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from django_test_migrations.constants import MIGRATION_TEST_MARKER
from django_test_migrations.contrib.unittest_case import MigratorTestCase
class TestDirectMigration(MigratorTestCase):
"""This class is used to test direct migrations."""
migrate_from = ('main_app', '0002_someitem_is_clean')
migrate_to = ('main_app', '0003_update_is_clean')
@classmethod
def setUpClass(cls):
"""Override parent's setUpClass to trigger #503."""
super().setUpClass()
def prepare(self):
"""Prepare some data before the migration."""
SomeItem = self.old_state.apps.get_model('main_app', 'SomeItem')
SomeItem.objects.create(string_field='a')
SomeItem.objects.create(string_field='a b')
def test_migration_main0003(self):
"""Run the test itself."""
SomeItem = self.new_state.apps.get_model('main_app', 'SomeItem')
assert SomeItem.objects.count() == 2
assert SomeItem.objects.filter(is_clean=True).count() == 1
class TestBackwardMigration(MigratorTestCase):
"""This class is used to test backward migrations."""
migrate_from = ('main_app', '0002_someitem_is_clean')
migrate_to = ('main_app', '0001_initial')
def prepare(self):
"""Prepare some data before the migration."""
SomeItem = self.old_state.apps.get_model('main_app', 'SomeItem')
SomeItem.objects.create(string_field='a')
SomeItem.objects.create(string_field='a b')
def test_migration_main0001(self):
"""Run the test itself."""
SomeItem = self.new_state.apps.get_model('main_app', 'SomeItem')
assert SomeItem.objects.count() == 2
def test_migration_test_marker_tag():
"""Ensure ``MigratorTestCase`` subclasses are properly tagged."""
assert MIGRATION_TEST_MARKER in TestDirectMigration.tags
assert MIGRATION_TEST_MARKER in TestBackwardMigration.tags
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