Tests tab and pm.test() in Postman - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the test result of this Postman test script?

Consider this Postman test script in the Tests tab:

pm.test("Status code is 200", function () {
    pm.response.to.have.status(200);
});
pm.test("Response time is less than 500ms", function () {
    pm.expect(pm.response.responseTime).to.be.below(500);
});

Assuming the response status is 200 and response time is 450ms, what will be the test execution result?

Postman

pm.test("Status code is 200", function () {
    pm.response.to.have.status(200);
});
pm.test("Response time is less than 500ms", function () {
    pm.expect(pm.response.responseTime).to.be.below(500);
});

A Both tests pass

B First test fails, second test passes

C First test passes, second test fails

D Both tests fail

💡 Hint

Check the status code and response time conditions carefully.

The first test checks if the status code is exactly 200, which it is. The second test checks if the response time is below 500ms, which 450ms satisfies. So both tests pass.

❓ assertion

intermediate

Which pm.test assertion correctly checks if JSON response has a key 'userId'?

You want to write a test in Postman to verify that the JSON response body contains the key 'userId'. Which pm.test assertion below will correctly do this?

A pm.test("Response has userId", () => { pm.expect(pm.response.json().userId).to.exist; });

B pm.test("Response has userId", () => { pm.expect(pm.response.json()).to.have.property('userId'); });

C pm.test("Response has userId", () => { pm.expect(pm.response.json().has('userId')).to.be.true; });

D pm.test("Response has userId", () => { pm.expect(pm.response.json().includes('userId')).to.be.true; });

💡 Hint

Check which method correctly tests for a property in an object.

Option B uses the correct Chai assertion to check if the JSON object has the property 'userId'. Option B uses 'to.exist' on a value which may fail if userId is falsy. Option B and D use invalid methods for objects.

🔧 Debug

advanced

Why does this pm.test fail with a TypeError?

Look at this Postman test code:

pm.test("Check user name", function() {
    let jsonData = pm.response.json;
    pm.expect(jsonData.name).to.eql("Alice");
});

What causes the TypeError during test execution?

Postman

pm.test("Check user name", function() {
    let jsonData = pm.response.json;
    pm.expect(jsonData.name).to.eql("Alice");
});

A The test function is missing a return statement

B pm.expect is not defined in the Tests tab

C pm.response.json is a function and needs to be called as pm.response.json()

D The property 'name' does not exist in the response

💡 Hint

Check how to correctly get JSON data from the response.

pm.response.json is a function that returns the parsed JSON body. Without parentheses, jsonData is assigned the function itself, causing a TypeError when accessing .name.

🧠 Conceptual

advanced

What is the purpose of pm.test() in Postman?

Select the best description of what pm.test() does in Postman test scripts.

A It sends the HTTP request to the server and waits for the response.

B It automatically retries the request if the test fails.

C It logs the response body to the Postman console for debugging.

D It defines a test case with a name and a function containing assertions to validate the response.

💡 Hint

Think about how tests are structured in Postman.

pm.test() wraps assertions inside a named test case. It does not send requests, log output, or retry requests.

❓ framework

expert

Which option correctly waits for a response before running pm.test assertions in Postman?

You want to write a test script that runs assertions only after the response is fully received. Which code snippet correctly ensures this in Postman?

A pm.sendRequest(request, function (err, res) { pm.test("Status is 200", () => { pm.expect(res).to.have.property('code', 200); }); });

B pm.test("Status is 200", () => { pm.expect(pm.response.code).to.equal(200); });

C pm.response.on('complete', () => { pm.test("Status is 200", () => { pm.expect(pm.response.code).to.equal(200); }); });

D pm.waitForResponse(() => { pm.test("Status is 200", () => { pm.expect(pm.response.code).to.equal(200); }); });

💡 Hint

Check which method uses a callback after the request completes.

Option A uses pm.sendRequest with a callback that runs tests after the response arrives. Option A runs tests immediately on the current response. Options C and D use non-existent event or method.