chore(test): Centralize app_instance and mock_app fixtures in conftest.py

conductor/tracks.md

@@ -4,6 +4,13 @@ This file tracks all major tracks for the project. Each track has its own detail
 
 ---
 
+## Current Tracks
+
+- [~] **Track: Tech Debt & Test Discipline Cleanup**
+*Link: [./tracks/tech_debt_and_test_cleanup_20260302/](./tracks/tech_debt_and_test_cleanup_20260302/)*
+
+---
+
 ## Completed / Archived
 
 - [x] **Track: Conductor Workflow Improvements**

conductor/tracks/tech_debt_and_test_cleanup_20260302/plan.md

@@ -7,7 +7,7 @@ Architecture reference: [docs/guide_architecture.md](../../../docs/guide_archite
 ## Phase 1: Test Suite Deduplication and Centralization
 Focus: Move `app_instance` and `mock_app` to `tests/conftest.py` and remove them from individual test files.
 
-- [ ] Task 1.1: Add `app_instance` and `mock_app` fixtures to `tests/conftest.py`. Ensure they properly yield the App instance and tear down.
+- [~] Task 1.1: Add `app_instance` and `mock_app` fixtures to `tests/conftest.py`. Ensure they properly yield the App instance and tear down.
 - [ ] Task 1.2: Remove local `app_instance` and `mock_app` fixtures from all 13 identified test files. (Tier 3 Worker string replacement / rewrite).
 - [ ] Task 1.3: Delete `tests/test_ast_parser_curated.py` if its contents are fully duplicated in `test_ast_parser.py`, or merge any missing tests.
 - [ ] Task 1.4: Run the test suite (`pytest`) to ensure no fixture resolution errors.

config.toml

@@ -1,6 +1,6 @@
 [ai]
 provider = "gemini_cli"
-model = "gemini-2.0-flash"
+model = "gemini-2.5-flash-lite"
 temperature = 0.0
 max_tokens = 8192
 history_trunc_limit = 8000
@@ -15,7 +15,7 @@ paths = [
     "C:\\projects\\manual_slop\\tests\\artifacts\\temp_livetoolssim.toml",
     "C:\\projects\\manual_slop\\tests\\artifacts\\temp_liveexecutionsim.toml",
 ]
-active = "C:\\projects\\manual_slop\\tests\\artifacts\\temp_project.toml"
+active = "C:\\projects\\manual_slop\\tests\\artifacts\\temp_liveexecutionsim.toml"
 
 [gui.show_windows]
 "Context Hub" = true

project_history.toml

@@ -8,5 +8,5 @@ active = "main"
 
 [discussions.main]
 git_commit = ""
-last_updated = "2026-03-02T19:29:42"
+last_updated = "2026-03-02T19:55:24"
 history = []

tests/conftest.py

@@ -8,11 +8,13 @@ import sys
 import datetime
 from pathlib import Path
 from typing import Generator, Any
+from unittest.mock import patch, MagicMock
 
 # Ensure project root is in path
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 
 import ai_client
+from gui_2 import App
 
 @pytest.fixture(autouse=True)
 def reset_ai_client() -> Generator[None, None, None]:
@@ -22,6 +24,43 @@ def reset_ai_client() -> Generator[None, None, None]:
  ai_client.set_provider("gemini", "gemini-2.5-flash-lite")
  yield
 
+@pytest.fixture
+def app_instance() -> Generator[App, None, None]:
+ """
+ Centralized App instance with all external side effects mocked.
+ Matches the pattern used in test_token_viz.py and test_gui_phase4.py.
+ """
+ with (
+  patch('gui_2.load_config', return_value={
+   'ai': {'provider': 'gemini', 'model': 'gemini-2.5-flash-lite'},
+   'projects': {'paths': [], 'active': ''},
+   'gui': {'show_windows': {}}
+  }),
+  patch('gui_2.save_config'),
+  patch('gui_2.project_manager'),
+  patch('gui_2.session_logger'),
+  patch('gui_2.immapp.run'),
+  patch.object(App, '_load_active_project'),
+  patch.object(App, '_fetch_models'),
+  patch.object(App, '_load_fonts'),
+  patch.object(App, '_post_init'),
+  patch.object(App, '_prune_old_logs'),
+  patch.object(App, '_init_ai_and_hooks')
+ ):
+  app = App()
+  yield app
+  # Cleanup: Ensure asyncio loop is stopped
+  if hasattr(app, '_loop') and app._loop.is_running():
+   app._loop.call_soon_threadsafe(app._loop.stop)
+
+@pytest.fixture
+def mock_app(app_instance: App) -> App:
+ """
+ Simpler fixture returning a mocked App instance.
+ Reuses app_instance for automatic cleanup and consistent mocking.
+ """
+ return app_instance
+
 class VerificationLogger:
  """High-signal reporting for automated tests, inspired by Unreal Engine's diagnostic style."""
  def __init__(self, test_name: str, script_name: str):