1 files changed, 76 insertions, 0 deletions
diff --git a/test_llamachat.py b/test_llamachat.py
index 7707b7b..ae2b478 100755
--- a/test_llamachat.py
+++ b/test_llamachat.py
@@ -579,6 +579,81 @@ def test_prompt_column_migration():
     print("ok  prompt column migration")
 
 
+def test_sidebar_toggle():
+    """The history panel hides, restores its width, and persists."""
+    os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
+    from PySide6.QtWidgets import QApplication
+
+    from llamachat import backend as _backend
+    from llamachat import config as _config
+    from llamachat.ui import ChatWindow
+
+    app = QApplication.instance() or QApplication([])
+    assert app is not None
+
+    with tempfile.TemporaryDirectory() as tmp:
+        cfg = _config.load(Path(tmp) / "config.toml")
+        cfg.prompts_dir = Path(tmp) / "prompts"
+        cfg.db_path = Path(tmp) / "t.db"
+        # state_path already points inside tmp, since it is derived from the
+        # config path, so these checks cannot touch the real saved layout.
+        assert cfg.state_path.parent == Path(tmp), cfg.state_path
+
+        history = db.History(cfg.db_path)
+        client = _backend.Client(cfg.base_url)
+        presets = _config.parse_presets(cfg.presets_path)
+
+        window = ChatWindow(cfg, history, client, presets)
+        window.resize(1000, 700)
+
+        # The shortcut must be registered on the window itself.
+        shortcuts = [
+            a.shortcut().toString()
+            for a in window.actions()
+            if not a.shortcut().isEmpty()
+        ]
+        assert "Ctrl+\\" in shortcuts, shortcuts
+
+        window.show()
+        assert window.sidebar_visible()
+        assert window.sidebar_button.isChecked()
+
+        window.toggle_sidebar()
+        assert not window.sidebar_visible()
+        assert not window.sidebar_button.isChecked()
+
+        window.toggle_sidebar()
+        assert window.sidebar_visible()
+
+        # The width survives a hide/show rather than snapping to a default.
+        window.splitter.setSizes([333, 667])
+        app.processEvents()
+        window.toggle_sidebar()
+        window.toggle_sidebar()
+        assert window.sidebar_width == 333, window.sidebar_width
+
+        # Driving the button directly must take the same path.
+        window.sidebar_button.setChecked(False)
+        app.processEvents()
+        assert not window.sidebar_visible()
+        window.sidebar_button.setChecked(True)
+        app.processEvents()
+        assert window.sidebar_visible()
+        assert window.sidebar_width == 333, window.sidebar_width
+
+        # Hidden state and width must come back on the next start.
+        window.sidebar_button.setChecked(False)
+        window._save_layout()
+        restored = ChatWindow(cfg, history, client, presets)
+        assert not restored.sidebar_button.isChecked()
+        assert restored.sidebar_width == 333, restored.sidebar_width
+
+        restored.close()
+        window.close()
+        history.close()
+    print("ok  sidebar toggle")
+
+
 def test_version_matches_changelog():
     """The package version must be the newest release in the changelog."""
     import re
@@ -682,6 +757,7 @@ if __name__ == "__main__":
     test_session_prompt_storage()
     test_prompt_column_migration()
     test_markdown_rendering()
+    test_sidebar_toggle()
     test_system_qt_theme_guard()
     test_version_matches_changelog()
     test_venv_discovery()