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271 | import unittest
import datetime
import sys
import os
import StringIO
from south import migration
from south.tests import Monkeypatcher
from south.utils import snd
class TestMigrationLogic(Monkeypatcher):
"""
Tests if the various logic functions in migration actually work.
"""
def test_get_app_name(self):
self.assertEqual(
"southtest",
migration.get_app_name(self.create_fake_app("southtest.migrations")),
)
self.assertEqual(
"baz",
migration.get_app_name(self.create_fake_app("foo.bar.baz.migrations")),
)
def test_get_migrated_apps(self):
P1 = __import__("fakeapp.migrations", {}, {}, [''])
P2 = __import__("otherfakeapp.migrations", {}, {}, [''])
self.assertEqual(
[P1,P2],
list(migration.get_migrated_apps()),
)
def test_get_app(self):
P1 = __import__("fakeapp.migrations", {}, {}, [''])
self.assertEqual(P1, migration.get_app("fakeapp"))
self.assertEqual(P1, migration.get_app(self.create_fake_app("fakeapp.models")))
def test_get_app_fullname(self):
self.assertEqual(
"southtest",
migration.get_app_fullname(self.create_fake_app("southtest.migrations")),
)
self.assertEqual(
"foo.bar.baz",
migration.get_app_fullname(self.create_fake_app("foo.bar.baz.migrations")),
)
def test_get_migration_names(self):
app = self.create_test_app()
self.assertEqual(
["0001_spam", "0002_eggs", "0003_alter_spam"],
migration.get_migration_names(app),
)
def test_get_migration_classes(self):
app = self.create_test_app()
# Can't use vanilla import, modules beginning with numbers aren't in grammar
M1 = __import__("fakeapp.migrations.0001_spam", {}, {}, ['Migration']).Migration
M2 = __import__("fakeapp.migrations.0002_eggs", {}, {}, ['Migration']).Migration
M3 = __import__("fakeapp.migrations.0003_alter_spam", {}, {}, ['Migration']).Migration
self.assertEqual(
[M1, M2, M3],
list(migration.get_migration_classes(app)),
)
def test_get_migration(self):
app = self.create_test_app()
# Can't use vanilla import, modules beginning with numbers aren't in grammar
M1 = __import__("fakeapp.migrations.0001_spam", {}, {}, ['Migration']).Migration
M2 = __import__("fakeapp.migrations.0002_eggs", {}, {}, ['Migration']).Migration
self.assertEqual(M1, migration.get_migration(app, "0001_spam"))
self.assertEqual(M2, migration.get_migration(app, "0002_eggs"))
# Temporarily redirect sys.stdout during this, it whinges.
stdout, sys.stdout = sys.stdout, StringIO.StringIO()
try:
self.assertRaises((ImportError, ValueError), migration.get_migration, app, "0001_jam")
finally:
sys.stdout = stdout
def test_all_migrations(self):
app = migration.get_app("fakeapp")
otherapp = migration.get_app("otherfakeapp")
self.assertEqual({
app: {
"0001_spam": migration.get_migration(app, "0001_spam"),
"0002_eggs": migration.get_migration(app, "0002_eggs"),
"0003_alter_spam": migration.get_migration(app, "0003_alter_spam"),
},
otherapp: {
"0001_first": migration.get_migration(otherapp, "0001_first"),
"0002_second": migration.get_migration(otherapp, "0002_second"),
"0003_third": migration.get_migration(otherapp, "0003_third"),
},
},
migration.all_migrations(),
)
def assertListEqual(self, list1, list2):
list1 = list(list1)
list2 = list(list2)
list1.sort()
list2.sort()
return self.assertEqual(list1, list2)
def test_apply_migrations(self):
migration.MigrationHistory.objects.all().delete()
app = migration.get_app("fakeapp")
# We should start with no migrations
self.assertEqual(list(migration.MigrationHistory.objects.all()), [])
# Apply them normally
tree = migration.dependency_tree()
migration.migrate_app(app, tree, target_name=None, resolve_mode=None, fake=False, verbosity=0)
# We should finish with all migrations
self.assertListEqual(
(
(u"fakeapp", u"0001_spam"),
(u"fakeapp", u"0002_eggs"),
(u"fakeapp", u"0003_alter_spam"),
),
migration.MigrationHistory.objects.values_list("app_name", "migration"),
)
# Now roll them backwards
migration.migrate_app(app, tree, target_name="zero", resolve_mode=None, fake=False, verbosity=0)
# Finish with none
self.assertEqual(list(migration.MigrationHistory.objects.all()), [])
def test_migration_merge_forwards(self):
migration.MigrationHistory.objects.all().delete()
app = migration.get_app("fakeapp")
# We should start with no migrations
self.assertEqual(list(migration.MigrationHistory.objects.all()), [])
# Insert one in the wrong order
migration.MigrationHistory.objects.create(
app_name = "fakeapp",
migration = "0002_eggs",
applied = datetime.datetime.now(),
)
