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//usr/local/lib/python3.9/unittest/test/testmock/testcallable.py

# Copyright (C) 2007-2012 Michael Foord & the mock team
# E-mail: fuzzyman AT voidspace DOT org DOT uk
# http://www.voidspace.org.uk/python/mock/

import unittest
from unittest.test.testmock.support import is_instance, X, SomeClass

from unittest.mock import (
    Mock, MagicMock, NonCallableMagicMock,
    NonCallableMock, patch, create_autospec,
    CallableMixin
)

class TestCallable(unittest.TestCase):

def assertNotCallable(self, mock):
        self.assertTrue(is_instance(mock, NonCallableMagicMock))
        self.assertFalse(is_instance(mock, CallableMixin))

def test_non_callable(self):
        for mock in NonCallableMagicMock(), NonCallableMock():
            self.assertRaises(TypeError, mock)
            self.assertFalse(hasattr(mock, '__call__'))
            self.assertIn(mock.__class__.__name__, repr(mock))

def test_hierarchy(self):
        self.assertTrue(issubclass(MagicMock, Mock))
        self.assertTrue(issubclass(NonCallableMagicMock, NonCallableMock))

def test_attributes(self):
        one = NonCallableMock()
        self.assertTrue(issubclass(type(one.one), Mock))

two = NonCallableMagicMock()
        self.assertTrue(issubclass(type(two.two), MagicMock))

def test_subclasses(self):
        class MockSub(Mock):
            pass

one = MockSub()
        self.assertTrue(issubclass(type(one.one), MockSub))

class MagicSub(MagicMock):
            pass

two = MagicSub()
        self.assertTrue(issubclass(type(two.two), MagicSub))

def test_patch_spec(self):
        patcher = patch('%s.X' % __name__, spec=True)
        mock = patcher.start()
        self.addCleanup(patcher.stop)

instance = mock()
        mock.assert_called_once_with()

self.assertNotCallable(instance)
        self.assertRaises(TypeError, instance)

def test_patch_spec_set(self):
        patcher = patch('%s.X' % __name__, spec_set=True)
        mock = patcher.start()
        self.addCleanup(patcher.stop)

instance = mock()
        mock.assert_called_once_with()

self.assertNotCallable(instance)
        self.assertRaises(TypeError, instance)

def test_patch_spec_instance(self):
        patcher = patch('%s.X' % __name__, spec=X())
        mock = patcher.start()
        self.addCleanup(patcher.stop)

self.assertNotCallable(mock)
        self.assertRaises(TypeError, mock)

def test_patch_spec_set_instance(self):
        patcher = patch('%s.X' % __name__, spec_set=X())
        mock = patcher.start()
        self.addCleanup(patcher.stop)

self.assertNotCallable(mock)
        self.assertRaises(TypeError, mock)

def test_patch_spec_callable_class(self):
        class CallableX(X):
            def __call__(self): pass

class Sub(CallableX):
            pass

class Multi(SomeClass, Sub):
            pass

for arg in 'spec', 'spec_set':
            for Klass in CallableX, Sub, Multi:
                with patch('%s.X' % __name__, **{arg: Klass}) as mock:
                    instance = mock()
                    mock.assert_called_once_with()

self.assertTrue(is_instance(instance, MagicMock))
                    # inherited spec
                    self.assertRaises(AttributeError, getattr, instance,
                                      'foobarbaz')

result = instance()
                    # instance is callable, result has no spec
                    instance.assert_called_once_with()

result(3, 2, 1)
                    result.assert_called_once_with(3, 2, 1)
                    result.foo(3, 2, 1)
                    result.foo.assert_called_once_with(3, 2, 1)

def test_create_autospec(self):
        mock = create_autospec(X)
        instance = mock()
        self.assertRaises(TypeError, instance)

mock = create_autospec(X())
        self.assertRaises(TypeError, mock)

def test_create_autospec_instance(self):
        mock = create_autospec(SomeClass, instance=True)

self.assertRaises(TypeError, mock)
        mock.wibble()
        mock.wibble.assert_called_once_with()

self.assertRaises(TypeError, mock.wibble, 'some',  'args')

if __name__ == "__main__":
    unittest.main()