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Mini Shell
Mini Shell
from operator import getitem
from testfixtures import (
Replacer,
Replace,
ShouldRaise,
TempDirectory,
replace,
compare,
not_there,
replace_in_environ,
replace_on_class,
replace_in_module,
)
from unittest import TestCase
import os
from testfixtures.mock import Mock
from testfixtures.tests import sample1, sample3
from testfixtures.tests import sample2
from .sample1 import z, X
from .sample3 import SOME_CONSTANT
from ..compat import PY_310_PLUS
from warnings import catch_warnings
class TestReplace(TestCase):
def test_function(self):
def test_z():
return 'replacement z'
compare(sample1.z(), 'original z')
@replace('testfixtures.tests.sample1.z', test_z)
def test_something():
compare(sample1.z(), 'replacement z')
compare(sample1.z(), 'original z')
test_something()
compare(sample1.z(), 'original z')
def test_class(self):
OriginalX = sample1.X
class ReplacementX(sample1.X):
pass
self.assertFalse(OriginalX is ReplacementX)
self.assertTrue(isinstance(sample1.X(), OriginalX))
@replace('testfixtures.tests.sample1.X', ReplacementX)
def test_something():
self.assertFalse(OriginalX is ReplacementX)
self.assertTrue(isinstance(sample1.X(), ReplacementX))
self.assertFalse(OriginalX is ReplacementX)
self.assertTrue(isinstance(sample1.X(), OriginalX))
test_something()
self.assertFalse(OriginalX is ReplacementX)
self.assertTrue(isinstance(sample1.X(), OriginalX))
def test_method(self):
def test_y(self):
return self
compare(sample1.X().y(), 'original y')
@replace('testfixtures.tests.sample1.X.y', test_y)
def test_something():
self.assertTrue(isinstance(sample1.X().y(), sample1.X))
compare(sample1.X().y(), 'original y')
test_something()
compare(sample1.X().y(), 'original y')
def test_class_method(self):
def rMethod(cls):
return (cls, 1)
compare(sample1.X().aMethod(), sample1.X)
@replace('testfixtures.tests.sample1.X.aMethod', rMethod)
def test_something(r):
compare(r, rMethod)
compare(sample1.X().aMethod(), (sample1.X, 1))
compare(sample1.X().aMethod(), sample1.X)
test_something()
compare(sample1.X().aMethod(), sample1.X)
def test_multiple_replace(self):
def test_y(self):
return 'test y'
def test_z():
return 'test z'
compare(sample1.z(), 'original z')
compare(sample1.X().y(), 'original y')
@replace('testfixtures.tests.sample1.z', test_z)
@replace('testfixtures.tests.sample1.X.y', test_y)
def test_something(passed_test_y, passed_test_z):
compare(test_z, passed_test_z)
compare(test_y, passed_test_y)
compare(sample1.z(), 'test z')
compare(sample1.X().y(), 'test y')
compare(sample1.z(), 'original z')
compare(sample1.X().y(), 'original y')
test_something()
compare(sample1.z(), 'original z')
compare(sample1.X().y(), 'original y')
def test_gotcha(self):
