/usr/lib/python3/dist-packages/alembic/testing/assertions.py is in python3-alembic 0.9.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | from __future__ import absolute_import
import re
from .. import util
from sqlalchemy.engine import default
from ..util.compat import text_type, py3k
import contextlib
from sqlalchemy.util import decorator
from sqlalchemy import exc as sa_exc
import warnings
from . import mock
if not util.sqla_094:
def eq_(a, b, msg=None):
"""Assert a == b, with repr messaging on failure."""
assert a == b, msg or "%r != %r" % (a, b)
def ne_(a, b, msg=None):
"""Assert a != b, with repr messaging on failure."""
assert a != b, msg or "%r == %r" % (a, b)
def is_(a, b, msg=None):
"""Assert a is b, with repr messaging on failure."""
assert a is b, msg or "%r is not %r" % (a, b)
def is_not_(a, b, msg=None):
"""Assert a is not b, with repr messaging on failure."""
assert a is not b, msg or "%r is %r" % (a, b)
def assert_raises(except_cls, callable_, *args, **kw):
try:
callable_(*args, **kw)
success = False
except except_cls:
success = True
# assert outside the block so it works for AssertionError too !
assert success, "Callable did not raise an exception"
def assert_raises_message(except_cls, msg, callable_, *args, **kwargs):
try:
callable_(*args, **kwargs)
assert False, "Callable did not raise an exception"
except except_cls as e:
assert re.search(
msg, text_type(e), re.UNICODE), "%r !~ %s" % (msg, e)
print(text_type(e).encode('utf-8'))
else:
from sqlalchemy.testing.assertions import eq_, ne_, is_, is_not_, \
assert_raises_message, assert_raises
def eq_ignore_whitespace(a, b, msg=None):
a = re.sub(r'^\s+?|\n', "", a)
a = re.sub(r' {2,}', " ", a)
b = re.sub(r'^\s+?|\n', "", b)
b = re.sub(r' {2,}', " ", b)
# convert for unicode string rendering,
# using special escape character "!U"
if py3k:
b = re.sub(r'!U', '', b)
else:
b = re.sub(r'!U', 'u', b)
assert a == b, msg or "%r != %r" % (a, b)
def assert_compiled(element, assert_string, dialect=None):
dialect = _get_dialect(dialect)
eq_(
text_type(element.compile(dialect=dialect)).
replace("\n", "").replace("\t", ""),
assert_string.replace("\n", "").replace("\t", "")
)
_dialects = {}
def _get_dialect(name):
if name is None or name == 'default':
return default.DefaultDialect()
else:
try:
return _dialects[name]
except KeyError:
dialect_mod = getattr(
__import__('sqlalchemy.dialects.%s' % name).dialects, name)
_dialects[name] = d = dialect_mod.dialect()
if name == 'postgresql':
d.implicit_returning = True
elif name == 'mssql':
d.legacy_schema_aliasing = False
return d
def expect_warnings(*messages, **kw):
"""Context manager which expects one or more warnings.
With no arguments, squelches all SAWarnings emitted via
sqlalchemy.util.warn and sqlalchemy.util.warn_limited. Otherwise
pass string expressions that will match selected warnings via regex;
all non-matching warnings are sent through.
The expect version **asserts** that the warnings were in fact seen.
Note that the test suite sets SAWarning warnings to raise exceptions.
"""
return _expect_warnings(sa_exc.SAWarning, messages, **kw)
@contextlib.contextmanager
def expect_warnings_on(db, *messages, **kw):
"""Context manager which expects one or more warnings on specific
dialects.
The expect version **asserts** that the warnings were in fact seen.
"""
spec = db_spec(db)
if isinstance(db, util.string_types) and not spec(config._current):
yield
elif not _is_excluded(*db):
yield
else:
with expect_warnings(*messages, **kw):
yield
def emits_warning(*messages):
"""Decorator form of expect_warnings().
Note that emits_warning does **not** assert that the warnings
were in fact seen.
"""
@decorator
def decorate(fn, *args, **kw):
with expect_warnings(assert_=False, *messages):
return fn(*args, **kw)
return decorate
def emits_warning_on(db, *messages):
"""Mark a test as emitting a warning on a specific dialect.
With no arguments, squelches all SAWarning failures. Or pass one or more
strings; these will be matched to the root of the warning description by
warnings.filterwarnings().
Note that emits_warning_on does **not** assert that the warnings
were in fact seen.
"""
@decorator
def decorate(fn, *args, **kw):
with expect_warnings_on(db, *messages):
return fn(*args, **kw)
return decorate
@contextlib.contextmanager
def _expect_warnings(exc_cls, messages, regex=True, assert_=True):
if regex:
filters = [re.compile(msg, re.I) for msg in messages]
else:
filters = messages
seen = set(filters)
real_warn = warnings.warn
def our_warn(msg, exception=None, *arg, **kw):
if exception and not issubclass(exception, exc_cls):
return real_warn(msg, exception, *arg, **kw)
if not filters:
return
for filter_ in filters:
if (regex and filter_.match(msg)) or \
(not regex and filter_ == msg):
seen.discard(filter_)
break
else:
if exception is None:
real_warn(msg, *arg, **kw)
else:
real_warn(msg, exception, *arg, **kw)
with mock.patch("warnings.warn", our_warn):
yield
if assert_:
assert not seen, "Warnings were not seen: %s" % \
", ".join("%r" % (s.pattern if regex else s) for s in seen)
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