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import copy
import datetime
import os
from unittest import mock
from django.db import DEFAULT_DB_ALIAS, connection, connections
from django.db.backends.base.creation import TEST_DATABASE_PREFIX, BaseDatabaseCreation
from django.test import SimpleTestCase, TransactionTestCase
from django.test.utils import override_settings
from ..models import (
CircularA,
CircularB,
Object,
ObjectReference,
ObjectSelfReference,
SchoolBus,
SchoolClass,
)
def get_connection_copy():
# Get a copy of the default connection. (Can't use django.db.connection
# because it'll modify the default connection itself.)
test_connection = copy.copy(connections[DEFAULT_DB_ALIAS])
test_connection.settings_dict = copy.deepcopy(
connections[DEFAULT_DB_ALIAS].settings_dict
)
return test_connection
class TestDbSignatureTests(SimpleTestCase):
def test_default_name(self):
# A test db name isn't set.
prod_name = "hodor"
test_connection = get_connection_copy()
test_connection.settings_dict["NAME"] = prod_name
test_connection.settings_dict["TEST"] = {"NAME": None}
signature = BaseDatabaseCreation(test_connection).test_db_signature()
self.assertEqual(signature[3], TEST_DATABASE_PREFIX + prod_name)
def test_custom_test_name(self):
# A regular test db name is set.
test_name = "hodor"
test_connection = get_connection_copy()
test_connection.settings_dict["TEST"] = {"NAME": test_name}
signature = BaseDatabaseCreation(test_connection).test_db_signature()
self.assertEqual(signature[3], test_name)
def test_custom_test_name_with_test_prefix(self):
# A test db name prefixed with TEST_DATABASE_PREFIX is set.
test_name = TEST_DATABASE_PREFIX + "hodor"
test_connection = get_connection_copy()
test_connection.settings_dict["TEST"] = {"NAME": test_name}
signature = BaseDatabaseCreation(test_connection).test_db_signature()
self.assertEqual(signature[3], test_name)
@override_settings(INSTALLED_APPS=["backends.base.app_unmigrated"])
@mock.patch.object(connection, "ensure_connection")
@mock.patch.object(connection, "prepare_database")
@mock.patch(
"django.db.migrations.recorder.MigrationRecorder.has_table", return_value=False
)
@mock.patch("django.core.management.commands.migrate.Command.sync_apps")
class TestDbCreationTests(SimpleTestCase):
available_apps = ["backends.base.app_unmigrated"]
@mock.patch("django.db.migrations.executor.MigrationExecutor.migrate")
def test_migrate_test_setting_false(
self, mocked_migrate, mocked_sync_apps, *mocked_objects
):
test_connection = get_connection_copy()
test_connection.settings_dict["TEST"]["MIGRATE"] = False
creation = test_connection.creation_class(test_connection)
if connection.vendor == "oracle":
# Don't close connection on Oracle.
creation.connection.close = mock.Mock()
old_database_name = test_connection.settings_dict["NAME"]
try:
with mock.patch.object(creation, "_create_test_db"):
creation.create_test_db(verbosity=0, autoclobber=True, serialize=False)
# Migrations don't run.
mocked_migrate.assert_called()
args, kwargs = mocked_migrate.call_args
self.assertEqual(args, ([],))
self.assertEqual(kwargs["plan"], [])
# App is synced.
mocked_sync_apps.assert_called()
mocked_args, _ = mocked_sync_apps.call_args
self.assertEqual(mocked_args[1], {"app_unmigrated"})
finally:
with mock.patch.object(creation, "_destroy_test_db"):
creation.destroy_test_db(old_database_name, verbosity=0)
@mock.patch("django.db.migrations.executor.MigrationRecorder.ensure_schema")
def test_migrate_test_setting_false_ensure_schema(
self,
mocked_ensure_schema,
mocked_sync_apps,
*mocked_objects,
):
test_connection = get_connection_copy()
test_connection.settings_dict["TEST"]["MIGRATE"] = False
creation = test_connection.creation_class(test_connection)
if connection.vendor == "oracle":
