Question

我想使用Spring定义一个自己的组件。

下面是我的代码：

MyPasswordEncoderConfig ：

@Configuration
@ComponentScan(basePackages = { "my.package" })
public class CryptoConfig {

    @Bean
    public PasswordEncoder getPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

}

MyPasswordEncoder ：

@Component
public class MyPasswordEncoder {

    @Autowired
    private PasswordEncoder passwordEncoder; // Defined in Spring Security.

    public String encode(String plainTextPassword) {
        return passwordEncoder.encode(plainTextPassword);
    }

    public boolean matches(String encodedPasswordA, String encodedPasswordB) {
        return passwordEncoder.matches(encodedPasswordA, encodedPasswordB);
    }

}

MyPasswordEncoderTest ：

@ContextConfiguration(classes = {MyPasswordEncoder.class, MyPasswordEncoderConfig.class})
@RunWith(SpringJUnit4ClassRunner.class)
public class MyPasswordEncoderTest {

    @Mock
    private PasswordEncoder passwordEncoder;

    @InjectMocks
    @Autowired
    private MyPasswordEncoder myPasswordEncoder;

    @Before
    public void init() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void testPasswordMatching() {
        String plainTextPassword = "ABCdef123@@@";
        String encodedPassword = myPasswordEncoder.encode(plainTextPassword);
        assertTrue(myPasswordEncoder.matches(plainTextPassword, encodedPassword));
    }
}

当我运行测试时，它失败了。使用标准输出检查结果，passwordEncoder.encode(plainTextPassword);返回空值。

我做错了什么？

更新

问题出在 PasswordEncoder 界面上。如果我用 BCryptPasswordEncoder 替换它，测试工作正常。

Answer 1

根据我从测试代码中收集的内容，您实际上想要测试MyPasswordEncoder的功能。那么为什么要使用嘲笑？为什么不在PasswordEncoder和MyPasswordEncoder使用@Autowired，如下面的代码所示：

@ContextConfiguration(classes = {MyPasswordEncoder.class, MyPasswordEncoderConfig.class})
@RunWith(SpringJUnit4ClassRunner.class)
public class MyPasswordEncoderTest {

        @Autowired
        private PasswordEncoder passwordEncoder;

        @Autowired
        private MyPasswordEncoder myPasswordEncoder;

        @Test
        public void testPasswordMatching() {
            String plainTextPassword = "ABCdef123@@@";
            String encodedPassword = myPasswordEncoder.encode(plainTextPassword);
            assertTrue(myPasswordEncoder.matches(plainTextPassword, encodedPassword));
        }
    }

如果您不想编写spring集成测试但只想进行简单的单元测试并且不想重构代码，可以编写以下代码：

public class MyPasswordEncoderTest {

    private PasswordEncoder passwordEncoder = new BCryptPasswordEncoder();

    private MyPasswordEncoder myPasswordEncoder = new MyPasswordEncoder();

    @Before
    public void init() {
        ReflectionTestUtils.setField(myPasswordEncoder, "passwordEncoder", passwordEncoder);
    }

    @Test
    public void testPasswordMatching() {
        String plainTextPassword = "ABCdef123@@@";
        String encodedPassword = myPasswordEncoder.encode(plainTextPassword);
        assertTrue(myPasswordEncoder.matches(plainTextPassword, encodedPassword));
    }
}

一个更好的解决方案（抛弃使用Spring ReflectionTestUtils）就像重构MyPasswordEncoder一样：

@Component
public class MyPasswordEncoder {

    private final PasswordEncoder passwordEncoder; // Defined in Spring Security.

    @Autowired
    public MyPasswordEncoder(PasswordEncoder passwordEncoder) {
        this.passwordEncoder = passwordEncoder;
    }

    public String encode(String plainTextPassword) {
        return passwordEncoder.encode(plainTextPassword);
    }

    public boolean matches(String encodedPasswordA, String encodedPasswordB) {
        return passwordEncoder.matches(encodedPasswordA, encodedPasswordB);
    }

}

然后单元测试将成为：

public class MyPasswordEncoderTest {

    private MyPasswordEncoder myPasswordEncoder = new MyPasswordEncoder(new BCryptPasswordEncoder());

    @Test
    public void testPasswordMatching() {
        String plainTextPassword = "ABCdef123@@@";
        String encodedPassword = myPasswordEncoder.encode(plainTextPassword);
        assertTrue(myPasswordEncoder.matches(plainTextPassword, encodedPassword));
    }
}

Answer 2

这里的问题是，由于@InjectMocks，正在注入的实际PasswordEncoder是@Mock

@Mock
private PasswordEncoder passwordEncoder;

不是@Configuration课程中的那个。（实际上，两者都是注入的，但模拟是最后注入的，因此是使用的那个。）你可以用（如果字段可见）验证这一点。

System.out.println(MyPasswordEncoder.passwordEncoder.getClass());

会打印类似

的内容

class com.spring.PasswordEncoder$$EnhancerByMockitoWithCGLIB$$7d70b580
// pay attention to               ^        this part       ^

通常实现模拟以返回引用类型null，数字基元返回0，布尔值返回false。

定义Spring组件时出错

2 个答案: