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Mini Shell
# coding: utf-8
import io
import re
from sqlalchemy import create_engine, text, MetaData
import alembic
from ..util.compat import configparser
from .. import util
from ..util.compat import string_types, text_type
from ..migration import MigrationContext
from ..environment import EnvironmentContext
from ..operations import Operations
from contextlib import contextmanager
from .plugin.plugin_base import SkipTest
from .assertions import _get_dialect, eq_
from . import mock
testing_config = configparser.ConfigParser()
testing_config.read(['test.cfg'])
if not util.sqla_094:
class TestBase(object):
# A sequence of database names to always run, regardless of the
# constraints below.
__whitelist__ = ()
# A sequence of requirement names matching testing.requires decorators
__requires__ = ()
# A sequence of dialect names to exclude from the test class.
__unsupported_on__ = ()
# If present, test class is only runnable for the *single* specified
# dialect. If you need multiple, use __unsupported_on__ and invert.
__only_on__ = None
# A sequence of no-arg callables. If any are True, the entire testcase is
# skipped.
__skip_if__ = None
def assert_(self, val, msg=None):
assert val, msg
# apparently a handful of tests are doing this....OK
def setup(self):
if hasattr(self, "setUp"):
self.setUp()
def teardown(self):
if hasattr(self, "tearDown"):
self.tearDown()
else:
from sqlalchemy.testing.fixtures import TestBase
def capture_db():
buf = []
def dump(sql, *multiparams, **params):
buf.append(str(sql.compile(dialect=engine.dialect)))
engine = create_engine("postgresql://", strategy="mock", executor=dump)
return engine, buf
_engs = {}
@contextmanager
def capture_context_buffer(**kw):
if kw.pop('bytes_io', False):
buf = io.BytesIO()
else:
buf = io.StringIO()
kw.update({
'dialect_name': "sqlite",
'output_buffer': buf
})
conf = EnvironmentContext.configure
def configure(*arg, **opt):
opt.update(**kw)
return conf(*arg, **opt)
with mock.patch.object(EnvironmentContext, "configure", configure):
yield buf
def op_fixture(
dialect='default', as_sql=False,
naming_convention=None, literal_binds=False):
opts = {}
if naming_convention:
if not util.sqla_092:
raise SkipTest(
"naming_convention feature requires "
"sqla 0.9.2 or greater")
opts['target_metadata'] = MetaData(naming_convention=naming_convention)
class buffer_(object):
def __init__(self):
self.lines = []
def write(self, msg):
msg = msg.strip()
msg = re.sub(r'[\n\t]', '', msg)
if as_sql:
# the impl produces soft tabs,
# so search for blocks of 4 spaces
msg = re.sub(r' ', '', msg)
msg = re.sub('\;\n*$', '', msg)
self.lines.append(msg)
def flush(self):
pass
buf = buffer_()
class ctx(MigrationContext):
def clear_assertions(self):
buf.lines[:] = []
def assert_(self, *sql):
# TODO: make this more flexible about
# whitespace and such
eq_(buf.lines, list(sql))
def assert_contains(self, sql):
for stmt in buf.lines:
if sql in stmt:
return
else:
assert False, "Could not locate fragment %r in %r" % (
sql,
buf.lines
)
if as_sql:
opts['as_sql'] = as_sql
if literal_binds:
opts['literal_binds'] = literal_binds
ctx_dialect = _get_dialect(dialect)
if not as_sql:
def execute(stmt, *multiparam, **param):
if isinstance(stmt, string_types):
stmt = text(stmt)
assert stmt.supports_execution
sql = text_type(stmt.compile(dialect=ctx_dialect))
buf.write(sql)
connection = mock.Mock(dialect=ctx_dialect, execute=execute)
else:
opts['output_buffer'] = buf
connection = None
context = ctx(
ctx_dialect,
connection,
opts)
alembic.op._proxy = Operations(context)
return context
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