How to assert array in array?

Question

Can somebody please help me to assert array in array in postman ?

I have this peace of code:

"documents": [
        {
            "fileName": "file01_guid.pdf",
            "documentType": "document",
            "parentFiles": [
                "file01.pdf"
            ]
        },
        {
            "fileName": "file02_guid.pdf",
            "documentType": "document",
            "parentFiles": [
                "file01.pdf"
            ]
        }

I need to assert the "ParentFiles" array using this method:

var array = [];
var range = (json_response.data.documents).length

for (var i = 0; i < range; i++)

{
 var file = json_response.data.documents[i].fileName
 var type = json_response.data.documents[i].documentType;

 array.push(file)
 array.push(type)
}

So I could write this kind of test:

{
    pm.expect(array).to.include("file01.pdf", "file01.pdf");
});

Thank you in advance

what you want to assert ? why are you pushind document type also ? — PDHide
– PDHide, Commented Mar 10, 2021 at 13:28
I want to assert the parentFiles array using "include" function, like I've described it in my post. I'm stuck a little — Lexamenrf
– Lexamenrf, Commented Mar 10, 2021 at 13:34
you want to assert parentFile array of each object or you want to assert the new array with some array — PDHide
– PDHide, Commented Mar 10, 2021 at 13:35
If there are two ways on how to approach my goal then - I want to know both. — Lexamenrf
– Lexamenrf, Commented Mar 10, 2021 at 13:36

Mr. Polywhirl · Accepted Answer · 2021-03-10 14:17:47Z

1

You can verify if "file01.pdf" exists by simply filtering and checking the length. You can also build your array more efficiently by reducing.

const json_response = {
  "data": {
    "documents": [{
      "fileName": "file01_guid.pdf",
      "documentType": "document",
      "parentFiles": ["file01.pdf"]
    }, {
      "fileName": "file02_guid.pdf",
      "documentType": "document",
      "parentFiles": ["file01.pdf"]
    }]
  }
};

const array = json_response.data.documents.reduce((acc, doc) => {
  const { fileName, documentType, parentFiles: [ pfName ] } = doc;
  return [ ...acc, fileName, documentType, pfName ];
}, []);

console.log(array);

// Exactly two instances of "file01.pdf" exist.
console.log(array.filter(val => val === "file01.pdf").length === 2);

.as-console-wrapper { top: 0; max-height: 100% !important; }

If you just want to compare the arrays, you can try the following:

const json_response = {
  "data": {
    "documents": [{
      "fileName": "file01_guid.pdf",
      "documentType": "document",
      "parentFiles": ["file01.pdf"]
    }, {
      "fileName": "file02_guid.pdf",
      "documentType": "document",
      "parentFiles": ["file01.pdf"]
    }]
  }
};

const allEqual = json_response.data.documents
  .every(({ parentFiles: [ filename ] }) => filename === "file01.pdf");

console.log(allEqual);

.as-console-wrapper { top: 0; max-height: 100% !important; }

edited Mar 10, 2021 at 14:17

answered Mar 10, 2021 at 13:36

Mr. Polywhirl

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4 Comments

PDHide Over a year ago

why can't you just use lodash ?

Mr. Polywhirl Over a year ago

@PDHide because JavaScript has evolved and dependencies are extra overhead.

Mr. Polywhirl Over a year ago

@PDHide The code works in NodeJS too, it is not DOM-manipulation (or dependent) code.

Lexamenrf Over a year ago

@Mr.Polywhirl In the end I've decided to use your method:

const array = json_response.data.documents.reduce((acc, doc) => {   const { fileName, documentType, parentFiles: [ pfName ] } = doc;   return [ ...acc, fileName, documentType, pfName ]; }, []);

Because I the response, the documents can be different. I've studied your method and it totally fits to my needs. Thank you

PDHide · Accepted Answer · 2021-03-10 15:41:28Z

0

you can loop using foreach and compare the values

//store expected files in order
array=["file01.pdf","file01.pdf"]

//now forEach on each element
json_response.data.documents.forEach( (elem,index,arr)=>{
pm.expect(elem.parentFiles[0]).to.be.eql(array[index])
})

If you just want to compare two arrays then:

pm.expect(_.isEqual(array,array2)).to.be.true

lodash isEqual can be used to compare two object like arrays

edited Mar 10, 2021 at 15:41

answered Mar 10, 2021 at 13:57

PDHide

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2 Comments

Lexamenrf Over a year ago

I have not understood your "loop" option. When I've tried:

pm.test('parentFiles equal "BR_21080_file18.pdf"', function()      {         array=["file01.pdf","file01.pdf"]          pm.response.json().documents.forEach( (elem,index,arr)=>{         pm.expect(elem.parentFiles[0]).to.be.eql(array[index])     })});

I've received "parentFiles equal "file18.pdf" | TypeError: Cannot read property 'forEach' of undefined"

PDHide Over a year ago

is the updated code json_response.data.documents

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