feat: Add coverage, iniconfig, pluggy, pygments, pytest, pytest-cov, and pytest-mock as dependencies

- Added coverage version 7.10.1 with multiple wheel distributions.
- Added iniconfig version 2.1.0 with its wheel distribution.
- Added pluggy version 1.6.0 with its wheel distribution.
- Added pygments version 2.19.2 with its wheel distribution.
- Added pytest version 8.4.1 with its wheel distribution and dependencies.
- Added pytest-cov version 6.2.1 with its wheel distribution and dependencies.
- Added pytest-mock version 3.14.1 with its wheel distribution and dependencies.
- Updated dev-dependencies to include coverage, pytest, pytest-cov, and pytest-mock.
- Updated requires-dist to specify minimum versions for coverage, pytest, pytest-cov, and pytest-mock.

tests/test_constants.py

@@ -0,0 +1,130 @@
+"""
+Tests for constants module.
+"""
+import os
+import pytest
+from unittest.mock import patch
+
+import sys
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'src'))
+
+
+class TestConstants:
+    """Test cases for the constants module."""
+
+    def test_default_log_level(self):
+        """Test default LOG_LEVEL when not set in environment."""
+        with patch.dict(os.environ, {}, clear=True):
+            # Re-import to get fresh values
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            assert constants.LOG_LEVEL == "INFO"
+
+    def test_custom_log_level(self):
+        """Test custom LOG_LEVEL from environment."""
+        with patch.dict(os.environ, {'LOG_LEVEL': 'debug'}, clear=True):
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            assert constants.LOG_LEVEL == "DEBUG"
+
+    def test_default_log_path(self):
+        """Test default LOG_PATH when not set in environment."""
+        with patch.dict(os.environ, {}, clear=True):
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            assert constants.LOG_PATH == "/tmp/logs/thechart"
+
+    def test_custom_log_path(self):
+        """Test custom LOG_PATH from environment."""
+        with patch.dict(os.environ, {'LOG_PATH': '/custom/log/path'}, clear=True):
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            assert constants.LOG_PATH == "/custom/log/path"
+
+    def test_default_log_clear(self):
+        """Test default LOG_CLEAR when not set in environment."""
+        with patch.dict(os.environ, {}, clear=True):
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            assert constants.LOG_CLEAR == "False"
+
+    def test_custom_log_clear_true(self):
+        """Test LOG_CLEAR when set to true in environment."""
+        with patch.dict(os.environ, {'LOG_CLEAR': 'true'}, clear=True):
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            assert constants.LOG_CLEAR == "True"
+
+    def test_custom_log_clear_false(self):
+        """Test LOG_CLEAR when set to false in environment."""
+        with patch.dict(os.environ, {'LOG_CLEAR': 'false'}, clear=True):
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            assert constants.LOG_CLEAR == "False"
+
+    def test_log_level_case_insensitive(self):
+        """Test that LOG_LEVEL is converted to uppercase."""
+        with patch.dict(os.environ, {'LOG_LEVEL': 'warning'}, clear=True):
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            assert constants.LOG_LEVEL == "WARNING"
+
+    def test_dotenv_override(self):
+        """Test that dotenv override parameter is set to True."""
+        # This is a structural test since dotenv is loaded during import
+        with patch('constants.load_dotenv') as mock_load_dotenv:
+            import importlib
+            if 'constants' in sys.modules:
+                importlib.reload(sys.modules['constants'])
+            else:
+                import constants
+
+            mock_load_dotenv.assert_called_once_with(override=True)
+
+    def test_all_constants_are_strings(self):
+        """Test that all constants are string type."""
+        import constants
+
+        assert isinstance(constants.LOG_LEVEL, str)
+        assert isinstance(constants.LOG_PATH, str)
+        assert isinstance(constants.LOG_CLEAR, str)
+
+    def test_constants_not_empty(self):
+        """Test that constants are not empty strings."""
+        import constants
+
+        assert constants.LOG_LEVEL != ""
+        assert constants.LOG_PATH != ""
+        assert constants.LOG_CLEAR != ""