Tips for validating a JSON response by referencing a JSON test data file

Question

Tips for validating a JSON response by referencing a JSON test data file

Im working with a JSON response that has nested elements and I want to validate it against JSON test data using Postman and test functions.

Currently, I am able to do this by hardcoding the validation:

const jsonData = pm.response.json();
        
pm.expect(jsonData.items[0].title).to.eql(pm.iterationData.get("title"));
pm.expect(jsonData.items[1].title).to.eql(pm.iterationData.get("title"));

Here is an example of my JSON test data file:

[
  {
    "title": "Title1"
  },
  {
    "title": "Title2"
  }
]

My question is, how can I validate it in a different way while still using the JSON test data structure? For instance, if I have around 100 titles to verify in the JSON test data, I don't want to manually write out 100 lines...

Thank you in advance!

javascript json postman iteration test-data

Answer 1

Answer №1

Loop through the JSON test data Create a loop to go through the test data and verify the elements in the response.

// Sample JSON data
const jsonData = [
  {
    "title": "Title1"
  },
  {
    "title": "Title2"
  },
  {
    "title": "Title3"
  }
];

// Loop through the JSON data
jsonData.forEach((item, index) => {
  console.log(`Title of item ${index + 1}: ${item.title}`);
});

You can include conditions as needed

Answer 2

Loop through the JSON test data Create a loop to go through the test data and verify the elements in the response.

// Sample JSON data
const jsonData = [
  {
    "title": "Title1"
  },
  {
    "title": "Title2"
  },
  {
    "title": "Title3"
  }
];

// Loop through the JSON data
jsonData.forEach((item, index) => {
  console.log(`Title of item ${index + 1}: ${item.title}`);
});

You can include conditions as needed

Answer 3

Answer №2

When working with Postman scripts:

// Extract the JSON response
const jsonData = pm.response.json();

// Retrieve the test data
const testData = pm.variables.get("testData");

// Parse the test data if it's in JSON format
const parsedTestData = JSON.parse(testData);

// Check if the number of response items matches the test data length
pm.test("Verify response items count against test data count", function () {
    pm.expect(jsonData.items.length).to.eql(parsedTestData.length);
});

// Validate each item in the test data against the response
parsedTestData.forEach((testItem, index) => {
    pm.test(`Confirm title of item ${index}`, function () {
        pm.expect(jsonData.items[index].title).to.eql(testItem.title);
    });
});

I trust this information will be beneficial to you.

Answer 4

When working with Postman scripts:

// Extract the JSON response
const jsonData = pm.response.json();

// Retrieve the test data
const testData = pm.variables.get("testData");

// Parse the test data if it's in JSON format
const parsedTestData = JSON.parse(testData);

// Check if the number of response items matches the test data length
pm.test("Verify response items count against test data count", function () {
    pm.expect(jsonData.items.length).to.eql(parsedTestData.length);
});

// Validate each item in the test data against the response
parsedTestData.forEach((testItem, index) => {
    pm.test(`Confirm title of item ${index}`, function () {
        pm.expect(jsonData.items[index].title).to.eql(testItem.title);
    });
});

I trust this information will be beneficial to you.

Tips for validating a JSON response by referencing a JSON test data file

Answer №1

Answer №2

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