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test_inspection.py
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283 lines (211 loc) · 8.61 KB
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# -*- coding: utf-8 -*-
import os
from bpython._py3compat import py3
from bpython import inspection
from bpython.test import unittest
from bpython.test.fodder import encoding_ascii
from bpython.test.fodder import encoding_latin1
from bpython.test.fodder import encoding_utf8
foo_ascii_only = u'''def foo():
"""Test"""
pass
'''
foo_non_ascii = u'''def foo():
"""Test äöü"""
pass
'''
class OldCallable:
def __call__(self):
pass
class Callable(object):
def __call__(self):
pass
class OldNoncallable:
pass
class Noncallable(object):
pass
def spam():
pass
class CallableMethod(object):
def method(self):
pass
class TestInspection(unittest.TestCase):
def test_is_callable(self):
self.assertTrue(inspection.is_callable(spam))
self.assertTrue(inspection.is_callable(Callable))
self.assertTrue(inspection.is_callable(Callable()))
self.assertTrue(inspection.is_callable(OldCallable))
self.assertTrue(inspection.is_callable(OldCallable()))
self.assertFalse(inspection.is_callable(Noncallable()))
self.assertFalse(inspection.is_callable(OldNoncallable()))
self.assertFalse(inspection.is_callable(None))
self.assertTrue(inspection.is_callable(CallableMethod().method))
@unittest.skipIf(py3, "old-style classes only exist in Python 2")
def test_is_new_style_py2(self):
self.assertTrue(inspection.is_new_style(spam))
self.assertTrue(inspection.is_new_style(Noncallable))
self.assertFalse(inspection.is_new_style(OldNoncallable))
self.assertTrue(inspection.is_new_style(Noncallable()))
self.assertFalse(inspection.is_new_style(OldNoncallable()))
self.assertTrue(inspection.is_new_style(None))
@unittest.skipUnless(py3, "only in Python 3 are all classes new-style")
def test_is_new_style_py3(self):
self.assertTrue(inspection.is_new_style(spam))
self.assertTrue(inspection.is_new_style(Noncallable))
self.assertTrue(inspection.is_new_style(OldNoncallable))
self.assertTrue(inspection.is_new_style(Noncallable()))
self.assertTrue(inspection.is_new_style(OldNoncallable()))
self.assertTrue(inspection.is_new_style(None))
def test_parsekeywordpairs(self):
# See issue #109
def fails(spam=["-a", "-b"]):
pass
default_arg_repr = "['-a', '-b']"
self.assertEqual(
str(["-a", "-b"]),
default_arg_repr,
"This test is broken (repr does not match), fix me.",
)
argspec = inspection.getfuncprops("fails", fails)
defaults = argspec.argspec.defaults
self.assertEqual(str(defaults[0]), default_arg_repr)
def test_pasekeywordpairs_string(self):
def spam(eggs="foo, bar"):
pass
defaults = inspection.getfuncprops("spam", spam).argspec.defaults
self.assertEqual(repr(defaults[0]), "'foo, bar'")
def test_parsekeywordpairs_multiple_keywords(self):
def spam(eggs=23, foobar="yay"):
pass
defaults = inspection.getfuncprops("spam", spam).argspec.defaults
self.assertEqual(repr(defaults[0]), "23")
self.assertEqual(repr(defaults[1]), "'yay'")
def test_get_encoding_ascii(self):
self.assertEqual(inspection.get_encoding(encoding_ascii), "ascii")
self.assertEqual(inspection.get_encoding(encoding_ascii.foo), "ascii")
def test_get_encoding_latin1(self):
self.assertEqual(inspection.get_encoding(encoding_latin1), "latin1")
self.assertEqual(inspection.get_encoding(encoding_latin1.foo), "latin1")
def test_get_encoding_utf8(self):
self.assertEqual(inspection.get_encoding(encoding_utf8), "utf-8")
self.assertEqual(inspection.get_encoding(encoding_utf8.foo), "utf-8")
def test_get_source_ascii(self):
self.assertEqual(
inspection.get_source_unicode(encoding_ascii.foo), foo_ascii_only
)
def test_get_source_utf8(self):
self.assertEqual(
inspection.get_source_unicode(encoding_utf8.foo), foo_non_ascii
)
def test_get_source_latin1(self):
