freeipa/ipalib/tests/test_plugable.py

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# Authors:
# Jason Gerard DeRose <jderose@redhat.com>
#
# Copyright (C) 2008 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 only
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
Unit tests for `ipalib.plugable` module.
"""
from tstutil import raises, getitem, no_set, no_del, read_only
from tstutil import ClassChecker
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from ipalib import plugable, errors
def test_valid_identifier():
"""
Test the `valid_identifier` function.
"""
f = plugable.check_identifier
okay = [
'user_add',
'stuff2junk',
'sixty9',
]
nope = [
'_user_add',
'__user_add',
'user_add_',
'user_add__',
'_user_add_',
'__user_add__',
'60nine',
]
for name in okay:
f(name)
for name in nope:
raises(errors.NameSpaceError, f, name)
for name in okay:
raises(errors.NameSpaceError, f, name.upper())
class test_ReadOnly(ClassChecker):
"""
Test the `ReadOnly` class
"""
_cls = plugable.ReadOnly
def test_class(self):
assert self.cls.__bases__ == (object,)
assert callable(self.cls.__lock__)
assert callable(self.cls.__islocked__)
def test_lock(self):
"""
Tests the `__lock__` and `__islocked__` methods.
"""
o = self.cls()
assert o.__islocked__() is False
o.__lock__()
assert o.__islocked__() is True
raises(AssertionError, o.__lock__) # Can only be locked once
assert o.__islocked__() is True # This should still be True
def test_when_unlocked(self):
"""
Test that default state is unlocked, that setting and deleting
attributes works.
"""
o = self.cls()
# Setting:
o.hello = 'world'
assert o.hello == 'world'
# Deleting:
del o.hello
assert not hasattr(o, 'hello')
def test_when_locked(self):
"""
Test that after __lock__() has been called, setting or deleting an
attribute raises AttributeError.
"""
obj = self.cls()
obj.__lock__()
names = ['not_an_attribute', 'an_attribute']
for name in names:
no_set(obj, name)
no_del(obj, name)
class some_ro_class(self.cls):
def __init__(self):
self.an_attribute = 'Hello world!'
self.__lock__()
obj = some_ro_class()
for name in names:
no_set(obj, name)
no_del(obj, name)
assert read_only(obj, 'an_attribute') == 'Hello world!'
class test_ProxyTarget(ClassChecker):
"""
Test the `ProxyTarget` class.
"""
_cls = plugable.ProxyTarget
def test_class(self):
assert self.cls.__bases__ == (plugable.ReadOnly,)
assert type(self.cls.name) is property
assert self.cls.implements(frozenset())
def test_name(self):
"""
Tests the `name` property.
"""
assert read_only(self.cls(), 'name') == 'ProxyTarget'
class some_subclass(self.cls):
pass
assert read_only(some_subclass(), 'name') == 'some_subclass'
def test_doc(self):
"""
Tests the `doc` property.
"""
class some_subclass(self.cls):
'here is the doc string'
assert read_only(some_subclass(), 'doc') == 'here is the doc string'
def test_implements(self):
"""
Tests the `implements` classmethod.
"""
class example(self.cls):
__public__ = frozenset((
'some_method',
'some_property',
))
class superset(self.cls):
__public__ = frozenset((
'some_method',
'some_property',
'another_property',
))
class subset(self.cls):
__public__ = frozenset((
'some_property',
))
class any_object(object):
__public__ = frozenset((
'some_method',
'some_property',
))
for ex in (example, example()):
# Test using str:
assert ex.implements('some_method')
assert not ex.implements('another_method')
# Test using frozenset:
assert ex.implements(frozenset(['some_method']))
assert not ex.implements(
frozenset(['some_method', 'another_method'])
)
# Test using another object/class with __public__ frozenset:
assert ex.implements(example)
assert ex.implements(example())
assert ex.implements(subset)
assert not subset.implements(ex)
assert not ex.implements(superset)
assert superset.implements(ex)
assert ex.implements(any_object)
assert ex.implements(any_object())
def test_implemented_by(self):
"""
Tests the `implemented_by` classmethod.
"""
class base(self.cls):
__public__ = frozenset((
'attr0',
'attr1',
'attr2',
))
class okay(base):
def attr0(self):
pass
def __get_attr1(self):
assert False # Make sure property isn't accesed on instance
attr1 = property(__get_attr1)
attr2 = 'hello world'
another_attr = 'whatever'
class fail(base):
def __init__(self):
# Check that class, not instance is inspected:
self.attr2 = 'hello world'
def attr0(self):
pass
def __get_attr1(self):
assert False # Make sure property isn't accesed on instance
attr1 = property(__get_attr1)
another_attr = 'whatever'
# Test that AssertionError is raised trying to pass something not
# subclass nor instance of base:
raises(AssertionError, base.implemented_by, object)
# Test on subclass with needed attributes:
assert base.implemented_by(okay) is True
assert base.implemented_by(okay()) is True
# Test on subclass *without* needed attributes:
assert base.implemented_by(fail) is False
assert base.implemented_by(fail()) is False
class test_Proxy(ClassChecker):
"""
Tests the `Proxy` class.
