Initial commit

skills/ai-multimodal/scripts/tests/requirements.txt

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+# Core dependencies
+google-genai>=0.2.0
+python-dotenv>=1.0.0
+
+# Image processing
+pillow>=10.0.0
+
+# PDF processing
+pypdf>=3.0.0
+
+# Document conversion
+markdown>=3.5
+
+# Testing
+pytest>=7.4.0
+pytest-cov>=4.1.0
+pytest-mock>=3.12.0
+
+# Optional dependencies for full functionality
+# ffmpeg-python>=0.2.0  # For media optimization (requires ffmpeg installed)

skills/ai-multimodal/scripts/tests/test_document_converter.py

@@ -0,0 +1,299 @@
+"""
+Tests for document_converter.py
+"""
+
+import pytest
+import sys
+from pathlib import Path
+from unittest.mock import Mock, patch, MagicMock
+
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+import document_converter as dc
+
+
+class TestEnvLoading:
+    """Test environment variable loading."""
+
+    @patch('document_converter.load_dotenv')
+    @patch('pathlib.Path.exists')
+    def test_load_env_files_success(self, mock_exists, mock_load_dotenv):
+        """Test successful .env file loading."""
+        mock_exists.return_value = True
+        dc.load_env_files()
+        # Should be called for skill, skills, and claude dirs
+        assert mock_load_dotenv.call_count >= 1
+
+    @patch('document_converter.load_dotenv', None)
+    def test_load_env_files_no_dotenv(self):
+        """Test when dotenv is not available."""
+        # Should not raise an error
+        dc.load_env_files()
+
+
+class TestDependencyCheck:
+    """Test dependency checking."""
+
+    @patch('builtins.__import__')
+    def test_check_all_dependencies_available(self, mock_import):
+        """Test when all dependencies are available."""
+        mock_import.return_value = Mock()
+
+        deps = dc.check_dependencies()
+
+        assert 'pypdf' in deps
+        assert 'markdown' in deps
+        assert 'pillow' in deps
+
+    @patch('builtins.__import__')
+    def test_check_dependencies_missing(self, mock_import):
+        """Test when dependencies are missing."""
+        def import_side_effect(name, *args, **kwargs):
+            if name == 'pypdf':
+                raise ImportError()
+            return Mock()
+
+        mock_import.side_effect = import_side_effect
+
+        # The function uses try/except, so we test the actual function
+        with patch('document_converter.sys.modules', {}):
+            # This is tricky to test due to import handling
+            pass
+
+
+class TestPDFPageExtraction:
+    """Test PDF page extraction."""
+
+    @patch('pypdf.PdfReader')
+    @patch('pypdf.PdfWriter')
+    @patch('builtins.open', create=True)
+    def test_extract_single_page(self, mock_open, mock_writer_class, mock_reader_class):
+        """Test extracting a single page."""
+        # Mock reader
+        mock_reader = Mock()
+        mock_page = Mock()
+        mock_reader.pages = [Mock(), mock_page, Mock()]
+        mock_reader_class.return_value = mock_reader
+
+        # Mock writer
+        mock_writer = Mock()
+        mock_writer.pages = [mock_page]
+        mock_writer_class.return_value = mock_writer
+
+        result = dc.extract_pdf_pages(
+            'input.pdf',
+            'output.pdf',
+            page_range='2',
+            verbose=False
+        )
+
+        assert result is True
+        mock_writer.add_page.assert_called_once_with(mock_page)
+
+    @patch('pypdf.PdfReader')
+    @patch('pypdf.PdfWriter')
+    @patch('builtins.open', create=True)
+    def test_extract_page_range(self, mock_open, mock_writer_class, mock_reader_class):
+        """Test extracting a range of pages."""
+        mock_reader = Mock()
+        mock_reader.pages = [Mock() for _ in range(10)]
+        mock_reader_class.return_value = mock_reader
+
+        mock_writer = Mock()
+        mock_writer.pages = []
+        mock_writer_class.return_value = mock_writer
+
+        result = dc.extract_pdf_pages(
+            'input.pdf',
+            'output.pdf',
+            page_range='2-5',
+            verbose=False
+        )
+
+        assert result is True
+        assert mock_writer.add_page.call_count == 4  # Pages 2-5 (4 pages)
+
+    def test_extract_pages_no_pypdf(self):
+        """Test page extraction without pypdf."""
+        with patch.dict('sys.modules', {'pypdf': None}):
+            result = dc.extract_pdf_pages('input.pdf', 'output.pdf', '1-10')
+            assert result is False
+
+
+class TestPDFOptimization:
+    """Test PDF optimization."""
+
+    @patch('pypdf.PdfReader')
+    @patch('pypdf.PdfWriter')
+    @patch('builtins.open', create=True)
+    @patch('pathlib.Path.stat')
+    def test_optimize_pdf_success(self, mock_stat, mock_open, mock_writer_class, mock_reader_class):
+        """Test successful PDF optimization."""
+        # Mock reader
+        mock_reader = Mock()
+        mock_page = Mock()
+        mock_reader.pages = [mock_page, mock_page]
+        mock_reader_class.return_value = mock_reader
+
+        # Mock writer
+        mock_writer = Mock()
+        mock_writer.pages = [mock_page, mock_page]
+        mock_writer_class.return_value = mock_writer
+
+        # Mock file sizes
+        mock_stat.return_value.st_size = 1024 * 1024
+
+        result = dc.optimize_pdf('input.pdf', 'output.pdf', verbose=False)
+
+        assert result is True
+        mock_page.compress_content_streams.assert_called()
+
+    def test_optimize_pdf_no_pypdf(self):
+        """Test PDF optimization without pypdf."""
+        with patch.dict('sys.modules', {'pypdf': None}):
+            result = dc.optimize_pdf('input.pdf', 'output.pdf')
+            assert result is False
+
+
+class TestImageExtraction:
+    """Test image extraction from PDFs."""
+
+    @patch('pypdf.PdfReader')
+    @patch('PIL.Image')
+    @patch('pathlib.Path.mkdir')
+    @patch('builtins.open', create=True)
+    def test_extract_images_success(self, mock_open, mock_mkdir, mock_image, mock_reader_class):
+        """Test successful image extraction."""
+        # Mock PDF reader
+        mock_reader = Mock()
+        mock_page = MagicMock()
+
+        # Mock XObject with image
+        mock_obj = MagicMock()
+        mock_obj.__getitem__.side_effect = lambda k: {
+            '/Subtype': '/Image',
+            '/Width': 100,
+            '/Height': 100,
+            '/Filter': '/DCTDecode'
+        }[k]
+        mock_obj.get_data.return_value = b'image_data'
+
+        mock_xobjects = MagicMock()
+        mock_xobjects.__iter__.return_value = ['img1']
+        mock_xobjects.__getitem__.return_value = mock_obj
+
+        mock_resources = MagicMock()
+        mock_resources.get_object.return_value = mock_xobjects
+        mock_page.__getitem__.side_effect = lambda k: {
+            '/Resources': {'/XObject': mock_resources}
+        }[k]
+
+        mock_reader.pages = [mock_page]
+        mock_reader_class.return_value = mock_reader
+
+        result = dc.extract_images_from_pdf('input.pdf', './output', verbose=False)
+
+        assert len(result) > 0
+
+    def test_extract_images_no_dependencies(self):
+        """Test image extraction without required dependencies."""
+        with patch.dict('sys.modules', {'pypdf': None}):
+            result = dc.extract_images_from_pdf('input.pdf', './output')
+            assert result == []
+
+
+class TestMarkdownConversion:
+    """Test Markdown to PDF conversion."""
+
+    @patch('markdown.markdown')
+    @patch('builtins.open', create=True)
+    @patch('subprocess.run')
+    @patch('pathlib.Path.unlink')
+    def test_convert_markdown_success(self, mock_unlink, mock_run, mock_open, mock_markdown):
+        """Test successful Markdown to PDF conversion."""
+        mock_markdown.return_value = '<h1>Test</h1>'
+
+        # Mock file reading and writing
+        mock_file = MagicMock()
+        mock_file.__enter__.return_value.read.return_value = '# Test'
+        mock_open.return_value = mock_file
+
+        result = dc.convert_markdown_to_pdf('input.md', 'output.pdf', verbose=False)
+
+        assert result is True
+        mock_run.assert_called_once()
+
+    @patch('markdown.markdown')
+    @patch('builtins.open', create=True)
+    @patch('subprocess.run')
+    def test_convert_markdown_no_wkhtmltopdf(self, mock_run, mock_open, mock_markdown):
+        """Test Markdown conversion without wkhtmltopdf."""
+        mock_markdown.return_value = '<h1>Test</h1>'
+
+        mock_file = MagicMock()
+        mock_file.__enter__.return_value.read.return_value = '# Test'
+        mock_open.return_value = mock_file
+
+        mock_run.side_effect = FileNotFoundError()
+
+        result = dc.convert_markdown_to_pdf('input.md', 'output.pdf', verbose=False)
+
+        assert result is False
+
+    def test_convert_markdown_no_markdown_lib(self):
+        """Test Markdown conversion without markdown library."""
+        with patch.dict('sys.modules', {'markdown': None}):
+            result = dc.convert_markdown_to_pdf('input.md', 'output.pdf')
+            assert result is False
+
+
+class TestHTMLConversion:
+    """Test HTML to PDF conversion."""
+
+    @patch('subprocess.run')
+    def test_convert_html_success(self, mock_run):
+        """Test successful HTML to PDF conversion."""
+        result = dc.convert_html_to_pdf('input.html', 'output.pdf', verbose=False)
+
+        assert result is True
+        mock_run.assert_called_once()
+
+    @patch('subprocess.run')
+    def test_convert_html_no_wkhtmltopdf(self, mock_run):
+        """Test HTML conversion without wkhtmltopdf."""
+        mock_run.side_effect = FileNotFoundError()
+
+        result = dc.convert_html_to_pdf('input.html', 'output.pdf', verbose=False)
+
+        assert result is False
+
+
+class TestIntegration:
+    """Integration tests."""
+
+    @patch('pathlib.Path.exists')
+    def test_file_not_found(self, mock_exists):
+        """Test handling of non-existent input file."""
+        mock_exists.return_value = False
+
+        # This would normally be tested via main() but we test the concept
+        assert not Path('nonexistent.pdf').exists()
+
+    @patch('document_converter.check_dependencies')
+    def test_check_dependencies_integration(self, mock_check):
+        """Test dependency checking integration."""
+        mock_check.return_value = {
+            'pypdf': True,
+            'markdown': True,
+            'pillow': True
+        }
+
+        deps = dc.check_dependencies()
+
+        assert deps['pypdf'] is True
+        assert deps['markdown'] is True
+        assert deps['pillow'] is True
+
+
+if __name__ == '__main__':
+    pytest.main([__file__, '-v', '--cov=document_converter', '--cov-report=term-missing'])

skills/ai-multimodal/scripts/tests/test_gemini_batch_process.py

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+"""
+Tests for gemini_batch_process.py
+"""
+
+import pytest
+import sys
+from pathlib import Path
+from unittest.mock import Mock, patch, MagicMock
+
+# Add parent directory to path
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+import gemini_batch_process as gbp
+
+
+class TestAPIKeyFinder:
+    """Test API key detection."""
+
+    def test_find_api_key_from_env(self, monkeypatch):
+        """Test finding API key from environment variable."""
+        monkeypatch.setenv('GEMINI_API_KEY', 'test_key_123')
+        assert gbp.find_api_key() == 'test_key_123'
+
+    @patch('gemini_batch_process.load_dotenv')
+    def test_find_api_key_not_found(self, mock_load_dotenv, monkeypatch):
+        """Test when API key is not found."""
+        monkeypatch.delenv('GEMINI_API_KEY', raising=False)
+        # Mock load_dotenv to not actually load any files
+        mock_load_dotenv.return_value = None
+        assert gbp.find_api_key() is None
+
+
+class TestMimeTypeDetection:
+    """Test MIME type detection."""
+
+    def test_audio_mime_types(self):
+        """Test audio file MIME types."""
+        assert gbp.get_mime_type('test.mp3') == 'audio/mp3'
+        assert gbp.get_mime_type('test.wav') == 'audio/wav'
+        assert gbp.get_mime_type('test.aac') == 'audio/aac'
+        assert gbp.get_mime_type('test.flac') == 'audio/flac'
+
+    def test_image_mime_types(self):
+        """Test image file MIME types."""
+        assert gbp.get_mime_type('test.jpg') == 'image/jpeg'
+        assert gbp.get_mime_type('test.jpeg') == 'image/jpeg'
+        assert gbp.get_mime_type('test.png') == 'image/png'
+        assert gbp.get_mime_type('test.webp') == 'image/webp'
+
+    def test_video_mime_types(self):
+        """Test video file MIME types."""
+        assert gbp.get_mime_type('test.mp4') == 'video/mp4'
+        assert gbp.get_mime_type('test.mov') == 'video/quicktime'
+        assert gbp.get_mime_type('test.avi') == 'video/x-msvideo'
+
+    def test_document_mime_types(self):
+        """Test document file MIME types."""
+        assert gbp.get_mime_type('test.pdf') == 'application/pdf'
+        assert gbp.get_mime_type('test.txt') == 'text/plain'
+
+    def test_unknown_mime_type(self):
+        """Test unknown file extension."""
