The API Testing is performed for the system, which has a collection of API that ought to be tested. During Testing, a test of following things is looked at.

  • Exploring boundary conditions and ensuring that the test harness varies parameters of the API calls in ways that verify functionality and expose failures.

  • Generating more value added parameter combinations to verify the calls with two or more parameters.

  • Verifying the behaviour of the API which is considering the external environment conditions such as files, peripheral devices, and so forth.

  • Verifying the Sequence of API calls and check if the API's produce useful results from successive calls.