Software testing sengu

SOFTWARE TESTING
Testing is the process of executing a program with the
intention of finding errors.
Software testing is an analysis that gives us data to
estimate the quality of a system
This Includes, but not limited to the process of executing
program or application with the intent of finding software
bugs.

What is Testing?
 Testing is the process of evaluating a system or its component(s) with the
intent to find that whether it satisfies the specified requirements or not. This
activity results in the actual, expected and difference between their results. In
simple words testing is executing a system in order to identify any gaps, errors
or missing requirements in contrary to the actual desire or requirements.
 According to ANSI/IEEE 1059 standard, Testing can be defined as “A process of
analyzing a software item to detect the differences between existing and
required conditions (that is defects/errors/bugs) and to evaluate the features
of the software item”.

Who does Testing?
 It depends on the process and the associated stakeholders of the
project(s). In the IT industry, large companies have a team with
responsibilities to evaluate the developed software in the context of the
given requirements. Moreover, developers also conduct testing which is
called Unit Testing. In most cases, following professionals are involved
in testing of a system within their respective capacities:
 Software Tester
 Software Developer
 Project Lead/Manager
 End User

Diff between V&V
Verification Validation
Are you building it right? Are you building the right thing?
Ensure that the software system meets
all the functionality.
Ensure that functionalities meet the
intended behavior.
Verification takes place first and includes
the checking for documentation, code
etc.
Validation occurs after verification and
mainly involves the checking of the
overall product.
Done by developers. Done by Testers.
Have static activities as it includes the
reviews, walkthroughs, and inspections
to verify that software is correct or not.
Have dynamic activities as it includes
executing the software against the
requirements.
It is an objective process and no
subjective decision should be needed to
verify the Software.
It is a subjective process and involves
subjective decisions on how well the
Software works.

QA QC TESTING
Activities which ensure the
implementation of
processes, procedures and
standards in context to
verification of developed
software and intended
requirements.
verification of developed
software with respect to
documented (or not in
some cases) requirements.
identification of
bugs/error/defects in the
Software.
Focuses on processes and
procedures rather then
conducting actual testing
on the system.
Focuses on actual testing
by executing Software with
intend to identify bug/defect
through implementation of
procedures and process.
Focuses on actual testing.
Process oriented activities. Product oriented activities. Product oriented activities.
Preventive activities It is a corrective process. It is a preventive process
It is a subset of Software
Test Life Cycle (STLC)
QC can be considered as
the subset of Quality
Testing is the subset of
Quality Control.
Diff between QA,QC &
TESTING

Diff between Testing &
Debugging
 Testing: It involves the identification of bug/error/defect in
the software without correcting it. Normally professionals
with a Quality Assurance background are involved in the
identification of bugs. Testing is performed in the testing
phase.
 Debugging: It involves identifying, isolating and fixing the
problems/bug. Developers who code the software conduct
debugging upon encountering an error in the code.
Debugging is the part of White box or Unit Testing.
Debugging can be performed in the development phase
while conducting Unit Testing or in phases while fixing the
reported bugs.

Testing Types
Manual Testing
 This type includes the testing of the Software manually i.e. without using
any automated tool or any script. In this type the tester takes over the
role of an end user and test the Software to identify any un-expected
behavior or bug. There are different stages for manual testing like unit
testing, Integration testing, System testing and User Acceptance testing.
 Testers use test plan, test cases or test scenarios to test the Software to
ensure the completeness of testing. Manual testing also includes
exploratory testing as testers explore the software to identify errors in it.

Testing Types
Automation Testing
 Automation testing which is also known as “Test Automation”, is when
the tester writes scripts and uses another software to test the software.
This process involves automation of a manual process. Automation
Testing is used to re-run the test scenarios that were performed
manually, quickly and repeatedly.
 Apart from regression testing, Automation testing is also used to test
the application from load, performance and stress point of view. It
increases the test coverage; improve accuracy, saves time and money
in comparison to manual testing.

Testing Methods
S.no Black Box Testing Gray Box Testing White Box Testing
1 The Internal Workings of an
application are not required
to be known
Somewhat knowledge of
the internal workings are
known
Tester has full
knowledge of the
Internal workings of
the application
2 Also known as closed box
testing, data driven testing
and functional testing
Another term for grey
box testing is translucent
testing as the tester has
limited knowledge of the
insides of the application
Also known as clear
box testing, structural
testing or code
based testing
3 Performed by end users
and also by testers and
developers
Performed by end users
and also by testers and
developers
Normally done by
testers and
developers
4 Testing is based on external
expectations -Internal
Testing is done on the
basis of high level
Internal workings are
fully known and the

Introduction to SDLC
What is SDLC?
The software development life cycle (SDLC) is the
entire process of formal, logical steps taken to develop a
software product.
Levels of SDLC
Requirements Gathering
Systems Design
Code Generation
Testing
Maintenance

Waterfall Model
Waterfall Model
 The waterfall model derives its name due to the cascading effect
from one phase to the other as is illustrated in Figure. In this model
each phase well defined starting and ending point, with identifiable
deliveries to the next phase.

Prototyping Model
Prototyping Model
 The Prototyping Model is a systems development method (SDM) in
which a prototype (an early approximation of a final system or
product) is built, tested, and then reworked as necessary until an
acceptable prototype is finally achieved from which the complete
system or product can now be developed.

Incremental Model
 This model combines the elements of the waterfall model with the
iterative philosophy of prototyping. However, unlike prototyping the
IM focuses on the delivery of an operational product at the end of
each increment.

Spiral Model
 The spiral model is a software development model combining
elements of both design and prototyping-in-stages, in an effort to
combine advantages of top-down and bottom-up concepts.

Agile Model
 Agile software development is a group of software development
methods based on iterative and incremental development, where
requirements and solutions evolve through collaboration between self-
organizing, cross-functional teams.

Levels of Testing
 Functional Testing.
 Non- functional Testing.

Functional Testing
 This is a type of black box testing that is based on the specifications of the
software that is to be tested. The application is tested by providing input
and then the results are examined that need to conform to the functionality
it was intended for. Functional Testing of the software is conducted on a
complete, integrated system to evaluate the system's compliance with its
specified requirements. There are five steps that are involved when testing
an application for functionality.
 Step I - The determination of the functionality that the intended
application is meant to perform.
 Step II - The creation of test data based on the specifications of the
application.
 Step III - The output based on the test data and the specifications of
the application.
 Step IV - The writing of Test Scenarios and the execution of test
cases.
 Steps V - The comparison of actual and expected results based on the

Software testing sengu

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