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A cheat sheet by name looks like something which is not allowed or which can be misused. In software reference a cheat sheet is something which is used for quick reference or which is used for knowing something too specific without any details mainly codes, syntax or formulas. So this tutorial is designed for your quick reference for some Postman commands, codes and syntax. Please Note that all the syntax and code used here is as of latest style of writing codes/tests in Postman.

For more information you can visit https://learning.getpostman.com/docs/postman/scripts/test_examples/

Variables

Codes for working with environment and variables

Setting Variables

Codes for working around with variables

Global Variables

pm.globals.set('variable name', "value");

Local Variable

var variable_name = value;

Environment Variable

pm.environment.set('variable_name' , 'value');

Getting Variables

Global Variables

pm.globals.get('variable_name');

Environment Variable

pm.environment.get('varibable_name');

Data Variable

pm.iterationData.get('variable_name');

Local Variable

variable_name;

Clearing Variables

Global Variables (only one)

pm.globals.unset('variable_name');

Global Variables (All)

pm.globals.clear();

Environment Variable(only one)

pm.environment.unset('variable_name');

Environment Variable (All)

pm.environment.clear();

Assertions

Response

Different codes related to the response.

Response contains a string

pm.test("String found", function(){

pm.expect(pm.response.text()).to.include("string you want to search");

});

Response body is equal to a string

pm.test("Body is equal to string", function(){

pm.response.to.have.body("string you want to check");
 
});

Status Code

Code related to the status code in Postman

Single Status code

pm.response.to.have.status(status_code);

Multiple Status Code

pm.expect(pm.response.code).to.be.oneOf([status_code, status_code]);

Response Time

pm.expect(pm.response.responseTime.to.be.below(time));

Check for JSON Value

pm.test("Your_Test_Name", function(){

var jsonData = pm.response.json();

pm.expect(jsonData.value).to.eql(value);

});

Content-Type Present

pm.test("Your_Test_Name", function(){

pm.response.to.have.header("Content-Type");

});

Header Exists

pm.response.to.have.header('X-Cache');

Cookie Exists

pm.expect(pm.cookies.has('sessionID')).to.be.true;

Body

Code related to body field.

Exact Match

pm.response.to.have.body("OK");
pm.response.to.have.body('{"success"=true}');

Partial Match

pm.expect(pm.response.text()).to.include('ToolsQA');

Send an Asynchronous Request

pm.sendRequest("https://postman-echo.com/get", function(err, response){

console.log(response.json());

});

JSON Response

Parse Body

var jsonData = pm.response.json();

Check the array count in the response

pm.test("ISBN Count", function () {
pm.expect(2).to.eql(pm.response.json().arrayName.length);
});

Check for a particular value inside array

This example is checking a particular ISBN number among all the books received in response and returns true if found.

pm.test("Test Name", function () {
var result;
for (var loop = 0; loop < pm.response.json().arrayName.length; loop++)
{
if (pm.response.json().arrayName[loop].arrayElement=== pm.variables.get("arrayElementValue")){
result=true;
break;
}
}
pm.expect(true).to.eql(result);
});

The above two examples have used Javascript for coding as Postman Sandbox works in javascript. This code is not related to Postman in specific. Please refer to Javascript for the same.

Check the value

pm.expect(jsonData.age).to.eql(value);

pm.expect(jsonData.name).to.eql("string");

Convert XML body to JSON object

var jsonObject = xml2Json(responseBody);

Workflows

Setting the next request

postman.setNextRequest("Request Name");

Stop executing the request

postman.setNextRequest(null);

Chai Assertion Library

Find a number present in an array

pm.test(“Number included”, function(){
pm.expect([1,2,3]).to.include(3);
});

Check if an array is empty

pm.test(“Empty Array”, function(){
pm.expect([2]).to.be.an(‘array’).that.is.empty;
});

I hope this will serve as a quick reference point in your postman journey.

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