Fix Python 3 issues in nova.utils and nova.tests
* Fix sort(): dictionaries are no more comparable on Python 3, use a key function building a sorted list of the dictionary items * Replace __builtin__ with six.moves.builtins * get_hash_str() now accepts Unicode: Unicode is encoded to UTF-8 before hashing the string. Mention also the hash method (MD5) in the docstring. * LastBytesTestCase: use binary files instead of text files. Use also a context manager on the TemporaryFile to ensure that the temporary file is closed (even on error). * Functions: use the __code__ attribute instead of func_code, and __closure__ instead of func_closure. These attributes are also available on Python 2.6. * Replace unichr() with six.unichr() * SafeTruncateTestCase(): write directly the chinese Unicode character instead of using safe_decode() (which is not reliable, it depends on the locale encoding!) * sanitize_hostname(): On Python 3, decode the hostname from Latin1 to get back Unicode. Add also a comment explaining the purpose of the conversion to Latin1. * last_bytes(): replace the hardcoded constant 22 with errno.EINVAL and add a comment explaining how the function works. * tox.ini: add nova.tests.unit.test_utils to Python 3.4 Blueprint nova-python3 Change-Id: I96d9b0581ceaeccf9c35e0c9bada369e9d19fd15
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22
nova/test.py
22
nova/test.py
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@ -294,16 +294,14 @@ class TestCase(testtools.TestCase):
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if isinstance(observed, six.string_types):
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observed = jsonutils.loads(observed)
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def sort(what):
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def get_key(item):
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if isinstance(item, (datetime.datetime, set)):
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return str(item)
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if six.PY3 and isinstance(item, dict):
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return str(sort(list(six.iterkeys(item)) +
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list(six.itervalues(item))))
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return str(item) if six.PY3 else item
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return sorted(what, key=get_key)
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def sort_key(x):
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if isinstance(x, set) or isinstance(x, datetime.datetime):
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return str(x)
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if isinstance(x, dict):
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items = ((sort_key(key), sort_key(value))
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for key, value in x.items())
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return sorted(items)
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return x
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def inner(expected, observed):
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if isinstance(expected, dict) and isinstance(observed, dict):
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@ -318,8 +316,8 @@ class TestCase(testtools.TestCase):
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isinstance(observed, (list, tuple, set))):
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self.assertEqual(len(expected), len(observed))
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expected_values_iter = iter(sort(expected))
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observed_values_iter = iter(sort(observed))
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expected_values_iter = iter(sorted(expected, key=sort_key))
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observed_values_iter = iter(sorted(observed, key=sort_key))
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for i in range(len(expected)):
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inner(next(expected_values_iter),
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@ -19,7 +19,6 @@ import importlib
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import os
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import os.path
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import socket
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import StringIO
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import struct
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import tempfile
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@ -112,7 +111,7 @@ class GenericUtilsTestCase(test.NoDBTestCase):
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fake_contents = "lorem ipsum"
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m = mock.mock_open(read_data=fake_contents)
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with mock.patch("__builtin__.open", m, create=True):
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with mock.patch("six.moves.builtins.open", m, create=True):
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cache_data = {"data": 1123, "mtime": 1}
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self.reload_called = False
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@ -209,10 +208,13 @@ class GenericUtilsTestCase(test.NoDBTestCase):
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self.assertEqual("localhost", utils.safe_ip_format("localhost"))
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def test_get_hash_str(self):
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base_str = "foo"
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base_str = b"foo"
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base_unicode = u"foo"
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value = hashlib.md5(base_str).hexdigest()
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self.assertEqual(
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value, utils.get_hash_str(base_str))
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self.assertEqual(
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value, utils.get_hash_str(base_unicode))
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def test_use_rootwrap(self):
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self.flags(disable_rootwrap=False, group='workarounds')
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@ -554,24 +556,24 @@ class LastBytesTestCase(test.NoDBTestCase):
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def setUp(self):
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super(LastBytesTestCase, self).setUp()
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self.f = StringIO.StringIO('1234567890')
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self.f = six.BytesIO(b'1234567890')
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def test_truncated(self):
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self.f.seek(0, os.SEEK_SET)
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out, remaining = utils.last_bytes(self.f, 5)
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self.assertEqual(out, '67890')
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self.assertEqual(out, b'67890')
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self.assertTrue(remaining > 0)
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def test_read_all(self):
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self.f.seek(0, os.SEEK_SET)
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out, remaining = utils.last_bytes(self.f, 1000)
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self.assertEqual(out, '1234567890')
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self.assertEqual(out, b'1234567890')
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self.assertFalse(remaining > 0)
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def test_seek_too_far_real_file(self):
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# StringIO doesn't raise IOError if you see past the start of the file.
