What is Interface Testing?
We define Interface Testing as a software testing type that verifies whether two different software systems communicate correctly.
A connection that integrates two components is called interface. This interface in a computer world could be anything like API`s, web services, etc. Testing of these connecting services or interface is referred to as Interface Testing. An interface is actually software that consists of a set of instructions, messages, and other attributes that enable communication between a device and a user.
How to run interface tests:-
Testing the interface includes testing two major segments:
Web server and application server interface
Application server and database server interface.
Interface tests are performed against the above scenarios.
Check if the server is working properly
The application handles errors gracefully or returns error messages for all queries.
If the connection to the web server is reset during the process, check the results.
Examples :-
Suppose for any xyz application, the interface takes XML record as an enter and grants JSON record as an output. To check the interface of this application, all it calls for is the specs of XML record layout and JSON record layout.
You can use these specifications to create a sample input XML file and feed it into the interface. We validate the input (XML) and output (JSON) files according to the ‘Interface Test’ requirements.
Why do interface testing?
Interface testing is done :
To ensure that end users or customers do not have problems using certain software products;
Identify areas of the application that end users typically access and validate their usability.
To check security requirements during communication between systems
To test whether your solution can handle network outages between your application server and your website.
Types:-
During interface testing, we perform various types of tests on the interface, including:
Workflow: Ensures that the interface engine handles standard workflows as expected.
Edge case – Unexpected values: We take this into account when swapping the date, month, and day during testing.”
Performance, load, and network testing: Depending on the interface engine and connectivity infrastructure, high-capacity interfaces may require more load testing than low-capacity interfaces.
Individual systems: This also includes testing each system individually. For example, a retail store’s billing system and inventory management system must be able to function separately.
Its strategy :-
In this strategy is a method of testing interfaces using common tests regardless of implementation. You can use abstract test cases to create concrete instances of test cases for each implementation of your interface testing strategy. Basic/abstract test cases perform implementation-independent tests, whereas concrete tests handle the instantiation of the object under test and the execution of implementation-specific tests.
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