# Did it go in?
self.assertListEqual(
(
(u"fakeapp", u"0002_eggs"),
),
migration.MigrationHistory.objects.values_list("app_name", "migration"),
)
# Apply them normally
tree = migration.dependency_tree()
try:
# Redirect the error it will print to nowhere
stdout, sys.stdout = sys.stdout, StringIO.StringIO()
migration.migrate_app(app, tree, target_name=None, resolve_mode=None, fake=False, verbosity=0)
sys.stdout = stdout
except SystemExit:
pass
# Nothing should have changed (no merge mode!)
self.assertListEqual(
(
(u"fakeapp", u"0002_eggs"),
),
migration.MigrationHistory.objects.values_list("app_name", "migration"),
)
# Apply with merge
migration.migrate_app(app, tree, target_name=None, resolve_mode="merge", fake=False, verbosity=0)
# We should finish with all migrations
self.assertListEqual(
(
(u"fakeapp", u"0001_spam"),
(u"fakeapp", u"0002_eggs"),
(u"fakeapp", u"0003_alter_spam"),
),
migration.MigrationHistory.objects.values_list("app_name", "migration"),
)
# Now roll them backwards
migration.migrate_app(app, tree, target_name="0002", resolve_mode=None, fake=False, verbosity=0)
migration.migrate_app(app, tree, target_name="0001", resolve_mode=None, fake=True, verbosity=0)
migration.migrate_app(app, tree, target_name="zero", resolve_mode=None, fake=False, verbosity=0)
# Finish with none
self.assertEqual(list(migration.MigrationHistory.objects.all()), [])
def test_alter_column_null(self):
def null_ok():
from django.db import connection, transaction
# the DBAPI introspection module fails on postgres NULLs.
cursor = connection.cursor()
try:
cursor.execute("INSERT INTO southtest_spam (id, weight, expires, name) VALUES (100, 10.1, now(), NULL);")
except:
transaction.rollback()
return False
else:
cursor.execute("DELETE FROM southtest_spam")
transaction.commit()
return True
app = migration.get_app("fakeapp")
tree = migration.dependency_tree()
self.assertEqual(list(migration.MigrationHistory.objects.all()), [])
# by default name is NOT NULL
migration.migrate_app(app, tree, target_name="0002", resolve_mode=None, fake=False, verbosity=0)
self.failIf(null_ok())
# after 0003, it should be NULL
migration.migrate_app(app, tree, target_name="0003", resolve_mode=None, fake=False, verbosity=0)
self.assert_(null_ok())
# make sure it is NOT NULL again
migration.migrate_app(app, tree, target_name="0002", resolve_mode=None, fake=False, verbosity=0)
self.failIf(null_ok(), 'name not null after migration')
# finish with no migrations, otherwise other tests fail...
migration.migrate_app(app, tree, target_name="zero", resolve_mode=None, fake=False, verbosity=0)
self.assertEqual(list(migration.MigrationHistory.objects.all()), [])
def test_dependencies(self):
fakeapp = migration.get_app("fakeapp")
otherfakeapp = migration.get_app("otherfakeapp")
# Test a simple path
tree = migration.dependency_tree()
self.assertEqual(
map(snd, migration.needed_before_forwards(tree, fakeapp, "0003_alter_spam")),
['0001_spam', '0002_eggs'],
)
# And a complex one, with both back and forwards deps
self.assertEqual(
map(snd, migration.needed_before_forwards(tree, otherfakeapp, "0003_third")),
['0001_spam', '0001_first', '0002_second', '0002_eggs', '0003_alter_spam'],
)
|
