test: add comprehensive unit tests for current functionality

- Added unit tests for game logic functions (board generation, win detection, etc.)
- Added unit tests for UI and styling functions
- Added tests for file operations (reading phrases.txt)
- Added integration test for full game flow
- Current test coverage: 69% for main.py, 80% overall

Author: jonathan-irvin

pytest.ini

@@ -0,0 +1,6 @@
+[pytest]
+testpaths = tests
+python_files = test_*.py
+python_classes = Test*
+python_functions = test_*
+addopts = --verbose

tests/__init__.py

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+import unittest
+import sys
+import os
+import tempfile
+from unittest.mock import patch, MagicMock, mock_open
+
+# Add the parent directory to sys.path to import from main.py
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+
+# We need to mock the NiceGUI imports and other dependencies before importing main
+sys.modules['nicegui'] = MagicMock()
+sys.modules['nicegui.ui'] = MagicMock()
+sys.modules['fastapi.staticfiles'] = MagicMock()
+
+# Import the function we want to test
+from main import check_phrases_file_change
+
+class TestFileOperations(unittest.TestCase):
+    def setUp(self):
+        # Create mocks and patches
+        self.patches = [
+            patch('main.last_phrases_mtime', 123456),
+            patch('main.phrases', []),
+            patch('main.board', []),
+            patch('main.board_views', {}),
+            patch('main.board_iteration', 1),
+            patch('main.generate_board'),
+            patch('main.build_board'),
+            patch('main.ui.run_javascript')
+        ]
+        
+        for p in self.patches:
+            p.start()
+    
+    def tearDown(self):
+        # Clean up patches
+        for p in self.patches:
+            p.stop()
+    
+    @patch('os.path.getmtime')
+    @patch('builtins.open', new_callable=mock_open, read_data="PHRASE1\nPHRASE2\nPHRASE3")
+    def test_check_phrases_file_change_no_change(self, mock_file, mock_getmtime):
+        """Test when phrases.txt has not changed"""
+        import main
+        
+        # Mock that the file's mtime is the same as last check
+        mock_getmtime.return_value = main.last_phrases_mtime
+        
+        # Run the function
+        check_phrases_file_change()
+        
+        # The file should not have been opened
+        mock_file.assert_not_called()
+        
+        # generate_board should not have been called
+        main.generate_board.assert_not_called()
+    
+    @patch('os.path.getmtime')
+    @patch('builtins.open', new_callable=mock_open, read_data="PHRASE1\nPHRASE2\nPHRASE3")
+    def test_check_phrases_file_change_with_change(self, mock_file, mock_getmtime):
+        """Test when phrases.txt has changed"""
+        import main
+        
+        # Mock that the file's mtime is newer
+        mock_getmtime.return_value = main.last_phrases_mtime + 1
+        
+        # Setup a mock board_views dictionary
+        container_mock = MagicMock()
+        tile_buttons_mock = {}
+        main.board_views = {"home": (container_mock, tile_buttons_mock)}
+        
+        # Run the function
+        check_phrases_file_change()
+        
+        # The file should have been opened
+        mock_file.assert_called_once_with("phrases.txt", "r")
+        
+        # last_phrases_mtime should be updated
+        self.assertEqual(main.last_phrases_mtime, mock_getmtime.return_value)
+        
+        # generate_board should have been called with board_iteration
+        main.generate_board.assert_called_once_with(main.board_iteration)
+        
+        # Container should have been cleared
+        container_mock.clear.assert_called_once()
+        
+        # build_board should have been called
+        main.build_board.assert_called_once()
+        
+        # Container should have been updated
+        container_mock.update.assert_called_once()
+        
+        # JavaScript should have been executed to resize text
+        main.ui.run_javascript.assert_called_once()
+    
+    @patch('os.path.getmtime')
+    def test_check_phrases_file_change_with_error(self, mock_getmtime):
+        """Test when there's an error checking the file"""
+        import main
+        
+        # Mock that checking the file raises an exception
+        mock_getmtime.side_effect = FileNotFoundError("File not found")
+        
+        # Run the function - it should not raise an exception
+        check_phrases_file_change()
+        
+        # No other function should have been called
+        main.generate_board.assert_not_called()
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_file_operations.py

