White box testing is a software testing method that tests the internal structure or workings of an application. It requires access to and an understanding of the application's source code. The document describes various white box testing techniques like path testing, statement coverage testing, branch coverage testing, and loop testing. It also covers the advantages of white box testing like checking code standards and optimizing code. The disadvantages include it requiring highly skilled testing and having a high complexity and cost.

1. WHITE BOX
TESTING
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2. CONTENTS
 What is white box testing?
 White box testing techniques
 Path testing
 Statement coverage testing
 Branch coverage testing
 Loop testing
 Advantages of white box testing
 Disadvantages of white box testing
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3. WHAT IS WHITE BOX
TESTING?
 It is also know as:
 Glass based testing.
 Structural testing.
 White box testing is performed based on the knowledge of how the
system is implemented. It requires access to source code.
 The objective of white box testing is to validate whether code
implementation follows intended design in order to check implemented
security functionality and uncover exploitable vulnerabilities.
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4. WHITE BOX TESTING
TECHNIQUES
Path testing
Statement Coverage Testing
Branch Coverage Testing
Loop Testing
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5. PATH TESTING
 The objective of path testing is to define a set of linear independent
path, called basis set, that can be used to construct any path through
program flow graph.
 A path represents floe of execution from start of a method to its exit.
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6. STATEMENT COVERAGE
TESTING
 Statement coverage testing identifies the statements in the method or class that have
been executed.
 The objective of statement coverage testing is to ensure that every statement in the
program is executed for at least one time.
 𝑆𝑡𝑎𝑡𝑒𝑚𝑒𝑛𝑡 𝑐𝑜𝑣𝑒𝑟𝑎𝑔𝑒 =
𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑛𝑜𝑑𝑒𝑠 𝑐𝑜𝑣𝑒𝑟𝑒𝑑
𝑇𝑜𝑡𝑎𝑙 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑛𝑜𝑑𝑒𝑠
∗100
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7. BRANCH COVERAGE
TESTING
 A branch is the outcome of a decision, and branch coverage simply identifies the
decision outcomes that have been tested.
 Branch coverage takes in depth view of the source code that simple statement
coverage.
 Branch coverage aims to design test cases in such a way that each decision has a
true or false outcome at least once.
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8. LOOP TESTING
 Loop testing is white box testing technique that focuses on loop constructed.
 There are following types of loops:
Simple loops
Nested loops
Concatenated loops
Unstructured loops
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9. ADVANTAGES OF WHITE
BOX TESTING
 Helps in checking code standards and optimizing code.
 Extra code resulting in hidden defects can be removed.
 Reason of failure can be determined.
 Identifying test data is easy due to the knowledge of internal
implementation.
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10. DISADVANTAGES OF
WHITE BOX TESTING
Testing should be highly skilled.
Cost of performing white box testing is high.
High complexity.
Impossible to look each piece of code to find the bug.
Exhaustive testing is not feasible.
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11. THANK
YOU
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