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flo = tempfile.TemporaryFile()
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content = '1234567890'
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with tempfile.TemporaryFile() as flo:
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content = b'1234567890'
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flo.write(content)
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self.assertEqual((content, 0), utils.last_bytes(flo, 1000))
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@ -587,11 +589,14 @@ class MetadataToDictTestCase(test.NoDBTestCase):
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self.assertEqual(utils.metadata_to_dict([]), {})
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def test_dict_to_metadata(self):
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def sort_key(adict):
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return sorted(adict.items())
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metadata = utils.dict_to_metadata(dict(foo1='bar1', foo2='bar2'))
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expected = [{'key': 'foo1', 'value': 'bar1'},
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{'key': 'foo2', 'value': 'bar2'}]
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self.assertEqual(sorted(utils.dict_to_metadata(dict(foo1='bar1',
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foo2='bar2'))),
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sorted(expected))
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self.assertEqual(sorted(metadata, key=sort_key),
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sorted(expected, key=sort_key))
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def test_dict_to_metadata_empty(self):
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self.assertEqual(utils.dict_to_metadata({}), [])
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@ -612,7 +617,7 @@ class WrappedCodeTestCase(test.NoDBTestCase):
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pass
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func = utils.get_wrapped_function(wrapped)
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func_code = func.func_code
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func_code = func.__code__
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self.assertEqual(4, len(func_code.co_varnames))
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self.assertIn('self', func_code.co_varnames)
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self.assertIn('instance', func_code.co_varnames)
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@ -626,7 +631,7 @@ class WrappedCodeTestCase(test.NoDBTestCase):
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pass
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func = utils.get_wrapped_function(wrapped)
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func_code = func.func_code
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func_code = func.__code__
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self.assertEqual(4, len(func_code.co_varnames))
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self.assertIn('self', func_code.co_varnames)
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self.assertIn('instance', func_code.co_varnames)
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@ -641,7 +646,7 @@ class WrappedCodeTestCase(test.NoDBTestCase):
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pass
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func = utils.get_wrapped_function(wrapped)
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func_code = func.func_code
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func_code = func.__code__
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self.assertEqual(4, len(func_code.co_varnames))
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self.assertIn('self', func_code.co_varnames)
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self.assertIn('instance', func_code.co_varnames)
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@ -759,7 +764,7 @@ class ValidateIntegerTestCase(test.NoDBTestCase):
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max_value=54)
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self.assertRaises(exception.InvalidInput,
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utils.validate_integer,
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unichr(129), "UnicodeError",
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six.unichr(129), "UnicodeError",
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max_value=1000)
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@ -1050,7 +1055,7 @@ class SafeTruncateTestCase(test.NoDBTestCase):
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# Generate Chinese byte string whose length is 300. This Chinese UTF-8
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# character occupies 3 bytes. After truncating, the byte string length
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# should be 255.
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msg = encodeutils.safe_decode('\xe8\xb5\xb5' * 100)
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msg = u'\u8d75' * 100
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truncated_msg = utils.safe_truncate(msg, 255)
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byte_message = encodeutils.safe_encode(truncated_msg)
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self.assertEqual(255, len(byte_message))
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@ -19,6 +19,7 @@
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import contextlib
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import datetime
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import errno
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import functools
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import hashlib
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import hmac
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@ -565,6 +566,12 @@ def monkey_patch():
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# If CONF.monkey_patch is not True, this function do nothing.
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if not CONF.monkey_patch:
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return
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if six.PY3:
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def is_method(obj):
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# Unbound methods became regular functions on Python 3
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return inspect.ismethod(obj) or inspect.isfunction(obj)
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else:
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is_method = inspect.ismethod
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# Get list of modules and decorators
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for module_and_decorator in CONF.monkey_patch_modules:
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module, decorator_name = module_and_decorator.split(':')
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@ -573,15 +580,15 @@ def monkey_patch():
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__import__(module)
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# Retrieve module information using pyclbr
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module_data = pyclbr.readmodule_ex(module)
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for key in module_data.keys():
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for key, value in module_data.items():
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# set the decorator for the class methods
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if isinstance(module_data[key], pyclbr.Class):
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if isinstance(value, pyclbr.Class):
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clz = importutils.import_class("%s.%s" % (module, key))
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for method, func in inspect.getmembers(clz, inspect.ismethod):
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for method, func in inspect.getmembers(clz, is_method):
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setattr(clz, method,
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decorator("%s.%s.%s" % (module, key, method), func))
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# set the decorator for the function
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if isinstance(module_data[key], pyclbr.Function):
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if isinstance(value, pyclbr.Function):
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func = importutils.import_class("%s.%s" % (module, key))
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setattr(sys.modules[module], key,
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decorator("%s.%s" % (module, key), func))
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@ -614,7 +621,10 @@ def make_dev_path(dev, partition=None, base='/dev'):
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def sanitize_hostname(hostname):
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"""Return a hostname which conforms to RFC-952 and RFC-1123 specs."""
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if isinstance(hostname, six.text_type):
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# Remove characters outside the Unicode range U+0000-U+00FF
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hostname = hostname.encode('latin-1', 'ignore')
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if six.PY3:
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hostname = hostname.decode('latin-1')
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hostname = re.sub('[ _]', '-', hostname)
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hostname = re.sub('[^\w.-]+', '', hostname)
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try:
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file_like_object.seek(-num, os.SEEK_END)
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except IOError as e:
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if e.errno == 22:
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# seek() fails with EINVAL when trying to go before the start of the
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# file. It means that num is larger than the file size, so just
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# go to the start.
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if e.errno == errno.EINVAL:
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file_like_object.seek(0, os.SEEK_SET)
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else:
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raise
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@ -874,14 +887,14 @@ def instance_sys_meta(instance):
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def get_wrapped_function(function):
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"""Get the method at the bottom of a stack of decorators."""
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if not hasattr(function, 'func_closure') or not function.func_closure:
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if not hasattr(function, '__closure__') or not function.__closure__:
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return function
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def _get_wrapped_function(function):
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if not hasattr(function, 'func_closure') or not function.func_closure:
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if not hasattr(function, '__closure__') or not function.__closure__:
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return None
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for closure in function.func_closure:
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for closure in function.__closure__:
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func = closure.cell_contents
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deeper_func = _get_wrapped_function(func)
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def get_hash_str(base_str):
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"""returns string that represents hash of base_str (in hex format)."""
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"""Returns string that represents MD5 hash of base_str (in hex format).
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If base_str is a Unicode string, encode it to UTF-8.
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"""
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if isinstance(base_str, six.text_type):
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base_str = base_str.encode('utf-8')
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return hashlib.md5(base_str).hexdigest()
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if hasattr(hmac, 'compare_digest'):
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