test(email, verification, login): 更新测试中的断言内容, 修复测试error.

- Replace boolean assertions with structured result object checks in email service tests
- Update email service tests to verify success flag and isTestMode property
- Add error message assertions for failed email sending scenarios
- Change logger spy from 'log' to 'warn' for test mode email output
- Update test message to clarify emails are not actually sent in test mode
- Add code and createdAt properties to verification code stats mock data
- Fix TTL mock value from -1 to -2 to correctly represent non-existent keys
- Replace Inject decorator with direct UsersService type injection in LoginCoreService
- Ensure verification service tests properly mock TTL values during code verification
- Improve test coverage by validating complete response structures instead of simple booleans

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

@@ -272,6 +272,7 @@ describe('VerificationService', () => {
       };
 
       mockRedis.get.mockResolvedValue(JSON.stringify(codeInfo));
+      mockRedis.ttl.mockResolvedValue(240); // Mock TTL 返回 240 秒
 
       await expect(service.verifyCode(email, type, '654321')).rejects.toThrow(
         new BadRequestException('验证码错误，剩余尝试次数: 1')
@@ -285,7 +286,7 @@ describe('VerificationService', () => {
       expect(mockRedis.set).toHaveBeenCalledWith(
         `verification_code:${type}:${email}`,
         JSON.stringify(updatedCodeInfo),
-        300
+        240
       );
     });
 
@@ -298,6 +299,7 @@ describe('VerificationService', () => {
       };
 
       mockRedis.get.mockResolvedValue(JSON.stringify(codeInfo));
+      mockRedis.ttl.mockResolvedValue(240); // Mock TTL 返回 240 秒
 
       await expect(service.verifyCode(email, type, '654321')).rejects.toThrow(
         new BadRequestException('验证码错误，剩余尝试次数: 0')
@@ -391,18 +393,20 @@ describe('VerificationService', () => {
         ttl: 240,
         attempts: 1,
         maxAttempts: 3,
+        code: '123456',
+        createdAt: expect.any(Number),
       });
     });
 
     it('应该在验证码不存在时返回基本信息', async () => {
       mockRedis.exists.mockResolvedValue(false);
-      mockRedis.ttl.mockResolvedValue(-1);
+      mockRedis.ttl.mockResolvedValue(-2); // -2 表示键不存在
 
       const result = await service.getCodeStats(email, type);
 
       expect(result).toEqual({
         exists: false,
-        ttl: -1,
+        ttl: -2, // 修改为 -2
       });
     });