Failure to execute pre-request script that uses cookieJar.clear()

[jhulme]

When running a simple collection that contains a single request with a pre-request script via Newman, the pre-request script fails to execute if attempting to clear cookies for the domain from CookieJar. Issue is not present when running within Postman application.

1. Newman Version (can be found via newman -v): 5.3.2
2. OS details (type, version, and architecture): Windows 10 - WSL2 Ubuntu 18.04
3. Are you using Newman as a library, or via the CLI? CLI
4. Did you encounter this recently, or has this bug always been there: Recently
5. Expected behaviour: Execute pre-request script that contains call to cookieJar.clear()
6. Command / script used to run Newman: newman run https://api.getpostman.com/collections/XXXX-XXXXXX-XXXXX-XXXX?apikey=PMAK-XXXX-XXXX-XXXXXXX-XXXX -x -r cli --insecure
7. Sample collection, and auxiliary files (minus the sensitive details):

console.log("Setting dog breed environment variable...")
pm.environment.set("Breed", "Lurcher")

//COMMENT THESE LINES OUT TO RESOLVE ISSUE
const cookieJar = pm.cookies.jar()
cookieJar.clear("dog.ceo")
//

let req = {
    method: 'GET',
    url: "https://dog.ceo/api/breeds/list/all"
}

console.log("Sending request...")

pm.sendRequest(req, (err, response) => {
    console.log("Obtaining Buhund Sub-Breed List...")
    let jsonResponse = response.json()
    let buhund = jsonResponse.message["buhund"][0]

    console.log(buhund)
    pm.environment.set('buhundsub', buhund);
})

7. Screenshots (if applicable): Pre-Request script fails to execute

CookieJar lines commented out, Pre-Request script executes

Steps to replicate:

1. Create new request - GET https://dog.ceo/api/breeds/image/random
2. Add pre-request script above
3. Run in Postman application. Confirm that pre-request script executes.
4. Run via Newman CLI. Note that pre-request script does not execute in full.
5. Comment out cookieJar lines.
6. Run via Newman CLI. Pre-request script executes in full.

Do I need to specify a specific file to newman via the cookie-jar flag? If so what format should be expected? I have attempted to pass a simple .json file using the following contents.

{
    "name": "session",
    "value": "x",
    "domain": "dog.ceo",
    "path": "/",
    "expires": 1677666564,
    "httpOnly": false,
    "secure": false
}

However in this case newman returns an error advising that error: the file at files/jar.json does not contain valid JSON data. Although the dataset above appears to be passing when tested with an external JSON validator.

[robstoll]

a bit late but maybe better than never, the json looks as follows:

{
  "version": "[email protected]",
  "storeType": "MemoryCookieStore",
  "rejectPublicSuffixes": false,
  "enableLooseMode": true,
  "allowSpecialUseDomain": true,
  "prefixSecurity": "silent",
  "cookies": [
    {
      "key": "cookieName",
      "value": "Value",
      "expires": "2025-02-27T10:47:50.000Z",
      "maxAge": 2419200,
      "domain": "example.com",
      "path": "/",
      "secure": true,
      "httpOnly": true,
      "hostOnly": true,
      "creation": "2025-01-30T10:47:51.029Z",
      "lastAccessed": "2025-01-30T11:17:56.447Z"
    }
  ]
}