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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import shutil
from migrate import exceptions
from migrate.versioning.schema import *
from migrate.versioning import script, schemadiff
from sqlalchemy import *
from migrate.tests import fixture
class TestControlledSchema(fixture.Pathed, fixture.DB):
# Transactions break postgres in this test; we'll clean up after ourselves
level = fixture.DB.CONNECT
def setUp(self):
super(TestControlledSchema, self).setUp()
self.path_repos = self.temp_usable_dir + '/repo/'
self.repos = Repository.create(self.path_repos, 'repo_name')
def _setup(self, url):
self.setUp()
super(TestControlledSchema, self)._setup(url)
self.cleanup()
def _teardown(self):
super(TestControlledSchema, self)._teardown()
self.cleanup()
self.tearDown()
def cleanup(self):
# drop existing version table if necessary
try:
ControlledSchema(self.engine, self.repos).drop()
except:
# No table to drop; that's fine, be silent
pass
def tearDown(self):
self.cleanup()
super(TestControlledSchema, self).tearDown()
@fixture.usedb()
def test_version_control(self):
"""Establish version control on a particular database"""
# Establish version control on this database
dbcontrol = ControlledSchema.create(self.engine, self.repos)
# Trying to create another DB this way fails: table exists
self.assertRaises(exceptions.DatabaseAlreadyControlledError,
ControlledSchema.create, self.engine, self.repos)
# We can load a controlled DB this way, too
dbcontrol0 = ControlledSchema(self.engine, self.repos)
self.assertEquals(dbcontrol, dbcontrol0)
# We can also use a repository path, instead of a repository
dbcontrol0 = ControlledSchema(self.engine, self.repos.path)
self.assertEquals(dbcontrol, dbcontrol0)
# We don't have to use the same connection
engine = create_engine(self.url)
dbcontrol0 = ControlledSchema(engine, self.repos.path)
self.assertEquals(dbcontrol, dbcontrol0)
# Clean up:
dbcontrol.drop()
# Attempting to drop vc from a db without it should fail
self.assertRaises(exceptions.DatabaseNotControlledError, dbcontrol.drop)
# No table defined should raise error
self.assertRaises(exceptions.DatabaseNotControlledError,
ControlledSchema, self.engine, self.repos)
@fixture.usedb()
def test_version_control_specified(self):
"""Establish version control with a specified version"""
# Establish version control on this database
version = 0
dbcontrol = ControlledSchema.create(self.engine, self.repos, version)
self.assertEquals(dbcontrol.version, version)
# Correct when we load it, too
dbcontrol = ControlledSchema(self.engine, self.repos)
self.assertEquals(dbcontrol.version, version)
dbcontrol.drop()
# Now try it with a nonzero value
version = 10
for i in range(version):
self.repos.create_script('')
self.assertEquals(self.repos.latest, version)
# Test with some mid-range value
dbcontrol = ControlledSchema.create(self.engine,self.repos, 5)
self.assertEquals(dbcontrol.version, 5)
dbcontrol.drop()
# Test with max value
dbcontrol = ControlledSchema.create(self.engine, self.repos, version)
self.assertEquals(dbcontrol.version, version)
dbcontrol.drop()
@fixture.usedb()
def test_version_control_invalid(self):
"""Try to establish version control with an invalid version"""
versions = ('Thirteen', '-1', -1, '' , 13)
# A fresh repository doesn't go up to version 13 yet
for version in versions:
#self.assertRaises(ControlledSchema.InvalidVersionError,
# Can't have custom errors with assertRaises...
try:
ControlledSchema.create(self.engine, self.repos, version)
self.assert_(False, repr(version))
except exceptions.InvalidVersionError:
pass
@fixture.usedb()
def test_changeset(self):
"""Create changeset from controlled schema"""
dbschema = ControlledSchema.create(self.engine, self.repos)
# empty schema doesn't have changesets
cs = dbschema.changeset()
self.assertEqual(cs, {})
for i in range(5):
self.repos.create_script('')
self.assertEquals(self.repos.latest, 5)
cs = dbschema.changeset(5)
self.assertEqual(len(cs), 5)
# cleanup
dbschema.drop()
@fixture.usedb()
def test_upgrade_runchange(self):
dbschema = ControlledSchema.create(self.engine, self.repos)
for i in range(10):
self.repos.create_script('')
self.assertEquals(self.repos.latest, 10)
dbschema.upgrade(10)
self.assertRaises(ValueError, dbschema.upgrade, 'a')
self.assertRaises(exceptions.InvalidVersionError, dbschema.runchange, 20, '', 1)
# TODO: test for table version in db
# cleanup
dbschema.drop()
@fixture.usedb()
def test_create_model(self):
"""Test workflow to generate create_model"""
model = ControlledSchema.create_model(self.engine, self.repos, declarative=False)
self.assertTrue(isinstance(model, basestring))
model = ControlledSchema.create_model(self.engine, self.repos.path, declarative=True)
self.assertTrue(isinstance(model, basestring))
@fixture.usedb()
def test_compare_model_to_db(self):
meta = self.construct_model()
diff = ControlledSchema.compare_model_to_db(self.engine, meta, self.repos)
self.assertTrue(isinstance(diff, schemadiff.SchemaDiff))
diff = ControlledSchema.compare_model_to_db(self.engine, meta, self.repos.path)
self.assertTrue(isinstance(diff, schemadiff.SchemaDiff))
meta.drop_all(self.engine)
@fixture.usedb()
def test_update_db_from_model(self):
dbschema = ControlledSchema.create(self.engine, self.repos)
meta = self.construct_model()
dbschema.update_db_from_model(meta)
# TODO: test for table version in db
# cleanup
dbschema.drop()
meta.drop_all(self.engine)
def construct_model(self):
meta = MetaData()
user = Table('temp_model_schema', meta, Column('id', Integer), Column('user', String(245)))
return meta
# TODO: test how are tables populated in db
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