2', (), {}),
('something2', (), {}),
('after2', (), {})
])
def test_wrapping_local_vars(self):
m = Mock()
@wrap(m.before, m.after)
def test_function():
something = 1
m.test()
return 'something'
compare(m.method_calls, [])
compare(test_function(), 'something')
compare(m.method_calls, [
('before', (), {}),
('test', (), {}),
('after', (), {})
])
def test_wrapping__name__(self):
m = Mock()
@wrap(m.before, m.after)
def test_function():
pass # pragma: no cover
compare(test_function.__name__, 'test_function')
def test_our_wrap_dealing_with_mock_patch(self):
@patch.multiple('testfixtures.tests.sample1', X=DEFAULT)
@log_capture()
def patched(log, X):
from testfixtures.tests.sample1 import X as imported_X
assert isinstance(log, LogCapture)
assert isinstance(X, MagicMock)
assert imported_X is X
patched()
def test_patch_with_dict(self):
@patch('testfixtures.tests.sample1.X', {'x': 1})
@log_capture()
def patched(log):
assert isinstance(log, LogCapture)
from testfixtures.tests.sample1 import X
assert X == {'x': 1}
patched()