calibre-web/lib/sqlalchemy/testing/assertions.py

378 lines
13 KiB
Python

from __future__ import absolute_import
from . import util as testutil
from sqlalchemy import pool, orm, util
from sqlalchemy.engine import default, create_engine
from sqlalchemy import exc as sa_exc
from sqlalchemy.util import decorator
from sqlalchemy import types as sqltypes, schema
import warnings
import re
from .warnings import resetwarnings
from .exclusions import db_spec, _is_excluded
from . import assertsql
from . import config
import itertools
from .util import fail
import contextlib
def emits_warning(*messages):
"""Mark a test as emitting a warning.
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().
"""
# TODO: it would be nice to assert that a named warning was
# emitted. should work with some monkeypatching of warnings,
# and may work on non-CPython if they keep to the spirit of
# warnings.showwarning's docstring.
# - update: jython looks ok, it uses cpython's module
@decorator
def decorate(fn, *args, **kw):
# todo: should probably be strict about this, too
filters = [dict(action='ignore',
category=sa_exc.SAPendingDeprecationWarning)]
if not messages:
filters.append(dict(action='ignore',
category=sa_exc.SAWarning))
else:
filters.extend(dict(action='ignore',
message=message,
category=sa_exc.SAWarning)
for message in messages)
for f in filters:
warnings.filterwarnings(**f)
try:
return fn(*args, **kw)
finally:
resetwarnings()
return decorate
def emits_warning_on(db, *warnings):
"""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().
"""
spec = db_spec(db)
@decorator
def decorate(fn, *args, **kw):
if isinstance(db, basestring):
if not spec(config.db):
return fn(*args, **kw)
else:
wrapped = emits_warning(*warnings)(fn)
return wrapped(*args, **kw)
else:
if not _is_excluded(*db):
return fn(*args, **kw)
else:
wrapped = emits_warning(*warnings)(fn)
return wrapped(*args, **kw)
return decorate
def uses_deprecated(*messages):
"""Mark a test as immune from fatal deprecation warnings.
With no arguments, squelches all SADeprecationWarning failures.
Or pass one or more strings; these will be matched to the root
of the warning description by warnings.filterwarnings().
As a special case, you may pass a function name prefixed with //
and it will be re-written as needed to match the standard warning
verbiage emitted by the sqlalchemy.util.deprecated decorator.
"""
@decorator
def decorate(fn, *args, **kw):
# todo: should probably be strict about this, too
filters = [dict(action='ignore',
category=sa_exc.SAPendingDeprecationWarning)]
if not messages:
filters.append(dict(action='ignore',
category=sa_exc.SADeprecationWarning))
else:
filters.extend(
[dict(action='ignore',
message=message,
category=sa_exc.SADeprecationWarning)
for message in
[(m.startswith('//') and
('Call to deprecated function ' + m[2:]) or m)
for m in messages]])
for f in filters:
warnings.filterwarnings(**f)
try:
return fn(*args, **kw)
finally:
resetwarnings()
return decorate
def global_cleanup_assertions():
"""Check things that have to be finalized at the end of a test suite.
Hardcoded at the moment, a modular system can be built here
to support things like PG prepared transactions, tables all
dropped, etc.
"""
testutil.lazy_gc()
assert not pool._refs, str(pool._refs)
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 startswith_(a, fragment, msg=None):
"""Assert a.startswith(fragment), with repr messaging on failure."""
