test: add initial testing and linting (#18)

tests/execute.test.ts

@@ -0,0 +1,23 @@
+import { resolve } from 'path';
+
+import { describe, it, expect, beforeAll, afterEach, afterAll } from 'vitest';
+
+import { Context, execute } from '../src/exports.js';
+
+import { server } from './mocks/node.js';
+
+describe('execute', () => {
+  beforeAll(() => server.listen());
+  afterEach(() => server.resetHandlers());
+  afterAll(() => server.close());
+
+  it('should correctly render the readme file', async () => {
+    const context = new Context();
+    const filePath = resolve(__dirname, '..', 'docs', 'README.md');
+    const result = await execute(filePath, {
+      context,
+    });
+
+    expect(result.markdown).toMatchSnapshot();
+  }, 30000);
+});