Testing AWS Lambda Locally with SAM

This guide provides detailed steps on how to set up and test an AWS Lambda function locally using the AWS Serverless Application Model (SAM).

Initialize a SAM Project:

Start by initializing a new SAM project. Run the following command and follow the prompts, including entering a project name (e.g., sam-demo).
```
sam init
```
Edit the template.yaml File:

Open the template.yaml file in your project directory. Modify it to define your Lambda function, including necessary configurations and resources.
Modify the event.json file.

This file should reflect the event data that your Lambda function will consume. Ensure the structure matches what your Lambda function expects.
```
{
"key1": "value1",
"key2": "value2"
}
```
Set Up Dependencies:

Specify all the necessary dependencies in the requirements.txt file. This file should list all Python packages required by your Lambda function.
Build the Project:

Build your SAM project to prepare it for local testing. This will compile your function and its dependencies into a .aws-sam directory.
```
sam build
```
Invoke the Lambda Function Locally:

Finally, invoke your Lambda function locally to test it. Use the following command, replacing ChatFunction with your function's name and specifying the path to your event.json file.
```
sam local invoke ChatFunction -e events/event.json
```

This command will simulate the Lambda execution environment on your local machine and process the event defined in event.json.

JINO-ROHIT/test_lambda_locally_sam