src/test/java/com/example/g8backend/util/JwtUtilTest.java

package com.example.g8backend.util;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.InjectMocks;
import org.mockito.MockitoAnnotations;
import static org.junit.jupiter.api.Assertions.*;
import io.jsonwebtoken.security.Keys;
import javax.crypto.SecretKey;
import java.security.SecureRandom;

class JwtUtilTest {

    @InjectMocks
    private JwtUtil jwtUtil;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
        byte[] keyBytes = new byte[32];
        new SecureRandom().nextBytes(keyBytes);
        SecretKey secretKey = Keys.hmacShaKeyFor(keyBytes);
        jwtUtil = new JwtUtil(secretKey);
    }

    @Test
    void testGenerateToken() {
        long userId = 1L;
        String token = jwtUtil.generateToken(userId);
        assertNotNull(token);
    }

    @Test
    void testValidateTokenAndGetUserId() {
        long userId = 1L;
        String token = jwtUtil.generateToken(userId);
        long extractedUserId = jwtUtil.validateTokenAndGetUserId(token);
        assertEquals(userId, extractedUserId);
    }

    @Test
    void testValidateTokenAndGetUsername_InvalidToken() {
        String invalidToken = "invalid.token.here";
        Exception exception = assertThrows(RuntimeException.class, () ->
                jwtUtil.validateTokenAndGetUserId(invalidToken)
        );
        assertTrue(exception.getMessage().contains("Token无效或过期"));
    }
}