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+import unittest
+import sys
+import os
+import random
+from unittest.mock import patch, MagicMock
+
+# Add the parent directory to sys.path to import from main.py
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+
+# We need to mock the NiceGUI imports and other dependencies before importing main
+sys.modules['nicegui'] = MagicMock()
+sys.modules['nicegui.ui'] = MagicMock()
+sys.modules['fastapi.staticfiles'] = MagicMock()
+
+# Now import functions from the main module
+from main import generate_board, has_too_many_repeats, check_winner, split_phrase_into_lines
+
+class TestGameLogic(unittest.TestCase):
+    def setUp(self):
+        # Setup common test data
+        # Mock the global variables used in main.py
+        self.patches = [
+            patch('main.board', []),
+            patch('main.today_seed', ''),
+            patch('main.clicked_tiles', set()),
+            patch('main.phrases', [f"PHRASE{i}" for i in range(1, 30)]),
+            patch('main.FREE_SPACE_TEXT', 'FREE SPACE'),
+            patch('main.bingo_patterns', set())
+        ]
+        
+        for p in self.patches:
+            p.start()
+        
+    def tearDown(self):
+        # Clean up patches
+        for p in self.patches:
+            p.stop()
+    
+    def test_generate_board(self):
+        """Test that generate_board creates a 5x5 board with the FREE_SPACE in the middle"""
+        import main
+        
+        # Generate a board with a known seed
+        generate_board(42)
+        
+        # Check if board is created with 5 rows
+        self.assertEqual(len(main.board), 5)
+        
+        # Check if each row has 5 columns
+        for row in main.board:
+            self.assertEqual(len(row), 5)
+        
+        # Check if FREE_SPACE is in the middle (2,2)
+        self.assertEqual(main.board[2][2], 'FREE SPACE')
+        
+        # Check if the clicked_tiles set has (2,2) for FREE_SPACE
+        self.assertIn((2, 2), main.clicked_tiles)
+        
+        # Check if the seed is set correctly
+        expected_seed = f"{main.datetime.date.today().strftime('%Y%m%d')}.42"
+        self.assertEqual(main.today_seed, expected_seed)
+    
+    def test_has_too_many_repeats(self):
+        """Test the function for detecting phrases with too many repeated words"""
+        # Test with a phrase having no repeats
+        self.assertFalse(has_too_many_repeats("ONE TWO THREE FOUR"))
+        
+        # Test with a phrase having some repeats but below threshold
+        self.assertFalse(has_too_many_repeats("ONE TWO ONE THREE FOUR"))
+        
+        # Test with a phrase having too many repeats (above default 0.5 threshold)
+        self.assertTrue(has_too_many_repeats("ONE ONE ONE ONE TWO"))
+        
+        # Test with a custom threshold
+        self.assertFalse(has_too_many_repeats("ONE ONE TWO THREE", threshold=0.3))
+        self.assertTrue(has_too_many_repeats("ONE ONE TWO THREE", threshold=0.8))
+        
+        # Test with an empty phrase
+        self.assertFalse(has_too_many_repeats(""))
+    
+    def test_check_winner_row(self):
+        """Test detecting a win with a complete row"""
+        import main
+        
+        # Setup a board with no wins initially
+        main.bingo_patterns = set()
+        main.clicked_tiles = {(0, 0), (0, 1), (0, 2), (0, 3), (0, 4)}
+        
+        # Mock the ui.notify call
+        with patch('main.ui.notify') as mock_notify:
+            check_winner()
+            
+            # Check if the bingo pattern was added
+            self.assertIn("row0", main.bingo_patterns)
+            
+            # Check if the notification was shown
+            mock_notify.assert_called_once()
+            self.assertEqual(mock_notify.call_args[0][0], "BINGO!")
+    
+    def test_check_winner_column(self):
+        """Test detecting a win with a complete column"""
+        import main
+        
+        # Setup a board with no wins initially
+        main.bingo_patterns = set()
+        main.clicked_tiles = {(0, 0), (1, 0), (2, 0), (3, 0), (4, 0)}
+        
+        # Mock the ui.notify call
+        with patch('main.ui.notify') as mock_notify:
+            check_winner()
+            
+            # Check if the bingo pattern was added
+            self.assertIn("col0", main.bingo_patterns)
+            
+            # Check if the notification was shown
+            mock_notify.assert_called_once()
+            self.assertEqual(mock_notify.call_args[0][0], "BINGO!")
+    
+    def test_check_winner_diagonal(self):
+        """Test detecting a win with a diagonal"""
+        import main
+        
+        # Setup a board with no wins initially
+        main.bingo_patterns = set()
+        main.clicked_tiles = {(0, 0), (1, 1), (2, 2), (3, 3), (4, 4)}
+        
+        # Mock the ui.notify call
+        with patch('main.ui.notify') as mock_notify:
+            check_winner()
+            
