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What is API Testing?

April 26, 2017API Testing

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What is API Testing?

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An API (Application Programming Interface) is a collection of software functions and procedures, called API calls, that can be executed by other software applications. Application developers code that links to existing APIs to make use of their functionality. This link is seamless and end-users of the application are generally unaware of using a separately developed API. During testing, a test harness-an application that links the API and methodically exercises its functionality-is constructed to simulate the use of the API by end-user applications. The interesting problems for testers are: 1. Ensuring that the test harness varies parameters of the API calls in ways that verify functionality and expose failures. This includes assigning common parameter values as well as exploring boundary conditions. 2. Generating interesting parameter value combinations for calls with two or more parameters. 3. Determining the content under which an API call is made. This might include setting externa