Data Driven : How to attach single json file to Postman collection runner having multiple APIs (requests) in it?

Ask the Experts and Postman Tips
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1

I am trying to automate the testing of different APIs. I have created collection in postman. There are multiple APIs present inside a collection and each API has different body structure (inputs) and different test cases. Each API should be tested for multiple testcases. e.g. API 1 has 2 Test cases and API 2 has 5.

API1

Testcase1
    input a
    input b
Testcase2
    input c
    input d

API2

Testcase1
    input 1
Testcase2
    input 2
Testcase3
    input 3
Testcase4
    input 4
Testcase5
    input 5

I want to send body of each API dynamically through JSON file.

I need a single JSON file which can contain data for all APIs.

is it possible? If yes, How can achieve it?

2

Yes. You can structure your json data file as below and then use the input in the API you want.

{
“input a”:“val”,
“input b”:“val”,
“input 1”:“val”,
“input 2”:“val”
}

3

Hi @vjjohnson04,

I tried your solution but It will be messy for more number of APIs.
Also for iteration 3, API 1 will not have any input so it will get failed.

4

Let me reform my query with more specific example.

I have 2 APIs named “LogIn” API and “search” API.

Request body for “LogIn” API is as follows,

  {	
     "userName": "{{username}}",
     "passWord": "{{password}}"
  }

I have created JSON file for “LogIn” API, which looks like,

image

Request body for “Search” API is as follows,

 {
    "Input":"{{value}}"
 }

There is an another JSON file for “Search” API is as follows
image

I want to run login API for two iterations(refer JSON for login) and search API for 5 iterations(refer JSON for search).

I want to automate testing of these two APIs using single JSON file (combination of these two files). Please suggest how should I achieve it?
Both the APIs are currently in same collection runner.

5

The way I would do this is by adding a Test Control file which would contain the below code.

var userName = pm.iterationData.get(“userName”);
var passWord = pm.iterationData.get(“passWord”);

if(userName !==“” && passWord !==“”){
pm.setNextRequest(“Login”);
} else {

    pm.setNextRequest("Search");
    
}

Hope this helps.