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White Box Testing is a software testing methodology whereby definite information of the inner workings of the tested item is used to choose proper test data.
During white box testing software testers use particular knowledge of programming code to inspect outputs (unlike black box testing). The test is correct only in that case if software tester recognizes what the program is supposed to do. Tester can then see if the program deviates from its purpose. White box testing does not compute for defects caused by neglect, and all visible code must also be readable. White Box Testing is also known as glass box, structural, clear box and open box testing.
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