Initial commit: Inventory Barcode System

__tests__/database.test.js

@@ -0,0 +1,80 @@
+const DatabaseManager = require('../models/database');
+const fs = require('fs');
+const path = require('path');
+
+describe('Database Manager', () => {
+  const testDbPath = path.join(__dirname, '..', 'test_inventory.db');
+
+  beforeEach(() => {
+    // Clean up any existing test database
+    if (fs.existsSync(testDbPath)) {
+      fs.unlinkSync(testDbPath);
+    }
+    
+    // Override the database path for testing
+    DatabaseManager.dbPath = testDbPath;
+  });
+
+  afterEach(() => {
+    DatabaseManager.close();
+    
+    // Clean up test database
+    if (fs.existsSync(testDbPath)) {
+      fs.unlinkSync(testDbPath);
+    }
+  });
+
+  test('should initialize database successfully', () => {
+    expect(() => {
+      DatabaseManager.initialize();
+    }).not.toThrow();
+    
+    expect(DatabaseManager.getDatabase()).toBeDefined();
+  });
+
+  test('should create tables with correct schema', () => {
+    DatabaseManager.initialize();
+    const db = DatabaseManager.getDatabase();
+    
+    // Check if items table exists
+    const itemsTable = db.prepare("SELECT name FROM sqlite_master WHERE type='table' AND name='items'").get();
+    expect(itemsTable).toBeDefined();
+    
+    // Check if transactions table exists
+    const transactionsTable = db.prepare("SELECT name FROM sqlite_master WHERE type='table' AND name='transactions'").get();
+    expect(transactionsTable).toBeDefined();
+  });
+
+  test('should create indexes correctly', () => {
+    DatabaseManager.initialize();
+    const db = DatabaseManager.getDatabase();
+    
+    // Check if indexes exist
+    const indexes = db.prepare("SELECT name FROM sqlite_master WHERE type='index'").all();
+    const indexNames = indexes.map(idx => idx.name);
+    
+    expect(indexNames).toContain('idx_items_barcode');
+    expect(indexNames).toContain('idx_items_name');
+    expect(indexNames).toContain('idx_transactions_item_id');
+    expect(indexNames).toContain('idx_transactions_created_at');
+  });
+
+  test('should handle transaction execution', () => {
+    DatabaseManager.initialize();
+    const db = DatabaseManager.getDatabase();
+    
+    const result = DatabaseManager.executeTransaction(() => {
+      const insert = db.prepare('INSERT INTO items (name, quantity) VALUES (?, ?)');
+      return insert.run('Test Item', 10);
+    });
+    
+    expect(result.changes).toBe(1);
+    expect(result.lastInsertRowid).toBeDefined();
+  });
+
+  test('should throw error when accessing uninitialized database', () => {
+    expect(() => {
+      DatabaseManager.getDatabase();
+    }).toThrow('Database not initialized. Call initialize() first.');
+  });
+});