assert a.startswith(fragment), msg or "%r does not start with %r" % (
a, fragment)
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, e:
assert re.search(msg, unicode(e), re.UNICODE), u"%r !~ %s" % (msg, e)
print unicode(e).encode('utf-8')
class AssertsCompiledSQL(object):
def assert_compile(self, clause, result, params=None,
checkparams=None, dialect=None,
checkpositional=None,
use_default_dialect=False,
allow_dialect_select=False):
if use_default_dialect:
dialect = default.DefaultDialect()
elif dialect == None and not allow_dialect_select:
dialect = getattr(self, '__dialect__', None)
if dialect == 'default':
dialect = default.DefaultDialect()
elif dialect is None:
dialect = config.db.dialect
elif isinstance(dialect, basestring):
dialect = create_engine("%s://" % dialect).dialect
kw = {}
if params is not None:
kw['column_keys'] = params.keys()
if isinstance(clause, orm.Query):
context = clause._compile_context()
context.statement.use_labels = True
clause = context.statement
c = clause.compile(dialect=dialect, **kw)
param_str = repr(getattr(c, 'params', {}))
# Py3K
#param_str = param_str.encode('utf-8').decode('ascii', 'ignore')
print "\nSQL String:\n" + str(c) + param_str
cc = re.sub(r'[\n\t]', '', str(c))
eq_(cc, result, "%r != %r on dialect %r" % (cc, result, dialect))
if checkparams is not None:
eq_(c.construct_params(params), checkparams)
if checkpositional is not None:
p = c.construct_params(params)
eq_(tuple([p[x] for x in c.positiontup]), checkpositional)
class ComparesTables(object):
def assert_tables_equal(self, table, reflected_table, strict_types=False):
assert len(table.c) == len(reflected_table.c)
for c, reflected_c in zip(table.c, reflected_table.c):
eq_(c.name, reflected_c.name)
assert reflected_c is reflected_table.c[c.name]
eq_(c.primary_key, reflected_c.primary_key)
eq_(c.nullable, reflected_c.nullable)
if strict_types:
msg = "Type '%s' doesn't correspond to type '%s'"
assert type(reflected_c.type) is type(c.type), \
msg % (reflected_c.type, c.type)
else:
self.assert_types_base(reflected_c, c)
if isinstance(c.type, sqltypes.String):
eq_(c.type.length, reflected_c.type.length)
eq_(
set([f.column.name for f in c.foreign_keys]),
set([f.column.name for f in reflected_c.foreign_keys])
)
if c.server_default:
assert isinstance(reflected_c.server_default,
schema.FetchedValue)
assert len(table.primary_key) == len(reflected_table.primary_key)
for c in table.primary_key:
assert reflected_table.primary_key.columns[c.name] is not None
def assert_types_base(self, c1, c2):
assert c1.type._compare_type_affinity(c2.type),\
"On column %r, type '%s' doesn't correspond to type '%s'" % \
(c1.name, c1.type, c2.type)
class AssertsExecutionResults(object):
def assert_result(self, result, class_, *objects):
result = list(result)
print repr(result)
self.assert_list(result, class_, objects)
def assert_list(self, result, class_, list):
self.assert_(len(result) == len(list),
"result list is not the same size as test list, " +
"for class " + class_.__name__)
for i in range(0, len(list)):
self.assert_row(class_, result[i], list[i])
def assert_row(self, class_, rowobj, desc):
self.assert_(rowobj.__class__ is class_,
"item class is not " + repr(class_))
for key, value in desc.iteritems():
if isinstance(value, tuple):
if isinstance(value[1], list):
self.assert_list(getattr(rowobj, key), value[0], value[1])
else:
self.assert_row(value[0], getattr(rowobj, key), value[1])
else:
self.assert_(getattr(rowobj, key) == value,
"attribute %s value %s does not match %s" % (
key, getattr(rowobj, key), value))
def assert_unordered_result(self, result, cls, *expected):
"""As assert_result, but the order of objects is not considered.
The algorithm is very expensive but not a big deal for the small
numbers of rows that the test suite manipulates.
"""
class immutabledict(dict):
def __hash__(self):
return id(self)
found = util.IdentitySet(result)
expected = set([immutabledict(e) for e in expected])
for wrong in itertools.ifilterfalse(lambda o: type(o) == cls, found):
fail('Unexpected type "%s", expected "%s"' % (
type(wrong).__name__, cls.__name__))
if len(found) != len(expected):
fail('Unexpected object count "%s", expected "%s"' % (
len(found), len(expected)))
NOVALUE = object()
def _compare_item(obj, spec):
for key, value in spec.iteritems():
if isinstance(value, tuple):
try:
self.assert_unordered_result(
getattr(obj, key), value[0], *value[1])
except AssertionError:
return False
else:
if getattr(obj, key, NOVALUE) != value:
return False
return True
for expected_item in expected:
for found_item in found:
if _compare_item(found_item, expected_item):
found.remove(found_item)
break
else:
fail(
"Expected %s instance with attributes %s not found." % (
cls.__name__, repr(expected_item)))
return True
def assert_sql_execution(self, db, callable_, *rules):
assertsql.asserter.add_rules(rules)
try:
callable_()
assertsql.asserter.statement_complete()
finally:
assertsql.asserter.clear_rules()
def assert_sql(self, db, callable_, list_, with_sequences=None):
if with_sequences is not None and config.db.dialect.supports_sequences:
rules = with_sequences
else:
rules = list_
newrules = []
for rule in rules:
if isinstance(rule, dict):
newrule = assertsql.AllOf(*[
assertsql.ExactSQL(k, v) for k, v in rule.iteritems()
])
else:
newrule = assertsql.ExactSQL(*rule)
newrules.append(newrule)
self.assert_sql_execution(db, callable_, *newrules)
def assert_sql_count(self, db, callable_, count):
self.assert_sql_execution(
db, callable_, assertsql.CountStatements(count))
@contextlib.contextmanager
def assert_execution(self, *rules):
assertsql.asserter.add_rules(rules)
try:
yield
assertsql.asserter.statement_complete()
finally:
assertsql.asserter.clear_rules()
def assert_statement_count(self, count):
return self.assert_execution(assertsql.CountStatements(count))