class A 依赖 class B 和 class C

class D 依赖 class C 和 class E

class B 依赖 …

class E 依赖 …

1.被测对象依赖的对象构造复杂

我们想对class A进行单元测试，需要构造大量的class B、C、D等依赖对象他们的构造步骤多、耗时较长) ，这时我们可以利用mock去构造虚拟的class B、C、D 对象用于class A的测试，因为我们只是想测试class A的行为是否符合预期，我们并不需要测试依赖对象，如下图所示：

2.被测单元依赖的模块尚未开发完成，而被测对象需要依赖模块的返回值进行测试：

— 比如service层的代码中，包含对dao层的调用，但dao层代码尚未实现

— 比如web的前端依赖后端接口获取数据进行联调测试，但后端接口并未开发完成（主要针对前后端联调）

[
  {
    "description": "mockDemo",
    "request": {
      "uri": "/demo"
    },
    "response": {
      "headers":{
        "Content-Type":"application/json;charset=UTF-8"
      },
      "text": "mocoresponse"
    }
  }
]

java -jar moco-runner-1.2.0-standalone.jar http -p 8888 -c mocoDemo.json

[
    {
        "request": {
            "uri": "/saas-design/api/design/plan/test/detail",
            "method": "get",
            "headers": {
                "content-type": "application/json;charset=UTF-8"
            }
        },
        "response": {
            "json": {
                "c": "enim dolore ut elit Ut",
                "m": "consequat elit ve",
                "d": {
                    "designId": "test",
                    "planId": "test",
                    "designName": "test",
                    "planType": "tempor irure Excepteur non",
                    "planCity": "ut occaecat commodo et ex",
                    "communityName": "amet ",
                    "coverPicId": "in",
                    "userId": "consequat id aute",
                    "area": -98167778.83367354,
                    "srcArea": 78365468.30601966,
                    "desc": "consequat in",
                    "formatModifiedTime": null,
                    "privateStatus": true,
                    "floorPlanAddress": "dolor eu",
                    "isHouse": false,
                    "isPlanOwner": false,
                    "isReplicable": false,
                    "tags": [
                        "proid"
                    ],
                    "brandPackage": {
                        "packageName": "laboris Excepteur"
                    },
                    "coverPic": "anim laboris est",
                    "modifiedTime": -46789762.621906884,
                    "privateAttributeStatus": -10654500.438538507
                }
            }
        }
    },{
        "request": {
            "uri": "/saas-design/api/design/plan/test1/detail",
            "method": "get",

            "headers": {
                "content-type": "application/json;charset=UTF-8"
            }
        },
        "response": {
            "json": {
                "c": "-1",
                "m": "amet",
                "d": "design not exist!"
            }
        }
    },{
             "request": {
                 "uri": "/saas-design/api/design/plan/test2/detail",
                 "method": "get",
                 "headers": {
                     "content-type": "application/json;charset=UTF-8"
                 }
             },
             "response": {
                 "status": 500,
                 "text":"<html>servier error</html>"
             }
         }
]