feat: add testing using vitest

src/__tests__/commands.test.ts

@@ -0,0 +1,52 @@
+import { describe, it, expect, vi } from 'vitest';
+import path from 'path';
+import fs from 'fs';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+describe('Command Loading', () => {
+  it('all command files should export a valid definition', async () => {
+    const commandsDir = path.resolve(__dirname, '../commands');
+    
+    function getCommandFiles(dir: string): string[] {
+      const files = fs.readdirSync(dir);
+      let commandFiles: string[] = [];
+
+      for (const file of files) {
+        const fullPath = path.join(dir, file);
+        if (fs.statSync(fullPath).isDirectory()) {
+          commandFiles = commandFiles.concat(getCommandFiles(fullPath));
+        } else if (file.endsWith('.ts') || file.endsWith('.js')) {
+          commandFiles.push(fullPath);
+        }
+      }
+
+      return commandFiles;
+    }
+
+    const files = getCommandFiles(commandsDir);
+    expect(files.length).toBeGreaterThan(0);
+
+    for (const file of files) {
+      // Use dynamic import to check the module
+      // We convert absolute path to file:// URL for ESM import on Linux/Windows
+      const module = await import(`file://${file}`);
+      
+      const definition = module.default || Object.values(module).find((val: any) => 
+        val && typeof val === 'object' && val.name && typeof val.action === 'function'
+      );
+
+      if (!definition) {
+        throw new Error(`Command file ${file} does not export a valid command definition (needs name and action function)`);
+      }
+
+      expect(definition).toBeDefined();
+      expect(typeof definition.name).toBe('string');
+      expect(typeof definition.action).toBe('function');
+      
+      console.log(`✓ Validated command: ${definition.name} (${path.relative(commandsDir, file)})`);
+    }
+  });
+});

src/__tests__/config.test.ts

@@ -0,0 +1,11 @@
+import { describe, it, expect, vi } from 'vitest';
+import path from 'path';
+import os from 'os';
+import { getConfigPath } from '../config.js';
+
+describe('config', () => {
+  it('should return the correct config path', () => {
+    const expectedPath = path.join(os.homedir(), '.shsf_config');
+    expect(getConfigPath()).toBe(expectedPath);
+  });
+});