Response body array assertions in Postman - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the response body is an array.

Postman

pm.test("Response is an array", function () {
    pm.expect(Array.isArray([1])).to.be.true;
});

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

Apm.response.text()

Bpm.response.json()

Cpm.response.body

Dpm.response.headers

Attempts:

3 left

💡 Hint

Common Mistakes

Using pm.response.text() returns a string, not JSON.

Using pm.response.body is not a function and will cause errors.

We use pm.response.json() to parse the response body as JSON. Then Array.isArray() checks if it is an array.

2fill in blank

medium

Complete the code to assert the array length is 5.

Postman

pm.test("Array length is 5", function () {
    pm.expect([1].length).to.eql(5);
});

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Apm.response.json()

Bpm.response.status

Cpm.response.headers

Dpm.response.text()

Attempts:

3 left

💡 Hint

Common Mistakes

Using pm.response.text() returns a string, so length is string length, not array length.

Using pm.response.headers or status does not return the array.

We get the JSON array with pm.response.json() and check its length property.

3fill in blank

hard

Fix the error in the assertion to check the first item's id equals 10.

Postman

pm.test("First item id is 10", function () {
    pm.expect([1][0].id).to.eql(10);
});

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

Apm.response.text()

Bpm.response.body

Cpm.response.json()

Dpm.response.status

Attempts:

3 left

💡 Hint

Common Mistakes

Using pm.response.text() returns a string, so indexing with [0] accesses the first character, not the first array item.

Using pm.response.body or status does not return the JSON array.

We must parse the response as JSON to access array elements and their properties.

4fill in blank

hard

Fill both blanks to assert every item in the array has a 'name' property.

Postman

pm.test("Every item has a name", function () {
    const jsonData = pm.response.json();
    const allHaveName = jsonData.every(item => item[1]('name'));
    pm.expect(allHaveName).to.be.true;
});

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

AhasOwnProperty

B===

Cin

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'in' operator incorrectly in this context.

Using '==' or '===' instead of hasOwnProperty method.

We use hasOwnProperty method to check if each item has the 'name' property.

5fill in blank

hard

Fill all three blanks to assert the array contains an item with id 20.

Postman

pm.test("Array contains item with id 20", function () {
    const jsonData = pm.response.json();
    const hasId20 = jsonData.some(item => item[1] [2] [3]);
    pm.expect(hasId20).to.be.true;
});

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

Aid

B===

C20

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '===' can cause unexpected results.

Using wrong property name or value.

We check if some item has id === 20 using the some method.