fix: addon managers import (#1920)

flask_appbuilder/base.py

@@ -332,10 +332,10 @@ def _add_addon_views(self) -> None:
         """
         for addon in self._addon_managers:
             addon_class_ = dynamic_class_import(addon)
-            addon_class = cast(Type[BaseManager], addon_class_)
+            addon_class = cast(Type["BaseManager"], addon_class_)
             if addon_class:
                 # Instantiate manager with appbuilder (self)
-                inst_addon_class: BaseManager = addon_class(self)
+                inst_addon_class: "BaseManager" = addon_class(self)
                 try:
                     inst_addon_class.pre_process()
                     inst_addon_class.register_views()

flask_appbuilder/tests/A_fixture/addon_manager.py

@@ -0,0 +1,15 @@
+from flask_appbuilder import BaseView, expose
+from flask_appbuilder.basemanager import BaseManager
+
+
+class DummyView(BaseView):
+    route_base = "/dummy"
+
+    @expose("/method1/<string:param1>")
+    def method1(self, param1):
+        return param1
+
+
+class DummyAddOnManager(BaseManager):
+    def register_views(self):
+        self.appbuilder.add_view_no_menu(DummyView)

flask_appbuilder/tests/test_addon.py

@@ -0,0 +1,45 @@
+import logging
+import os
+
+from flask_appbuilder import SQLA
+from flask_appbuilder.tests.A_fixture.addon_manager import DummyAddOnManager
+
+from .base import FABTestCase
+
+
+log = logging.getLogger(__name__)
+
+
+class FlaskTestCase(FABTestCase):
+    def setUp(self):
+        from flask import Flask
+        from flask_appbuilder import AppBuilder
+
+        self.app = Flask(__name__)
+        self.basedir = os.path.abspath(os.path.dirname(__file__))
+        self.app.config.from_object("flask_appbuilder.tests.config_api")
+        self.app.config["ADDON_MANAGERS"] = [
+            "flask_appbuilder.tests.A_fixture.addon_manager.DummyAddOnManager"
+        ]
+
+        self.db = SQLA(self.app)
+        self.appbuilder = AppBuilder(self.app, self.db.session)
+
+    def tearDown(self):
+        self.appbuilder = None
+        self.app = None
+        self.db = None
+
+    def test_addon_import(self):
+        self.assertIsInstance(
+            self.appbuilder.addon_managers[
+                "flask_appbuilder.tests.A_fixture.addon_manager.DummyAddOnManager"
+            ],
+            DummyAddOnManager,
+        )
+
+    def test_addon_register_views(self):
+        client = self.app.test_client()
+        rv = client.get("/dummy/method1/test1")
+        self.assertEqual(rv.status_code, 200)
+        self.assertEqual(rv.data.decode("utf-8"), "test1")

flask_appbuilder/tests/test_menu.py

@@ -46,7 +46,6 @@ def tearDown(self):
         self.appbuilder = None
         self.app = None
         self.db = None
-        log.debug("TEAR DOWN")
 
     def test_menu_access_denied(self):
         """