Using Chai assertion library in Postman - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assert that the response status is 200.

Postman

pm.test('Status code is 200', function () {
    pm.response.to.have.status([1]);
});

Drag options to blanks, or click blank then click option'

A200

B404

C500

D201

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong status code like 404 or 500.

Forgetting to put the status code as a number.

The correct status code for a successful HTTP response is 200. Using pm.response.to.have.status(200) asserts this.

2fill in blank

medium

Complete the code to assert that the response body contains the string 'success'.

Postman

pm.test('Body contains success', function () {
    pm.expect(pm.response.text()).to.include([1]);
});

Drag options to blanks, or click blank then click option'

A'fail'

B'error'

C'success'

D'warning'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a word that does not appear in the response.

Not using quotes around the string.

The assertion checks if the response text includes the word 'success'. This confirms the expected message is present.

3fill in blank

hard

Fix the error in the assertion to check that the JSON response has a property 'id'.

Postman

pm.test('Response has id property', function () {
    pm.expect(pm.response.json()).to.have.[1]('id');
});

Drag options to blanks, or click blank then click option'

Alength

Bstatus

Cinclude

Dproperty

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'length' which checks array size, not property existence.

Using 'status' which is unrelated here.

The correct Chai assertion to check for a property in an object is to.have.property('id').

4fill in blank

hard

Fill both blanks to assert that the response JSON array length is greater than 0.

Postman

pm.test('Array length is positive', function () {
    pm.expect(pm.response.json().length).to.be.[1](0).[2](0);
});

Drag options to blanks, or click blank then click option'

AgreaterThan

Babove

Cbelow

Dequal

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'below' or 'equal' which check wrong conditions.

Mixing the order of chaining words.

Chai uses to.be.above(0) or to.be.greaterThan(0) to check if a number is greater than zero. Here, above and greaterThan are chained.

5fill in blank

hard

Fill all three blanks to assert that the response JSON object's 'name' property equals 'John'.

Postman

pm.test('Name is John', function () {
    pm.expect(pm.response.json().[1]).[2].[3]('John');
});

Drag options to blanks, or click blank then click option'

Aname

Bequal

Cto

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong property name.

Mixing the order of chaining words.

Using 'status' instead of 'equal'.

The correct assertion accesses the 'name' property, then uses to.equal('John') to check its value.