Wednesday, 26 April 2017

API (Application Programming Interface) - Set of Routines, Protocols, and Tools for building Software Applications


API stands for Application Programming Interface, which specifies how one component should interact with the other. It consists of a set of routines, protocols and tools for building the software applications.

What is an API Testing?
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.


Common Tests performed on API's

·        Return Value based on input condition - The return value from the API's are checked based on the input condition.
·        Verify if the API's does not return anything.
·        Verify if the API triggers some other event or calls another API. The Events output should be tracked and verified.
·        Verify if the API is updating any data structure.

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