如何在JUnit 5 Java中模拟JsonWebToken库

Question

我有一个返回JsonWebToken的身份验证服务

首先，它验证提供的令牌，读取声明，然后基于该数据生成一个新的声明

以下是完成特定任务的方法：

@Override
    public String authenticate(String appName, String zendeskJwt) {
        String zendeskPublicKeyString = zendeskService.getAppPublicKey(appName);
        RSAPublicKey zendeskPublicKey = asymmetricKeyParser.publicKey(zendeskPublicKeyString);
        Jws<Claims> parsedZendeskJws = Jwts.parserBuilder()
                .setSigningKey(zendeskPublicKey)
                .build()
                .parseClaimsJws(zendeskJwt);

        String zendeskUserReference = parsedZendeskJws.getBody().getSubject();
        ZendeskUser zendeskUser = zendeskService.getZendeskUser(zendeskUserReference);

        Date currentTime = new Date(System.currentTimeMillis());
        Date expirationTime = new Date(currentTime.getTime() + cspExciteJwtProperties.getExpirationDuration().toMillis());

        RSAPrivateKey cspPrivateKey = asymmetricKeyParser.privateKey(cspExciteJwtProperties.getPrivateKey());

        return Jwts.builder()
                .setIssuedAt(currentTime)
                .setExpiration(expirationTime)
                .claim(CLAIM_ZENDESK_AGENT_ID, zendeskUser.getId())
                .claim(CLAIM_HYDRA_USER_ID, zendeskUser.getExternalId())
                .signWith(cspPrivateKey)
                .compact();

    }

代码本身运行良好。我的问题是关于单元测试的。我想测试一下这个方法

我试着检查了很多材料，但都不适合我。 根据消息来源，每个人都说嘲笑图书馆本身不是一个好主意。 但我不太确定如何在不模仿Jwt库的情况下通过单元测试。 我有集成测试，这是另一种情况。对于单元测试，我不应该提出任何真正的请求

以下是我迄今为止所做的尝试

   private RSAPrivateKey privateKey() throws NoSuchAlgorithmException, InvalidKeySpecException {
        String parsedPrivateKey = PRIVATE_KEY
                .replace("-----BEGIN PRIVATE KEY-----", "")
                .replace("-----END PRIVATE KEY-----", "")
                .replaceAll("\\n", "").trim();
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        var decoded = Base64.getDecoder().decode(parsedPrivateKey);
        PKCS8EncodedKeySpec keySpecPKCS8 = new PKCS8EncodedKeySpec(decoded);

        return (RSAPrivateKey) keyFactory.generatePrivate(keySpecPKCS8);
    }

    private String generateJwt() throws InvalidKeySpecException, NoSuchAlgorithmException {
        RSAPrivateKey cspPrivateKey = privateKey();
        System.out.println(cspPrivateKey);
        Duration expirationDuration = Duration.parse("PT20M");
        Date currentTime = new Date(System.currentTimeMillis());
        Date expirationTime = new Date(currentTime.getTime() + expirationDuration.toMillis());

        return Jwts.builder()
                .setIssuedAt(currentTime)
                .setExpiration(expirationTime)
                .claim(CLAIM_ZENDESK_AGENT_ID, 123)
                .claim(CLAIM_HYDRA_USER_ID, "123")
                .signWith(cspPrivateKey)
                .compact();
    }

    @Test
    void authenticate() throws InvalidKeySpecException, NoSuchAlgorithmException {
        String appName = "appName";
        String zendeskJwt = generateJwt();
        RSAPublicKey zendeskPublicKey = new AsymmetricKeyParser().publicKey(PUBLIC_KEY);
        ZendeskUser zendeskUser = new ZendeskUser(123, "123");

        Jws<Claims> jws = new Jws<Claims>() {

            @Override
            public JwsHeader getHeader() {
                return null;
            }

            @Override
            public Claims getBody() {
                return null;
            }

            @SneakyThrows
            @Override
            public String getSignature() {
                return generateJwt();
            }
        };

        when(zendeskService.getAppPublicKey(appName)).thenReturn(String.valueOf(zendeskPublicKey));
        // This is how I am trying to mock JWT
        when(Jwts.parserBuilder()
                .setSigningKey(zendeskPublicKey)
                .build()
                .parseClaimsJws(zendeskJwt)).thenReturn(jws);

        when(zendeskService.getZendeskUser("//example.com")).thenReturn(zendeskUser);

        testObj.authenticate(appName, zendeskJwt);
    }

它给了我这个错误

org.mockito.exceptions.misusing.MissingMethodInvocationException: 
when() requires an argument which has to be 'a method call on a mock'.
For example:
    when(mock.getArticles()).thenReturn(articles);

Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
   Those methods *cannot* be stubbed/verified.
   Mocking methods declared on non-public parent classes is not supported.
2. inside when() you don't call method on mock but on some other object.

欢迎提出任何建议