Unit Testing
The process of testing the individual units of software is called Unit Testing. It will be done during the development of a software application. According to the programming procedure, a unit may be an individual function of the software.
Unit Testing is one of the levels of software testing and usually done by the developer. It is the first level of testing. Developers or QA Engineers will handle this testing.
Working Process of Unit Testing
With the help of this testing, we can fix bugs or errors during the development cycle
It enables developers to make changes quickly and saves cost
It helps to get a good quality software product
Unit Testing Types
It is of two types namely Manual or Automated.
Most probably performed by manually but developers always prefer to do automation testing. It is a white box testing technique comes under following test coverage techniques
Branch Coverage
Condition Coverage
Decision Coverage
Statement Coverage
Using White box testing methods
Test cases can be derived that all independent paths within a module have been exercised at least once.
Exercise all logical decisions on their true and false sides.
Executes all loops at their boundaries.
Exercise internal data structures to assure their validity.
Unit Testing Tools
JTest
JUnit
NUnit
JMockit
EMMA
PHPUnit
xUnit.net
TestNG
QuiltHTTP
HTMLUnit
EmbUnit
SimpleTest
ABAPUnit
TypeMock
LRDA
Cantata
Karma
Jasmine
Mocha
Parasoft
Advantages
Developers will be able to understand the functionality of the Unit API
It helps the developers to rewrite and modify the code anytime and ensure the unit works as usual
It helps to test each and every unit of the software application so that named as Unit Testing
Disadvantages
It is very complicated to test each and every unit in large scale programs as it takes a lot of time
There may be a chance of missing units or paths of code in trivial programs
It allows testing only certain units or paths of code so that we are unable to grab the integration errors
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