self.assertEqual(
inspection.get_source_unicode(encoding_latin1.foo), foo_non_ascii
)
def test_get_source_file(self):
path = os.path.join(
os.path.dirname(os.path.abspath(__file__)), "fodder"
)
encoding = inspection.get_encoding_file(
os.path.join(path, "encoding_ascii.py")
)
self.assertEqual(encoding, "ascii")
encoding = inspection.get_encoding_file(
os.path.join(path, "encoding_latin1.py")
)
self.assertEqual(encoding, "latin1")
encoding = inspection.get_encoding_file(
os.path.join(path, "encoding_utf8.py")
)
self.assertEqual(encoding, "utf-8")
class A(object):
a = "a"
class B(A):
b = "b"
class Property(object):
@property
def prop(self):
raise AssertionError("Property __get__ executed")
class Slots(object):
__slots__ = ["s1", "s2", "s3"]
if not py3:
@property
def s3(self):
raise AssertionError("Property __get__ executed")
class SlotsSubclass(Slots):
@property
def s4(self):
raise AssertionError("Property __get__ executed")
class OverriddenGetattr(object):
def __getattr__(self, attr):
raise AssertionError("custom __getattr__ executed")
a = 1
class OverriddenGetattribute(object):
def __getattribute__(self, attr):
raise AssertionError("custom __getattribute__ executed")
a = 1
class OverriddenMRO(object):
def __mro__(self):
raise AssertionError("custom mro executed")
a = 1
member_descriptor = type(Slots.s1)
class TestSafeGetAttribute(unittest.TestCase):
def test_lookup_on_object(self):
a = A()
a.x = 1
self.assertEqual(inspection.getattr_safe(a, "x"), 1)
self.assertEqual(inspection.getattr_safe(a, "a"), "a")
b = B()
b.y = 2
self.assertEqual(inspection.getattr_safe(b, "y"), 2)
self.assertEqual(inspection.getattr_safe(b, "a"), "a")
self.assertEqual(inspection.getattr_safe(b, "b"), "b")
self.assertEqual(inspection.hasattr_safe(b, "y"), True)
self.assertEqual(inspection.hasattr_safe(b, "b"), True)
def test_avoid_running_properties(self):
p = Property()
self.assertEqual(inspection.getattr_safe(p, "prop"), Property.prop)
self.assertEqual(inspection.hasattr_safe(p, "prop"), True)
def test_lookup_with_slots(self):
s = Slots()
s.s1 = "s1"
self.assertEqual(inspection.getattr_safe(s, "s1"), "s1")
with self.assertRaises(AttributeError):
inspection.getattr_safe(s, "s2")
self.assertEqual(inspection.hasattr_safe(s, "s1"), True)
self.assertEqual(inspection.hasattr_safe(s, "s2"), False)
def test_lookup_on_slots_classes(self):
sga = inspection.getattr_safe
s = SlotsSubclass()
self.assertIsInstance(sga(Slots, "s1"), member_descriptor)
self.assertIsInstance(sga(SlotsSubclass, "s1"), member_descriptor)
self.assertIsInstance(sga(SlotsSubclass, "s4"), property)
self.assertIsInstance(sga(s, "s4"), property)
self.assertEqual(inspection.hasattr_safe(s, "s1"), False)
self.assertEqual(inspection.hasattr_safe(s, "s4"), True)
@unittest.skipIf(py3, "Py 3 doesn't allow slots and prop in same class")
def test_lookup_with_property_and_slots(self):
sga = inspection.getattr_safe
s = SlotsSubclass()
self.assertIsInstance(sga(Slots, "s3"), property)
self.assertEqual(inspection.getattr_safe(s, "s3"), Slots.__dict__["s3"])
self.assertIsInstance(sga(SlotsSubclass, "s3"), property)
def test_lookup_on_overridden_methods(self):
sga = inspection.getattr_safe
self.assertEqual(sga(OverriddenGetattr(), "a"), 1)
self.assertEqual(sga(OverriddenGetattribute(), "a"), 1)
self.assertEqual(sga(OverriddenMRO(), "a"), 1)
with self.assertRaises(AttributeError):
sga(OverriddenGetattr(), "b")
with self.assertRaises(AttributeError):
sga(OverriddenGetattribute(), "b")
with self.assertRaises(AttributeError):
sga(OverriddenMRO(), "b")
self.assertEqual(
inspection.hasattr_safe(OverriddenGetattr(), "b"), False
)
self.assertEqual(
inspection.hasattr_safe(OverriddenGetattribute(), "b"), False
)
self.assertEqual(inspection.hasattr_safe(OverriddenMRO(), "b"), False)
if __name__ == "__main__":
unittest.main()