# Just because you replace an object in one context,
# doesn't meant that it's replaced in all contexts!
def test_z():
return 'test z'
compare(sample1.z(), 'original z')
compare(sample2.z(), 'original z')
@replace('testfixtures.tests.sample1.z', test_z)
def test_something():
compare(sample1.z(), 'test z')
compare(sample2.z(), 'original z')
compare(sample1.z(), 'original z')
compare(sample2.z(), 'original z')
test_something()
compare(sample1.z(), 'original z')
compare(sample2.z(), 'original z')
def test_raises(self):
def test_z():
return 'replacement z'
compare(sample1.z(), 'original z')
@replace('testfixtures.tests.sample1.z', test_z)
def test_something():
compare(sample1.z(), 'replacement z')
raise Exception()
compare(sample1.z(), 'original z')
with ShouldRaise():
test_something()
compare(sample1.z(), 'original z')
def test_want_replacement(self):
o = object()
@replace('testfixtures.tests.sample1.z', o)
def test_something(r):
self.assertTrue(r is o)
self.assertTrue(sample1.z is o)
test_something()
def test_not_there(self):
o = object()
@replace('testfixtures.tests.sample1.bad', o)
def test_something(r):
pass # pragma: no cover
with ShouldRaise(AttributeError("Original 'bad' not found")):
test_something()
def test_not_there_ok(self):
o = object()
@replace('testfixtures.tests.sample1.bad', o, strict=False)
def test_something(r):
self.assertTrue(r is o)
self.assertTrue(sample1.bad is o)
test_something()
def test_replace_dict(self):
from testfixtures.tests.sample1 import some_dict
original = some_dict['key']
replacement = object()
@replace('testfixtures.tests.sample1.some_dict.key', replacement)
def test_something(obj):
self.assertTrue(obj is replacement)
self.assertTrue(some_dict['key'] is replacement)
test_something()
self.assertTrue(some_dict['key'] is original)
def test_replace_delattr(self):
from testfixtures.tests import sample1
@replace('testfixtures.tests.sample1.some_dict', not_there)
def test_something(obj):
self.assertFalse(hasattr(sample1, 'some_dict'))
test_something()
self.assertEqual(sample1.some_dict,
{'complex_key': [1, 2, 3], 'key': 'value'})
def test_replace_delattr_not_there(self):
@replace('testfixtures.tests.sample1.foo', not_there)
def test_something(obj):
pass # pragma: no cover
with ShouldRaise(AttributeError("Original 'foo' not found")):
test_something()
def test_replace_delattr_not_there_not_strict(self):
from testfixtures.tests import sample1
@replace('testfixtures.tests.sample1.foo',
not_there, strict=False)
def test_something(obj):
self.assertFalse(hasattr(sample1, 'foo'))
test_something()
def test_replace_delattr_not_there_restored(self):
from testfixtures.tests import sample1
@replace('testfixtures.tests.sample1.foo',
not_there, strict=False)
def test_something(obj):
sample1.foo = 'bar'
test_something()
self.assertFalse(hasattr(sample1, 'foo'))
def test_replace_delattr_cant_remove(self):
if PY_310_PLUS:
message = "cannot set 'today' attribute of " \
"immutable type 'datetime.datetime'"
else:
message = "can't set attributes of " \
"built-in/extension type 'datetime.datetime'"
with Replacer() as r:
with ShouldRaise(TypeError(message)):
r.replace('datetime.datetime.today', not_there)
def test_replace_delattr_cant_remove_not_strict(self):
if PY_310_PLUS:
message = "cannot set 'today' attribute of " \
"immutable type 'datetime.datetime'"
else:
message = "can't set attributes of " \
"built-in/extension type 'datetime.datetime'"
with Replacer() as r:
with ShouldRaise(TypeError(message)):
r.replace('datetime.datetime.today', not_there, strict=False)
def test_replace_dict_remove_key(self):
from testfixtures.tests.sample1 import some_dict
@replace('testfixtures.tests.sample1.some_dict.key', not_there)
def test_something(obj):
self.assertFalse('key' in some_dict)
test_something()
self.assertEqual(sorted(some_dict.keys()), ['complex_key', 'key'])
def test_replace_dict_remove_key_not_there(self):
from testfixtures.tests.sample1 import some_dict
@replace('testfixtures.tests.sample1.some_dict.badkey', not_there)
def test_something(obj):
self.assertFalse('badkey' in some_dict) # pragma: no cover
with ShouldRaise(AttributeError("Original 'badkey' not found")):
test_something()
