How do you Test Getter and Setter Interface in Java using Mockit

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
  • 阅读：87 次

Usually, we unit tests the logics. An interface is without implementation details. A interface is just a binding a contract, but still, we can use Mockito to mock the interface, and test it.

For example, given the following simple Setter and Getter Interface:

1
2
3
4

interface GetAndSet {
    void setValue(String name);
    String getValue();
}
interface GetAndSet {
    void setValue(String name);
    String getValue();
}

We can test it like this – thanks to the Mockito mocking framework in Java. We use doAnswer method to intercept the invokation of a interface method i.e. setter, then at the time, we mock the getter.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

package com.helloacm;
 
import lombok.val;
import org.junit.jupiter.api.Test;
 
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Mockito.*;
 
interface GetAndSet {
    void setValue(String name);
    String getValue();
}
 
public class ExampleTest {
    @Test
    public void test_simple_getter_setter_interface() {
        val instance = mock(GetAndSet.class);
 
        doAnswer(invocation -> {
            // or use invocation.getArgument(0);
            val name = (String)invocation.getArguments()[0];
            when(instance.getValue()).thenReturn(name);
            return null;
        }).when(instance).setValue(anyString());
 
        instance.setValue("HelloACM.com");
        assertEquals("HelloACM.com", instance.getValue());
    }
}
package com.helloacm;

import lombok.val;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Mockito.*;

interface GetAndSet {
    void setValue(String name);
    String getValue();
}

public class ExampleTest {
    @Test
    public void test_simple_getter_setter_interface() {
        val instance = mock(GetAndSet.class);

        doAnswer(invocation -> {
            // or use invocation.getArgument(0);
            val name = (String)invocation.getArguments()[0];
            when(instance.getValue()).thenReturn(name);
            return null;
        }).when(instance).setValue(anyString());

        instance.setValue("HelloACM.com");
        assertEquals("HelloACM.com", instance.getValue());
    }
}

If the method we are mocking is not void – we can use when. For example:

1
2
3

when(instance.getValue()).thenAnswer(innocation -> {
     return "Hello";
});
when(instance.getValue()).thenAnswer(innocation -> {
     return "Hello";
});

–EOF (The Ultimate Computing & Technology Blog) —

推荐阅读：
食用油的选择：解密食用油养生之道　 对牙齿的健康非常有益的几种食物　 常吃这些食物可让你拥有健康的牙齿　 转基因食品安全立法的不足和完善建议　 食品添加剂过量对人体健康带来的危害　 揭秘零食里面的食品添加剂及其危害　 食品学专家解析转基因食品安全问题　 最有利于秋季养生的果蔬食物大盘点　 对眼睛视力保护最有好处的10种食物　 多吃4类富含维生素的食物给眼睛补营养　
评论列表
添加评论