The document categorizes API testing into large, medium, and small tests. It also categorizes automation into UI, API, and unit tests. While unit tests and API tests are both code level, unit tests do not query databases, communicate over networks, access file systems, or run multiple tests concurrently like API tests can. The document provides examples of API test cases, such as testing return values based on inputs, tests with no returns, tests that trigger other APIs or events, and tests that modify resources.

1. API Testing
Magus Chen
maguschen@gmail.com
http://magustest.com/blog

2. Categorization of Tests
Large
Medium
Small

3. Categorization of Automation
UI
API Test
Unit Test

4. Unit Test vs. API Test
● Common
○ Code level
○ May need to read the code under test (white box test)
● Unit test won't:
○ Query on Database
○ Communicate across network
○ Touch file system
○ Run several tests at the same time

5. Test Cases for API Test
● Return value based on input condition
● Does not return anything
● Trigger some other API/event/interrupt
● Modify certain resources