Parameterization of postman

Preface

friends , Long time no see , Today, I want to talk with you postman A parameterized , In the interface test , Some parameters are unique values for each send request , At this time, the test data can be parameterized ,postman There are three main forms of parameterization .

1、 Built in variable implementation

The built-in variable is postman Built in system variables , But we can't make an accurate comparison

Variable Name	Description	Examples
{ {$guid}}	Add one V4 Style GUID	“611c2e81-2ccb-42d8-9ddc-2d0bfa65c1b4”
{ {$timestamp}}	Add the current timestamp , Accurate to seconds	1562757107 , 1562757108 , 1562757109
{ {$randomint}}	add to 0-1000 Random integer between	0-1000 Random integer between
{ {$randomFullName}}	Random full name （ name surname ）	Connie Runolfsdottir , Sylvan Fay , Jonathon Kunze
{ { $randomBoolean}}	Random Boolean values (true/false)	true , false , false , true

More built-in variable references ：https://blog.csdn.net/minzhung/article/details/102531880 Built in variables are generally placed in request in

2、Pre-request-Script The tab uses code to realize

The execution sequence of a single request is shown in the following figure ：

​Pre-request-Script→request→response→Tests

This is a more recommended parameterization method , You can write your own script , Improved plasticity ,

It is worth noting that when the interface test is executed, the interface will execute the code here first , Then send the request , Finally, make an assertion , And test All support js grammar

Pre-request-Script What to do before executing the interface request , and tests Is to perform the requested operation , Built in variables are generally placed in request in , We

You can also use code in pre-request-Script To realize , The advantage of code implementation is that it can be reused , Here are some examples ：

Example 1 、Pre-request-Script First define the current time and get , Set the current time as a global variable and then transfer it to the request parameters , And then in Tests Assert in

3、 The following is the implementation of other parameterization methods

The code is as follows

var now_time = Date.now();
pm.globals.set("now_time", now_time);

const guid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
.replace(/x/g, () => (Math.floor(Math.random() * 16)).toString(16))
.replace(/y/g, () => (Math.floor(Math.random() * 4 + 8)).toString(16));

pm.globals.set("guid_value", guid);

const randomInt = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;

pm.globals.set("random_number", randomInt(8,14) );

const getRandomValue = list => list[randomInt(0, list.length - 1)];
const charsInName = [' king ',' Li ',' Zhang '];
pm.globals.set("people_name", getRandomValue(charsInName) );

var mobile_num = `13${randomInt(500000000, 599999999)}`;
pm.globals.set('mobile_num',mobile_num);

const sleep = (milliseconds) => {
const start = Date.now();
while (Date.now() <= start + milliseconds) {}
};
sleep(5000);

4、 External files

4.1 adopt csv Documents or json Format file to achieve parameterization

csv The use of , First, set the fields to be searched and the search results in the file

​ The key self should be separated by English commas , The first line writes the defined parameter variables , Remember to use utf-8 The encoding format of 、.csv The file suffix is saved , Click on runner Button

​ You can also view the specific running results on the console

If the expected result of the assertion is also written into the file , It can also be in Tests Called in assertion , No more examples here

​4.2 External files can also be accessed through json Format file to achieve parameterization , Remember to check whether the file is json

​ It is worth noting that iteration Set the number of iterations , Each iteration will use a line in your data file , If the number of iterations exceeds the number of lines in the data file , I will reuse the last row of data

summary

So much for today's article , Remember to like collection comments and pay attention to your favorite friends , Pay attention to the different surprises I give you every day .

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