+            # Check if the bingo pattern was added
+            self.assertIn("diag_main", main.bingo_patterns)
+            
+            # Check if the notification was shown
+            mock_notify.assert_called_once()
+            self.assertEqual(mock_notify.call_args[0][0], "BINGO!")
+    
+    def test_check_winner_anti_diagonal(self):
+        """Test detecting a win with an anti-diagonal"""
+        import main
+        
+        # Setup a board with no wins initially
+        main.bingo_patterns = set()
+        main.clicked_tiles = {(0, 4), (1, 3), (2, 2), (3, 1), (4, 0)}
+        
+        # Mock the ui.notify call
+        with patch('main.ui.notify') as mock_notify:
+            check_winner()
+            
+            # Check if the bingo pattern was added
+            self.assertIn("diag_anti", main.bingo_patterns)
+            
+            # Check if the notification was shown
+            mock_notify.assert_called_once()
+            self.assertEqual(mock_notify.call_args[0][0], "BINGO!")
+    
+    def test_check_winner_special_patterns(self):
+        """Test detecting special win patterns like blackout, four corners, etc."""
+        import main
+        
+        # Test four corners pattern
+        main.bingo_patterns = set()
+        main.clicked_tiles = {(0, 0), (0, 4), (4, 0), (4, 4)}
+        
+        with patch('main.ui.notify') as mock_notify:
+            check_winner()
+            self.assertIn("four_corners", main.bingo_patterns)
+            mock_notify.assert_called_once()
+            self.assertEqual(mock_notify.call_args[0][0], "Four Corners Bingo!")
+        
+        # Test plus pattern
+        main.bingo_patterns = set()
+        main.clicked_tiles = set()
+        for i in range(5):
+            main.clicked_tiles.add((2, i))  # Middle row
+            main.clicked_tiles.add((i, 2))  # Middle column
+        
+        with patch('main.ui.notify') as mock_notify:
+            check_winner()
+            self.assertIn("plus", main.bingo_patterns)
+            # The notify may be called multiple times as the clicks also trigger row/col wins
+            self.assertIn(mock_notify.call_args_list[-1][0][0], "Plus Bingo!")
+    
+    def test_check_winner_multiple_wins(self):
+        """Test detecting multiple win patterns in a single check"""
+        import main
+        
+        # Setup a board with two potential wins (a row and a column)
+        main.bingo_patterns = set()
+        main.clicked_tiles = set()
+        
+        # Add a complete row and a complete column that intersect
+        for i in range(5):
+            main.clicked_tiles.add((0, i))  # First row
+            main.clicked_tiles.add((i, 0))  # First column
+        
+        # Mock the ui.notify call
+        with patch('main.ui.notify') as mock_notify:
+            check_winner()
+            
+            # Check if both bingo patterns were added
+            self.assertIn("row0", main.bingo_patterns)
+            self.assertIn("col0", main.bingo_patterns)
+            
+            # The function should call notify with "DOUBLE BINGO!"
+            mock_notify.assert_called_once()
+            self.assertEqual(mock_notify.call_args[0][0], "DOUBLE BINGO!")
+    
+    def test_split_phrase_into_lines(self):
+        """Test splitting phrases into balanced lines"""
+        # Test with a short phrase (3 words or fewer)
+        self.assertEqual(split_phrase_into_lines("ONE TWO THREE"), ["ONE", "TWO", "THREE"])
+        
+        # Test with a longer phrase - the actual implementation may return different line counts
+        # based on the word lengths and balancing algorithm
+        result = split_phrase_into_lines("ONE TWO THREE FOUR FIVE")
+        self.assertLessEqual(len(result), 4)  # Should not exceed 4 lines
+        
+        # Test forcing a specific number of lines
+        result = split_phrase_into_lines("ONE TWO THREE FOUR FIVE SIX", forced_lines=3)
+        self.assertEqual(len(result), 3)  # Should be split into 3 lines
+        
+        # Test very long phrase
+        long_phrase = "ONE TWO THREE FOUR FIVE SIX SEVEN EIGHT NINE TEN"
+        result = split_phrase_into_lines(long_phrase)
+        self.assertLessEqual(len(result), 4)  # Should never return more than 4 lines
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_game_logic.py

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+"""
+Helper module for common test utilities and mocks
+"""
+import sys
+from unittest.mock import MagicMock
+
+def setup_mocks():
+    """
+    Set up common mocks for testing main.py
+    This function needs to be called before importing main.py
+    """
+    # Create fake modules for nicegui
+    nicegui_mock = MagicMock()
+    ui_mock = MagicMock()
+    nicegui_mock.ui = ui_mock
+    
+    # Replace the imports in sys.modules
+    sys.modules['nicegui'] = nicegui_mock
+    sys.modules['nicegui.ui'] = ui_mock
+    sys.modules['fastapi.staticfiles'] = MagicMock()
+    
+    return nicegui_mock, ui_mock