What is API | Bondar Academy

Lesson Summary

In this module, we will explore APIs and how to leverage them in Cypress to enhance test execution by directly interacting with or mocking APIs. What is an API? An API (Application Programming Interface) facilitates communication between applications. A clearer definition might be Application Communication Interface , as it describes how clients (e.g., browsers) and servers communicate through requests and responses. API Communication Clients send requests to a server's API URL. The server processes the request and returns a response. API URL Components An API URL typically consists of: Protocol: Usually HTTPS . Domain: e.g., example.com . Path: e.g., /api/articles . Query Parameters: Key-value pairs, e.g., ?limit=10&offset=0 . API Request Methods Common HTTP methods include: POST: Create a new record. GET: Read a record. PUT: Update an existing record. DELETE: Remove a record. Client-Server Interaction When a client sends a POST request, it must include: URL Headers (e.g., authorization tokens) Request body (in JSON format) HTTP Response Status Codes 200: Success 400: Client error (e.g., 404 for not found) 500: Server error Cypress Testing Cypress can interact with APIs directly or mock responses to speed up tests. While mocking can improve speed, it may miss real integration issues. Cypress can also perform API testing, although it is not primarily designed for it. This module provides a comprehensive introduction to APIs and their integration with Cypress. We will delve deeper into these concepts in the upcoming lessons.