mirror of https://github.com/django/django.git
243 lines
12 KiB
Python
243 lines
12 KiB
Python
from django.test import TestCase
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from django.db import connection, models, migrations
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from django.db.utils import IntegrityError
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from django.db.migrations.state import ProjectState
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class OperationTests(TestCase):
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"""
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Tests running the operations and making sure they do what they say they do.
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Each test looks at their state changing, and then their database operation -
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both forwards and backwards.
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"""
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def assertTableExists(self, table):
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self.assertIn(table, connection.introspection.get_table_list(connection.cursor()))
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def assertTableNotExists(self, table):
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self.assertNotIn(table, connection.introspection.get_table_list(connection.cursor()))
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def assertColumnExists(self, table, column):
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self.assertIn(column, [c.name for c in connection.introspection.get_table_description(connection.cursor(), table)])
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def assertColumnNotExists(self, table, column):
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self.assertNotIn(column, [c.name for c in connection.introspection.get_table_description(connection.cursor(), table)])
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def assertColumnNull(self, table, column):
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self.assertEqual([c.null_ok for c in connection.introspection.get_table_description(connection.cursor(), table) if c.name == column][0], True)
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def assertColumnNotNull(self, table, column):
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self.assertEqual([c.null_ok for c in connection.introspection.get_table_description(connection.cursor(), table) if c.name == column][0], False)
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def set_up_test_model(self, app_label):
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"""
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Creates a test model state and database table.
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"""
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# Make the "current" state
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creation = migrations.CreateModel(
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"Pony",
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[
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("id", models.AutoField(primary_key=True)),
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("pink", models.BooleanField(default=True)),
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("weight", models.FloatField()),
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],
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)
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project_state = ProjectState()
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creation.state_forwards(app_label, project_state)
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# Set up the database
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with connection.schema_editor() as editor:
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creation.database_forwards(app_label, editor, ProjectState(), project_state)
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return project_state
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def test_create_model(self):
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"""
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Tests the CreateModel operation.
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Most other tests use this operation as part of setup, so check failures here first.
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"""
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operation = migrations.CreateModel(
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"Pony",
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[
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("id", models.AutoField(primary_key=True)),
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("pink", models.IntegerField(default=1)),
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],
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)
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# Test the state alteration
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project_state = ProjectState()
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new_state = project_state.clone()
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operation.state_forwards("test_crmo", new_state)
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self.assertEqual(new_state.models["test_crmo", "pony"].name, "pony")
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self.assertEqual(len(new_state.models["test_crmo", "pony"].fields), 2)
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# Test the database alteration
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self.assertTableNotExists("test_crmo_pony")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_crmo", editor, project_state, new_state)
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self.assertTableExists("test_crmo_pony")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_crmo", editor, new_state, project_state)
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self.assertTableNotExists("test_crmo_pony")
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# And deconstruction
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definition = operation.deconstruct()
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self.assertEqual(definition[0], "CreateModel")
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self.assertEqual(len(definition[1]), 2)
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self.assertEqual(len(definition[2]), 0)
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self.assertEqual(definition[1][0], "Pony")
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def test_delete_model(self):
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"""
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Tests the DeleteModel operation.
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"""
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project_state = self.set_up_test_model("test_dlmo")
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# Test the state alteration
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operation = migrations.DeleteModel("Pony")
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new_state = project_state.clone()
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operation.state_forwards("test_dlmo", new_state)
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self.assertNotIn(("test_dlmo", "pony"), new_state.models)
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# Test the database alteration
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self.assertTableExists("test_dlmo_pony")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_dlmo", editor, project_state, new_state)
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self.assertTableNotExists("test_dlmo_pony")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_dlmo", editor, new_state, project_state)
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self.assertTableExists("test_dlmo_pony")
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def test_add_field(self):
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"""
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Tests the AddField operation.
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"""
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project_state = self.set_up_test_model("test_adfl")
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# Test the state alteration
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operation = migrations.AddField("Pony", "height", models.FloatField(null=True))
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new_state = project_state.clone()
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operation.state_forwards("test_adfl", new_state)
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self.assertEqual(len(new_state.models["test_adfl", "pony"].fields), 4)
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# Test the database alteration
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self.assertColumnNotExists("test_adfl_pony", "height")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_adfl", editor, project_state, new_state)
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self.assertColumnExists("test_adfl_pony", "height")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_adfl", editor, new_state, project_state)
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self.assertColumnNotExists("test_adfl_pony", "height")
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def test_remove_field(self):
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"""
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Tests the RemoveField operation.
