White box testing involves testing internal coding and infrastructure by executing different lines of code. It is done by developers who have knowledge of the internal structure. Black box testing treats the system as a "black box" and tests it without knowledge of internal structures by validating inputs and outputs. Unit testing validates individual units of source code and is done by developers to ensure each part is correct before integration. Both white box and unit testing can be done earlier and be more thorough than black box testing, but require more skilled testers and knowledge of internal structures. Black box testing can be done by non-technical testers and from an end user perspective.

1. White Box & Black Box
Testing
Presented By:
Nitish Mhaske

2. What is White Box Testing ?
 Testing internal coding and infrastructure
 Identify which line of code is actually executed and which is not,
which may indicate that there is either missing logic or a typo.
 Internal Structure known in addition to i/o & Relationships.
 Often used for verification.
 Done by the Developers.
 Structure-based / Glass-box testing
 Called Because here the testers require knowledge of how the
software is implemented.

3. How to encounter a bug in white box
testing?
 It involves testing a series of predefined inputs against expected outputs ,
so when a specific input does not result in the expected output, you have
encountered a bug

4. Advantage of Whitebox Testing
 Testing can be commenced at an earlier stage.
 One need not wait for the GUI to be available.
 Testing is more thorough, with the possibility of covering most paths.
 The other advantage of white box testing is that it helps in optimizing
the code

5. Disadvantage of Whitebox Testing
 As knowledge of code and internal structure is a prerequisite.
 A skilled tester is needed to carry out this type of testing, which
increases the cost
 Not looking at the code in a runtime environment...

6. What is Blackbox Testing?
 Blackbox Testing is a software testing
method in which the internal structure
of the item being tested is not known
to the tester..
 Blackbox testing is often used for
Validation..
 Black box testing is done by the
professional testing team.
 Type
1. Functional
2. Non Functional
3. Reg Test

7. Advantage of Blackbox Testing
 Tester can be non-technical.
 Tester needs no knowledge of implementation, including specific
programming languages
 Tests will be done from an end user's point of view. Because end user
should accept the system.

8. Disadvantage of Blackbox Testing
 Not all properties of a software product can be tested
 The reason for a failure is not found.
 Only a small number of possible inputs can be tested and many
program paths will be left untested..

9. Unit Testing
 Unit testing is that validate individual unit of source code working
properly…
 Unit is smallest testable part of an application..
 Mostly done by developers of the modules..
 Done after Code compilation

10. Goal of Unit Testing
 To isolate each part of program and show that individual parts are
correct..
 Typically Written & run by s/w developer to ensure design &
behaviour

11. Advantage of Unit Testing
 Reduces the level of bugs in production code..
 Unit Testing inspires confidence..
 Makes easier to change and refactor code.
 Concern with the correctness & Completeness
 Isolate each part
 Check conditional logic
 Check for wiring bugs

12. Disadvantage of Unit Testing
 Unit-testing will not catch every error in the program.
 It only tests the functionality of the units….

13. Thank You…