White Box Testing

Definition – What is White Box Testing ?

White box testing is the testing of infrastructure and internal coding of a software application.

It focuses on the flow of outputs and inputs through the design, usability and application. Main motive is strengthening security..

White box testing is also recognized as structural, clear, open and glass box testing.

White box testing is depended on the inner working function of any software application and rotates around inside testing. The expression whitebox was used due to see-from side to side box theory.

What do you verify in White Box Testing?

i.                    Inner security holes

ii.                  Poorly structured or Broken coding standard

iii.                Confirm the flow of output and inputs by the coding structure

iv.                Output expectation

v.                  Conditional loops functionality

vi.                Testing of function, object and statement on the basis of individual

This testing need to perform on the unit, integration and system level of software development. Basic motive of this testing is to verify the working flow for a software application.

How you can perform White Box Testing?

There are two basic steps which are used in white box testing technique:

Step1- UNDERSTAND THE SOURCE CODE

First step is that Tester need to understand the source code and its flow, because without knowing this, Tester never can verify the code functionality and standards.

Step2 – CREATE TEST CASES AND EXECUTE

After understanding the source code, now tester will create the test cases and execute these. Requirement for White Box testing are Tester need the knowledge of source code there fore it’s done by the software engineers.

White Box Testing Techniques

Code Coverage Analysis is the main White Box Testing technique. It eliminates the difference in between the test case suites. First it identifies the scope of software application which is remained in test cases. Once these gaps are recognized, we will create test cases or suits to test the untested parts of code. This will definitely increased the quality of software product.

Following are the main coverage analysis techniques:

Statement Coverage: This technique will cover all maximum statement or scope of software application for testing. All code should be tested at least once during this verification process.

Branch Coverage – This technique verify all possible conditions (i.e. if-else and other loops of conditional) of a software application

Except from the mentioned above some separate coverage types like function coverage, path coverage, multiple condition coverage etc. each of these have their own merits and attempts to cover all case of programming code.

Types of White Box Testing

Unit Testing: First as other we test the code for software unit to confirm the unit input and output flow of data.

Memory Leaks Testing: Memory leaks are due to slow motion of soft wares.

Penetration Testing by White Box: In this type tester have full knowledge source code and test the software from every angle.

Mutation Testing by White Box: This is for enhancement of the coding  standard, which can expand the software application.

Software Testing Principle	Software Development Life Cycle	Unit Testing
Integration Testing	System Acceptance Testing	Sanity and Smoke Testing
Regression Testing	Non Functional Testing	Test Case
Test Scenario	Software Testing Rules	SQL For Software Testing
Test Case Design and Example	Test Base	Traceability Matrix
Boundary Value analysis	Decision Table in Software Testing	State Transition Definition
Use Case Testing	Testing Review	Techniques of Test Estimation
Test Plan Structure	Definition of Bug	Bug Life Cycle
Automation Testing Tools	Test Web Based Application	Software Testing Types
Software Testing Techniques	Techniques in Software Testing	Test Data
Software Testing Life Cycle	Black Box Testing	Difference between Black Box testing and White Box Testing
Smoke and Sanity Testing	Testing Methodology	Extreme Programming
White Box Testing	System Software Testing	Performance Testing
Usability Testing	User Acceptance Testing	Regression Testing
MANUAL SOFTWARE TESTING	Automation software Testing	Functional Testing

Real world scenario for white box testing, Definition, verification, how we perform,  What is White Box Testing, techniques and types of white box testing, structural, clear, open and glass box testing, Code Coverage, Statement, Branch Analysis, Memory Leaks, Penetration, Mutation Testing

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