self.assertEqual(sorted(some_dict.keys()), ['complex_key', 'key'])
def test_replace_dict_remove_key_not_there_not_strict(self):
from testfixtures.tests.sample1 import some_dict
@replace('testfixtures.tests.sample1.some_dict.badkey',
not_there, strict=False)
def test_something(obj):
self.assertFalse('badkey' in some_dict)
test_something()
self.assertEqual(sorted(some_dict.keys()), ['complex_key', 'key'])
def test_replace_dict_ensure_key_not_there_restored(self):
from testfixtures.tests.sample1 import some_dict
@replace('testfixtures.tests.sample1.some_dict.badkey',
not_there, strict=False)
def test_something(obj):
some_dict['badkey'] = 'some test value'
test_something()
self.assertEqual(sorted(some_dict.keys()), ['complex_key', 'key'])
def test_replace_dict_not_there(self):
from testfixtures.tests.sample1 import some_dict
replacement = object()
@replace('testfixtures.tests.sample1.some_dict.key2',
replacement,
strict=False)
def test_something(obj):
self.assertTrue(obj is replacement)
self.assertTrue(some_dict['key2'] is replacement)
test_something()
self.assertEqual(sorted(some_dict.keys()), ['complex_key', 'key'])
def test_replace_dict_not_there_empty_string(self):
from testfixtures.tests.sample1 import some_dict
@replace('testfixtures.tests.sample1.some_dict.key2', '', strict=False)
def test_something():
self.assertEqual(some_dict['key2'], '')
test_something()
self.assertEqual(sorted(some_dict.keys()), ['complex_key', 'key'])
def test_replace_complex(self):
from testfixtures.tests.sample1 import some_dict
original = some_dict['complex_key'][1]
replacement = object()
@replace('testfixtures.tests.sample1.some_dict.complex_key.1',
replacement)
def test_something(obj):
self.assertTrue(obj is replacement)
self.assertEqual(some_dict['complex_key'], [1, obj, 3])
test_something()
self.assertEqual(some_dict['complex_key'], [1, 2, 3])
self.assertTrue(original is some_dict['complex_key'][1])
def test_replacer_del(self):
r = Replacer()
r.replace('testfixtures.tests.sample1.left_behind',
object(), strict=False)
with catch_warnings(record=True) as w:
del r
self.assertTrue(len(w), 1)
compare(str(w[0].message),
"Replacer deleted without being restored, originals left:"
" {'testfixtures.tests.sample1.left_behind': <Resolved: <not_there>>}")
def test_multiple_replaces(self):
orig = os.path.sep
with Replacer() as r:
r.replace('os.path.sep', '$')
compare(os.path.sep, '$')
r.replace('os.path.sep', '=')
compare(os.path.sep, '=')
compare(orig, os.path.sep)
def test_sub_module_import(self):
with TempDirectory() as dir:
dir.write('module/__init__.py', b'')
dir.write('module/submodule.py', b'def foo(): return "foo"')
with Replacer() as r:
r.replace('sys.path', [dir.path])
def bar():
return "bar"
# now test
r.replace('module.submodule.foo', bar)
from module.submodule import foo
compare(foo(), "bar")
def test_staticmethod(self):
compare(sample1.X.bMethod(), 2)
with Replacer() as r:
r.replace('testfixtures.tests.sample1.X.bMethod', lambda: 1)
compare(sample1.X.bMethod(), 1)
compare(sample1.X.bMethod(), 2)
def test_use_as_cleanup(self):
def test_z():
return 'replacement z'
compare(sample1.z(), 'original z')
replace = Replacer()
compare(sample1.z(), 'original z')
replace('testfixtures.tests.sample1.z', test_z)
cleanup = replace.restore
try:
compare(sample1.z(), 'replacement z')
finally:
cleanup()
compare(sample1.z(), 'original z')
def test_replace_context_manager(self):
def test_z():
return 'replacement z'
compare(sample1.z(), 'original z')
with Replace('testfixtures.tests.sample1.z', test_z) as z:
compare(z(), 'replacement z')
compare(sample1.z(), 'replacement z')
compare(sample1.z(), 'original z')
def test_multiple_context_managers(self):
def test_y(self):
return 'test y'
def test_z():
return 'test z'
compare(sample1.z(), 'original z')
compare(sample1.X().y(), 'original y')
with Replacer() as replace:
z = replace('testfixtures.tests.sample1.z', test_z)
y = replace('testfixtures.tests.sample1.X.y', test_y)
compare(z(), 'test z')
compare(y, sample1.X.y)
compare(sample1.X().y(), 'test y')
compare(sample1.z(), 'test z')
compare(sample1.X().y(), 'test y')
compare(sample1.z(), 'original z')
compare(sample1.X().y(), 'original y')
def test_context_manager_not_strict(self):
def test_z():
return 'replacement z'
with Replace('testfixtures.tests.sample1.foo', test_z, strict=False):
compare(sample1.foo(), 'replacement z')
def test_context_manager_full_spec(self):
my_dict = {}
with Replace(my_dict, name='foo', accessor=getitem, replacement=42, strict=False):
compare(my_dict, expected={'foo': 42})
compare(my_dict, expected={})
def test_decorator_full_spec(self):
my_dict = {}
@replace(my_dict, name='foo', accessor=getitem, replacement=42, strict=False)
def test_something():
compare(my_dict, expected={'foo': 42})
test_something()
compare(my_dict, expected={})
def test_replace_method_full_spec(self):
my_dict = {}
with Replacer() as r:
r.replace(my_dict, name='foo', accessor=getitem, replacement=42, strict=False)
compare(my_dict, expected={'foo': 42})
compare(my_dict, expected={})
def test_context_manager_specified_method(self):
class SampleClass:
def method(self, x):
return x*2
sample_obj = SampleClass()
with Replace(SampleClass.method, lambda self, x: x*3,
container=SampleClass, name='method', accessor=getattr):
compare(sample_obj.method(1), expected=3)
compare(sample_obj.method(1), expected=2)
def test_decorator_specified_method(self):
class SampleClass:
def method(self, x):
return x*2
sample_obj = SampleClass()
@replace(SampleClass.method, lambda self, x: x*3,
container=SampleClass, name='method', accessor=getattr)
def test_something():
compare(sample_obj.method(1), expected=3)
test_something()
compare(sample_obj.method(1), expected=2)
def test_fully_specified_method(self):
class SampleClass:
def method(self, x):
return x*2
sample_obj = SampleClass()
with Replacer() as r:
r.replace(SampleClass.method, lambda self, x: x*3,
container=SampleClass, name='method', accessor=getattr)
compare(sample_obj.method(1), expected=3)
compare(sample_obj.method(1), expected=2)
def test_fully_specified_method_incorrect_name(self):
class SampleClass:
def a(self):
return 1
def b(self):
return 2
sample_obj = SampleClass()
a_repr = repr(SampleClass.a)
b_repr = repr(SampleClass.b)
replacer = Replacer()
with ShouldRaise(AssertionError(f"'b' resolved to {b_repr}, expected {a_repr}")):
replacer(SampleClass.a, lambda self: 3,
container=SampleClass, name='b', accessor=getattr)
compare(sample_obj.a(), expected=1)
compare(sample_obj.b(), expected=2)
def test_traverse_from_container(self):
x = sample1.X()
with Replace('.X.aMethod', lambda cls: 'FOO', container=sample1):
compare(x.aMethod(), expected='FOO')
assert x.aMethod() is sample1.X
def test_only_relative_traverse_from_container(self):
x = sample1.X()
replacer = Replacer()
with ShouldRaise(AssertionError('Absolute traversal not allowed when container supplied')):
replacer('foo', object(), container=sample1)
def test_no_name_and_target_string(self):
x = sample1.X()
replacer = Replacer()
with ShouldRaise(TypeError('name cannot be specified when target is a string')):
replacer('.X', lambda cls: 'FOO', name='aMethod', container=sample1)
assert x.aMethod() is sample1.X
def test_no_accessor_allowed_when_name_not_specified(self):
my_dict = {}
replacer = Replacer()
with ShouldRaise(TypeError('accessor is not used unless name is specified')):
replacer(container=my_dict, target='.my.key', accessor=getitem, replacement='bar')
compare(my_dict, expected={})
def test_dict_and_name(self):
my_dict = {}
with Replace(my_dict, name='foo', replacement=42, strict=False):
compare(my_dict, expected={'foo': 42})
compare(my_dict, expected={})
def test_name_and_dict(self):
environ = {}
with Replace('.MY_ENV_VAR', 'True', container=environ, strict=False):
compare(environ, expected={'MY_ENV_VAR': 'True'})
compare(environ, expected={})
def test_obj_and_name(self):
my_obj = Mock()
foo = my_obj.foo
with Replace(my_obj, name='foo', replacement=42, strict=False):
compare(my_obj.foo, expected=42)
assert my_obj.foo is foo
def test_non_string_target_and_no_name(self):
my_dict = {}
replacer = Replacer()
with ShouldRaise(TypeError('name must be specified when target is not a string')):
replacer(my_dict, replacement=42, strict=False)
compare(my_dict, expected={})
def test_method_on_instance(self):
class SampleClass:
def method(self, x):
return x*2
sample = SampleClass()
with Replacer() as replace:
