java - 执行 JUnit 测试用例时出现堆栈溢出错误

Question

我正在为其编写单元测试的方法有一个方法调用，该方法调用引用另一个抽象类中的方法。该方法被递归调用，这在我执行测试用例时给出了堆栈溢出错误。

下面是正在测试的方法

public void configure(Hashtable config) throws PipeBrokenException
  {
    // Configure the Pipe Element ...
    _source = (String) config.get(this.IMAGE_SOURCE);
    _destination = (String) config.get(this.IMAGE_DESTINATION);
    _printer = (XrayPrinterIf) config.get(this.PRINTER_INTERFACE);
    _configProvider = (AutoPrintConfigProvider) config.get(this.AUTOPRINT_CONFIG_PROVIDER);
     TraceLogger.getApplicationLogger().info("AutoPrintEndPoint Configure.. useTaskManager = " +useTaskManager);
    if(useTaskManager)
    {
        mgr = new AutoPrintTaskManager(this);
    }
    super.configure(config);//this method call gives a stack overflow error, when I comment this my test case runs fine.
  }

下面是方法调用的定义super.configure(config);，包含该方法的类是一个抽象类，并且该方法被无限递归地调用，导致出现堆栈溢出错误。

此方法在公共(public)抽象类AnAbstractClass中定义

public abstract class AnAbstractClass{
public void configure(Hashtable properties) throws PipeBrokenException
  {
    if( _nextNode != null)
    {
      _nextNode.configure(properties);
    }
  }
}

这是我的 JUnit 测试用例，我对此和学习仍然是业余爱好者，请随时纠正我的错误，并希望解决我面临的错误。

@InjectMocks
    AutoPrintEndPoint autoPrintEndPoint = PowerMockito.spy(new AutoPrintEndPoint("pipeName")); //AutoPrintEndPoint is the class under test
@Test
    public void testConfigureHashtable() throws PipeBrokenException 
    {
      //  SmartPipeNode node=Mockito.mock(SmartPipeNode.class,Mockito.CALLS_REAL_METHODS);

        AutoPrintConfigProvider autoPrintConfigProvider=Mockito.mock(AutoPrintConfigProvider.class); //AutoPrintConfigProvider is an interface
        XrayPrinterIf _printerIf=Mockito.mock(XrayPrinterIf.class);//XrayPrinterIf  is an interface
        Hashtable config=new Hashtable();
        config.put(AutoPrintEndPoint.IMAGE_SOURCE,"Source");
        config.put(AutoPrintEndPoint.IMAGE_DESTINATION,"Destination");
        config.put(AutoPrintEndPoint.PRINTER_INTERFACE,_printerIf);
        config.put(AutoPrintEndPoint.AUTOPRINT_CONFIG_PROVIDER,autoPrintConfigProvider);
        autoPrintEndPoint.configure("useTaskManager","yes");

        //Mockito.doNothing().when(autoPrintEndPoint).configure(config);


        autoPrintEndPoint.configure(config);
        String _source=Whitebox.getInternalState(autoPrintEndPoint, "_source");
        String _destination=Whitebox.getInternalState(autoPrintEndPoint, "_destination");
        System.out.println(_destination+"hello destination");
        System.out.println(_source+"here");
    }

堆栈跟踪

java.lang.StackOverflowError
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$100(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:178)
    at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:68)
    at java.lang.ClassLoader.loadClass(Unknown Source)

Answer 1

由于您使用的是 PowerMockito，您应该能够通过以下方式抑制对 AnAbstractClass 中方法的任何调用:

PowerMockito.suppress(MemberMatcher.methodsDeclaredIn(AnAbstractClass.class));