The following section lists a few API testing best practices you should know about. To start with, the following are test case best practices:

• Group API test cases by test category (unit tests, functional tests, security tests, and so on)
• Ensure test cases indicate the declarations of involved (called) APIs on top of each test case
• Ensure parameter selections are mentioned explicitly in the test case itself
• Executes test cases independently, that is, each test case is a self-contained and an independent entity
• prioritize API calls, which helps to simplify API testing
• Keep test cases free from test chaining (reusing test data objects created by other tests)
• Test cases deal with one-time call functions such as delete, close window, asynchronous calls, and so need special attention to avoid undesirable executions
• Ensure API call sequences are well planned and also have clear execution plans
• Create test cases for every possible known input combination of the API, as this leads to better test coverage of the underlying APIs