由于自定义约束验证器，验证器单元测试失败
Validator unit test fails because of custom constraint validator
我正在为我的 DTO 的约束验证器编写测试。它们适用于每个 DTO，除了使用自定义编写 EmailUniqueConstraintValidator 的那个。发生此异常：
javax.validation.ValidationException: HV000028: Unexpected exception during isValid call.
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:177)
at org.hibernate.validator.internal.engine.constraintvalidation.SimpleConstraintTree.validateConstraints(SimpleConstraintTree.java:68)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:73)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.doValidateConstraint(MetaConstraint.java:127)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:120)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:533)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:496)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:465)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:430)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:380)
at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:169)
at be.ambrassade.jeugdlink.model.request.UserCreateRequestTest.passwordSizeTooShortOrLongReturnsValidationError(UserCreateRequestTest.java:71)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:532)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod(TestMethodTestDescriptor.java:171)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:167)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:114)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:59)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:108)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:112)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:112)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute(DefaultLauncher.java:188)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.NullPointerException
at be.ambrassade.jeugdlink.validation.EmailUniqueConstraintValidator.isValid(EmailUniqueConstraintValidator.java:33)
at be.ambrassade.jeugdlink.validation.EmailUniqueConstraintValidator.isValid(EmailUniqueConstraintValidator.java:21)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:171)
... 50 more
这是验证器：
import be.ambrassade.jeugdlink.repo.UserRepository;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
public class EmailUniqueConstraintValidator implements ConstraintValidator<EmailUnique, String> {
private UserRepository userRepository;
public EmailUniqueConstraintValidator(UserRepository userRepository) {
this.userRepository = userRepository;
}
@Override
public boolean isValid(String value, ConstraintValidatorContext context) {
return value == null || !userRepository.existsByEmail(value);
}
}
它没有 public no arg 构造函数，但是由于存储库依赖性，添加一个也不能解决问题。
由于该自定义验证器的问题，none 该 DTO 的验证测试有效。我该如何解决这个问题？
如果您再次阅读堆栈跟踪，您会注意到异常原因是 NullPointerException:
Caused by: java.lang.NullPointerException
at be.ambrassade.jeugdlink.validation.EmailUniqueConstraintValidator.isValid(EmailUniqueConstraintValidator.java:33)
所以问题的解决方法很简单，确保在isValid方法中访问它时userRepository字段值不为空。
测试套件代码不在问题中，但根据问题描述，这应该是我最近遇到的同一个问题。
可能有点晚了，但我会 post 我是如何解决这个问题的，因为它可以帮助其他人。
问题基本上是通过调用 Validation.buildDefaultValidatorFactory().getValidator() 获得的 Hibernate 标准 Validator 实现对 Spring 的应用程序上下文一无所知，因此它无法在您的自定义中注入依赖项约束验证器。
在 Spring 应用程序中，Validator 和 ValidatorFactory 接口的实现是 class LocalValidatorFactoryBean，它可以委托给 ApplicationContext 以注入依赖项来实例化约束验证器。
你需要做的是
- 用它们的（模拟的，我想）依赖关系实例化你的约束验证器
- 创建您自己的
ValidatorFactory，其中包含要点 1 中的所有约束验证器
- 从这样的工厂实例化你的
Validator
这是自定义验证器工厂
public class CustomLocalValidatorFactoryBean extends LocalValidatorFactoryBean {
private final List<ConstraintValidator<?, ?>> customConstraintValidators;
public CustomLocalValidatorFactoryBean(List<ConstraintValidator<?, ?>> customConstraintValidators) {
this.customConstraintValidators = customConstraintValidators;
setProviderClass(HibernateValidator.class);
afterPropertiesSet();
}
@Override
protected void postProcessConfiguration(Configuration<?> configuration) {
super.postProcessConfiguration(configuration);
ConstraintValidatorFactory defaultConstraintValidatorFactory =
configuration.getDefaultConstraintValidatorFactory();
configuration.constraintValidatorFactory(
new ConstraintValidatorFactory() {
@Override
public <T extends ConstraintValidator<?, ?>> T getInstance(Class<T> key) {
for (ConstraintValidator<?, ?> constraintValidator : customConstraintValidators) {
if (key.equals(constraintValidator.getClass())) //noinspection unchecked
return (T) constraintValidator;
}
return defaultConstraintValidatorFactory.getInstance(key);
}
@Override
public void releaseInstance(ConstraintValidator<?, ?> instance) {
defaultConstraintValidatorFactory
.releaseInstance(instance);
}
}
);
}
}
那么在你的测试中 class 你只需做这样的事情：
class MyTestSuite {
private final UserRepository mockUserRepository = Mockito.mock(UserRepository.class);
private final List<ConstraintValidator<?,?>> customConstraintValidators =
Collections.singletonList(new EmailUniqueConstraintValidator(mockUserRepository));
private final ValidatorFactory customValidatorFactory =
new CustomLocalValidatorFactoryBean(customConstraintValidators);
private final Validator validator = customValidatorFactory.getValidator();
@Test
void myTestCase() {
// mock the dependency: Mockito.when(mockUserRepository...)