replace(sample.method, lambda x: x * 3, container=sample, strict=False)
compare(sample.method(1), expected=3)
compare(sample.method(1), expected=2)
def test_class_attribute(self):
mock = Mock()
mock.FOO = set()
class SampleClass:
FOO = mock.FOO
sample = SampleClass()
with Replace(SampleClass.FOO, {'X'}, container=SampleClass, name='FOO'):
compare(sample.FOO, expected={'X'})
compare(mock.FOO, expected=set())
compare(sample.FOO, expected=set())
def test_function_and_module(self):
with Replace(z, lambda: 'all new z', container=sample1):
from .sample1 import z as sample1_z
from .sample3 import z as sample3_z
compare(sample1_z(), expected='all new z')
compare(sample3_z(), expected='original z')
def test_constant(self):
with Replace(SOME_CONSTANT, 43, container=sample3, name='SOME_CONSTANT'):
from .sample3 import SOME_CONSTANT as sample3_some_constant
compare(sample3_some_constant, expected=43)
class TestEnviron:
def test_key_present(self):
os.environ['TESTFIXTURES_SAMPLE_KEY_PRESENT'] = 'ORIGINAL'
with Replacer() as replace:
replace.in_environ('TESTFIXTURES_SAMPLE_KEY_PRESENT', 'NEW')
compare(os.environ['TESTFIXTURES_SAMPLE_KEY_PRESENT'], expected='NEW')
compare(os.environ['TESTFIXTURES_SAMPLE_KEY_PRESENT'], expected='ORIGINAL')
def test_key_not_present(self):
assert 'TESTFIXTURES_SAMPLE_KEY_MISSING' not in os.environ
with Replacer() as replace:
replace.in_environ('TESTFIXTURES_SAMPLE_KEY_MISSING', 'NEW')
compare(os.environ['TESTFIXTURES_SAMPLE_KEY_MISSING'], expected='NEW')
assert 'TESTFIXTURES_SAMPLE_KEY_MISSING' not in os.environ
def test_non_string_replacement(self):
with Replacer() as replace:
replace.in_environ('PORT', 1)
compare(os.environ['PORT'], expected='1')
def test_ensure_not_present(self):
os.environ['TESTFIXTURES_SAMPLE_KEY_PRESENT'] = 'ORIGINAL'
with Replacer() as replace:
replace.in_environ('TESTFIXTURES_SAMPLE_KEY_PRESENT', not_there)
assert 'TESTFIXTURES_SAMPLE_KEY_PRESENT' not in os.environ
class TestOnClass:
def test_method_on_class(self):
class SampleClass:
def method(self, x):
return x*2
original = SampleClass.__dict__['method']
sample = SampleClass()
with Replacer() as replace:
replace.on_class(SampleClass.method, lambda self, x: x*3)
compare(sample.method(1), expected=3)
compare(sample.method(1), expected=2)
assert SampleClass.__dict__['method'] is original
def test_method_on_instance(self):
class SampleClass:
def method(self, x):
return x*2
original = SampleClass.__dict__['method']
sample = SampleClass()
with Replacer() as replace:
with ShouldRaise(AttributeError):
replace.on_class(sample.method, lambda self, x: x*3)
# ...so use explicit and non-strict:
replace(sample.method, lambda x: x * 3, container=sample, strict=False)
compare(sample.method(1), expected=3)
compare(sample.method(1), expected=2)
assert SampleClass.__dict__['method'] is original
def test_badly_decorated_method(self):
def bad(f):
def inner(self, x):
return f(self, x)
return inner
class SampleClass:
@bad
def method(self, x):
return x*2
original = SampleClass.__dict__['method']
sample = SampleClass()
with Replacer() as replace:
# without the name, we get a useful error:
with ShouldRaise(AttributeError(
f"could not find container of {SampleClass.method} using name 'inner'"
)):
replace.on_class(SampleClass.method, lambda self_, x: x*3)
assert SampleClass.__dict__['method'] is original
replace.on_class(SampleClass.method, lambda self_, x: x*3, name='method')
compare(sample.method(1), expected=3)
compare(sample.method(1), expected=2)
assert SampleClass.__dict__['method'] is original
def test_classmethod(self):
class SampleClass:
@classmethod
def method(cls, x):
return x*2
original = SampleClass.__dict__['method']
with Replacer() as replace:
replace.on_class(SampleClass.method, classmethod(lambda cls, x: x*3))
compare(SampleClass.method(1), expected=3)
compare(SampleClass.method(1), expected=2)
assert SampleClass.__dict__['method'] is original
def test_staticmethod(self):
class SampleClass:
@staticmethod
def method(x):
return x*2
original = SampleClass.__dict__['method']
with Replacer() as replace:
replace.on_class(SampleClass.method, lambda x: x*3)
compare(SampleClass.method(1), expected=3)
compare(SampleClass.method(1), expected=2)
assert SampleClass.__dict__['method'] is original
