Grey Box Testing is the high-level software testing method and a mixture of white box and black box testing methods. It not only determines the problem or error, but it also resolves the exact happening for the error. It gives an idea to a developer where exactly the error was and why it caused. Its main purpose is to determine the terrible implementation of the system under testing.
Gray Box testing is based on the concept of the end user view test. Testing is conducted from the user point of view. It involves a limited series of inputs plus outputs to conduct the test. After that, the test is performed based on the internal working of software architecture, algorithm view, program description and a lot more.
Following two types of issues can be encountered while conducting grey-box testing:
There are several advantages of using Gray-Box approach for software testing:
Consider the example where you have to test simple email authentication web form. Email validation that happens at client side using JavaScript; is to be checked. If implementation details are provided than few assumptions can be made such as:
Now performing gray box test, test case will be prepared considering that client has disabled JavaScript on the browser. With the failure of system assumptions made previously, following scenario can be presented:
The Gray Box method techniques:
Puzzle in the mind will be that why it is named “Gray” testing. Here is the solution to your puzzle. It is named “Gray” box testing approach because when the testertest the application; partial working of internal system of software will be known; but it is not known completely so the name gray box comes in existence. For testingmost of the web service application as well as business domain functionality, “Gray Box” testing approach is widely used.
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