@HttpPost

💬 In plain words: Unit testing an Apex REST service marked with @HttpPost requires manually setting up RestContext.request and RestContext.response , populating URI parameters or request payloads, and executing positive and negative assertion tests against database state. In Salesforce, the Apex programming language allows you to create powerful web services exposed to external systems for seamless data integration. A common scenario involves using the @HttpPost annotation within a @RestResource class to accept incoming REST requests. In this post, we'll walk through writing effective test classes for an @HttpPost Apex REST web service, setting up RestContext , and handling positive and negative scenarios to achieve robust code coverage.

💬 In plain words: An @HttpPost Apex REST web service allows outside applications to send JSON data directly into Salesforce. The server parses the incoming request payload, processes the data, and sends back a structured JSON response. Building custom web services in Salesforce allows external systems to interact with your org seamlessly. Using the @RestResource annotation alongside @HttpPost , you can easily expose Apex classes as custom REST API endpoints to accept incoming JSON payloads and return dynamic responses.