Assert that a Array of JSONs contains one property

Question

I have a device store project that allows to add/delete/edit devices and I'm trying to test in postman that after a POST ,that adds a device to the list ,the device can be found in my response body.I'm using Postman BDD and the Chai sintax

[
{
    "deviceid": "5a72fec0-a220-4484-a058-e1e56dfc56c5",
    "name": "Huawei",
    "alias": "electronics",
    "quantity": 10,
    "price": 200,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "90807800-c66c-46ec-ae46-687464e62797",
    "name": "Pixel 2",
    "alias": "electronics",
    "quantity": 10,
    "price": 300,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "c2bd507d-e544-4ce8-b272-34cab732adb4",
    "name": "SONYk",
    "alias": "electronicsm",
    "quantity": 122,
    "price": 2222,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "caa97d05-2672-48c5-8c56-e0da1298b20d",
    "name": "ASUS1",
    "alias": "electronics",
    "quantity": 1222,
    "price": 2222,
    "categoryid": "11535983-b9d0-4a0f-8d53-ca204446e0b8",
    "links": []
}

]

This is my response , as it can be seen it return a Array of JSONs and I'm looking for an elegant way to assert that the device with the property "Pixel 2" is in the Array. I'm open to any other javascript librarys that can help me achieve this thing.

score 2 · Accepted Answer · answered Jul 24 '17 at 08:14

You can use find method which accepts a callback provided function.

var array=[
{
    "deviceid": "5a72fec0-a220-4484-a058-e1e56dfc56c5",
    "name": "Huawei",
    "alias": "electronics",
    "quantity": 10,
    "price": 200,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "90807800-c66c-46ec-ae46-687464e62797",
    "name": "Pixel 2",
    "alias": "electronics",
    "quantity": 10,
    "price": 300,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "c2bd507d-e544-4ce8-b272-34cab732adb4",
    "name": "SONYk",
    "alias": "electronicsm",
    "quantity": 122,
    "price": 2222,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "caa97d05-2672-48c5-8c56-e0da1298b20d",
    "name": "ASUS1",
    "alias": "electronics",
    "quantity": 1222,
    "price": 2222,
    "categoryid": "11535983-b9d0-4a0f-8d53-ca204446e0b8",
    "links": []
}];
var item=array.find(function(item){
  return item.name=="Pixel 2";
});
console.log(item);
console.log("Exists: "+item!=undefined);

Another method is to use includes function.

var array=[
{
    "deviceid": "5a72fec0-a220-4484-a058-e1e56dfc56c5",
    "name": "Huawei",
    "alias": "electronics",
    "quantity": 10,
    "price": 200,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "90807800-c66c-46ec-ae46-687464e62797",
    "name": "Pixel 2",
    "alias": "electronics",
    "quantity": 10,
    "price": 300,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "c2bd507d-e544-4ce8-b272-34cab732adb4",
    "name": "SONYk",
    "alias": "electronicsm",
    "quantity": 122,
    "price": 2222,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "caa97d05-2672-48c5-8c56-e0da1298b20d",
    "name": "ASUS1",
    "alias": "electronics",
    "quantity": 1222,
    "price": 2222,
    "categoryid": "11535983-b9d0-4a0f-8d53-ca204446e0b8",
    "links": []
}];
var exists=array.map(function(item){
  return item.name;
}).includes("Pixel 2");
console.log(exists);

score 1 · Answer 2 · answered Jul 24 '17 at 08:14

1

You can use Array#some:

response.some( o => o.name == "Pixel 2" )

The result is a boolean.

answered Jul 24 '17 at 08:14

trincot

317,000
35
244
286

score 1 · Answer 3 · answered Jul 24 '17 at 08:14

1

No library needed. You can use Array.prototype.some:

if (response.some(i => i.name == 'Pixel 2')) {
  // ...
}

answered Jul 24 '17 at 08:14

casraf

21,085
9
56
91

score 0 · Answer 4 · answered Jul 24 '17 at 08:16

Use Array#filter with Array#length to find if your item exists

const array = [{
        "deviceid": "5a72fec0-a220-4484-a058-e1e56dfc56c5",
        "name": "Huawei",
        "alias": "electronics",
        "quantity": 10,
        "price": 200,
        "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
        "links": []
    },
    {
        "deviceid": "90807800-c66c-46ec-ae46-687464e62797",
        "name": "Pixel 2",
        "alias": "electronics",
        "quantity": 10,
        "price": 300,
        "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
        "links": []
    },
    {
        "deviceid": "c2bd507d-e544-4ce8-b272-34cab732adb4",
        "name": "SONYk",
        "alias": "electronicsm",
        "quantity": 122,
        "price": 2222,
        "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
        "links": []
    },
    {
        "deviceid": "caa97d05-2672-48c5-8c56-e0da1298b20d",
        "name": "ASUS1",
        "alias": "electronics",
        "quantity": 1222,
        "price": 2222,
        "categoryid": "11535983-b9d0-4a0f-8d53-ca204446e0b8",
        "links": []
    }
];

const hasPixel2 = array.filter(item => item.name === 'Pixel 2').length > 0;
console.log(hasPixel2);

score 0 · Answer 5 · answered Jul 24 '17 at 08:18

Or Array#Filter

var array=[
{
    "deviceid": "5a72fec0-a220-4484-a058-e1e56dfc56c5",
    "name": "Huawei",
    "alias": "electronics",
    "quantity": 10,
    "price": 200,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "90807800-c66c-46ec-ae46-687464e62797",
    "name": "Pixel 2",
    "alias": "electronics",
    "quantity": 10,
    "price": 300,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "c2bd507d-e544-4ce8-b272-34cab732adb4",
    "name": "SONYk",
    "alias": "electronicsm",
    "quantity": 122,
    "price": 2222,
    "categoryid": "91a71dc0-4d40-4d20-a59d-bb30a348a7f2",
    "links": []
},
{
    "deviceid": "caa97d05-2672-48c5-8c56-e0da1298b20d",
    "name": "ASUS1",
    "alias": "electronics",
    "quantity": 1222,
    "price": 2222,
    "categoryid": "11535983-b9d0-4a0f-8d53-ca204446e0b8",
    "links": []
}];
var item = array.filter(item => item.name === "Pixel 2");
console.log(item);

Assert that a Array of JSONs contains one property

5 Answers5