Gray Box Testing in Software Development

 
Grey Box Testing
 
L12   2020
 
What is Gray Box Testing?
 
Gray Box Testing is a technique to test the
software product or application with partial
knowledge of the internal workings of an
application.
In this process, context specific errors that are
related to web systems are commonly
identified. It will increase the testing coverage
by concentrating on all of the layers of any
complex system.
 
Combination of White-box and Black-box
 
Gray Box Testing is a software testing method,
which is a combination of both 
White Box
Testing
 and Black Box Testing method.
In White Box testing internal structure (code)
is known
In Black Box testing internal structure (code) is
unknown
In Grey Box Testing internal structure (code) is
partially known
 
 
Gray Box Testing gives the ability to test both
sides of an application, presentation layer as
well as the code part. It is primarily useful in
Integration Testing
 and 
Penetration Testing
.
 
Example of Gray Box Testing
 
While testing websites feature like links or
orphan links, if tester encounters any problem
with these links, then he can make the changes
straightaway in HTML code and can check in real
time.
 
Why Gray Box Testing
 
Gray Box Testing is performed for the following reason,
It provides combined benefits of both black box testing
and white box testing both
It combines the input of developers as well as testers
and improves overall product quality
It reduces the overhead of long process of testing
functional and non-functional types
It gives enough free time for developer to fix defects
Testing is done from the user point of view rather than
designer point of view
 
Gray Box Testing Strategy
 
To perform Gray box testing, it is not
necessary that the tester has the access to the
source code. Test are designed based on the
knowledge of algorithm, architectures,
internal states, or other high -level
descriptions of the program behavior.
 
 
To perform Gray box Testing
It applies straight forward technique of black
box testing
It is based on requirement test case
generation, as such it presets all the
conditions before the program is tested by
assertion method.
 
 
Techniques used for Grey box Testing
 
Matrix Testing: 
This testing technique involves defining all
the variables that exist in their programs.
Regression Testing
: To check whether the change in the
previous version has regressed other aspects of the
program in the new version. It will be done by testing
strategies like retest all, retest risky use cases, retest within
firewall.
Orthogonal Array Testing or OAT
: It provides maximum
code coverage with minimum test cases.
Pattern Testing:
 This testing is performed on the historical
data of the previous system defects. Unlike black box
testing, gray box testing digs within the code and
determines why the failure happened
 
 
Usually, Grey box methodology uses automated
software testing tools to conduct the testing.
Stubs and module drivers are created to relieve
tester to manually generate the code.
 
Steps to perform Grey box Testing
 
Step 1
: Identify inputs
Step 2
: Identify outputs
Step 3
: Identify major paths
Step 4
: Identify Subfunctions
Step 5
: Develop inputs for Subfunctions
Step 6
: Develop outputs for Subfunctions
Step 7
: Execute test case for Subfunctions
Step 8
: Verify correct result for Subfunctions
Step 9
: Repeat steps 4 & 8 for other Subfunctions
Step 10
: Repeat steps 7 & 8 for other Subfunctions
 
 
The test cases for grey box testing may include,
GUI related, Security related, Database related,
Browser related, Operational system related,
etc.
 
Gray Box Testing Challenges
 
When a component under test encounter a
failure of some kind may lead to abortion of
the ongoing operation
When test executes in full but the content of
the result is incorrect.
 
Summary
 
The overall cost of system defects can be reduced
and prevent from passing further with Grey box
testing
Grey box testing is suited more for GUI,
Functional Testing, security assessment, web
applications, web-services, etc.
Techniques used for Grey box Testing
Matrix Testing
Regression Testing
OAT or Orthogonal Array Testing
Pattern Testing
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Gray Box Testing is a software testing technique that involves testing the software with partial knowledge of its internal workings. It combines aspects of White Box Testing and Black Box Testing, allowing testers to check both the presentation layer and the code part of an application. Gray Box Testing provides benefits such as improved product quality, reduced testing overhead, and a user-centric testing approach. Testers do not require access to the source code to perform Gray Box Testing; tests are designed based on knowledge of the program's behavior. This testing method is especially useful for Integration Testing and Penetration Testing, enabling the identification of context-specific errors in web systems.


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  1. Grey Box Testing L12 2020

  2. What is Gray Box Testing? Gray Box Testing is a technique to test the software product or application with partial knowledge of the internal workings of an application. In this process, context specific errors that are related to web systems are commonly identified. It will increase the testing coverage by concentrating on all of the layers of any complex system.

  3. Combination of White-box and Black-box Gray Box Testing is a software testing method, which is a combination of both White Box Testing and Black Box Testing method. In White Box testing internal structure (code) is known In Black Box testing internal structure (code) is unknown In Grey Box Testing internal structure (code) is partially known

  4. Gray Box Testing gives the ability to test both sides of an application, presentation layer as well as the code part. It is primarily useful in Integration Testing and Penetration Testing.

  5. Example of Gray Box Testing While testing websites feature like links or orphan links, if tester encounters any problem with these links, then he can make the changes straightaway in HTML code and can check in real time.

  6. Why Gray Box Testing Gray Box Testing is performed for the following reason, It provides combined benefits of both black box testing and white box testing both It combines the input of developers as well as testers and improves overall product quality It reduces the overhead of long process of testing functional and non-functional types It gives enough free time for developer to fix defects Testing is done from the user point of view rather than designer point of view

  7. Gray Box Testing Strategy To perform Gray box testing, it is not necessary that the tester has the access to the source code. Test are designed based on the knowledge of algorithm, architectures, internal states, or other high -level descriptions of the program behavior.

  8. To perform Gray box Testing It applies straight forward technique of black box testing It is based on requirement test case generation, as such it presets all the conditions before the program is tested by assertion method.

  9. Techniques used for Grey box Testing Matrix Testing: This testing technique involves defining all the variables that exist in their programs. Regression Testing: To check whether the change in the previous version has regressed other aspects of the program in the new version. It will be done by testing strategies like retest all, retest risky use cases, retest within firewall. Orthogonal Array Testing or OAT: It provides maximum code coverage with minimum test cases. Pattern Testing: This testing is performed on the historical data of the previous system defects. Unlike black box testing, gray box testing digs within the code and determines why the failure happened

  10. Usually, Grey box methodology uses automated software testing tools to conduct the testing. Stubs and module drivers are created to relieve tester to manually generate the code.

  11. Steps to perform Grey box Testing Step 1: Identify inputs Step 2: Identify outputs Step 3: Identify major paths Step 4: Identify Subfunctions Step 5: Develop inputs for Subfunctions Step 6: Develop outputs for Subfunctions Step 7: Execute test case for Subfunctions Step 8: Verify correct result for Subfunctions Step 9: Repeat steps 4 & 8 for other Subfunctions Step 10: Repeat steps 7 & 8 for other Subfunctions

  12. The test cases for grey box testing may include, GUI related, Security related, Database related, Browser related, Operational system related, etc.

  13. Gray Box Testing Challenges When a component under test encounter a failure of some kind may lead to abortion of the ongoing operation When test executes in full but the content of the result is incorrect.

  14. Summary The overall cost of system defects can be reduced and prevent from passing further with Grey box testing Grey box testing is suited more for GUI, Functional Testing, security assessment, web applications, web-services, etc. Techniques used for Grey box Testing Matrix Testing Regression Testing OAT or Orthogonal Array Testing Pattern Testing

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