使用mockito库模拟java中的final类

Question

我有一个最终类，它有一个我想执行特定操作的方法。因此我想创建最终类的对象。但我无法创建它，以下是我的课程。

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，如下所示

 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，但不起作用。那么有没有办法创建最终类的模拟对象呢？

在我面临异常之后，

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

尝试使用这个。

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 -链接

和教程。

两者看起来都很容易实现。