Page 199 - DCAP405_SOFTWARE_ENGINEERING

Software Engineering

Notes Compliance Acceptance Testing
Alpha Testing
Beta Testing
Often when validation testing interview questions are asked, they revolve around the different
types of validation testing. The difference between verification and validation is also a common
software validation testing question. Some organizations may use different terms for some of
the terms given in the article above. As far as possible, we have tried to accept the alternate
names as well.

11.7.2 Testing Strategies for Object Oriented Software

In testing object oriented software, the objective of testing remains the same. The nature of
object oriented software changes both testing strategy and testing tactics.

Unit Testing in Object Oriented Context

In object oriented software, an encapsulated class is the focus of unit testing. Encapsulation
means that class and class object packages the attributes and operations that manipulate the data.
A class contains many operations so unit testing these operations must also vary.
Class testing for object oriented software is analogous to module testing for conventional
software. It is not advisable to test operations in isolation. Unit testing of conventional software
focus on algorithmic detail of module and the data that flows across module whereas unit
testing for object oriented software focus on operations encapsulated by class.

Integration Testing in Object Oriented Context

An important strategy for integration testing of object oriented software is thread based testing.
Threads are set of classes that respond to an input or event. Each thread is integrated and tested
individually. Regression testing is done.
Another strategy is the use based tests that focus on classes that do not collaborate heavily with
other classes.

The behavior of drivers and stubs also changes during integration testing of object oriented
software. Drivers test operations at lowest level and for testing whole group of classes.

What are the uses of stubs?
Did u know?

Stubs are used where collaboration between classes is required but one or more
collaborating class is not fully implemented.

Self Assessment

Fill in the blanks:
1. ……………………….. analysis or profiling tools that can help to highlight hot spots and
resource usage.
2. ………………………. for object oriented software is analogous to module testing for
conventional software.

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