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# ----------------------------------------------------------------------------
# Copyright (c) 2013--, scikit-bio development team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE.txt, distributed with this software.
# ----------------------------------------------------------------------------
import unittest
import inspect
import warnings
from skbio.util import classproperty
from skbio.util._decorator import overrides, classonlymethod
from skbio.util._exception import OverrideError
class TestClassOnlyMethod(unittest.TestCase):
def test_works_on_class(self):
class A:
@classonlymethod
def example(cls):
return cls
self.assertEqual(A.example(), A)
def test_fails_on_instance(self):
class A:
@classonlymethod
def example(cls):
pass
with self.assertRaises(TypeError) as e:
A().example()
self.assertIn('A.example', str(e.exception))
self.assertIn('instance', str(e.exception))
def test_matches_classmethod(self):
class A:
pass
def example(cls, thing):
"""doc"""
A.example1 = classmethod(example)
A.example2 = classonlymethod(example)
self.assertEqual(A.__dict__['example1'].__func__, example)
self.assertEqual(A.__dict__['example2'].__func__, example)
self.assertEqual(A.example1.__doc__, example.__doc__)
self.assertEqual(A.example2.__doc__, example.__doc__)
self.assertEqual(A.example1.__name__, example.__name__)
self.assertEqual(A.example2.__name__, example.__name__)
def test_passes_args_kwargs(self):
self.ran_test = False
class A:
@classonlymethod
def example(cls, arg1, arg2, kwarg1=None, kwarg2=None,
default=5):
self.assertEqual(arg1, 1)
self.assertEqual(arg2, 2)
self.assertEqual(kwarg1, '1')
self.assertEqual(kwarg2, '2')
self.assertEqual(default, 5)
self.ran_test = True
A.example(1, *[2], kwarg2='2', **{'kwarg1': '1'})
self.assertTrue(self.ran_test)
class TestOverrides(unittest.TestCase):
def test_raises_when_missing(self):
class A:
pass
with self.assertRaises(OverrideError):
class B(A):
@overrides(A)
def test(self):
pass
def test_doc_inherited(self):
class A:
def test(self):
"""Docstring"""
pass
class B(A):
@overrides(A)
def test(self):
pass
self.assertEqual(B.test.__doc__, "Docstring")
def test_doc_not_inherited(self):
class A:
def test(self):
"""Docstring"""
pass
class B(A):
@overrides(A)
def test(self):
"""Different"""
pass
self.assertEqual(B.test.__doc__, "Different")
class TestClassProperty(unittest.TestCase):
def test_getter_only(self):
class Foo:
_foo = 42
@classproperty
def foo(cls):
return cls._foo
# class-level getter
self.assertEqual(Foo.foo, 42)
# instance-level getter
f = Foo()
self.assertEqual(f.foo, 42)
with self.assertRaises(AttributeError):
f.foo = 4242
if __name__ == '__main__':
unittest.main()
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