chore: prepare project for server deployment

tests/Entity.test.js

@@ -0,0 +1,62 @@
+const Entity = require('../src/models/Entity');
+const { getDb, closeDb } = require('../src/config/database');
+const { migrate } = require('../src/database/migrate');
+
+beforeAll(() => {
+  migrate();
+});
+
+afterAll(() => {
+  closeDb();
+});
+
+describe('Entity Model', () => {
+  let entityId;
+  
+  test('应该创建实体', () => {
+    const entity = Entity.create({
+      name: '测试实体',
+      definition: '这是一个测试实体',
+      description: '测试实体的描述'
+    });
+    
+    expect(entity).toBeDefined();
+    expect(entity.entity_id).toBeDefined();
+    expect(entity.name).toBe('测试实体');
+    expect(entity.definition).toBe('这是一个测试实体');
+    expect(entity.description).toBe('测试实体的描述');
+    
+    entityId = entity.entity_id;
+  });
+  
+  test('应该根据ID查找实体', () => {
+    const entity = Entity.findById(entityId);
+    expect(entity).toBeDefined();
+    expect(entity.entity_id).toBe(entityId);
+    expect(entity.name).toBe('测试实体');
+  });
+  
+  test('应该更新实体', () => {
+    const updatedEntity = Entity.update(entityId, {
+      name: '更新后的实体',
+      description: '更新后的描述'
+    });
+    
+    expect(updatedEntity.name).toBe('更新后的实体');
+    expect(updatedEntity.description).toBe('更新后的描述');
+  });
+  
+  test('应该获取所有实体', () => {
+    const entities = Entity.findAll();
+    expect(Array.isArray(entities)).toBe(true);
+    expect(entities.length).toBeGreaterThan(0);
+  });
+  
+  test('应该删除实体', () => {
+    const result = Entity.delete(entityId);
+    expect(result.changes).toBe(1);
+    
+    const entity = Entity.findById(entityId);
+    expect(entity).toBeUndefined();
+  });
+});