What is White Box Testing?

white box testing aka clear box testing, glass box testing, or structural testing is a testing method that tests the internal structure of an application. As opposed to black-box testing, it does not focus on the functionality but involves the line-to-line assessment of the code.

In white-box testing, the tester has to go through the code line by line to ensure that internal operations are executed as per the specification and all internal modules are properly implemented.

What is white box testing used for?

• Broken paths in coding
• Internal security holes
• The flow of the input
• poorly structured paths in the coding
• Expected output
• Conditional loops functionality
• Working flow of the application
• Test for objects, statements, and functions individually
• Involves integration and unit testing of software.

When to perform white box testing

It is done in the initial phases of Testing or at the final phase of development. Most of the time developers perform the initial unit testing to check the code broadly. It saves a lot of time as major issues are found in the initial phase hence saving a lot of time.

Why We Use White Box Testing?

To ensure:

• That all the paths are covered at least once.
• All logical decisions are based on true and false values.
• That all loops are tested

To discover the following types of bugs:

• Logical errors
• The design errors
• Typographical errors
• Syntax errors

Types of White Box Testing

Some renowned tools that can assist you in white box testing

#1) Veracode

#2) EclEmma

#3) RCUNIT 

#4) cfix

#5) Googletest 

#6) EMMA

Difference between black box and white box testing