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"""
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project_state = self.set_up_test_model("test_rmfl")
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# Test the state alteration
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operation = migrations.RemoveField("Pony", "pink")
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new_state = project_state.clone()
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operation.state_forwards("test_rmfl", new_state)
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self.assertEqual(len(new_state.models["test_rmfl", "pony"].fields), 2)
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# Test the database alteration
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self.assertColumnExists("test_rmfl_pony", "pink")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_rmfl", editor, project_state, new_state)
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self.assertColumnNotExists("test_rmfl_pony", "pink")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_rmfl", editor, new_state, project_state)
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self.assertColumnExists("test_rmfl_pony", "pink")
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def test_alter_model_table(self):
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"""
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Tests the AlterModelTable operation.
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"""
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project_state = self.set_up_test_model("test_almota")
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# Test the state alteration
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operation = migrations.AlterModelTable("Pony", "test_almota_pony_2")
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new_state = project_state.clone()
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operation.state_forwards("test_almota", new_state)
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self.assertEqual(new_state.models["test_almota", "pony"].options["db_table"], "test_almota_pony_2")
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# Test the database alteration
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self.assertTableExists("test_almota_pony")
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self.assertTableNotExists("test_almota_pony_2")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_almota", editor, project_state, new_state)
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self.assertTableNotExists("test_almota_pony")
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self.assertTableExists("test_almota_pony_2")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_almota", editor, new_state, project_state)
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self.assertTableExists("test_almota_pony")
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self.assertTableNotExists("test_almota_pony_2")
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def test_alter_field(self):
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"""
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Tests the AlterField operation.
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"""
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project_state = self.set_up_test_model("test_alfl")
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# Test the state alteration
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operation = migrations.AlterField("Pony", "pink", models.IntegerField(null=True))
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new_state = project_state.clone()
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operation.state_forwards("test_alfl", new_state)
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self.assertEqual(project_state.models["test_alfl", "pony"].get_field_by_name("pink").null, False)
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self.assertEqual(new_state.models["test_alfl", "pony"].get_field_by_name("pink").null, True)
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# Test the database alteration
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self.assertColumnNotNull("test_alfl_pony", "pink")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_alfl", editor, project_state, new_state)
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self.assertColumnNull("test_alfl_pony", "pink")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_alfl", editor, new_state, project_state)
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self.assertColumnNotNull("test_alfl_pony", "pink")
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def test_rename_field(self):
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"""
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Tests the RenameField operation.
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"""
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project_state = self.set_up_test_model("test_rnfl")
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# Test the state alteration
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operation = migrations.RenameField("Pony", "pink", "blue")
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new_state = project_state.clone()
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operation.state_forwards("test_rnfl", new_state)
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self.assertIn("blue", [n for n, f in new_state.models["test_rnfl", "pony"].fields])
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self.assertNotIn("pink", [n for n, f in new_state.models["test_rnfl", "pony"].fields])
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# Test the database alteration
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self.assertColumnExists("test_rnfl_pony", "pink")
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self.assertColumnNotExists("test_rnfl_pony", "blue")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_rnfl", editor, project_state, new_state)
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self.assertColumnExists("test_rnfl_pony", "blue")
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self.assertColumnNotExists("test_rnfl_pony", "pink")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_rnfl", editor, new_state, project_state)
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self.assertColumnExists("test_rnfl_pony", "pink")
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self.assertColumnNotExists("test_rnfl_pony", "blue")
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def test_alter_unique_together(self):
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"""
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Tests the AlterUniqueTogether operation.
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"""
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project_state = self.set_up_test_model("test_alunto")
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# Test the state alteration
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operation = migrations.AlterUniqueTogether("Pony", [("pink", "weight")])
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new_state = project_state.clone()
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operation.state_forwards("test_alunto", new_state)
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self.assertEqual(len(project_state.models["test_alunto", "pony"].options.get("unique_together", set())), 0)
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self.assertEqual(len(new_state.models["test_alunto", "pony"].options.get("unique_together", set())), 1)
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# Make sure we can insert duplicate rows
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cursor = connection.cursor()
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
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cursor.execute("DELETE FROM test_alunto_pony")
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# Test the database alteration
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with connection.schema_editor() as editor:
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operation.database_forwards("test_alunto", editor, project_state, new_state)
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
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with self.assertRaises(IntegrityError):
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
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cursor.execute("DELETE FROM test_alunto_pony")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_alunto", editor, new_state, project_state)
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
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cursor.execute("DELETE FROM test_alunto_pony")
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