java - 模拟 ProceedingJoinPoint 签名

Question

我正在尝试模拟一个 ProceedingJoinPoint 类，但我在模拟一个方法时遇到困难。

这是调用模拟类的代码:

...
// ProceedingJoinPoint joinPoint

Object targetObject = joinPoint.getTarget();
try {

  MethodSignature signature = (MethodSignature) joinPoint.getSignature();
  Method method = signature.getMethod();

  ...
  ...

这是我到目前为止的模拟类尝试...

accountService = new AccountService();
ProceedingJoinPoint joinPoint = mock(ProceedingJoinPoint.class);
when(joinPoint.getTarget()).thenReturn(accountService);

我现在不确定如何模拟签名以获取什么方法？

when(joinPoint.getSignature()).thenReturn(SomeSignature); //???

有什么想法吗？

Answer 1

好吧，您可以模拟 MethodSignature 类，但我想您想要进一步模拟它以返回一个 Method 类实例。好吧，因为 Method 是最终的，它不能被扩展，因此不能被模拟。您应该能够在您的测试类中创建一个伪造的方法来表示您的“模拟”方法。我通常这样做:

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.reflect.MethodSignature;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.junit.MockitoJUnitRunner;

import java.lang.reflect.Method;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

@RunWith(MockitoJUnitRunner.class)
public class MyTest {
    AccountService accountService;

    @Test
    public void testMyMethod() {
        accountService = new AccountService();

        ProceedingJoinPoint joinPoint = mock(ProceedingJoinPoint.class);
        MethodSignature signature = mock(MethodSignature.class);

        when(joinPoint.getTarget()).thenReturn(accountService);
        when(joinPoint.getSignature()).thenReturn(signature);
        when(signature.getMethod()).thenReturn(myMethod());
        //work with 'someMethod'...
    }

    public Method myMethod() {
        return getClass().getDeclaredMethod("someMethod");
    }

    public void someMethod() {
        //customize me to have these:
        //1. The parameters you want for your test
        //2. The return type you want for your test
        //3. The annotations you want for your test
    }
}