An application programme interface (API) is examined during an API test to ensure that it satisfies the requirements for functionality, security, performance, and dependability. Either on the API directly or as a component of integration testing, the tests are run.
API testing can be done in two ways :
1) Manual
2) Automatic
In manual API testing we can test the API ourself by creating your own code.
In automatic API testing using a testing tool to automate the execution of API tests at predetermined intervals, or as part of CI/CD pipelines.
Here are a few recommendations for API testing best practises:
1.Choose the API testing tool that best meets the needs of your project.
2.Organize test cases according to test categories.
3.For API testing, simulate the final surroundings.
4.Make test cases for any combination of API inputs that is conceivable.
5.Negative and security tests should receive due importance.
6.Keep track of and precisely record each API answer.
7.Call sequencing is always tested for the typical or expected outcomes.
8.Keep the tests as separated as you can from as many variables as you can.
9.Use automation whenever it can be helpful.
10.Use API function calls to facilitate quick yet effective testing.