postman Interface Test series: timestamps and encryption
When using the postman interface testing, for some interfaces timestamp fields need encryption, this time we encountered two problems, one is how to get the timestamp interface? The second is for the now commonly used md5 encryption code postman how to achieve it?
Here we have a concrete example of the interface will be described.
First, let us look at the interface document information, as shown 
in this interface document, it requires three parameters customercode, timestamp and IToken (customerCode + timestamp + ytoken is the result of encryption).
For the first time when in operation, we will use the postman doing so, as 
this operation process is:
- Select the submission is post, the input interface url address
- The interface mode is selected in the case of x-www-form-urlencoded
- Set interface parameters customerCode, timestamp value and itoken and
- After setup is complete click send to send, view the interface response results
Explanation
x-www-form-urlencoded that is application / x-www-from-urlencoded, in the form of the digital conversion value of a bond
postman in form-data, x-www-form-urlencoded, raw, binary distinction:
Timestamp conversion tools:
md5 encryption tool:
这样创建会话的接口我们就完成了！但是为了系统的安全性，这里的timestamp是每30分钟就会过期的，下次我们又需要重新设置timestamp，就是md5加密的结果......这样操作岂不是太麻烦?
还好postman中Pre-Request Script可以在 Request 之前自定义请求数据，这样做的好处就是可以以嵌入脚本的方式动态准备测试数据，并根据业务需求设计测试用例。
这里我们仍继续以上面的用例为例：
在postman中，如何才能获取当前机器上的timestamp呢？
Math.round(new Date().getTime()) 可以满足我们的要求!!!
那代码如何实现呢？
//设置当前时间戳毫秒
postman.setGlobalVariable("timestamp",Math.round(new Date().getTime()));这样就将获取的时间戳设置为全局变量timestamp
我们知道itoken的值是md5(customerCode+timestamp+ytoken')
那么接下来就可以动态的获取md5的信息了，代码如下:
//发起请求之前获取当前的时间戳放在参数里
//postman.setGlobalVariable("customerCode","***2345677***");
//1.设置环境变量 postman.setEnvironmentVariable("key", "value"); //2.设置全局变量 postman.setGlobalVariable("key", "value"); //environment.customerCode = "***2345677***"; customerCode = postman.getGlobalVariable("customerCode"); //设置当前时间戳毫秒 postman.setGlobalVariable("timestamp",Math.round(new Date().getTime())); //environment.timestamp = Math.round(new Date().getTime()); //postman.setEnvironmentVariable("unixtime_now","timecode"); //var jsonData = JSON.parse(request.data.applyJsonStr); //postman.setGlobalVariable("ytoken","*********b176a4739bfccb*********"); //获取全局变量 //如postman.getGlobalVariable("key"); customerCode = postman.getGlobalVariable("customerCode"); timestamp = postman.getGlobalVariable('timestamp'); ytoken = postman.getGlobalVariable("ytoken"); var str = customerCode+timestamp+ytoken; //postman.setEnvironmentVariable("str",str); //environment.str = str; postman.setGlobalVariable("str",str); //var md5 = CryptoJS.MD5(str).toString().toLowerCase(); //使用md5加密 //var strmd5 = CryptoJS.MD5(str).toString(); var strmd5 = CryptoJS.MD5(str); //environment.strmd5 = strmd5; postman.setGlobalVariable('md5',strmd5); //environment.md5 = md5; //timecode=System.currentTimeMillis(); console.log(str);而在接口请求中，就可以使用已经定义好的变量来进行接口操作，代码如下
customerCode:{{customerCode}}
timestamp:{{timestamp}}
ltoken:{{md5}}如图所示
这样下次创建接口的时候，直接运行该用例即可，不用再次修改参数值~(≧▽≦)/~
那么我们如何才能知道该接口用例是成功的呢，该怎么断言呢？
这里列出我该接口断言的一个示例，代码如下
/*
// 推荐用全等 ===，确保类型和值都一致
tests['Status code is 200'] = responseCode.code === 200;
// 判断是否存在 'success' 值
tests["Body matches code"] = responseBody.has("0");
var jsonData = JSON.parse(responseBody);
postman.setEnvironmentVariable("sessionId",jsonData.result); tests[`[INFO] Request params: ${JSON.stringify(request.data)}`] = true; tests["have result "]=jsonData.hasOwnProperty("error")!==true; tests[`[INFO] Response timeout: ${responseTime}`] = responseTime < 6000; **/ //状态代码是200 if(responseCode.code === 200){ // 判断是否存在 'success' 值，检查响应体包含一个字符串 tests["Body matches code"] = responseBody.has("0"); //响应结果中result保存为全局变量sessonId var jsonData = JSON.parse(responseBody); postman.setGlobalVariable("sessionId",jsonData.result); //输入接口参数信息 tests[`[INFO] Request params: ${JSON.stringify(request.data)}`] = true; // tests["have result "]=jsonData.hasOwnProperty("error")!==true; //判断接口响应结果有result tests["have result "]=jsonData.hasOwnProperty("result")===true; //判断接口响应时间小于N秒 tests[`[INFO] Response timeout: ${responseTime}`] = responseTime < 6000; }else{ //接口请求失败 tests["Waring：Request Failed. Please Fix!"] = false; }在使用postman进行接口测试的时候，对于有些接口字段需要时间戳加密，这个时候我们就遇到2个问题，其一是接口中的时间戳如何得到？其二就是对于现在常用的md5加密操作如何在postman中使用代码实现呢？
下面我们以一个具体的接口例子来进行说明。
首先来看看我们的接口文档信息，如图所示
此接口文档中，需要三个参数customercode、timestamp和itoken（是customerCode+timestamp+ytoken加密后的结果）。
第一次操作的时候，我们使用postman会这样操作，如图
这样操作流程是：
- 选择提交方式是post，输入接口的url地址
- 选择接口情况的方式是x-www-form-urlencoded
- 设置接口的参数customerCode、timestamp和itoken和值
- 设置完成之后点击send发送，查看接口响应结果
说明
x-www-form-urlencoded即是application/x-www-from-urlencoded，将表单内的数字转换为键对值
postman中 form-data、x-www-form-urlencoded、raw、binary的区别：
时间戳转换工具：
md5加密工具：
这样创建会话的接口我们就完成了！但是为了系统的安全性，这里的timestamp是每30分钟就会过期的，下次我们又需要重新设置timestamp，就是md5加密的结果......这样操作岂不是太麻烦?