def test_not_callable(self):
class SampleClass:
FOO = 1
sample = SampleClass()
replace = Replacer()
with ShouldRaise(TypeError('attribute must be callable')):
replace.on_class(SampleClass.FOO, 2)
compare(sample.FOO, expected=1)
def test_method_on_class_in_module(self):
sample = X()
original = X.__dict__['y']
with Replacer() as replace:
replace.on_class(X.y, lambda self_: 'replacement y')
compare(sample.y(), expected='replacement y')
compare(sample.y(), expected='original y')
assert X.__dict__['y'] is original
def test_method_on_instance_in_module(self):
sample = X()
original = X.__dict__['y']
with Replacer() as replace:
replace(sample.y, lambda: 'replacement y', container=sample, strict=False)
compare(sample.y(), expected='replacement y')
compare(sample.y(), expected='original y')
assert X.__dict__['y'] is original
def test_classmethod_on_class_in_module(self):
original = X.__dict__['aMethod']
with Replacer() as replace:
replace.on_class(X.aMethod, classmethod(lambda cls: (cls, cls)))
compare(X.aMethod(), expected=(X, X))
compare(X.aMethod(), expected=X)
assert X.__dict__['aMethod'] is original
def test_classmethod_on_instance_in_module(self):
sample = X()
original = X.__dict__['aMethod']
with Replacer() as replace:
replace.on_class(sample.aMethod, classmethod(lambda cls: (cls, cls)))
compare(sample.aMethod(), expected=(X, X))
compare(sample.aMethod(), expected=X)
assert X.__dict__['aMethod'] is original
def test_staticmethod_on_class_in_module(self):
original = X.__dict__['bMethod']
with Replacer() as replace:
replace.on_class(X.bMethod, lambda: 3)
compare(X.bMethod(), expected=3)
compare(X.bMethod(), expected=2)
assert X.__dict__['bMethod'] is original
def test_staticmethod_on_instance_in_module(self):
original = X.__dict__['bMethod']
sample = X()
with Replacer() as replace:
replace(sample.bMethod, lambda: 3, container=sample, strict=False)
compare(sample.bMethod(), expected=3)
compare(X.bMethod(), expected=2)
assert X.__dict__['bMethod'] is original
class TestInModule:
def test_function_guess_module(self):
with Replacer() as replace:
replace.in_module(z, lambda: 'all new z')
from .sample1 import z as sample1_z
from .sample3 import z as sample3_z
compare(sample1_z(), expected='all new z')
compare(sample3_z(), expected='original z')
from .sample1 import z as sample1_z
from .sample3 import z as sample3_z
compare(sample1_z(), expected='original z')
compare(sample3_z(), expected='original z')
def test_function_explict_module(self):
with Replacer() as replace:
replace.in_module(z, lambda: 'all new z', module=sample3)
from .sample1 import z as sample1_z
from .sample3 import z as sample3_z
compare(sample1_z(), expected='original z')
compare(sample3_z(), expected='all new z')
from .sample1 import z as sample1_z
from .sample3 import z as sample3_z
compare(sample1_z(), expected='original z')
compare(sample3_z(), expected='original z')
def test_constant(self):
replace = Replacer()
with ShouldRaise(AttributeError("'int' object has no attribute '__module__'")):
replace.in_module(SOME_CONSTANT, 43)
from .sample3 import SOME_CONSTANT as sample3_some_constant
compare(sample3_some_constant, expected=42)
class TestConvenience:
def test_environ(self):
os.environ['TESTFIXTURES_SAMPLE_KEY_PRESENT'] = 'ORIGINAL'
with replace_in_environ('TESTFIXTURES_SAMPLE_KEY_PRESENT', 'NEW'):
compare(os.environ['TESTFIXTURES_SAMPLE_KEY_PRESENT'], expected='NEW')
compare(os.environ['TESTFIXTURES_SAMPLE_KEY_PRESENT'], expected='ORIGINAL')
def test_on_class(self):
class SampleClass:
def method(self, x):
return x*2
sample = SampleClass()
with replace_on_class(SampleClass.method, lambda self, x: x*3, name='method'):
compare(sample.method(1), expected=3)
compare(sample.method(1), expected=2)
def test_in_module(self):
with replace_in_module(z, lambda: 'all new z', module=sample3):
from .sample1 import z as sample1_z
from .sample3 import z as sample3_z
compare(sample1_z(), expected='original z')
compare(sample3_z(), expected='all new z')
from .sample1 import z as sample1_z
from .sample3 import z as sample3_z
compare(sample1_z(), expected='original z')
compare(sample3_z(), expected='original z')
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