Testing methodology

Outlines
Software testing is the
evaluation of a software
that is being developed,
to check its capability and
ability to deliver the
intended results.!
Introduction
Testing Process
Testing Methodology
RegressionTesting

Introduction
 At First Stage ---Testing is the process of executing a program
with the intent of finding errors
 At last Stage ---Testing is the process of demonstrating that
errors are not present (after the completion of all bugs)
 When you test a program, you want to add some value to it.
Adding value through testing means raising the quality or
reliability of the program. Raising the reliability of the program
means finding and removing errors.
 Therefore, don’t test a program to show that it works; rather, you
should start with the assumption that the program contains errors
and then test the program to find as many of the errors as
possible.

Why Testing?
 To find and correct defects.
 To check whether the User’s needs are satisfied.
 To avoid user detecting problems.
 Also to provide Quality Product.

Why does S/W have bugs?
 Miscommunication or No Communication
(That we are not clear about what an application should do or shouldn’t do)
 Time Pressure
 Programming Mistakes
 Changing Requirements

Misunderstandings about Testing
 Testing is debugging
 Testing is not the job of a programmer
 If programmers were more careful, testing would be
unnecessary.
 Testing activities start only after the coding is complete
 Testing never ends
 Testing is not a creative task

Testing Process
We can divide the
activities within the test
process into the following
basic steps:
Test Planning
Test Analysis and
Design
Test Execution
Test Evaluating
and Reporting

Testing Process
Test Evaluating
-Analyze root
Causes of
defects
-Identify actions
-WriteTest
Report
Test Execution
Perform
testing
Bug Fixing
BugTracking
(Re-test)
Test
Log
Test Analysis & Design
SRS study
CreateTest
Design
Review &
Approval
- Develop test
cases, test
scripts
- Prepare test
data
Test Planning
-Test Objective
-Test Schedule
-Resource Allocation
-Test Exit Criteria

Test Planning
Test Planning has following major tasks:
 To determine the scope and risks and
identify the objectives of testing.
 To determine the required test resources like people, test
environments, PCs, etc.
 To schedule test analysis and design tasks, test execution
and evaluation.
 To determine the Exit criteria.

Test Analysis & Design
Test Analysis and Design has following major tasks:
 To review the SRS (Software Requirement Specification)
to understand what the system should do.
 To identify test conditions and requirements
 To design Test Cases (success/failure criteria).
 To design the test environment set-up and
identify and required infrastructure and tools.
 To prepare the test data.

Test Execution
Test Execution has following major tasks:
 To execute test following the Test Methodology.
 To re-execute the tests that previously failed in order to confirm
a fix.This is known as confirmation testing or re-testing.
 To log the outcome of the test execution and versions of the
software under tests. (Test Log)
 To Compare actual results with expected results.

TestEvaluatingandReporting
This step has the following major tasks:
 To check the test logs against the exit criteria specified in
test planning.
 To analyze root causes of defects and Identify necessary
actions.
 To write aTest Report.

WhatareSoftwareTestingMethodologies?
Software testing methodologies are the different
approaches and ways of ensuring that a software
application is fully tested.
Software testing methodologies encompass in two parts:

FunctionalTesting
The functional testing part of
a testing methodology is
typically broken down into
four components - unit
testing, integration testing,
system testing and
acceptance testing – usually
executed in this order.
AcceptanceTesting
SystemTesting
IntegrationTesting
Unit Testing

UnitTesting
 Purpose: To verify that the component/module
functions work properly.
 Check:
 internal data structures
 Logic
 boundary conditions for input/output data
 Method:White box testing
 Done by: Developers

IntegrationTesting
 Purpose:To verify that modules/components witch have
been successfully unit tested when integrated together
to perform specific tasks and activities work properly.
 This testing is usually done with a combination
of automated functional tests and manual testing
 Method: Black box testing
 Done by: IndependentTestTeam

SystemTesting
 Purpose:Verifies that all system elements work properly
and that overall system function and performance has
been achieved.
 This test is carried out by interfacing the hardware and
software components of the entire system (that have
been previously unit tested and integration tested), and
then testing it as a whole.
 Done by: IndependentTestTeam

AcceptanceTesting
 Purpose:To ensure that the software that has been developed
operates as expected and meets all user requirements.
 There are two types of acceptance testing:
 AlphaTesting: It is carried out by the members of the
development team, known as internal acceptance testing.
 BetaTesting: It is carried out by the customer, known as
external acceptance testing.

Enhancements
& Fixes Regression
Testing
WhatisRegression Testing?
Regression testing is type of testing carried out to ensure that changes
made in the fixes or any enhancement changes are not impacting the
previously working functionality.
RegressionTesting is required when there is a
 Change in requirements and code is modified according to the new
requirement.
 New feature is added to the software
 Defect fixing
 Performance issue fix

UnitTestingLevel(Semantic)
Area to focus during Unit level:
 Test cases which have frequent defects.
 Functionalities which are more visible to
the users.
 Test cases which verify core features of
the product.
 Test cases of Functionalities which has
undergone more and recent changes.
 Sample of Successful test cases.
 Sample of Failure test cases.
Testing Environment: Developer Interface
Build tests
for version x
Test
data
Run tests
for version x
Build results
for version x
Compare Verdict

IntegrationTestingLevel(Semantic)
Should to testing Module:
M8, M5, M1, and Main at the Unit level
Re-integration:
1, 2, 3 at the Integration level
Testing Environment : Developer Interface
Changed Module
MainA
M1 M3M2
M7M6M5M4
M8
1
2
3

SystemTestingLevel(Semantic)
Changed Module
MainA
M1
M5
M8
1
2
3
SystemA System B
Main B
Should to testing Module:
Main A and Main B at the System level
Testing Environment : Developer Interface
4

RegressionProcessinDeveloperInterface(Syntax)
UnitTesting Level
IntegrationTesting Level
AcceptanceTesting Level

AcceptanceTestingLevel(Semantic)
Once the user have a regression test (in Acceptance level), it is important to
update it each time (Redevelop) ...
• Fix a bug
• Add, change or remove functionality
• Change platform
Testing Environment : Testing Interface
(PATSTCMD Machine)

ReleaseStep(Syntax)
 Once the user finish
regression testing in
Testing Interface, product
can be Release to
Production
 Finally, product can be
send to LIVE

Finally
Have a good interaction, Understand the tasks,
Close the bugs, And at last give the quality
product, It makes us to reach what we have
aimed and also it will reach our company to the
top level.

Testing methodology

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