Postmantesting~15 mins

POST request in Postman - Build an Automation Script

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Learn Why Deep Trace Try Challenge Automate Recall Frame

Verify POST request creates a new user successfully

Preconditions (3)

Step 1: Open Postman and create a new POST request

Step 2: Enter the URL https://api.example.com/users in the request URL field

Step 3: Select POST method

Step 4: Go to the Body tab and select raw JSON format

Step 5: Enter the following JSON data: {"name": "John Doe", "email": "john.doe@example.com"}

Step 6: Click Send button

Step 7: Observe the response status code and body

✅ Expected Result: Response status code is 201 Created and response body contains the new user's id, name as 'John Doe', and email as 'john.doe@example.com'

Automation Requirements - Postman test scripts (JavaScript)

Assertions Needed:

Status code is 201

Response body contains 'id' field

Response body 'name' equals 'John Doe'

Response body 'email' equals 'john.doe@example.com'

Best Practices:

Use pm.response.to.have.status() for status code assertion

Parse response JSON with pm.response.json()

Use pm.expect() for assertions

Keep test scripts clear and simple

Automated Solution

Postman

pm.test('Status code is 201', () => {
    pm.response.to.have.status(201);
});

const responseJson = pm.response.json();
pm.test('Response has id field', () => {
    pm.expect(responseJson).to.have.property('id');
});
pm.test('Name is John Doe', () => {
    pm.expect(responseJson.name).to.eql('John Doe');
});
pm.test('Email is john.doe@example.com', () => {
    pm.expect(responseJson.email).to.eql('john.doe@example.com');
});

This Postman test script checks the response after sending a POST request to create a user.

First, it verifies the status code is 201, which means the user was created successfully.

Then, it parses the response body as JSON to access its fields.

It asserts that the response contains an 'id' field, confirming the user has an identifier.

Finally, it checks that the 'name' and 'email' fields in the response match the data sent in the request.

These steps ensure the POST request worked as expected.

Common Mistakes - 3 Pitfalls

Not checking the status code before parsing response

Using incorrect JSON format in request body

Hardcoding values without verifying response fields exist

Bonus Challenge

Now add data-driven testing with 3 different user data inputs to verify POST request creates users correctly

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