User u = new User();
//setters omitted
Set<ConstraintViolation<?>> violations = validator.validate(u);
//assertions on the set of constraint violations
}
}
希望对您有所帮助。您可以查看我的 post 以获取更多详细信息：https://codemadeclear.com/index.php/2021/01/26/how-to-mock-dependencies-when-unit-testing-custom-validators/
我正在为我的 DTO 的约束验证器编写测试。它们适用于每个 DTO，除了使用自定义编写 EmailUniqueConstraintValidator 的那个。发生此异常：
javax.validation.ValidationException: HV000028: Unexpected exception during isValid call.
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:177)
at org.hibernate.validator.internal.engine.constraintvalidation.SimpleConstraintTree.validateConstraints(SimpleConstraintTree.java:68)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:73)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.doValidateConstraint(MetaConstraint.java:127)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:120)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:533)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:496)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:465)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:430)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:380)
at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:169)
at be.ambrassade.jeugdlink.model.request.UserCreateRequestTest.passwordSizeTooShortOrLongReturnsValidationError(UserCreateRequestTest.java:71)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:532)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod(TestMethodTestDescriptor.java:171)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:167)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:114)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:59)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:108)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:112)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:112)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute(DefaultLauncher.java:188)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.NullPointerException
at be.ambrassade.jeugdlink.validation.EmailUniqueConstraintValidator.isValid(EmailUniqueConstraintValidator.java:33)
at be.ambrassade.jeugdlink.validation.EmailUniqueConstraintValidator.isValid(EmailUniqueConstraintValidator.java:21)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:171)
... 50 more
这是验证器：
import be.ambrassade.jeugdlink.repo.UserRepository;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
public class EmailUniqueConstraintValidator implements ConstraintValidator<EmailUnique, String> {
private UserRepository userRepository;
public EmailUniqueConstraintValidator(UserRepository userRepository) {
this.userRepository = userRepository;
}
@Override
public boolean isValid(String value, ConstraintValidatorContext context) {
return value == null || !userRepository.existsByEmail(value);
}
}
它没有 public no arg 构造函数，但是由于存储库依赖性，添加一个也不能解决问题。
由于该自定义验证器的问题，none 该 DTO 的验证测试有效。我该如何解决这个问题？
如果您再次阅读堆栈跟踪，您会注意到异常原因是 NullPointerException:
Caused by: java.lang.NullPointerException
at be.ambrassade.jeugdlink.validation.EmailUniqueConstraintValidator.isValid(EmailUniqueConstraintValidator.java:33)
所以问题的解决方法很简单，确保在isValid方法中访问它时userRepository字段值不为空。
测试套件代码不在问题中，但根据问题描述，这应该是我最近遇到的同一个问题。
可能有点晚了，但我会 post 我是如何解决这个问题的，因为它可以帮助其他人。
问题基本上是通过调用 Validation.buildDefaultValidatorFactory().getValidator() 获得的 Hibernate 标准 Validator 实现对 Spring 的应用程序上下文一无所知，因此它无法在您的自定义中注入依赖项约束验证器。
在 Spring 应用程序中，Validator 和 ValidatorFactory 接口的实现是 class LocalValidatorFactoryBean，它可以委托给 ApplicationContext 以注入依赖项来实例化约束验证器。
你需要做的是
- 用它们的（模拟的，我想）依赖关系实例化你的约束验证器
- 创建您自己的
ValidatorFactory，其中包含要点 1 中的所有约束验证器
- 从这样的工厂实例化你的
Validator
这是自定义验证器工厂
public class CustomLocalValidatorFactoryBean extends LocalValidatorFactoryBean {
private final List<ConstraintValidator<?, ?>> customConstraintValidators;
public CustomLocalValidatorFactoryBean(List<ConstraintValidator<?, ?>> customConstraintValidators) {
this.customConstraintValidators = customConstraintValidators;
setProviderClass(HibernateValidator.class);
afterPropertiesSet();
}
@Override
protected void postProcessConfiguration(Configuration<?> configuration) {
super.postProcessConfiguration(configuration);
ConstraintValidatorFactory defaultConstraintValidatorFactory =
configuration.getDefaultConstraintValidatorFactory();
configuration.constraintValidatorFactory(
new ConstraintValidatorFactory() {
@Override
public <T extends ConstraintValidator<?, ?>> T getInstance(Class<T> key) {
for (ConstraintValidator<?, ?> constraintValidator : customConstraintValidators) {
if (key.equals(constraintValidator.getClass())) //noinspection unchecked
return (T) constraintValidator;
}
return defaultConstraintValidatorFactory.getInstance(key);
}
@Override
public void releaseInstance(ConstraintValidator<?, ?> instance) {
defaultConstraintValidatorFactory
.releaseInstance(instance);
}
}
);
}
}
那么在你的测试中 class 你只需做这样的事情：
class MyTestSuite {
private final UserRepository mockUserRepository = Mockito.mock(UserRepository.class);
private final List<ConstraintValidator<?,?>> customConstraintValidators =
Collections.singletonList(new EmailUniqueConstraintValidator(mockUserRepository));
private final ValidatorFactory customValidatorFactory =
new CustomLocalValidatorFactoryBean(customConstraintValidators);
private final Validator validator = customValidatorFactory.getValidator();
@Test
void myTestCase() {
// mock the dependency: Mockito.when(mockUserRepository...)
User u = new User();
//setters omitted
Set<ConstraintViolation<?>> violations = validator.validate(u);
//assertions on the set of constraint violations
}
}
希望对您有所帮助。您可以查看我的 post 以获取更多详细信息：https://codemadeclear.com/index.php/2021/01/26/how-to-mock-dependencies-when-unit-testing-custom-validators/