"""
_cls = plugable.Proxy
def test_class(self):
assert self.cls.__bases__ == (plugable.ReadOnly,)
def test_proxy(self):
# Setup:
class base(object):
__public__ = frozenset((
'public_0',
'public_1',
'__call__',
))
def public_0(self):
return 'public_0'
def public_1(self):
return 'public_1'
def __call__(self, caller):
return 'ya called it, %s.' % caller
def private_0(self):
return 'private_0'
def private_1(self):
return 'private_1'
class plugin(base):
name = 'user_add'
attr_name = 'add'
doc = 'add a new user'
# Test that TypeError is raised when base is not a class:
raises(TypeError, self.cls, base(), None)
# Test that ValueError is raised when target is not instance of base:
raises(ValueError, self.cls, base, object())
# Test with correct arguments:
i = plugin()
p = self.cls(base, i)
assert read_only(p, 'name') is plugin.name
assert read_only(p, 'doc') == plugin.doc
assert list(p) == sorted(base.__public__)
# Test normal methods:
for n in xrange(2):
pub = 'public_%d' % n
priv = 'private_%d' % n
assert getattr(i, pub)() == pub
assert getattr(p, pub)() == pub
assert hasattr(p, pub)
assert getattr(i, priv)() == priv
assert not hasattr(p, priv)
# Test __call__:
value = 'ya called it, dude.'
assert i('dude') == value
assert p('dude') == value
assert callable(p)
# Test name_attr='name' kw arg
i = plugin()
p = self.cls(base, i, 'attr_name')
assert read_only(p, 'name') == 'add'
def test_implements(self):
"""
Tests the `implements` method.
"""
class base(object):
__public__ = frozenset()
name = 'base'
doc = 'doc'
@classmethod
def implements(cls, arg):
return arg + 7
class sub(base):
@classmethod
def implements(cls, arg):
"""
Defined to make sure base.implements() is called, not
target.implements()
"""
return arg
o = sub()
p = self.cls(base, o)
assert p.implements(3) == 10
def test_clone(self):
"""
Tests the `__clone__` method.
"""
class base(object):
__public__ = frozenset()
class sub(base):
name = 'some_name'
doc = 'doc'
label = 'another_name'
p = self.cls(base, sub())
assert read_only(p, 'name') == 'some_name'
c = p.__clone__('label')
assert isinstance(c, self.cls)
assert c is not p
assert read_only(c, 'name') == 'another_name'
class test_Plugin(ClassChecker):
"""
Tests the `Plugin` class.
"""
_cls = plugable.Plugin
def test_class(self):
assert self.cls.__bases__ == (plugable.ProxyTarget,)
assert type(self.cls.api) is property
def test_finalize(self):
"""
Tests the `finalize` method.
"""
api = 'the api instance'
o = self.cls()
assert read_only(o, 'name') == 'Plugin'
assert repr(o) == '%s.Plugin()' % plugable.__name__
assert read_only(o, 'api') is None
raises(AssertionError, o.finalize, None)
o.finalize(api)
assert read_only(o, 'api') is api
raises(AssertionError, o.finalize, api)
class some_plugin(self.cls):
pass
sub = some_plugin()
assert read_only(sub, 'name') == 'some_plugin'
assert repr(sub) == '%s.some_plugin()' % __name__
assert read_only(sub, 'api') is None
raises(AssertionError, sub.finalize, None)
sub.finalize(api)
assert read_only(sub, 'api') is api
raises(AssertionError, sub.finalize, api)
class test_NameSpace(ClassChecker):
"""
Tests the `NameSpace` class.
