Question

92

Postman: How to check the data type of each value in a response

rated 0 times [ 96] [ 4] / answers: 1 / hits: 17986 / 6 Years ago, tue, february 13, 2018, 12:00:00

How do I check that the data type of each value in an API response is NOT an integer?

For example, if my API returns this:

 teamPermissions: [

    Edit,

    Administrator,

    ReadOnly,

    etc

    ]

I need a Postman test to make sure that an integer is never returned in the teamPermission array.

Here's what I started but need assistance:

var jsonData = JSON.parse(responseBody);

tests[Team Permissions Do Not Contain Integers] = typeof(jsonData.teamPermissions) !== number

This passes because teamPermissions is an object but how do I check each value of the object is not an integer?

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bradenc

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2 Years ago

answered 6 Years ago terrence · Accepted Answer

This should do the check for you:

pm.test('Not contain numbers', () => {

    var jsonData = pm.response.json()

    for (i = 0; i < jsonData.teamPermissions.length; i++) {

        pm.expect(jsonData.teamPermissions[i]).to.not.be.a('number')

    }

})

Here's what the check will do if a number is part of the array, I've logged out the types so you can see what it's checking against.

Another alternative is to use Lodash, it's a build-in module for the Postman native app. This code will run the same check as the one above:

pm.test('Not contain numbers', () => {

    _.each(pm.response.json().teamPermissions, (arrItem) => {

        pm.expect(arrItem).to.not.be.a('number')

    })

})