Added basic python unit test for ImageConverter

Author: hyi18

.gitignore

@@ -1,4 +1,5 @@
 .DS_Store
 build/
 build-coverage/
-tests/materials/*.exr
+tests/materials/*.exr
+__pycache__/

tests/python/test_image_converter.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: Apache-2.0
+# Copyright Contributors to the rawtoaces Project.
+
+"""
+Unit tests for rawtoaces Python bindings - ImageConverter class
+"""
+
+import pytest
+import sys
+import os
+
+# Add build directory to path to import the compiled module
+# NOTE: Adjust this path based on your build configuration
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '../../build/src/bindings'))
+
+try:
+    import rawtoaces
+except ImportError as e:
+    pytest.skip(f"rawtoaces module not found. Build the Python bindings first: {e}", allow_module_level=True)
+
+
+class TestImageConverter:
+    """Test cases for the ImageConverter class"""
+
+    def test_converter_creation(self):
+        """Test that ImageConverter can be instantiated"""
+        converter = rawtoaces.ImageConverter()
+        assert converter is not None
+        assert isinstance(converter, rawtoaces.ImageConverter)
+
+    def test_converter_has_settings(self):
+        """Test that ImageConverter has a settings attribute"""
+        converter = rawtoaces.ImageConverter()
+        assert hasattr(converter, "settings")
+        assert converter.settings is not None
+
+    def test_converter_has_process_image_method(self):
+        """Test that ImageConverter has process_image method"""
+        converter = rawtoaces.ImageConverter()
+        assert hasattr(converter, "process_image")
+        assert callable(converter.process_image)
+
+    def test_process_image_with_invalid_path(self):
+        """Test process_image with non-existent file returns False"""
+        converter = rawtoaces.ImageConverter()
+        result = converter.process_image("/nonexistent/file.txt")
+        assert result is False
+
+        result = converter.process_image("")
+        assert result is False
+
+
+class TestSettings:
+    """Test cases for the ImageConverter.Settings class"""
+
+    def test_settings_creation(self):
+        """Test that Settings can be instantiated"""
+        converter = rawtoaces.ImageConverter()
+        settings = converter.settings
+        assert settings is not None
+        assert isinstance(settings, rawtoaces.ImageConverter.Settings)
+
+    def test_settings_direct_creation(self):
+        """Test that Settings can be created directly"""
+        settings = rawtoaces.ImageConverter.Settings()
+        assert settings is not None
+        assert isinstance(settings, rawtoaces.ImageConverter.Settings)
+
+
+if __name__ == "__main__":
+    pytest.main([__file__])