Serverless - Deploying applications with SAM > Test APIs by Postman

Test APIs by Postman

In this step, we will test operation of the APIs using Postman tool.

Test the listing API

Click + to add a new tab

Select GET method
Enter URL of the listing API that recorded from the previous step
Click Send

TestListAPI

The returned result is the entire data of the Books table that has been processed

TestListAPI

Test the writing API

Similarly create a new tab

Select POST method
Enter URL of the writing API that recorded from the previous step
In Body pattern, select raw
Copy the below text block:

{
    "id": "5",
    "rv_id": 0,
    "name": "Amazon Web Services in Action 2nd Edition",
    "author": "Andreas Wittig",
    "price": "59.99",
    "category": "IT",
    "description": "Amazon Web Services in Action, Second Edition is a comprehensive introduction to computing, storing, and networking in the AWS cloud. You'll find clear, relevant coverage of all the essential AWS services you to know, emphasizing best practices for security, high availability and scalability.",
    "image": "https://book-image-resize-store.s3.ap-southeast-2.amazonaws.com/aws.jpg"
}

TestCreateAPI

Switch to Headers

Add KEY is Content-Type, VALUE is application/json
Click Send

TestCreateAPI

Wait a moment, see the results returned

TestCreateAPI

Open Books table in DynamoDB console to check data

Before call the write API

TestCreateAPI

After call the write API

TestCreateAPI

Test the deleting API

Since the delete Lambda function on execution deletes images uploaded by the user, we manually upload the images to the S3 bucket so the API can run properly.