图结构junit测试NullPointerException
我为映射类进行单元测试，但每次它都会显示我NullPointerException
@Mapper(componentModel = "spring")
public abstract class CountryMapper implements EntityMapper<CountryDTO, Country> {
static final public CountryMapper INSTANCE = Mappers.getMapper(CountryMapper.class);
@Autowired
CountryRepository countryRepository;
Country fromId(Long id) {
if (id == null) {
return null;
}
return countryRepository.findOne(id);
}
}
public class CountryMapperUnitTest {
CountryMapper countryMapper = CountryMapper.INSTANCE;
@Test
public void givenIdCountrytoCountry_whenMaps_thenCorrect() {
Long id = 1L;
Country country = countryMapper.fromId(id);
assertEquals(id, country.getId()); //NullPointerException
}
java.lang.NullPointerException at com.soft.prg.service.mapper.CountryMapperUnitTest.givenCountryDTOtoCountry_whenMaps_thenCorrect（CountryMapperUnitTest.java:26）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java ：62）在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall（FrameworkMethod .java：50），位于org.junit.runners.model.FrameworkMethod.invokeExplosively（FrameworkMethod.java:47）org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12）。 internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:17）at org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:325）at org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:78）在org.junit.runners.BlockJUnit4ClassRunner.runChild（Block JUnit4ClassRunner.java:57）在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:290）在org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:71）在org.junit.runners.ParentRunner .runChildren（ParentRunner.java:288）at org.junit.runners.ParentRunner.access $ 000（ParentRunner.java:58）at org.junit.runners.ParentRunner $ 2.evaluate（ParentRunner.java:268）at org.junit。 runners.ParentRunner.run在org.eclipse.jdt.internal.junit.runner.TestExecution（ParentRunner.java:363）在org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:86）。运行（TestExecution.java:38）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:459）at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner。的java：678）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:382）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:192）
当我在类上添加@RunWith (SpringRunner.class)时，它向我显示了这个错误
org.springframework.beans.factory.UnsatisfiedDependencyException：创建名为'com.soft.prg.service.mapper.CountryMapperUnitTest'的bean时出错：通过字段'countryMapper'表示的不满意的依赖项; 嵌套异常是org.springframework.beans.factory.NoSuchBeanDefinitionException：没有可用的bean类型'com.soft.prg.service.mapper.CountryMapper'可用：预计至少有1个bean有资格作为autowire候选者。 依赖注释：位于org.springframework的org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:588）处的{@ org.springframework.beans.factory.annotation.Autowired（required = true）}。在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory的org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:366）处的beans.factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:88）。使用org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies（DependencyInjectionTestExecutionListener.java:118）在org.springframework.test.context.suppor t.DependencyInjectionTestExecutionListener.prepareTestInstance（DependencyInjectionTestExecutionListener.java:83）at org.springframework.test.context.TestContextManager.prepareTestInstance（TestContextManager.java:230）at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest（SpringJUnit4ClassRunner.java： 228）在org.springframework的org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12）处的org.springframework.test.context.junit4.SpringJUnit4ClassRunner $ 1.runReflectiveCall（SpringJUnit4ClassRunner.java:287）。 test.context.junit4.SpringJUnit4ClassRunner.methodBlock（SpringJUnit4ClassRunner.java:289）at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:247）at org.springframework.test.context.junit4.SpringJUnit4ClassRunner。 rungild（SpringJUnit4ClassRunner.java:94）at org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:290）at org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:71）a 牛逼org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288）维持在org.junit.runners.ParentRunner $ 2.evaluate org.junit.runners.ParentRunner.access $ 000（ParentRunner.java:58）（ParentRunner.java ：268）at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate（RunBeforeTestClassCallbacks.java:61）at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate（RunAfterTestClassCallbacks.java:70）at org.junit.runners.ParentRunner.run（ParentRunner.java:363）在org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run（SpringJUnit4ClassRunner.java:191）在org.eclipse.jdt.internal.junit4.runner。 JUnit4TestReference.run（JUnit4TestReference.java:86）at org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:38）at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（ RemoteTestRunner.java:459）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:678）at org.eclip org.springframework：se.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:382）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:192）所致。 beans.factory.NoSuchBeanDefinitionException：不存在可用的'com.soft.prg.service.mapper.CountryMapper'类型的合格bean：期望至少1个符合自动装配候选者的bean。 依赖注释：位于org.springframework.beans的org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound（DefaultListableBeanFactory.java:1493）{@ org.springframework.beans.factory.annotation.Autowired（required = true）}。 factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:1104）at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:1066）at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement。注入（AutowiredAnnotationBeanPostProcessor.java:585）... 28更多
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