如何使用Mockito框架模拟我的服务

Question

你好，我已经按照下面的方法编写了一个模拟测试；

我下面的代码；

@Component
public class CodeConfigBuilder {
@Value("${promoConfig.prefix.length}")
private Integer prefixLength;
public void validateRequestAndSetDefaults(PromoRequest promoRequest) {
prefixAndPostFixControlAccordingToLength(promoRequest);
}
private void prefixAndPostFixControlAccordingToLength(PromoRequest promoRequest) {
if (promoRequest.getPostfix() != null) {
int lengthControl = prefixLength + promoRequest.getPostfix().length();
if (lengthControl >= promoRequest.getLength()) {
throw new BadRequestException(Constant.ClientConstants.THE_SUM_OF_PREFIX_AND_POSTFIX_CAN_NOT_BE_GREATER_THAN_LENGHT);
}
}    
}
}

下面是我的yml配置；

#=========  Promo  Config  ========== #

promoConfig:
prefix:
length: 3

我在下面的服务；

public void validateRequest(PromoRequest promoRequest) {

codeConfigBuilder.validateRequestAndSetDefaults(promoRequest);
}

我有一个创建的PropertySourceResolver类

@Component
@Getter
public class PropertySourceResolver {
private int prefixLength = 3;

下面是我的测试班；

@RunWith(MockitoJUnitRunner.class)
class CodeConfigBuilderTest {
@MockBean
private PropertySourceResolver propertySourceResolver = new PropertySourceResolver();
@InjectMocks
private PromoRequest promoRequest = new PromoRequest();
@InjectMocks
private PromoService Service;
@Before
public void init() {
promoRequest.setPrefix("ABC");
promoRequest.setPostfix("ABCDABCD");
promoRequest.setQuantity(10);
promoRequest.setLength(12);
promoRequest.setCharset("ABCDEF");
}
@Test
public void prefixAndPostFixControl_accordingToLength_for_Succeed() {
int lengthControl = promoRequest.getPrefix().length() + promoRequest.getPostfix().length();
if (lengthControl >= promoRequest.getLength()) {
Assert.assertTrue(false);
}
}

我喜欢根据测试场景更改我的代码，比如；什么时候那你有什么想法吗？非常感谢。

Answer 1

为了简化和更好地组织代码，通过创建以下类来抽象注入配置的复杂性：

@ConfigurationProperties(prefix = "promoConfig.prefix")
public class PromoPrefixConfiguration {
private Integer length;
public Integer getLength() {
return length;
}
}

然后，您应该将其作为CodeConfigBuilder:的依赖项

@Component
public class CodeConfigBuilder {
private Integer prefixLength;
public CodeConfigBuilder(PromoPrefixConfiguration promoPrefixConfiguration) {
this.prefixLength = promoPrefixConfiguration.getLength();
}
public void validateRequestAndSetDefaults(PromoRequest promoRequest) {
prefixAndPostFixControlAccordingToLength(promoRequest);
}
private void prefixAndPostFixControlAccordingToLength(PromoRequest promoRequest) {
if (promoRequest.getPostfix() != null) {
int lengthControl = prefixLength + promoRequest.getPostfix().length();
if (lengthControl >= promoRequest.getLength()) {
throw new BadRequestException(Constant.ClientConstants.THE_SUM_OF_PREFIX_AND_POSTFIX_CAN_NOT_BE_GREATER_THAN_LENGHT);
}
}    
}
}

现在，为了测试这个类，你必须进行三个测试：

1. 测试PromoRequest是否有效，因为postfix为空
2. 测试PromoRequest是否有效，因为长度是有效的
3. 测试PromoRequest由于长度无效而无效

它们可能如下所示：

class CodeConfigBuilderTest {
private PromoPrefixConfiguration promoPrefixConfiguration = new PromoPrefixConfiguration(10);
private CodeConfigBuilder codeConfigBuilder = new CodeConfigBuilder(promoPrefixConfiguration);
@Test
public void promoRequestIsValidGivenNullPostfix() {
// Arrange
PromoRequest promoRequest = new PromoRequest();
promoRequest.setPostfix(null);
// Act
codeConfigBuilder.validateRequestAndSetDefaults(promoRequest);
}
@Test
public void promoRequestIsValidGivenValidPrefixPlusPostfixLength() {
// Arrange
PromoRequest promoRequest = new PromoRequest();
promoRequest.setPostfix("ABCD");
promoRequest.setLength(15);
// Act
codeConfigBuilder.validateRequestAndSetDefaults(promoRequest);
}
@Test(expected = BadRequestException.class)
public void promoRequestIsInvalidGivenInvalidPrefixPlusPostfixLength() {
// Arrange
PromoRequest promoRequest = new PromoRequest();
promoRequest.setPostfix("ABCDEFGH");
promoRequest.setLength(15);
// Act
codeConfigBuilder.validateRequestAndSetDefaults(promoRequest);
}
}

如果您使用的是JUnit5，您可以用下面的测试来替换最后一个测试，以便轻松地断言异常消息：

@Test
public void promoRequestIsInvalidGivenInvalidPrefixPlusPostfixLength() {
// Arrange
PromoRequest promoRequest = new PromoRequest();
promoRequest.setPrefix("ABCDEFG");
promoRequest.setPostfix("HIJKLMN");
// Act 
Exception exception = assertThrows(BadRequestException.class, () -> {
codeConfigBuilder.validateRequestAndSetDefaults(promoRequest);
});
// Assert
String exceptionMessage = exception.getMessage();
assertTrue(exceptionMessage.equals(Constant.ClientConstants.THE_SUM_OF_PREFIX_AND_POSTFIX_CAN_NOT_BE_GREATER_THAN_LENGHT));
}

第页。S.：你是说suffix而不是postfix吗？