+        assert gbp.get_mime_type('test.xyz') == 'application/octet-stream'
+
+    def test_case_insensitive(self):
+        """Test case-insensitive extension matching."""
+        assert gbp.get_mime_type('TEST.MP3') == 'audio/mp3'
+        assert gbp.get_mime_type('Test.JPG') == 'image/jpeg'
+
+
+class TestFileUpload:
+    """Test file upload functionality."""
+
+    @patch('gemini_batch_process.genai.Client')
+    def test_upload_file_success(self, mock_client_class):
+        """Test successful file upload."""
+        # Mock client and file
+        mock_client = Mock()
+        mock_file = Mock()
+        mock_file.state.name = 'ACTIVE'
+        mock_file.name = 'test_file'
+        mock_client.files.upload.return_value = mock_file
+
+        result = gbp.upload_file(mock_client, 'test.jpg', verbose=False)
+
+        assert result == mock_file
+        mock_client.files.upload.assert_called_once_with(file='test.jpg')
+
+    @patch('gemini_batch_process.genai.Client')
+    @patch('gemini_batch_process.time.sleep')
+    def test_upload_video_with_processing(self, mock_sleep, mock_client_class):
+        """Test video upload with processing wait."""
+        mock_client = Mock()
+
+        # First call: PROCESSING, second call: ACTIVE
+        mock_file_processing = Mock()
+        mock_file_processing.state.name = 'PROCESSING'
+        mock_file_processing.name = 'test_video'
+
+        mock_file_active = Mock()
+        mock_file_active.state.name = 'ACTIVE'
+        mock_file_active.name = 'test_video'
+
+        mock_client.files.upload.return_value = mock_file_processing
+        mock_client.files.get.return_value = mock_file_active
+
+        result = gbp.upload_file(mock_client, 'test.mp4', verbose=False)
+
+        assert result.state.name == 'ACTIVE'
+
+    @patch('gemini_batch_process.genai.Client')
+    def test_upload_file_failed(self, mock_client_class):
+        """Test failed file upload."""
+        mock_client = Mock()
+        mock_file = Mock()
+        mock_file.state.name = 'FAILED'
+        mock_client.files.upload.return_value = mock_file
+        mock_client.files.get.return_value = mock_file
+
+        with pytest.raises(ValueError, match="File processing failed"):
+            gbp.upload_file(mock_client, 'test.mp4', verbose=False)
+
+
+class TestProcessFile:
+    """Test file processing functionality."""
+
+    @patch('gemini_batch_process.genai.Client')
+    @patch('builtins.open', create=True)
+    @patch('pathlib.Path.stat')
+    def test_process_small_file_inline(self, mock_stat, mock_open, mock_client_class):
+        """Test processing small file with inline data."""
+        # Mock small file
+        mock_stat.return_value.st_size = 10 * 1024 * 1024  # 10MB
+
+        # Mock file content
+        mock_open.return_value.__enter__.return_value.read.return_value = b'test_data'
+
+        # Mock client and response
+        mock_client = Mock()
+        mock_response = Mock()
+        mock_response.text = 'Test response'
+        mock_client.models.generate_content.return_value = mock_response
+
+        result = gbp.process_file(
+            client=mock_client,
+            file_path='test.jpg',
+            prompt='Describe this image',
+            model='gemini-2.5-flash',
+            task='analyze',
+            format_output='text',
+            verbose=False
+        )
+
+        assert result['status'] == 'success'
+        assert result['response'] == 'Test response'
+
+    @patch('gemini_batch_process.upload_file')
+    @patch('gemini_batch_process.genai.Client')
+    @patch('pathlib.Path.stat')
+    def test_process_large_file_api(self, mock_stat, mock_client_class, mock_upload):
+        """Test processing large file with File API."""
+        # Mock large file
+        mock_stat.return_value.st_size = 50 * 1024 * 1024  # 50MB
+
+        # Mock upload and response
+        mock_file = Mock()
+        mock_upload.return_value = mock_file
+
+        mock_client = Mock()
+        mock_response = Mock()
+        mock_response.text = 'Test response'
+        mock_client.models.generate_content.return_value = mock_response
+
+        result = gbp.process_file(
+            client=mock_client,
+            file_path='test.mp4',
+            prompt='Summarize this video',
+            model='gemini-2.5-flash',
+            task='analyze',
+            format_output='text',
+            verbose=False
+        )
+
+        assert result['status'] == 'success'
+        mock_upload.assert_called_once()
+
+    @patch('gemini_batch_process.genai.Client')
+    @patch('builtins.open', create=True)
+    @patch('pathlib.Path.stat')
+    def test_process_file_error_handling(self, mock_stat, mock_open, mock_client_class):
+        """Test error handling in file processing."""
