并行运行junit测试时的竞争条件

我想知道如果我并行运行测试并且两个测试(下面)共享一个实例变量，是否会出现某些竞争状况?因此，我的测试类使用SpringJunit4ClassRunner运行，并且我有2个测试方法a()和b()，变量state将在每个测试中进行修改或重新分配，并且doSomethingWithState()将使用变量state并通过它的测试方法.我知道 maven-surefire-plugin 可以在将方法a()和b()都分配给一个线程并并行运行的方法级别上运行它.

I am wondering would it have some race condition if I run my tests in parallel and the two tests (below) share an instance variable? So my test class runs with SpringJunit4ClassRunner, and I have 2 tests method a() and b(), the variable state will be modified or reassigned from each test, and the doSomethingWithState() would use the variable state and pass it to the testing method. I know with maven-surefire-plugin you can run it at the method level that both a() and b() will get assigned to a thread and run it in parallel.

@RunWith(SpringJUnit4ClassRunner.class)
public class TestA {

     private Object state;

     @Test
     public void a() {
          stateObjectA();
          doSomethingWithState();
          assertion();
     } 

     @Test
     public void b() {
          stateObjectB();
          doSomethingWithState();
          assertion();
     }

     private void stateObjectA() {
          // do some mocking and setup state
     }

     private void stateObjectB() {
          // do some mocking and setup state
     }

     private void doSomethingWithState() {
          // use the state object and feed into the testing method
     }
}