Mockito.md

1. 常用的 Mockito 方法

方法名	描述
Mockito.mock(classToMock)	模拟对象
Mockito.verify(mock)	验证行为是否发生
Mockito.when(methodCall).thenReturn(value1).thenReturn(value2)	触发时第一次返回 value1，第 n 次都返回 value2
Mockito.doThrow(toBeThrown).when(mock).[method]	模拟抛出异常。
Mockito.mock(classToMock,defaultAnswer) 使用默认 Answer	模拟对象
Mockito.when(methodCall).thenReturn(value)	参数匹配
Mockito.doReturn(toBeReturned).when(mock).[method]	参数匹配（直接执行不判断）
Mockito.when(methodCall).thenAnswer(answer))	预期回调接口生成期望值
Mockito.doAnswer(answer).when(methodCall).[method]	预期回调接口生成期望值（直接执行不判断）
Mockito.spy(Object)	用 spy 监控真实对象,设置真实对象行为
Mockito.doNothing().when(mock).[method]	不做任何返回
Mockito.doCallRealMethod().when(mock).[method] //等价于 Mockito.when(mock.[method]).thenCallRealMethod();	调用真实的方法
reset(mock)	重置 mock

作者：PC_Repair 链接：https://www.jianshu.com/p/ecbd7b5a2021 来源：简书 著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

2. 使用 Mockito 修改私有属性

https://blog.csdn.net/tcctcszhanghao/article/details/107079445

public class Whitebox {
    /**
     *
     * @param target    目标对象
     * @param fieldName 属性
     * @param value     mock 值
     */
    public static void setInternalState(Object target, String fieldName, Object value) {
        try {
            Field field = target.getClass().getDeclaredField(fieldName);
            field.setAccessible(true); // 粗爆的改成可访问，不管现有修饰
            field.set(target, value);
        } catch (Exception e) {
            Assert.fail("Cannot change value of " + fieldName + " against target " + target);
        }
    }
}

3. Mockito 3.6.0 中文文档

https://changingfond.github.io/mockito-zh-doc.html

4. MockHttpServletRequest+MockHttpServletResponse+MockFilterChain

引入

<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <scope>test</scope>
</dependency>

MockHttpServletRequest servletRequest = new MockHttpServletRequest();
ServletResponse servletResponse = new MockHttpServletResponse();
FilterChain filterChain = new MockFilterChain();

5. Mockito 示例

// mock 属性
Whitebox.setInternalState(XXX, "YYY", ZZZ);
// mock 对象
HttpServletRequest request = Mockito.mock(HttpServletRequest.class);
// 描述行为
Mockito.when(request.getParameter(ArgumentMatchers.anyString())).thenReturn("test");
// 注入
Injector.inject(被注入实例, (Class<?>) 被注入实例.class, "属性", (Object) 注入对象);
// HandlerMethod
HandlerMethod handler = Mockito.mock(HandlerMethod.class);
Mockito.when(handler.getMethod()).thenReturn(NoLoginExample.class.getDeclaredMethod("some_method", null));
Mockito.when(handler.getMethod()).thenReturn(MethodExample.class.getDeclaredMethod("some_method", null));

// StringRedisTemplate
StringRedisTemplate redisTemplate = Mockito.mock(StringRedisTemplate.class, Mockito.RETURNS_DEEP_STUBS);

使用注解的类：

public class MethodExample {
    @Login
    public void some_method() {

    }
}

public class NoLoginExample {

    public void some_method() {

    }

}