+        mock_stat.return_value.st_size = 1024
+
+        # Mock file read
+        mock_file = MagicMock()
+        mock_file.__enter__.return_value.read.return_value = b'test_data'
+        mock_open.return_value = mock_file
+
+        mock_client = Mock()
+        mock_client.models.generate_content.side_effect = Exception("API Error")
+
+        result = gbp.process_file(
+            client=mock_client,
+            file_path='test.jpg',
+            prompt='Test',
+            model='gemini-2.5-flash',
+            task='analyze',
+            format_output='text',
+            verbose=False,
+            max_retries=1
+        )
+
+        assert result['status'] == 'error'
+        assert 'API Error' in result['error']
+
+    @patch('gemini_batch_process.genai.Client')
+    @patch('builtins.open', create=True)
+    @patch('pathlib.Path.stat')
+    def test_image_generation_with_aspect_ratio(self, mock_stat, mock_open, mock_client_class):
+        """Test image generation with aspect ratio config."""
+        mock_stat.return_value.st_size = 1024
+
+        # Mock file read
+        mock_file = MagicMock()
+        mock_file.__enter__.return_value.read.return_value = b'test'
+        mock_open.return_value = mock_file
+
+        mock_client = Mock()
+        mock_response = Mock()
+        mock_response.candidates = [Mock()]
+        mock_response.candidates[0].content.parts = [
+            Mock(inline_data=Mock(data=b'fake_image_data'))
+        ]
+        mock_client.models.generate_content.return_value = mock_response
+
+        result = gbp.process_file(
+            client=mock_client,
+            file_path='test.txt',
+            prompt='Generate mountain landscape',
+            model='gemini-2.5-flash-image',
+            task='generate',
+            format_output='text',
+            aspect_ratio='16:9',
+            verbose=False
+        )
+
+        # Verify config was called with correct structure
+        call_args = mock_client.models.generate_content.call_args
+        config = call_args.kwargs.get('config')
+        assert config is not None
+        assert result['status'] == 'success'
+        assert 'generated_image' in result
+
+
+class TestBatchProcessing:
+    """Test batch processing functionality."""
+
+    @patch('gemini_batch_process.find_api_key')
+    @patch('gemini_batch_process.process_file')
+    @patch('gemini_batch_process.genai.Client')
+    def test_batch_process_success(self, mock_client_class, mock_process, mock_find_key):
+        """Test successful batch processing."""
+        mock_find_key.return_value = 'test_key'
+        mock_process.return_value = {'status': 'success', 'response': 'Test'}
+
+        results = gbp.batch_process(
+            files=['test1.jpg', 'test2.jpg'],
+            prompt='Analyze',
+            model='gemini-2.5-flash',
+            task='analyze',
+            format_output='text',
+            verbose=False,
+            dry_run=False
+        )
+
+        assert len(results) == 2
+        assert all(r['status'] == 'success' for r in results)
+
+    @patch('gemini_batch_process.find_api_key')
+    def test_batch_process_no_api_key(self, mock_find_key):
+        """Test batch processing without API key."""
+        mock_find_key.return_value = None
+
+        with pytest.raises(SystemExit):
+            gbp.batch_process(
+                files=['test.jpg'],
+                prompt='Test',
+                model='gemini-2.5-flash',
+                task='analyze',
+                format_output='text',
+                verbose=False,
+                dry_run=False
+            )
+
+    @patch('gemini_batch_process.find_api_key')
+    def test_batch_process_dry_run(self, mock_find_key):
+        """Test dry run mode."""
+        # API key not needed for dry run, but we mock it to avoid sys.exit
+        mock_find_key.return_value = 'test_key'
+
+        results = gbp.batch_process(
+            files=['test1.jpg', 'test2.jpg'],
+            prompt='Test',
+            model='gemini-2.5-flash',
+            task='analyze',
+            format_output='text',
+            verbose=False,
+            dry_run=True
+        )
+
+        assert results == []
+
+
+class TestResultsSaving:
+    """Test results saving functionality."""
+
+    @patch('builtins.open', create=True)
+    @patch('json.dump')
+    def test_save_results_json(self, mock_json_dump, mock_open):
+        """Test saving results as JSON."""
+        results = [
+            {'file': 'test1.jpg', 'status': 'success', 'response': 'Test1'},
+            {'file': 'test2.jpg', 'status': 'success', 'response': 'Test2'}
+        ]
+
+        gbp.save_results(results, 'output.json', 'json')
+
+        mock_json_dump.assert_called_once()
+
+    @patch('builtins.open', create=True)
+    @patch('csv.DictWriter')
+    def test_save_results_csv(self, mock_csv_writer, mock_open):
+        """Test saving results as CSV."""
+        results = [
+            {'file': 'test1.jpg', 'status': 'success', 'response': 'Test1'},
+            {'file': 'test2.jpg', 'status': 'success', 'response': 'Test2'}
+        ]
+
+        gbp.save_results(results, 'output.csv', 'csv')
+
+        # Verify CSV writer was used
+        mock_csv_writer.assert_called_once()
+
+    @patch('builtins.open', create=True)
+    def test_save_results_markdown(self, mock_open):
+        """Test saving results as Markdown."""
+        mock_file = MagicMock()
+        mock_open.return_value.__enter__.return_value = mock_file
+
+        results = [
+            {'file': 'test1.jpg', 'status': 'success', 'response': 'Test1'},
+            {'file': 'test2.jpg', 'status': 'error', 'error': 'Failed'}
+        ]
+
+        gbp.save_results(results, 'output.md', 'markdown')
+
+        # Verify write was called
+        assert mock_file.write.call_count > 0
+
+
+if __name__ == '__main__':
+    pytest.main([__file__, '-v', '--cov=gemini_batch_process', '--cov-report=term-missing'])

skills/ai-multimodal/scripts/tests/test_media_optimizer.py

@@ -0,0 +1,373 @@
+"""
+Tests for media_optimizer.py
+"""
+
+import pytest
+import sys
+from pathlib import Path
+from unittest.mock import Mock, patch, MagicMock
+import json
+
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+import media_optimizer as mo
+
+
+class TestEnvLoading:
+    """Test environment variable loading."""
+
+    @patch('media_optimizer.load_dotenv')
+    @patch('pathlib.Path.exists')
+    def test_load_env_files_success(self, mock_exists, mock_load_dotenv):
+        """Test successful .env file loading."""
+        mock_exists.return_value = True
+        mo.load_env_files()
+        # Should be called for skill, skills, and claude dirs
+        assert mock_load_dotenv.call_count >= 1
+
+    @patch('media_optimizer.load_dotenv', None)
+    def test_load_env_files_no_dotenv(self):
+        """Test when dotenv is not available."""
+        # Should not raise an error
+        mo.load_env_files()
+
+
+class TestFFmpegCheck:
+    """Test ffmpeg availability checking."""
+
+    @patch('subprocess.run')
+    def test_ffmpeg_installed(self, mock_run):
+        """Test when ffmpeg is installed."""
+        mock_run.return_value = Mock()
+        assert mo.check_ffmpeg() is True
+
+    @patch('subprocess.run')
+    def test_ffmpeg_not_installed(self, mock_run):
+        """Test when ffmpeg is not installed."""
+        mock_run.side_effect = FileNotFoundError()
+        assert mo.check_ffmpeg() is False
+
+    @patch('subprocess.run')
+    def test_ffmpeg_error(self, mock_run):
+        """Test ffmpeg command error."""
+        mock_run.side_effect = Exception("Error")
+        assert mo.check_ffmpeg() is False
+
+
+class TestMediaInfo:
+    """Test media information extraction."""
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('subprocess.run')
+    def test_get_video_info(self, mock_run, mock_check):
+        """Test extracting video information."""
+        mock_check.return_value = True
+
+        mock_result = Mock()
+        mock_result.stdout = json.dumps({
+            'format': {
+                'size': '10485760',
+                'duration': '120.5',
+                'bit_rate': '691200'
+            },
+            'streams': [
+                {
+                    'codec_type': 'video',
+                    'width': 1920,
+                    'height': 1080,
+                    'r_frame_rate': '30/1'
+                },
+                {
+                    'codec_type': 'audio',
+                    'sample_rate': '48000',
+                    'channels': 2
+                }
+            ]
+        })
+        mock_run.return_value = mock_result
+
+        info = mo.get_media_info('test.mp4')
+
+        assert info['size'] == 10485760
+        assert info['duration'] == 120.5
+        assert info['width'] == 1920
+        assert info['height'] == 1080
+        assert info['sample_rate'] == 48000
+
+    @patch('media_optimizer.check_ffmpeg')
+    def test_get_media_info_no_ffmpeg(self, mock_check):
+        """Test when ffmpeg is not available."""
+        mock_check.return_value = False
+        info = mo.get_media_info('test.mp4')
+        assert info == {}
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('subprocess.run')
+    def test_get_media_info_error(self, mock_run, mock_check):
+        """Test error handling in media info extraction."""
+        mock_check.return_value = True
+        mock_run.side_effect = Exception("Error")
+
+        info = mo.get_media_info('test.mp4')
+        assert info == {}
+
+
+class TestVideoOptimization:
+    """Test video optimization functionality."""
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('media_optimizer.get_media_info')
+    @patch('subprocess.run')
+    def test_optimize_video_success(self, mock_run, mock_info, mock_check):
+        """Test successful video optimization."""
+        mock_check.return_value = True
+        mock_info.side_effect = [
+            # Input info
+            {
+                'size': 50 * 1024 * 1024,
+                'duration': 120.0,
+                'bit_rate': 3500000,
+                'width': 1920,
+                'height': 1080
+            },
+            # Output info
+            {
+                'size': 25 * 1024 * 1024,
+                'duration': 120.0,
+                'width': 1920,
+                'height': 1080
+            }
+        ]
+
+        result = mo.optimize_video(
+            'input.mp4',
+            'output.mp4',
+            quality=23,
+            verbose=False
+        )
+
+        assert result is True
+        mock_run.assert_called_once()
+
+    @patch('media_optimizer.check_ffmpeg')
+    def test_optimize_video_no_ffmpeg(self, mock_check):
+        """Test video optimization without ffmpeg."""
+        mock_check.return_value = False
+
+        result = mo.optimize_video('input.mp4', 'output.mp4')
+        assert result is False
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('media_optimizer.get_media_info')
+    def test_optimize_video_no_info(self, mock_info, mock_check):
+        """Test video optimization when info cannot be read."""
+        mock_check.return_value = True
+        mock_info.return_value = {}
+
+        result = mo.optimize_video('input.mp4', 'output.mp4')
+        assert result is False
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('media_optimizer.get_media_info')
+    @patch('subprocess.run')
+    def test_optimize_video_with_target_size(self, mock_run, mock_info, mock_check):
+        """Test video optimization with target size."""
+        mock_check.return_value = True
+        mock_info.side_effect = [
+            {'size': 100 * 1024 * 1024, 'duration': 60.0, 'bit_rate': 3500000},
+            {'size': 50 * 1024 * 1024, 'duration': 60.0}
+        ]
+
+        result = mo.optimize_video(
+            'input.mp4',
+            'output.mp4',
+            target_size_mb=50,
+            verbose=False
+        )
+
+        assert result is True
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('media_optimizer.get_media_info')
+    @patch('subprocess.run')
+    def test_optimize_video_with_resolution(self, mock_run, mock_info, mock_check):
+        """Test video optimization with custom resolution."""
+        mock_check.return_value = True
+        mock_info.side_effect = [
+            {'size': 50 * 1024 * 1024, 'duration': 120.0, 'bit_rate': 3500000},
+            {'size': 25 * 1024 * 1024, 'duration': 120.0}
+        ]
+
+        result = mo.optimize_video(
+            'input.mp4',
+            'output.mp4',
+            resolution='1280x720',
+            verbose=False
+        )
+
+        assert result is True
+
+
+class TestAudioOptimization:
+    """Test audio optimization functionality."""
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('media_optimizer.get_media_info')
+    @patch('subprocess.run')
+    def test_optimize_audio_success(self, mock_run, mock_info, mock_check):
+        """Test successful audio optimization."""
+        mock_check.return_value = True
+        mock_info.side_effect = [
+            {'size': 10 * 1024 * 1024, 'duration': 300.0},
+            {'size': 5 * 1024 * 1024, 'duration': 300.0}
+        ]
+
+        result = mo.optimize_audio(
+            'input.mp3',
+            'output.m4a',
+            bitrate='64k',
+            verbose=False
+        )
+
+        assert result is True
+        mock_run.assert_called_once()
+
+    @patch('media_optimizer.check_ffmpeg')
+    def test_optimize_audio_no_ffmpeg(self, mock_check):
+        """Test audio optimization without ffmpeg."""
+        mock_check.return_value = False
+
+        result = mo.optimize_audio('input.mp3', 'output.m4a')
+        assert result is False
+
+
+class TestImageOptimization:
+    """Test image optimization functionality."""
+
+    @patch('PIL.Image.open')
+    @patch('pathlib.Path.stat')
+    def test_optimize_image_success(self, mock_stat, mock_image_open):
+        """Test successful image optimization."""
+        # Mock image
+        mock_resized = Mock()
+        mock_resized.mode = 'RGB'
+
+        mock_img = Mock()
+        mock_img.width = 3840
+        mock_img.height = 2160
+        mock_img.mode = 'RGB'
+        mock_img.resize.return_value = mock_resized
+        mock_image_open.return_value = mock_img
+
+        # Mock file sizes
+        mock_stat.return_value.st_size = 5 * 1024 * 1024
+
+        result = mo.optimize_image(
+            'input.jpg',
+            'output.jpg',
+            max_width=1920,
+            quality=85,
+            verbose=False
+        )
+
+        assert result is True
+        # Since image is resized, save is called on the resized image
+        mock_resized.save.assert_called_once()
+
+    @patch('PIL.Image.open')
+    @patch('pathlib.Path.stat')
+    def test_optimize_image_resize(self, mock_stat, mock_image_open):
+        """Test image resizing during optimization."""
+        mock_img = Mock()
+        mock_img.width = 3840
+        mock_img.height = 2160
+        mock_img.mode = 'RGB'
+        mock_resized = Mock()
+        mock_img.resize.return_value = mock_resized
+        mock_image_open.return_value = mock_img
+
+        mock_stat.return_value.st_size = 5 * 1024 * 1024
+
+        mo.optimize_image('input.jpg', 'output.jpg', max_width=1920, verbose=False)
+
+        mock_img.resize.assert_called_once()
+
+    @patch('PIL.Image.open')
+    @patch('pathlib.Path.stat')
+    def test_optimize_image_rgba_to_jpg(self, mock_stat, mock_image_open):
+        """Test converting RGBA to RGB for JPEG."""
+        mock_img = Mock()
+        mock_img.width = 1920
+        mock_img.height = 1080
+        mock_img.mode = 'RGBA'
+        mock_img.split.return_value = [Mock(), Mock(), Mock(), Mock()]
+        mock_image_open.return_value = mock_img
+
+        mock_stat.return_value.st_size = 1024 * 1024
+
+        with patch('PIL.Image.new') as mock_new:
+            mock_rgb = Mock()
+            mock_new.return_value = mock_rgb
+
+            mo.optimize_image('input.png', 'output.jpg', verbose=False)
+
+            mock_new.assert_called_once()
+
+    def test_optimize_image_no_pillow(self):
+        """Test image optimization without Pillow."""
+        with patch.dict('sys.modules', {'PIL': None}):
+            result = mo.optimize_image('input.jpg', 'output.jpg')
+            # Will fail to import but function handles it
+            assert result is False
+
+
+class TestVideoSplitting:
+    """Test video splitting functionality."""
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('media_optimizer.get_media_info')
+    @patch('subprocess.run')
+    @patch('pathlib.Path.mkdir')
+    def test_split_video_success(self, mock_mkdir, mock_run, mock_info, mock_check):
+        """Test successful video splitting."""
+        mock_check.return_value = True
+        mock_info.return_value = {'duration': 7200.0}  # 2 hours
+
+        result = mo.split_video(
+            'input.mp4',
+            './chunks',
+            chunk_duration=3600,  # 1 hour chunks
+            verbose=False
+        )
+
+        # Duration 7200s / 3600s = 2, +1 for safety = 3 chunks
+        assert len(result) == 3
+        assert mock_run.call_count == 3
+
+    @patch('media_optimizer.check_ffmpeg')
+    @patch('media_optimizer.get_media_info')
+    def test_split_video_short_duration(self, mock_info, mock_check):
+        """Test splitting video shorter than chunk duration."""
+        mock_check.return_value = True
+        mock_info.return_value = {'duration': 1800.0}  # 30 minutes
+
+        result = mo.split_video(
+            'input.mp4',
+            './chunks',
+            chunk_duration=3600,  # 1 hour
+            verbose=False
+        )
+
+        assert result == ['input.mp4']
+
+    @patch('media_optimizer.check_ffmpeg')
+    def test_split_video_no_ffmpeg(self, mock_check):
+        """Test video splitting without ffmpeg."""
+        mock_check.return_value = False
+
+        result = mo.split_video('input.mp4', './chunks')
+        assert result == []
+
+
+if __name__ == '__main__':
+    pytest.main([__file__, '-v', '--cov=media_optimizer', '--cov-report=term-missing'])