Added tests for migrate logging and error messages.

tests/migrations/test_commands.py

@@ -36,7 +36,11 @@ class MigrateTests(MigrationTestBase):
         self.assertTableNotExists("migrations_tribble")
         self.assertTableNotExists("migrations_book")
         # Run the migrations to 0001 only
-        call_command("migrate", "migrations", "0001", verbosity=0)
+        stdout = io.StringIO()
+        call_command('migrate', 'migrations', '0001', verbosity=1, stdout=stdout, no_color=True)
+        stdout = stdout.getvalue()
+        self.assertIn('Target specific migration: 0001_initial, from migrations', stdout)
+        self.assertIn('Applying migrations.0001_initial... OK', stdout)
         # The correct tables exist
         self.assertTableExists("migrations_author")
         self.assertTableExists("migrations_tribble")
@@ -48,7 +52,11 @@ class MigrateTests(MigrationTestBase):
         self.assertTableNotExists("migrations_tribble")
         self.assertTableExists("migrations_book")
         # Unmigrate everything
-        call_command("migrate", "migrations", "zero", verbosity=0)
+        stdout = io.StringIO()
+        call_command('migrate', 'migrations', 'zero', verbosity=1, stdout=stdout, no_color=True)
+        stdout = stdout.getvalue()
+        self.assertIn('Unapply all migrations: migrations', stdout)
+        self.assertIn('Unapplying migrations.0002_second... OK', stdout)
         # Tables are gone
         self.assertTableNotExists("migrations_author")
         self.assertTableNotExists("migrations_tribble")
@@ -64,6 +72,27 @@ class MigrateTests(MigrationTestBase):
         call_command('migrate', skip_checks=False, no_color=True, stdout=out)
         self.assertIn('Apply all migrations: migrated_app', out.getvalue())
 
+    @override_settings(INSTALLED_APPS=['migrations', 'migrations.migrations_test_apps.unmigrated_app_syncdb'])
+    def test_app_without_migrations(self):
+        msg = "App 'unmigrated_app_syncdb' does not have migrations."
+        with self.assertRaisesMessage(CommandError, msg):
+            call_command('migrate', app_label='unmigrated_app_syncdb')
+
+    @override_settings(MIGRATION_MODULES={'migrations': 'migrations.test_migrations_clashing_prefix'})
+    def test_ambigious_prefix(self):
+        msg = (
+            "More than one migration matches 'a' in app 'migrations'. Please "
+            "be more specific."
+        )
+        with self.assertRaisesMessage(CommandError, msg):
+            call_command('migrate', app_label='migrations', migration_name='a')
+
+    @override_settings(MIGRATION_MODULES={'migrations': 'migrations.test_migrations'})
+    def test_unknown_prefix(self):
+        msg = "Cannot find a migration matching 'nonexistent' from app 'migrations'."
+        with self.assertRaisesMessage(CommandError, msg):
+            call_command('migrate', app_label='migrations', migration_name='nonexistent')
+
     @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_initial_false"})
     def test_migrate_initial_false(self):
         """
@@ -552,13 +581,18 @@ class MigrateTests(MigrationTestBase):
         For an app without migrations, editor.execute() is used for executing
         the syncdb deferred SQL.
         """
+        stdout = io.StringIO()
         with mock.patch.object(BaseDatabaseSchemaEditor, 'execute') as execute:
-            call_command('migrate', run_syncdb=True, verbosity=0)
+            call_command('migrate', run_syncdb=True, verbosity=1, stdout=stdout, no_color=True)
             create_table_count = len([call for call in execute.mock_calls if 'CREATE TABLE' in str(call)])
             self.assertEqual(create_table_count, 2)
             # There's at least one deferred SQL for creating the foreign key
             # index.
             self.assertGreater(len(execute.mock_calls), 2)
+        stdout = stdout.getvalue()
+        self.assertIn('Synchronize unmigrated apps: unmigrated_app_syncdb', stdout)
+        self.assertIn('Creating tables...', stdout)
+        self.assertIn('Creating table unmigrated_app_syncdb_classroom', stdout)
 
     @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"})
     def test_migrate_record_replaced(self):

tests/migrations/test_migrations_clashing_prefix/a.py

+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    pass

tests/migrations/test_migrations_clashing_prefix/ab.py

+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [('migrations', 'a')]