Question

我有一个是final的类，它有一个我想要执行某个动作的方法。因此，我想创建最终类的对象。但我无法创建它，以下是我的班级。

public final class A {

     private String name;

     A(String name){
       this.name = name;
     }

     public String getName(){
       return name;
     }
}

在我的junit测试用例中，我想创建该类的对象，如下面的

 Class TestA{

      @Test
      public void testA(){
          A a = mock(A.class);

          when(a.getName()).then("ABC"); //on this line i am getting exception
      }
 }

我也尝试过使用new关键字，但不能正常工作。那么无论如何都要创建一个最终类的模拟对象？

我面临的例外情况

org.mockito.exceptions.base.MockitoException: 
Cannot mock/spy class A
Mockito cannot mock/spy following:
  - final classes
  - anonymous classes
  - primitive types
    at com.rocket.map.resources.TestA.testA(TestA.java:46)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at 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(ParentRunner.java:363)
    at 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)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Answer 1

尝试使用它。

Use the @RunWith(PowerMockRunner.class) annotation at the class-level of the test case.
Use the @PrepareForTest(ClassWithFinal.class) annotation at the class-level of the test case.
Use PowerMock.createMock(ClassWithFinal.class) to create a mock object for all methods of this class (let's call it mockObject).
Use PowerMock.replay(mockObject) to change the mock object to replay mode.
Use PowerMock.verify(mockObject) to change the mock object to verify mode.

另请参阅此答案 - link

Tutorial。

两者看起来都很容易实现。

Answer 2

Mockito v1无法做到这一点请查看此link。我认为提前版本或powermockito你可以做到这一点.Powermockito example

使用mockito库在java中模拟最终类

2 个答案: