cannot have an existing value

写单元测试遇到下面的问题
BaseTest 中的producer 已经存在值了再次被赋值导致系统异常
org.springframework.beans.factory.BeanCreationException:
Could not inject field: protected mq.producer.Producer BaseTest.producer; nested exception is java.lang.IllegalStateException: The field protected mq.producer.Producer BaseTest.producer cannot have an existing value

mock赋值
org.springframework.boot.test.mock.mockito.MockitoPostProcessor#inject(java.lang.reflect.Field, java.lang.Object, java.lang.String)

 private void inject(Field field, Object target, String beanName) {try {field.setAccessible(true);Assert.state(ReflectionUtils.getField(field, target) == null,() -> "The field " + field + " cannot have an existing value");Object bean = this.beanFactory.getBean(beanName, field.getType());ReflectionUtils.setField(field, target, bean);}catch (Throwable ex) {throw new BeanCreationException("Could not inject field: " + field, ex);}}

出现问题的原因是我的单元测试使用了

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = Application.class)

@RunWith(JMockit.class)

两种方式
在idea中执行文件夹的时候
在JUNIT执行中发现当下面runners 中只有一个类的时候是没有任何问题的，多个runner复用的时候可能会引发一系列的问题。后续类似奇怪的问题可以参考此方案查询
org.junit.runner.JUnitCore#run(org.junit.runner.Runner)

runner = {IdeaSuite48@2281} myName = "test"runners = {Collections$UnmodifiableRandomAccessList@2286}  size = 80 = {JMockit@2292} 1 = {SpringJUnit4ClassRunner@2293} 2 = {SpringJUnit4ClassRunner@2294} 3 = {SpringJUnit4ClassRunner@2295} 4 = {SpringJUnit4ClassRunner@2296} 5 = {SpringJUnit4ClassRunner@2297} 6 = {SpringJUnit4ClassRunner@2298} 7 = {SpringJUnit4ClassRunner@2299} childrenLock = {Object@2287} testClass = {TestClass@2288} filteredChildren = {Collections$UnmodifiableCollection@2289}  size = 8scheduler = {ParentRunner$1@2290}

依赖包

     <dependency><groupId>org.jmockit</groupId><artifactId>jmockit</artifactId><version>1.8</version><scope>test</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><version>2.1.2.RELEASE</version><scope>test</scope></dependency>

使用下面的注解就也么有问题

@RunWith(MockitoJUnitRunner.Silent.class)

     <dependency><groupId>org.mockito</groupId><artifactId>mockito-core</artifactId><version>2.21.0</version><scope>test</scope></dependency>

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