有人可以解释我如何为以下代码编写 junit 测试代码吗？

Question

package com.leopard.spring;

import java.time.LocalTime;

import org.springframework.stereotype.Service;

@Service

public class MessageBean {

public String getMessage() {

    return "Button was clicked at " + LocalTime.now();

     }

}

Answer 1

这个类没有太多要测试的。您唯一可以测试的是它返回一个字符串，并且它与消息格式匹配。显然你无法测试你将获得的确切时间，但你可以期望它以消息开头：@Testpublic void testGetMessage() {  String expectedMessagePrefix = "Button was clicked at ";  String message = testedClass.getMessage();  assertTrue("did not get the expected message", message.startsWith(expectedMessagePrefix));}