Fortunately postman in Pre-Request Script can be customized request data before the Request, the benefits of doing so in a manner that can be embedded script dynamic test data preparation, according to business needs and design test cases.
Here we continue to use the same example above:
In the postman, and how to get the current timestamp on the machine it?
Math.round(new Date().getTime()) To meet our requirements !!!
how that code to achieve it?
//设置当前时间戳毫秒
postman.setGlobalVariable("timestamp",Math.round(new Date().getTime()));This will get the stamp to the global variable timestamp
we know the value of itoken is md5(customerCode+timestamp+ytoken')
so then you can get information md5 dynamic of the code is as follows:
//发起请求之前获取当前的时间戳放在参数里
//postman.setGlobalVariable("customerCode","***2345677***");
//1.设置环境变量 postman.setEnvironmentVariable("key", "value"); //2.设置全局变量 postman.setGlobalVariable("key", "value"); //environment.customerCode = "***2345677***"; customerCode = postman.getGlobalVariable("customerCode"); //设置当前时间戳毫秒 postman.setGlobalVariable("timestamp",Math.round(new Date().getTime())); //environment.timestamp = Math.round(new Date().getTime()); //postman.setEnvironmentVariable("unixtime_now","timecode"); //var jsonData = JSON.parse(request.data.applyJsonStr); //postman.setGlobalVariable("ytoken","*********b176a4739bfccb*********"); //获取全局变量 //如postman.getGlobalVariable("key"); customerCode = postman.getGlobalVariable("customerCode"); timestamp = postman.getGlobalVariable('timestamp'); ytoken = postman.getGlobalVariable("ytoken"); var str = customerCode+timestamp+ytoken; //postman.setEnvironmentVariable("str",str); //environment.str = str; postman.setGlobalVariable("str",str); //var md5 = CryptoJS.MD5(str).toString().toLowerCase(); //使用md5加密 //var strmd5 = CryptoJS.MD5(str).toString(); var strmd5 = CryptoJS.MD5(str); //environment.strmd5 = strmd5; postman.setGlobalVariable('md5',strmd5); //environment.md5 = md5; //timecode=System.currentTimeMillis(); console.log(str);In the interface requests, already defined can be used to interface a variable operation, as follows
customerCode:{{customerCode}}
timestamp:{{timestamp}}
ltoken:{{md5}}As shown
so the next time creating an interface, the use cases can be run directly, without having to modify the parameter value ~ (≧ ▽ ≦) / ~ again,
then we know how to use this interface is a successful example of it, how to assert it?
Here are my assertion that interface an example, the following code
/*
// 推荐用全等 ===，确保类型和值都一致
tests['Status code is 200'] = responseCode.code === 200;
// 判断是否存在 'success' 值
tests["Body matches code"] = responseBody.has("0");
var jsonData = JSON.parse(responseBody);
postman.setEnvironmentVariable("sessionId",jsonData.result); tests[`[INFO] Request params: ${JSON.stringify(request.data)}`] = true; tests["have result "]=jsonData.hasOwnProperty("error")!==true; tests[`[INFO] Response timeout: ${responseTime}`] = responseTime < 6000; **/ //状态代码是200 if(responseCode.code === 200){ // 判断是否存在 'success' 值，检查响应体包含一个字符串 tests["Body matches code"] = responseBody.has("0"); //响应结果中result保存为全局变量sessonId var jsonData = JSON.parse(responseBody); postman.setGlobalVariable("sessionId",jsonData.result); //输入接口参数信息 tests[`[INFO] Request params: ${JSON.stringify(request.data)}`] = true; // tests["have result "]=jsonData.hasOwnProperty("error")!==true; //判断接口响应结果有result tests["have result "]=jsonData.hasOwnProperty("result")===true; //判断接口响应时间小于N秒 tests[`[INFO] Response timeout: ${responseTime}`] = responseTime < 6000; }else{ //接口请求失败 tests["Waring：Request Failed. Please Fix!"] = false; }