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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import sys
import shutil
from migrate import exceptions
from migrate.versioning import version, repository
from migrate.versioning.script import *
from migrate.versioning.util import *
from migrate.tests import fixture
from migrate.tests.fixture.models import tmp_sql_table
class TestBaseScript(fixture.Pathed):
def test_all(self):
"""Testing all basic BaseScript operations"""
# verify / source / run
src = self.tmp()
open(src, 'w').close()
bscript = BaseScript(src)
BaseScript.verify(src)
self.assertEqual(bscript.source(), '')
self.assertRaises(NotImplementedError, bscript.run, 'foobar')
class TestPyScript(fixture.Pathed, fixture.DB):
cls = PythonScript
def test_create(self):
"""We can create a migration script"""
path = self.tmp_py()
# Creating a file that doesn't exist should succeed
self.cls.create(path)
self.assert_(os.path.exists(path))
# Created file should be a valid script (If not, raises an error)
self.cls.verify(path)
# Can't create it again: it already exists
self.assertRaises(exceptions.PathFoundError,self.cls.create,path)
@fixture.usedb(supported='sqlite')
def test_run(self):
script_path = self.tmp_py()
pyscript = PythonScript.create(script_path)
pyscript.run(self.engine, 1)
pyscript.run(self.engine, -1)
self.assertRaises(exceptions.ScriptError, pyscript.run, self.engine, 0)
self.assertRaises(exceptions.ScriptError, pyscript._func, 'foobar')
# clean pyc file
os.remove(script_path + 'c')
# test deprecated upgrade/downgrade with no arguments
contents = open(script_path, 'r').read()
f = open(script_path, 'w')
f.write(contents.replace("upgrade(migrate_engine)", "upgrade()"))
f.close()
pyscript = PythonScript(script_path)
pyscript._module = None
try:
pyscript.run(self.engine, 1)
pyscript.run(self.engine, -1)
except exceptions.ScriptError:
pass
else:
self.fail()
def test_verify_notfound(self):
"""Correctly verify a python migration script: nonexistant file"""
path = self.tmp_py()
self.assertFalse(os.path.exists(path))
# Fails on empty path
self.assertRaises(exceptions.InvalidScriptError,self.cls.verify,path)
self.assertRaises(exceptions.InvalidScriptError,self.cls,path)
def test_verify_invalidpy(self):
"""Correctly verify a python migration script: invalid python file"""
path=self.tmp_py()
# Create empty file
f = open(path,'w')
f.write("def fail")
f.close()
self.assertRaises(Exception,self.cls.verify_module,path)
# script isn't verified on creation, but on module reference
py = self.cls(path)
self.assertRaises(Exception,(lambda x: x.module),py)
def test_verify_nofuncs(self):
"""Correctly verify a python migration script: valid python file; no upgrade func"""
path = self.tmp_py()
# Create empty file
f = open(path, 'w')
f.write("def zergling():\n\tprint 'rush'")
f.close()
self.assertRaises(exceptions.InvalidScriptError, self.cls.verify_module, path)
# script isn't verified on creation, but on module reference
py = self.cls(path)
self.assertRaises(exceptions.InvalidScriptError,(lambda x: x.module),py)
@fixture.usedb(supported='sqlite')
def test_preview_sql(self):
"""Preview SQL abstract from ORM layer (sqlite)"""
path = self.tmp_py()
f = open(path, 'w')
content = '''
from migrate import *
from sqlalchemy import *
metadata = MetaData()
UserGroup = Table('Link', metadata,
Column('link1ID', Integer),
Column('link2ID', Integer),
UniqueConstraint('link1ID', 'link2ID'))
def upgrade(migrate_engine):
metadata.create_all(migrate_engine)
'''
f.write(content)
f.close()
pyscript = self.cls(path)
SQL = pyscript.preview_sql(self.url, 1)
self.assertEqualsIgnoreWhitespace("""
CREATE TABLE "Link"
("link1ID" INTEGER,
"link2ID" INTEGER,
UNIQUE ("link1ID", "link2ID"))
""", SQL)
