expected once, never invoked: userService.getUserInfo(<1000>); returns <User{id=100, name='admin'}>

在运行第一个 JMock 程序时，抛出了如下错误信息：

Exception in thread "main" unexpected invocation: userService.getUserInfo(<100>)

expectations:

  expected once, never invoked: userService.getUserInfo(<1000>); returns <User{id=1000, name='admin'}>

      parameter 0 did not match: <1000>, because was <100>

what happened before this: nothing!

    at org.jmock.api.ExpectationError.unexpected(ExpectationError.java:23)

    at org.jmock.internal.InvocationDispatcher.dispatch(InvocationDispatcher.java:85)

    at org.jmock.Mockery.dispatch(Mockery.java:231)

    at org.jmock.Mockery.access$100(Mockery.java:29)

    at org.jmock.Mockery$MockObject.invoke(Mockery.java:271)

    at org.jmock.internal.InvocationDiverter.invoke(InvocationDiverter.java:27)

    at org.jmock.internal.FakeObjectMethods.invoke(FakeObjectMethods.java:38)

    at org.jmock.internal.SingleThreadedPolicy$1.invoke(SingleThreadedPolicy.java:21)

    at org.jmock.lib.JavaReflectionImposteriser$1.invoke(JavaReflectionImposteriser.java:33)

    at com.sun.proxy.$Proxy0.getUserInfo(Unknown Source)

    at com.huangx.jmock.OrderService.findOrder(OrderService.java:19)

    at com.huangx.jmock.Client.main(Client.java:35)

部分代码如下：

package com.huangx.jmock;

import org.jmock.Expectations;
import org.jmock.Mockery;

public class Client {

    public static void main(String[] args) {
        final User user = new User(100, "admin");

        // 建立一个 test 上下文对象。
        Mockery context = new Mockery();

        // 生成一个mock对象
        final UserService userService = context.mock(UserService.class);

        // 设置期望
        context.checking(new Expectations() {
            {
                oneOf(userService).getUserInfo(1000);
                will(returnValue(user));
            }
        });

        OrderService orderService = new OrderService();
        // 设置mock对象
        orderService.setUserService(userService);

        // 调用方法
        orderService.findOrder("ID-1000");
    }

}

上面错误信息是因为我们返回的值 final User user = new User(100, "admin"); 和 oneOf(userService).getUserInfo(1000); 语句 getUserInfo 语句指定的参数 1000 不一致。

公共广告位-后端

要解决上面的问题，我们有两种方式：

（1）方式一：修改返回值

final User user = new User(100, "admin");

改为

final User user = new User(1000, "admin");

（2）方式二：修改调用参数

// 设置期望
context.checking(new Expectations() {
    {
        oneOf(userService).getUserInfo(1000);
        will(returnValue(user));
    }
});

改为

// 设置期望
context.checking(new Expectations() {
    {
        oneOf(userService).getUserInfo(100);
        will(returnValue(user));
    }
});