# Don't close connection on Oracle.
creation.connection.close = mock.Mock()
old_database_name = test_connection.settings_dict["NAME"]
try:
with mock.patch.object(creation, "_create_test_db"):
creation.create_test_db(verbosity=0, autoclobber=True, serialize=False)
# The django_migrations table is not created.
mocked_ensure_schema.assert_not_called()
# App is synced.
mocked_sync_apps.assert_called()
mocked_args, _ = mocked_sync_apps.call_args
self.assertEqual(mocked_args[1], {"app_unmigrated"})
finally:
with mock.patch.object(creation, "_destroy_test_db"):
creation.destroy_test_db(old_database_name, verbosity=0)
@mock.patch("django.db.migrations.executor.MigrationExecutor.migrate")
def test_migrate_test_setting_true(
self, mocked_migrate, mocked_sync_apps, *mocked_objects
):
test_connection = get_connection_copy()
test_connection.settings_dict["TEST"]["MIGRATE"] = True
creation = test_connection.creation_class(test_connection)
if connection.vendor == "oracle":
# Don't close connection on Oracle.
creation.connection.close = mock.Mock()
old_database_name = test_connection.settings_dict["NAME"]
try:
with mock.patch.object(creation, "_create_test_db"):
creation.create_test_db(verbosity=0, autoclobber=True, serialize=False)
# Migrations run.
mocked_migrate.assert_called()
args, kwargs = mocked_migrate.call_args
self.assertEqual(args, ([("app_unmigrated", "0001_initial")],))
self.assertEqual(len(kwargs["plan"]), 1)
# App is not synced.
mocked_sync_apps.assert_not_called()
finally:
with mock.patch.object(creation, "_destroy_test_db"):
creation.destroy_test_db(old_database_name, verbosity=0)
@mock.patch.dict(os.environ, {"RUNNING_DJANGOS_TEST_SUITE": ""})
@mock.patch("django.db.migrations.executor.MigrationExecutor.migrate")
@mock.patch.object(BaseDatabaseCreation, "mark_expected_failures_and_skips")
def test_mark_expected_failures_and_skips_call(
self, mark_expected_failures_and_skips, *mocked_objects
):
"""
mark_expected_failures_and_skips() isn't called unless
RUNNING_DJANGOS_TEST_SUITE is 'true'.
"""
test_connection = get_connection_copy()
creation = test_connection.creation_class(test_connection)
if connection.vendor == "oracle":
# Don't close connection on Oracle.
creation.connection.close = mock.Mock()
old_database_name = test_connection.settings_dict["NAME"]
try:
with mock.patch.object(creation, "_create_test_db"):
creation.create_test_db(verbosity=0, autoclobber=True, serialize=False)
self.assertIs(mark_expected_failures_and_skips.called, False)
finally:
with mock.patch.object(creation, "_destroy_test_db"):
creation.destroy_test_db(old_database_name, verbosity=0)
class TestDeserializeDbFromString(TransactionTestCase):
available_apps = ["backends"]
def test_circular_reference(self):
# deserialize_db_from_string() handles circular references.
data = """
[
{
"model": "backends.object",
"pk": 1,
"fields": {"obj_ref": 1, "related_objects": []}
},
{
"model": "backends.objectreference",
"pk": 1,
"fields": {"obj": 1}
}
]
"""
connection.creation.deserialize_db_from_string(data)
obj = Object.objects.get()
obj_ref = ObjectReference.objects.get()
self.assertEqual(obj.obj_ref, obj_ref)
self.assertEqual(obj_ref.obj, obj)
def test_self_reference(self):
# serialize_db_to_string() and deserialize_db_from_string() handles
# self references.
obj_1 = ObjectSelfReference.objects.create(key="X")
obj_2 = ObjectSelfReference.objects.create(key="Y", obj=obj_1)
obj_1.obj = obj_2
obj_1.save()
# Serialize objects.
with mock.patch("django.db.migrations.loader.MigrationLoader") as loader:
# serialize_db_to_string() serializes only migrated apps, so mark
# the backends app as migrated.
loader_instance = loader.return_value
loader_instance.migrated_apps = {"backends"}
data = connection.creation.serialize_db_to_string()
ObjectSelfReference.objects.all().delete()
# Deserialize objects.
connection.creation.deserialize_db_from_string(data)
obj_1 = ObjectSelfReference.objects.get(key="X")
obj_2 = ObjectSelfReference.objects.get(key="Y")
self.assertEqual(obj_1.obj, obj_2)
self.assertEqual(obj_2.obj, obj_1)
def test_circular_reference_with_natural_key(self):
# serialize_db_to_string() and deserialize_db_from_string() handles
# circular references for models with natural keys.
obj_a = CircularA.objects.create(key="A")
obj_b = CircularB.objects.create(key="B", obj=obj_a)
obj_a.obj = obj_b
obj_a.save()
# Serialize objects.
with mock.patch("django.db.migrations.loader.MigrationLoader") as loader:
# serialize_db_to_string() serializes only migrated apps, so mark
# the backends app as migrated.
loader_instance = loader.return_value
loader_instance.migrated_apps = {"backends"}
data = connection.creation.serialize_db_to_string()
CircularA.objects.all().delete()
CircularB.objects.all().delete()
# Deserialize objects.
connection.creation.deserialize_db_from_string(data)
obj_a = CircularA.objects.get()
obj_b = CircularB.objects.get()
self.assertEqual(obj_a.obj, obj_b)
self.assertEqual(obj_b.obj, obj_a)
def test_serialize_db_to_string_base_manager(self):
SchoolClass.objects.create(year=1000, last_updated=datetime.datetime.now())
with mock.patch("django.db.migrations.loader.MigrationLoader") as loader:
# serialize_db_to_string() serializes only migrated apps, so mark
# the backends app as migrated.
loader_instance = loader.return_value
loader_instance.migrated_apps = {"backends"}
data = connection.creation.serialize_db_to_string()
self.assertIn('"model": "backends.schoolclass"', data)
self.assertIn('"year": 1000', data)
def test_serialize_db_to_string_base_manager_with_prefetch_related(self):
sclass = SchoolClass.objects.create(
year=2000, last_updated=datetime.datetime.now()
)
bus = SchoolBus.objects.create(number=1)
bus.schoolclasses.add(sclass)
with mock.patch("django.db.migrations.loader.MigrationLoader") as loader:
# serialize_db_to_string() serializes only migrated apps, so mark
# the backends app as migrated.
loader_instance = loader.return_value
loader_instance.migrated_apps = {"backends"}
data = connection.creation.serialize_db_to_string()
self.assertIn('"model": "backends.schoolbus"', data)
self.assertIn('"model": "backends.schoolclass"', data)
self.assertIn(f'"schoolclasses": [{sclass.pk}]', data)
class SkipTestClass:
def skip_function(self):
pass
def skip_test_function():
pass
def expected_failure_test_function():
pass
class TestMarkTests(SimpleTestCase):
def test_mark_expected_failures_and_skips(self):
test_connection = get_connection_copy()
creation = BaseDatabaseCreation(test_connection)
creation.connection.features.django_test_expected_failures = {
"backends.base.test_creation.expected_failure_test_function",
}
creation.connection.features.django_test_skips = {
"skip test class": {
"backends.base.test_creation.SkipTestClass",
},
"skip test function": {
"backends.base.test_creation.skip_test_function",
},
}
creation.mark_expected_failures_and_skips()
self.assertIs(
expected_failure_test_function.__unittest_expecting_failure__,
True,
)
self.assertIs(SkipTestClass.__unittest_skip__, True)
self.assertEqual(
SkipTestClass.__unittest_skip_why__,
"skip test class",
)
self.assertIs(skip_test_function.__unittest_skip__, True)
self.assertEqual(
skip_test_function.__unittest_skip_why__,
"skip test function",
)
|