# TODO: test: No SQL should be executed!
def test_verify_success(self):
"""Correctly verify a python migration script: success"""
path = self.tmp_py()
# Succeeds after creating
self.cls.create(path)
self.cls.verify(path)
# test for PythonScript.make_update_script_for_model
@fixture.usedb()
def test_make_update_script_for_model(self):
"""Construct script source from differences of two models"""
self.setup_model_params()
self.write_file(self.first_model_path, self.base_source)
self.write_file(self.second_model_path, self.base_source + self.model_source)
source_script = self.pyscript.make_update_script_for_model(
engine=self.engine,
oldmodel=load_model('testmodel_first:meta'),
model=load_model('testmodel_second:meta'),
repository=self.repo_path,
)
self.assertTrue("['User'].create()" in source_script)
self.assertTrue("['User'].drop()" in source_script)
@fixture.usedb()
def test_make_update_script_for_equal_models(self):
"""Try to make update script from two identical models"""
self.setup_model_params()
self.write_file(self.first_model_path, self.base_source + self.model_source)
self.write_file(self.second_model_path, self.base_source + self.model_source)
source_script = self.pyscript.make_update_script_for_model(
engine=self.engine,
oldmodel=load_model('testmodel_first:meta'),
model=load_model('testmodel_second:meta'),
repository=self.repo_path,
)
self.assertFalse('User.create()' in source_script)
self.assertFalse('User.drop()' in source_script)
@fixture.usedb()
def test_make_update_script_direction(self):
"""Check update scripts go in the right direction"""
self.setup_model_params()
self.write_file(self.first_model_path, self.base_source)
self.write_file(self.second_model_path, self.base_source + self.model_source)
source_script = self.pyscript.make_update_script_for_model(
engine=self.engine,
oldmodel=load_model('testmodel_first:meta'),
model=load_model('testmodel_second:meta'),
repository=self.repo_path,
)
self.assertTrue(0
< source_script.find('upgrade')
< source_script.find("['User'].create()")
< source_script.find('downgrade')
< source_script.find("['User'].drop()"))
def setup_model_params(self):
self.script_path = self.tmp_py()
self.repo_path = self.tmp()
self.first_model_path = os.path.join(self.temp_usable_dir, 'testmodel_first.py')
self.second_model_path = os.path.join(self.temp_usable_dir, 'testmodel_second.py')
self.base_source = """from sqlalchemy import *\nmeta = MetaData()\n"""
self.model_source = """
User = Table('User', meta,
Column('id', Integer, primary_key=True),
Column('login', Unicode(40)),
Column('passwd', String(40)),
)"""
self.repo = repository.Repository.create(self.repo_path, 'repo')
self.pyscript = PythonScript.create(self.script_path)
sys.modules.pop('testmodel_first', None)
sys.modules.pop('testmodel_second', None)
def write_file(self, path, contents):
f = open(path, 'w')
f.write(contents)
f.close()
class TestSqlScript(fixture.Pathed, fixture.DB):
@fixture.usedb()
def test_error(self):
"""Test if exception is raised on wrong script source"""
src = self.tmp()
f = open(src, 'w')
f.write("""foobar""")
f.close()
sqls = SqlScript(src)
self.assertRaises(Exception, sqls.run, self.engine)
@fixture.usedb()
def test_success(self):
"""Test sucessful SQL execution"""
# cleanup and prepare python script
tmp_sql_table.metadata.drop_all(self.engine, checkfirst=True)
script_path = self.tmp_py()
pyscript = PythonScript.create(script_path)
# populate python script
contents = open(script_path, 'r').read()
contents = contents.replace("pass", "tmp_sql_table.create(migrate_engine)")
contents = 'from migrate.tests.fixture.models import tmp_sql_table\n' + contents
f = open(script_path, 'w')
f.write(contents)
f.close()
# write SQL script from python script preview
pyscript = PythonScript(script_path)
src = self.tmp()
f = open(src, 'w')
f.write(pyscript.preview_sql(self.url, 1))
f.close()
# run the change
sqls = SqlScript(src)
sqls.run(self.engine, executemany=False)
tmp_sql_table.metadata.drop_all(self.engine, checkfirst=True)
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