"""
_cls = plugable.NameSpace
def test_class(self):
assert self.cls.__bases__ == (plugable.ReadOnly,)
def test_namespace(self):
class base(object):
__public__ = frozenset((
'plusplus',
))
doc = 'doc'
def plusplus(self, n):
return n + 1
class plugin(base):
def __init__(self, name):
self.name = name
def get_name(i):
return 'noun_verb%d' % i
def get_proxies(n):
for i in xrange(n):
yield plugable.Proxy(base, plugin(get_name(i)))
cnt = 20
ns = self.cls(get_proxies(cnt))
assert ns.__islocked__() is True
# Test __len__
assert len(ns) == cnt
# Test __iter__
i = None
for (i, proxy) in enumerate(ns):
assert type(proxy) is plugable.Proxy
assert proxy.name == get_name(i)
assert i == cnt - 1
# Test __contains__, __getitem__, getattr():
proxies = frozenset(ns)
for i in xrange(cnt):
name = get_name(i)
assert name in ns
proxy = ns[name]
assert proxy.name == name
assert type(proxy) is plugable.Proxy
assert proxy in proxies
assert read_only(ns, name) is proxy
# Test dir():
assert set(get_name(i) for i in xrange(cnt)).issubset(dir(ns))
# Test that KeyError, AttributeError is raised:
name = get_name(cnt)
assert name not in ns
raises(KeyError, getitem, ns, name)
raises(AttributeError, getattr, ns, name)
no_set(ns, name)
def test_Registrar():
class Base1(object):
pass
class Base2(object):
pass
class Base3(object):
pass
class plugin1(Base1):
pass
class plugin2(Base2):
pass
class plugin3(Base3):
pass
# Test creation of Registrar:
r = plugable.Registrar(Base1, Base2)
# Test __hasitem__, __getitem__:
for base in [Base1, Base2]:
assert base in r
assert base.__name__ in r
assert r[base] == {}
assert r[base.__name__] == {}
# Check that TypeError is raised trying to register something that isn't
# a class:
raises(TypeError, r, plugin1())
# Check that SubclassError is raised trying to register a class that is
# not a subclass of an allowed base:
raises(errors.SubclassError, r, plugin3)
# Check that registration works
r(plugin1)
sub_d = r['Base1']
assert len(sub_d) == 1
assert sub_d['plugin1'] is plugin1
# Check that a copy is returned
assert sub_d is not r['Base1']
assert sub_d == r['Base1']
# Check that DuplicateError is raised trying to register exact class
# again:
raises(errors.DuplicateError, r, plugin1)
# Check that OverrideError is raised trying to register class with same
# name and same base:
orig1 = plugin1
class base1_extended(Base1):
pass
class plugin1(base1_extended):
pass
raises(errors.OverrideError, r, plugin1)
# Check that overriding works
r(plugin1, override=True)
sub_d = r['Base1']
assert len(sub_d) == 1
assert sub_d['plugin1'] is plugin1
assert sub_d['plugin1'] is not orig1
# Check that MissingOverrideError is raised trying to override a name
# not yet registerd:
raises(errors.MissingOverrideError, r, plugin2, override=True)
# Check that additional plugin can be registered:
r(plugin2)
sub_d = r['Base2']
assert len(sub_d) == 1
assert sub_d['plugin2'] is plugin2
# Setup to test __iter__:
class plugin1a(Base1):
pass
r(plugin1a)
class plugin1b(Base1):
pass
r(plugin1b)
class plugin2a(Base2):
pass
r(plugin2a)
class plugin2b(Base2):
pass
r(plugin2b)
m = {
'Base1': set([plugin1, plugin1a, plugin1b]),
'Base2': set([plugin2, plugin2a, plugin2b]),
}
# Now test __iter__:
for (base, plugins) in r:
assert base in [Base1, Base2]
assert set(plugins) == m[base.__name__]
assert len(list(r)) == 2
# Again test __hasitem__, __getitem__:
for base in [Base1, Base2]:
assert base in r
assert base.__name__ in r
d = dict((p.__name__, p) for p in m[base.__name__])
assert len(d) == 3
assert r[base] == d
assert r[base.__name__] == d
def test_API():
assert issubclass(plugable.API, plugable.ReadOnly)
# Setup the test bases, create the API:
class base0(plugable.Plugin):
__public__ = frozenset((
'method',
))
def method(self, n):
return n
class base1(plugable.Plugin):
__public__ = frozenset((
'method',
))
def method(self, n):
return n + 1
api = plugable.API(base0, base1)
r = api.register
assert isinstance(r, plugable.Registrar)
assert read_only(api, 'register') is r
class base0_plugin0(base0):
pass
r(base0_plugin0)
class base0_plugin1(base0):
pass
r(base0_plugin1)
class base0_plugin2(base0):
pass
r(base0_plugin2)
class base1_plugin0(base1):
pass
r(base1_plugin0)
class base1_plugin1(base1):
pass
r(base1_plugin1)
class base1_plugin2(base1):
pass
r(base1_plugin2)
# Test API instance:
api.finalize()
def get_base(b):
return 'base%d' % b
def get_plugin(b, p):
return 'base%d_plugin%d' % (b, p)
for b in xrange(2):
base_name = get_base(b)
ns = getattr(api, base_name)
assert isinstance(ns, plugable.NameSpace)
assert read_only(api, base_name) is ns
assert len(ns) == 3
for p in xrange(3):
plugin_name = get_plugin(b, p)
proxy = ns[plugin_name]
assert isinstance(proxy, plugable.Proxy)
assert proxy.name == plugin_name
assert read_only(ns, plugin_name) is proxy
assert read_only(proxy, 'method')(7) == 7 + b
# Test that calling finilize again raises AssertionError:
raises(AssertionError, api.finalize)