Added basic tests of copy_reg's extension registry.

This commit is contained in:
Tim Peters 2003-02-04 17:49:36 +00:00
parent 5e61e24d55
commit dbaba0d05a
1 changed files with 78 additions and 0 deletions

View File

@ -7,6 +7,27 @@ class C:
pass
class ExtensionSaver:
# Remember current registration for code (if any), and remove it (if
# there is one).
def __init__(self, code):
self.code = code
if code in copy_reg._inverted_registry:
self.pair = copy_reg._inverted_registry[code]
copy_reg.remove_extension(self.pair[0], self.pair[1], code)
else:
self.pair = None
# Restore previous registration for code.
def restore(self):
code = self.code
curpair = copy_reg._inverted_registry.get(code)
if curpair is not None:
copy_reg.remove_extension(curpair[0], curpair[1], code)
pair = self.pair
if pair is not None:
copy_reg.add_extension(pair[0], pair[1], code)
class CopyRegTestCase(unittest.TestCase):
def test_class(self):
@ -25,6 +46,63 @@ class CopyRegTestCase(unittest.TestCase):
import copy
self.assertEquals(True, copy.copy(True))
def test_extension_registry(self):
mod, func, code = 'junk1 ', ' junk2', 0xabcd
e = ExtensionSaver(code)
try:
# Shouldn't be in registry now.
self.assertRaises(ValueError, copy_reg.remove_extension,
mod, func, code)
copy_reg.add_extension(mod, func, code)
# Should be in the registry.
self.assert_(copy_reg._extension_registry[mod, func] == code)
self.assert_(copy_reg._inverted_registry[code] == (mod, func))
# Shouldn't be in the cache.
self.assert_(code not in copy_reg._extension_cache)
# Redundant registration should be OK.
copy_reg.add_extension(mod, func, code) # shouldn't blow up
# Conflicting code.
self.assertRaises(ValueError, copy_reg.add_extension,
mod, func, code + 1)
self.assertRaises(ValueError, copy_reg.remove_extension,
mod, func, code + 1)
# Conflicting module name.
self.assertRaises(ValueError, copy_reg.add_extension,
mod[1:], func, code )
self.assertRaises(ValueError, copy_reg.remove_extension,
mod[1:], func, code )
# Conflicting function name.
self.assertRaises(ValueError, copy_reg.add_extension,
mod, func[1:], code)
self.assertRaises(ValueError, copy_reg.remove_extension,
mod, func[1:], code)
# Can't remove one that isn't registered at all.
if code + 1 not in copy_reg._inverted_registry:
self.assertRaises(ValueError, copy_reg.remove_extension,
mod[1:], func[1:], code + 1)
finally:
e.restore()
# Shouldn't be there anymore.
self.assert_((mod, func) not in copy_reg._extension_registry)
# The code *may* be in copy_reg._extension_registry, though, if
# we happened to pick on a registered code. So don't check for
# that.
# Check valid codes at the limits.
for code in 1, 0x7fffffff:
e = ExtensionSaver(code)
try:
copy_reg.add_extension(mod, func, code)
copy_reg.remove_extension(mod, func, code)
finally:
e.restore()
# Ensure invalid codes blow up.
for code in -1, 0, 0x80000000L:
self.assertRaises(ValueError, copy_reg.add_extension,
mod, func, code)
def test_main():
test_support.run_unittest(CopyRegTestCase)