Fix type of SimpleTestCase.databases defs

Author: adamchainz

tests/testapp/test_checks.py

@@ -9,15 +9,15 @@
 
 class CallCheckTest(TestCase):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     def test_check(self):
         call_command("check", "--database", "default", "--database", "other")
 
 
 class VariablesTests(TransactionTestCase):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     def test_passes(self):
         assert check_variables(app_configs=None, databases=["default", "other"]) == []

tests/testapp/test_dynamicfield.py

@@ -290,7 +290,7 @@ def test_simple(self):
 @isolate_apps("tests.testapp")
 class TestCheck(DynColTestCase):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     def test_db_not_mariadb(self):
         class Valid(models.Model):

tests/testapp/test_enumfield.py

@@ -98,7 +98,7 @@ def test_contains_lookup(self):
 
 class TestCheck(TestCase):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     def test_check(self):
         errors = EnumModel.check()

tests/testapp/test_operations.py

@@ -34,7 +34,7 @@ def table_storage_engine(table_name):
 
 class PluginOperationTests(TransactionTestCase):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     @classmethod
     def setUpClass(cls):

tests/testapp/test_status.py

@@ -36,7 +36,7 @@ def test_cast_string(self):
 
 class GlobalStatusTests(TestCase):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     def test_get(self):
         running = global_status.get("Threads_running")
@@ -126,7 +126,7 @@ def test_other_databases(self):
 
 class SessionStatusTests(TestCase):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     def test_get_bytes_received(self):
         bytes_received = session_status.get("Bytes_received")

tests/testapp/test_test_utils.py

@@ -23,7 +23,7 @@ def check_timestamp(self, expected, using="default"):
 @override_mysql_variables(TIMESTAMP=123)
 class OverrideVarsClassTest(OverrideVarsMethodTest):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     def test_class_decorator(self):
         self.check_timestamp(123)

tests/testapp/test_utils.py

@@ -65,7 +65,7 @@ def test_hours(self):
 
 class IndexNameTests(TestCase):
 
-    databases = ["default", "other"]
+    databases = {"default", "other"}
 
     def test_requires_field_names(self):
         with pytest.raises(ValueError) as excinfo: