This is to help students to learn about White Box Testing.

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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