您如何对私有方法进行单元测试？

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private int add(int a, int b){
    return a + b;
}

@VisibleForTesting
int add(int a, int b){
    return a + b;
}

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MyObject obj = new MyObject();
Method privateMethod = MyObject.class.getDeclaredMethod("getFoo", null);
privateMethod.setAccessible(true);
String returnValue = (String) privateMethod.invoke(obj, null);
System.out.println("returnValue = " + returnValue);

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src/main/java/you/Class.java

src/test/java/you/TestClass.java

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<dependency>
     <groupId>org.easytesting</groupId>
     <artifactId>fest-assert</artifactId>
     <version>1.4</version>
    </dependency>

    <dependency>
     <groupId>org.easytesting</groupId>
     <artifactId>fest-reflect</artifactId>
    <version>1.2</version>
</dependency>

import static org.fest.reflect.core.Reflection.method;
...

MyClass objectToTest;

@Before
public void setUp(){
   objectToTest = new MyClass();
}

@Test
public void testPrivateMethod(){
   // GIVEN
   String myOriginalString = "toto";
   // WHEN
   method("myPrivateMethod").withParameterTypes(String.class).in(objectToTest).invoke(myOriginalString);
   // THEN
   Assert.assertEquals("this is cool testing !", myOriginalString);
}

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public class classUnderTest
{
   //this would normally be private
   protected void methodToTest()
   {
     //some code here
   }
}

class TestingClass : classUnderTest
{
   public void methodToTest()
   {
     //this returns the method i would like to test
     return base.methodToTest();
   }
}

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@Test
public static class UserEditorTest {
    public void test_private_method() {
       assertEquals(new UserEditor().somePrivateMethod(), "success");
    }
}

$ mvn test -Dtest=*UserEditorTest

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