What are the Common Tests that Performed on API?

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Here, are the common tests that performed on API are as:

  1. Response of the API should be verified based on the request. We will verify that the return value is based on request.
  2. When API is updating any data structure we should verify the system is authenticating the outcome.
  3. We will verify whether the API is trigger other event or request another API.
  4. We will verify the behavior of the API when no value is return.