test：添加验证码冷却时间清除功能测试

为新增的验证码冷却时间清除功能添加全面的测试用例：

验证服务测试：
- 测试成功清除冷却时间
- 测试清除不存在的冷却时间
- 测试Redis操作错误处理
- 测试不同类型和标识符的冷却时间清除

登录核心服务测试：
- 测试注册成功后自动清除冷却时间
- 测试密码重置成功后自动清除冷却时间
- 测试验证码登录成功后自动清除冷却时间
- 测试冷却时间清除失败的优雅处理

src/core/utils/verification/verification.service.spec.ts

@@ -587,4 +587,69 @@ describe('VerificationService', () => {
       expect(code).toMatch(/^\d{6}$/);
     });
   });
+
+  describe('clearCooldown', () => {
+    it('应该成功清除验证码冷却时间', async () => {
+      const email = 'test@example.com';
+      const type = VerificationCodeType.EMAIL_VERIFICATION;
+
+      mockRedis.del.mockResolvedValue(true);
+
+      await service.clearCooldown(email, type);
+
+      expect(mockRedis.del).toHaveBeenCalledWith(`verification_cooldown:${type}:${email}`);
+    });
+
+    it('应该处理清除不存在的冷却时间', async () => {
+      const email = 'test@example.com';
+      const type = VerificationCodeType.EMAIL_VERIFICATION;
+
+      mockRedis.del.mockResolvedValue(false);
+
+      await service.clearCooldown(email, type);
+
+      expect(mockRedis.del).toHaveBeenCalledWith(`verification_cooldown:${type}:${email}`);
+    });
+
+    it('应该处理Redis删除操作错误', async () => {
+      const email = 'test@example.com';
+      const type = VerificationCodeType.EMAIL_VERIFICATION;
+
+      mockRedis.del.mockRejectedValue(new Error('Redis delete failed'));
+
+      await expect(service.clearCooldown(email, type)).rejects.toThrow('Redis delete failed');
+    });
+
+    it('应该为不同类型的验证码清除对应的冷却时间', async () => {
+      const email = 'test@example.com';
+      const types = [
+        VerificationCodeType.EMAIL_VERIFICATION,
+        VerificationCodeType.PASSWORD_RESET,
+        VerificationCodeType.SMS_VERIFICATION,
+      ];
+
+      mockRedis.del.mockResolvedValue(true);
+
+      for (const type of types) {
+        await service.clearCooldown(email, type);
+        expect(mockRedis.del).toHaveBeenCalledWith(`verification_cooldown:${type}:${email}`);
+      }
+
+      expect(mockRedis.del).toHaveBeenCalledTimes(types.length);
+    });
+
+    it('应该为不同标识符清除对应的冷却时间', async () => {
+      const identifiers = ['test1@example.com', 'test2@example.com', '+8613800138000'];
+      const type = VerificationCodeType.EMAIL_VERIFICATION;
+
+      mockRedis.del.mockResolvedValue(true);
+
+      for (const identifier of identifiers) {
+        await service.clearCooldown(identifier, type);
+        expect(mockRedis.del).toHaveBeenCalledWith(`verification_cooldown:${type}:${identifier}`);
+      }
+
+      expect(mockRedis.del).toHaveBeenCalledTimes(identifiers.length);
+    });
+  });
 });