Software Testing

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Agenda
Introduction
Importance of testing in SDLC
Testing life cycle
Test planning
Types of testing
Verification & Validation
Quality Assurance & Control
Bug reporting

Software testing is a process used to
identify the correctness, completeness
and quality of developed computer
software.
It is the process of executing a
program / application under positive
and negative conditions by manual or
automated means. It checks for the :-
 Specification
 Functionality
 Performance
Software Testing

Software Testing is important as it may
cause mission failure, impact on operational
performance and reliability if not done
properly.
Effective software testing delivers quality
software products satisfying user’s
requirements, needs and expectations.
Why Software Testing

What …????
…is an ”ERROR”??
….is a ”Bug”??
….is Fault, Failure ??

Bug, Fault & Failure
Error : An error is a human action that produces the
incorrect result that results in a fault.
Bug : The presence of error at the time of execution of the
software.
Fault : State of software caused by an error.
Failure : Deviation of the software from its expected result.
It is an event.
A person makes an Error
That creates a fault in software
That can cause a failure in operation

Who is a Software
Tester??..
Software Tester is the one who
performs testing and find bugs, if they
exist in the tested application.

The Testing Team
 Program Manager-
• The planning and execution of the project to ensure the
success
of a project minimizing risk throughout the lifetime of
the project.
• Responsible for writing the product specification,
managing the schedule and making the critical decisions
and trade-offs.
 QA Lead-
• Coach and mentor other team members to help
improve QA effectiveness
• Work with other department representatives to
collaborate on
joint projects and initiatives
• Implement industry best practices related to testing
automation and to streamline the QA Department.

Test AnalystLead-
• Responsible for planning, developing and executing
automated test
systems, manual test plans and regressions test plans.
• Identifying the Target Test Items to be evaluated by the
test effort
• Defining the appropriate tests required and any
associated Test
Data
• Gathering and managing the Test Data
• Evaluating the outcome of each test cycle
Test Engineer-
• Writing and executing test cases and Reporting defects
• Test engineers are also responsible for determining the
best way a
test can be performed in order to achieve 100% test
coverage of all
components

When to Start
Testing in SDLC
Requirement
Analysis
Design
Coding
Testing
Implementation
Maintenance
Testing starts from Requirement
Phase

Project Initiation
System Study
Summary Reports
Analysis
Regression Test
Report Defects
Execute Test Cases
( manual /automated )
Design Test Cases
Test Plan
Testing Life Cycle

Test Plan
A test plan is a systematic approach to testing a
system i.e. software. The plan typically contains a
detailed understanding of what the eventual testing
workflow will be.

Test Case
A test case is a specific procedure of testing a
particular requirement.
It will include:
Identification of specific requirement tested
Test case success/failure criteria
Specific steps to execute test
Test Data

Unit Testing
1.1. Test each module individually.
2. Follows a white box testing (Logic of
the program)
3. Done by Developers

Integration Testing
After completing the unit testing and
dependent modules development, programmers
connect the modules with respect to HLD for
Integration Testing through below approaches.

System Testing
After completing Unit and Integration
testing through white box testing
techniques development team release
an .exe build (all integrated module) to
perform black box testing.
 Usability Testing
 Functional Testing
 Performance Testing
 Security Testing

Usability Testing
During this test, testing team concentrates on the
user friendliness of build interface. It consists of
following sub tests.
User Interface Test: Ease of use (screens should
be understandable to operate by End User)
Look & Feel :- attractive
Speed in interface :- Less number of task to
complete task
Manual Support Test :- Context sensitiveness of
user manual.

Functional
Testing
The process of checking the behavior of the
application.
It is geared to functional requirements of an
application.
To check the correctness of outputs.
Data validation and Integration i.e. inputs are
correct or not.

Performance Testing
 LOAD TESTING – Also Known as Scalability
Testing. During this test, test engineers execute
application build under customer expected
configuration and load to estimate performance.
 STRESS TESTING – During this test, Test
engineers estimates the peak load. To find out the
maximum number of users for execution of out
application user customer expected configuration to
estimate peak load.
PEAK LOAD > CUSTOMER LOAD
(EXPECTED)
 DATA VOLUME TESING -- Testing team
conducts this test to find the maximum limit of data
volume of your application.

Security Testing
Testing how well the system protects against
unauthorized internal or external access,
willful damage, etc, may require sophisticated
testing techniques

Smoke testing is non-exhaustive software
testing, ascertaining that the most crucial
functions of a program work, but not
bothering with finer details.
Smoke testing

Alpha Testing
1. The application is tested by the users who
doesn’t know about the application.
2. Done at developer’s site under controlled
conditions
3. Under the supervision of the developers.

Acceptance
Testing
A formal test conducted to determine whether
or not a system satisfies its acceptance criteria
and to enable the customer to determine
whether or not to accept the system.
It is the final test action before deploying the
software. The goal of acceptance testing is to
verify that the software is ready and can be
used by the end user to perform the functions
for which the software was built.

Beta Testing
1. This Testing is done before the final release of the
software to end-users.
2. Before the final release of the software is released
to users for testing where there will be no controlled
conditions and the user here is free enough to do
what ever he wants to do on the system to find
errors.

Regression Testing
Testing with the intent of determining if bug fixes
have been successful and have not created any new
problems. Also, this type of testing is done to ensure
that no degradation of baseline functionality has
occurred.

Monkey Testing
Testing the application randomly like hitting keys
irregularly and try to breakdown the system there is no
specific test cases and scenarios for monkey testing.

Verification
 Verification is the process
confirming that -software
meets its specification, done
through inspections and
walkthroughs
Use – To identify defects in
the product early in the life
cycle

Validation
 Validation is the process
confirming that it meets the
user’s requirements. It is the
actual testing.
Verification : Is the Product
Right
Validation : Is it the Right
Product

Quality is defined as meeting the customer’s
requirements and according to the standards
The best measure of Quality is given by FURPS
Functionality
Usability
Reliability
Performance
Scalability
What is Quality ?

Quality is the important factor affecting an
organization’s long term performance.
 Quality improves productivity and
competitiveness in any organization.
Why Quality ?

Quality Assurance
Quality Assurance is a planned and systematic set of
activities necessary to provide adequate confidence
that products and services will conform to specified
requirements and meets user needs.
•It is process oriented.
•Defect prevention based.
•Throughout the Life Cycle.
•It’s a management process.

Quality Control
Quality control is the process by which product
quality is compared with the applicable standards
and the action taken when non conformance is
detected.
It is product oriented
Defect detection based

QA vs. QC
Quality Assurance makes
sure that we are doing the
right things, the right Way.
QA focuses on building
in quality and hence
preventing defects.
QA deals with process.
QA is for entire life
cycle.
 QA is preventive
process.
Quality Control makes
sure the results of what
we’ve done are what we
expected .
QC focuses on testing
for quality and hence
detecting defects.
QC deals with product.
QC is for testing part in
SDLC.
QC is corrective
process.

Bug Life Cycle
New
Assigned
Tester finds the bug
nd report it to Test Lead
Test Lead confirms
that it is a valid BugBug
Resolved
Re-open Verified
Closed
Deferred

Cost
Amount of Testing
No.ofBugs
Cost incurred
Bugs ratio
Stop Testing
When to Stop
Testing

Software Testing

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