Testing software development

Prepared By: Er. Nawaraj
Bhandari
Office Solution And Development
Chapter:10
Testing Software Development

Software Quality
Software Quality is conformance to:
explicitly stated functional and
performance requirements,
explicitly documented development
standards,
implicit characteristics that are expected of
all professionally developed software.

Software Quality
The Standard Glossary of Software Engineering
Terminology IEEE610.12(Institute of Electrical and
Electronics Engineering) defines software quality as:
 The degree to which a system, component, or
process meets specified requirements i.e.
developer requirements.
 The degree to which a system, component, or
process meets customer or user needs or
expectations.

Why Testing is Needed - 1
 The purpose of software testing is to ensure that
software does exactly what the user needs it to do,
ensuring quality.
 It can be used to check that software is functioning
correctly, reliably, efficiently, securely and is usable.

Why Testing is Needed - 2
 Errors in software as a result of non-testing or
inefficient testing can cost a business money, time
and reputation.
 It must be planned carefully in stages, such as
those in the following diagram:

Stages of Software Testing
User
Requirements
Test Plan &
Design Tests
Run Tests
Compare
expected
results with
actual results
Correct errors
and retest
Document in a
Report

Different Types of Testing
 There are many different types of testing
and we will focus on the following:
 White Box Testing (Alpha Testing)
 Black Box Testing (Beta Testing)
 Gray Box Testing
 Graphical User Interface Testing (GUI)
 Usability Testing
 Acceptance Testing

White Box Testing (Alpha)
 White box testing is a testing technique that takes
into account the internal mechanism of a system.
 Alpha testing is the first phase of testing in
development. The first phase includes unit testing,
component testing, and system testing
 It is also called structural testing and glass box
testing
 White box testing is used for verification.
 Test by in-house software test engineers, or
software QA engineers.

Black Box Testing (Beta)
 In software development, a beta test is the
second phase of software testing in which a
sampling of the intended audience tries the
product out.
 It is concerned with what the software is
supposed to do and not how it works .
 Technical knowledge of the coding of the
software is not required (White Box Testing).
 It is also referred to as Functional Testing.
 Black box testing is often used for validating.

Gray Box Testing
 This is the combination of black box and white box
 Can use during the implementation of API (May be
Google application programming interface or any
third-party API) on particular application
 In gray box testing White box testing applied on
own application while Black box testing applied on
other application (API)

GUI Testing
 Graphical User Interface testing – refers to
testing of all or aspects of graphical user
interfaces.
 It can be difficult to undertake as although
there are guidelines for good GUI design, a
user’s judgement of what they consider to
be good design can be subjective, e.g. the
use of colour, sound, etc.

Usability Testing
 This is undertaken to discover if the software is
appropriate to users and how easy it is for them to
use and learn. Tests can include the following:
 Level of use
 Ease of use
 Navigation of the software
 Meaningful instructions
 Meaningful warnings
 Consistent style, etc.

Acceptance Testing
 Also referred to as UAT testing (User
Acceptance Testing) and EU (End User
Testing).
 It is undertaken by a user/customer to help
them decide whether to accept the software
as it is or whether enhancements or
improvements need to be made.
 It marks the boundary between software
being developed for use to software in use.

Test Plan – 1(Issue Tracker)
 When preparing to test software, a Test Plan needs to
be produced.
 Such plans are very detailed if they are testing whole
systems and parts of systems.
 Our test plan will need the following clear structure that
sets out:
 a description of each test
 the expected results of each test
 the actual results
 whether the test passed or failed (include the date)
 if the test failed, what action needs to be taken
 whether the re-test passed or failed (include the date)

Test
Number
Description Expected
Results
Actual
Results
Test Passed
(Date)
Action
Taken
Test Passed
(Date)
1 A test to ensure
that a cell is
correctly
formatted to
accept data
The currency
amount (2
decimal
places)
should be
displayed in
cell D3
The amount
was
displayed as
a whole
number, no
decimal
places
No (21/04/11) Check the
formatting of
cell D3 and
re-test
Yes
(22/04/11)
Test Plan - 2

Expected Test Results
 These are to be clearly set out in the expected
results section of the Test Plan.

Actual Test Results Compared with
Expected Results
 If the actual test results are different when
compared to the expected test results, these
details need to be recorded on the Test
Plan.
 All the discrepancies must be identified.
 The tests must be re-done and all the
discrepancies rectified before each test can
be passed.

Test Report
 Test report plans need to be very detailed if they
are testing whole systems and parts of systems.
 As a minimum, it should include the following
information:
 the name, version and description of the software
program that is being tested
 the date that the testing is starting
 the date for completion of all testing
 who is undertaking the testing and to who they
report
 a description of the type(s) of testing
 a copy of the Test Plan

Test Documentation Standards
 For details of the IT industry testing
documentation standards, refer to the IEEE
229 Standard for Software Test
Documentation at:
 http://tinyurl.com/6dzhhn

A Testing Checklist
 This should check the following:
 Have all aspects of the software that has
been developed been tested?
 If any tests have failed, have they been
redone and passed?
 Is the Test Plan structured correctly?
 Is the Test Report structured correctly?

References - 1
 Case Studies: Software Testing. (2008). [Available Online]
http://tinyurl.com/3zsonhg
 GUI Testing Checklist. (2011). [Available Online]
http://bazman.tripod.com/checklist.html#Section1
 IEEE 829 Standard for Software Test Documentation.
(2010). [Available Online]
http://tinyurl.com/6dzhhn

References - 2
 QA (2009). Quality Assurance and Software
Testing. [Available Online]
 http://tinyurl.com/4xx8rus
 Testing Geek. (2011). [Available Online]
 http://www.testinggeek.com/

Topic 10 – Testing Software
Development
Any Questions?

Testing software development

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