I can display tabsmanager

tests/controls/conftest.py

@@ -0,0 +1,16 @@
+import pytest
+
+
+@pytest.fixture(scope="session")
+def session():
+  return {
+      "user_info": {
+          'email': 'test@myfasthtml.com',
+          'username': 'test_user',
+          'roles': ['admin'],
+          'user_settings': {},
+          'id': 'test_user_id',
+          'created_at': '2025-11-10T15:52:59.006213',
+          'updated_at': '2025-11-10T15:52:59.006213'
+      }
+  }

tests/controls/test_tabsmanager.py

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+import pytest
+from fasthtml.components import *
+
+from myfasthtml.controls.TabsManager import TabsManager
+from myfasthtml.core.instances import InstancesManager
+from .conftest import session
+
+
+@pytest.fixture()
+def tabs_manager(session):
+  yield TabsManager(session)
+  
+  InstancesManager.reset()
+
+
+def test_tabs_manager_is_registered(session, tabs_manager):
+  from_instance_manager = InstancesManager.get(session, tabs_manager.get_id())
+  assert from_instance_manager == tabs_manager
+
+
+def test_i_can_add_tab(tabs_manager):
+  tab_id = tabs_manager.add_tab("Users", Div("Content 1"))
+  
+  assert tab_id is not None
+  assert tab_id in tabs_manager.get_state().tabs
+  assert tabs_manager.get_state().tabs[tab_id]["label"] == "Users"
+  assert tabs_manager.get_state().tabs[tab_id]["component_type"] is None  # Div is not BaseInstance
+  assert tabs_manager.get_state().tabs[tab_id]["component_id"] is None  # Div is not BaseInstance
+  assert tabs_manager.get_state().tabs_order == [tab_id]
+  assert tabs_manager.get_state().active_tab == tab_id