Initial commit: JMESPath Testing Tool

- React-based web application for testing JMESPath expressions
- macOS-first containerization with Apple container command
- Bootstrap UI with real-time evaluation
- GitHub Actions CI/CD pipeline
- Docker fallback support
- Comprehensive documentation and development scripts

src/App.test.js

@@ -0,0 +1,22 @@
+import { render, screen } from '@testing-library/react';
+import App from './App';
+
+test('renders JMESPath Testing Tool title', () => {
+  render(<App />);
+  const titleElement = screen.getByText(/JMESPath Testing Tool/i);
+  expect(titleElement).toBeInTheDocument();
+});
+
+test('renders input areas', () => {
+  render(<App />);
+  const jmespathInput = screen.getByPlaceholderText(/Enter JMESPath expression/i);
+  const jsonInput = screen.getByPlaceholderText(/Enter JSON data here/i);
+  expect(jmespathInput).toBeInTheDocument();
+  expect(jsonInput).toBeInTheDocument();
+});
+
+test('renders result area', () => {
+  render(<App />);
+  const resultArea = screen.getByPlaceholderText(/Results will appear here/i);
+  expect(resultArea).toBeInTheDocument();
+});