PICA GUI test added

Author: prathameshnium

tests/test_full_stack_simulation.py

@@ -2,17 +2,27 @@
 import sys
 import os
 import importlib
-from unittest.mock import MagicMock, patch, mock_open
+import pytest
+from unittest.mock import MagicMock, patch, mock_open, PropertyMock
 
-# -------------------------------------------------------------------------
-# 1. GLOBAL MOCKS (The "Headless" GUI Trick)
-# -------------------------------------------------------------------------
-sys.modules['tkinter'] = MagicMock()
-sys.modules['tkinter.ttk'] = MagicMock()
-sys.modules['tkinter.messagebox'] = MagicMock()
-sys.modules['tkinter.filedialog'] = MagicMock()
 
 # Matplotlib Mocks
+@pytest.fixture(autouse=True)
+def mock_gui_libraries():
+    """
+    This fixture mocks the entire tkinter and matplotlib libraries to prevent
+    any GUI windows from being created during tests. It is applied automatically
+    to all tests within this file.
+    """
+    with patch.dict('sys.modules', {
+        'tkinter': MagicMock(),
+        'tkinter.ttk': MagicMock(),
+        'tkinter.messagebox': MagicMock(),
+        'tkinter.filedialog': MagicMock(),
+    }):
+        yield
+
+
 class TestDeepSimulation(unittest.TestCase):
 
     def setUp(self):

tests/test_pica_launcher.py

@@ -0,0 +1,45 @@
+# tests/test_pica_launcher.py
+"""
+Unit tests for the main PICA Launcher GUI application.
+
+These tests are designed to run in a CI environment, so they use mocking
+to prevent the GUI from entering its main loop and blocking the test runner.
+"""
+
+import tkinter as tk
+from unittest.mock import patch, MagicMock
+import pytest
+
+# The PICA_v6.py file contains the main PICALauncherApp
+from PICA_v6 import PICALauncherApp
+
+
+@pytest.fixture
+def mock_app_dependencies():
+    """
+    Pytest fixture to mock dependencies that would block or interfere with
+    a non-interactive test run.
+    """
+    # Mock methods that would create new windows, run blocking loops, or
+    # perform file I/O.
+    with patch('tkinter.Tk.mainloop', MagicMock()), \
+         patch('PICA_v6.PICALauncherApp.run_gpib_test', MagicMock()), \
+         patch('PICA_v6.PICALauncherApp._load_logo', MagicMock()), \
+         patch('PICA_v6.PICALauncherApp._pre_cache_markdown_files', MagicMock()):
+        yield
+
+
+def test_pica_launcher_initialization(mock_app_dependencies):
+    """
+    Tests if the PICALauncherApp initializes without errors.
+
+    It confirms that the main window is created and that key widgets
+    like the console are initialized.
+    """
+    root = tk.Tk()
+    app = PICALauncherApp(root)
+
+    # --- Assertions ---
+    assert app is not None, "PICALauncherApp failed to initialize."
+    assert app.root.title() == f"PICA Launcher v{app.PROGRAM_VERSION}", "Window title was not set correctly."
+    assert app.console_widget is not None, "Console widget was not created during initialization."