A perspective on web testing.ppt

Business Unit or Product Name
© 2003 IBM CorporationIBM Confidential
A Perspective on Web
Testing
Siva Prasanth Rentala
srentala@in.ibm.com
IGSI-OZONE,Pune,IGSI.

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© 200 ３ IBMIBM Confidential
The purpose of this presentation is to depict a perspective
on Web centric application testing. The document
concentrates only on describing importance of web
testing, how to conduct web testing and automation of
web testing.
The importance of Web Testing is growing phenomenally
as the importance and implementation of Web
applications is taking place in a rapid speed in each and
every company’s applications.
Objective

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The foremost advantage of Web application is it reduces
physical distance between user and the application near
to zero. Web application can be accessed from
anywhere and anytime by anyone around the world.
E-COMMERCE applications like B2B, B2C and market
places are the most promising web application as E-
COMMERCE is yet to be part of life of the entire world
Hence the significance if Web Testing is growing
tremendously. Due to enormous growth in number of
web applications the site needs be not only user friendly
but also reader friendly to attract more users repeatedly.
Web application advantages?

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1. Web Testing is the process of
testing Web centric
applications.
2. Web Testing involves more
dimensions, less time, higher
risks to include tests for
performance, usability and
compatibility than client/server
applications etc. An optimal
Web Testing approach begins
with a thorough risk analysis
of your application to identify
and prioritize key areas and
testing tasks.
What is Web Testing?

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We site deadlines are often far shorter than anyone
would like.
“Web software testing costs time and money.” &
“Web Software testing saves time and money.”
Both of these statements are true. The equation,
however, cannot be completed without the word
“effective”. With effective Web testing, the net result is
always time and money savings. The chart below
illustrates the geometric increase in cost incurred if
testing is not sufficient.
Why web test?

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Software Testing was never easy.
But in Web arena the testing became more complex and
challenging.
Today the users of web applications are not only limited
but also users from all parts of the world.
With Web based applications the world is moved into the
living rooms.
How Web Testing distinguish
traditional Software Testing?

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1. Performance due to concurrent users
2. Compatibility
3. Robustness
4. Continuous testing
5. Security and user authentication
Which distinguishes the web a
applications from Client-server
applications?

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Automated Vs Manual Testing
• The automated testing is becoming more important
and influential in the web application testing.
• While testing the web application
1. load testing,
2. stress testing and
3. performance testing cannot be done efficiently if we
test manually. Manual testing cannot be possible to
test the web site response time when 100 users
access the site concurrently.
• But there is no automated testing tool, which supports
100% web testing. Web testing should be combination
of manual and automated testing.
How to test Web applications?

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Cost of fixing web errors
The relative cost of correcting errors escalates by a factor of two
between consecutive stages of a project.
Design Build Test Rollout Production
x =
x 2x 4x 10x 60x 100-300x

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 Design a test case, then run it.
 If the program fails the test, write a bug report. Start
over after the bug is fixed.
 If the program passes the test, automate it. Run the
test again (either from a script or with the aid of a
capture utility). Capture the screen output at the end
of the test. Save the test case and the output.
 Next time, run the test case and compare its output to
the saved output. If the outputs match, the program
passes the test
Here is the basic paradigm for
GUI-based automated testing

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 Defects are caught early in the development cycle
before they become costly.
 Time can be spent extending test coverage rather
than repeating manual tests.
 The skill level required to run tests is reduced.
 Fixes are easier to verify because the scenarios that
created them are automated.
 Full regression testing can be performed on each
target platform.
 Metrics can be automatically gathered.
Advantage of automated testing

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Following diagram explains the
automated web testing process.

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User Interface testing includes verifying the Web user
Interface with respect to UI specifications.The
testing should verify that the UI built is as per UI
specifications.
Following tools are available UI testing
1. Rational Robot
2. QA Partner by Segue Software and
3. Xrunner and WinRunner by Mercury Interactive.
User Interface testing

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The functionality test should make sure that the application
behaves as per design specifications dead link testing,
Navigation, HTML validation Spell check and Content
1. Rational Suite TestStudio (Functionality testing)
2. Xenu Link Sleuth software (For Link testing)
3. http://www.w3c.org (For HTML validation)
4. SilkTest International (Functionality testing)
5. Compuware WebCheck –(Web test tool can check links, site
mapping, orphaned URL's , missing attributes; scans for over
50 types of web site problems)
6. Doctor HTML (Site with online web page checker by Imagiware.
Checks spelling, forms, table structure, form structure, tag usage.
Validates links.)
Functionality

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Compatibility testing is necessary to ensure that the site performs
same and as intended across multiple operating systems and
different browser configurations.
Operation Systems: Windows 95, 98, NT and 2000 and XP and
Mac OS 7.6.1 – 9, UNIX, Linux so on.
Browsers: Web site to be tested from Netscape 3.0 - 6, IE 3.0 -
5.0, AOL 3.0 - 5.0, as well as other browsers for both Windows
and Macintosh platforms.
Following testing tools can be used for Compatibility
1. VeriTest (Compatibility Testing)
Compatibility : minimal OS and
browsers to be tested

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Performance testing
Performance testing of web sites required sophisticated
automating tools due to manual tests couldn’t simulate the
testing conditions like maximum users
There are numerous situations when famous sites like
www.msnbc.com, www cnn.com faced performance
problems apart from their preparedness to meet the
maximum traffic.
Predictable events like and unpredictable events like
1. Olympic games or
2. Football world cup where famous sites are flood with heavy
traffic and the web applications also needs to gear for some
3. Sept 11 2001 attack on WTC in New York. Many sites were
th

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1. For example On 12 February 2002, MSNBC.com,
NBCOlympics.com and Olympics.com handled as many as
260,000 concurrent users.
2. MSNBC and KeyLabs predicted and planned for heavy site
traffic by using RadView WebLOAD application testing and
analysis software. MSNBC normally handles 15 million pages
of information per day but ran at 30 million to 40 million per
day during the first week of the Olympics.
There are numerous situations

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1. Load testing:
The Load testing determines the system performance at
maximum usage levels. The measure of transaction times during
load testing is not as important how far a system can be pushed
until it fails.
2. Stress testing:
Stress testing runs or stresses a web application under heavy
loads for sustained periods Stress testing determines when the
performance of a system degrades over a period of time.
The performance testing
includes following testing

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Security
1. The security is very important psychological factor while
retaining or attracting more users to visit the site. Especially
E-Commerce related applications should be geared for users
to protect the users confidential information like credit card
information, address, contact information and so on.
For additional security and encryption, check to see if the
Secure Sockets Layer (SSL) protocol is being used.
Following tools can be used for security testing:
1. Entrust (Securing the Internet)
2. ActiveTest Secure Check (Security testing service for web
applications)
3. .

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Usability & Error handling testing
1. For a large number of products, it is believed that the usability
becomes the final arbiter of quality. This is true for a large
number of desktop applications that gained market share
through providing a good user experience.
2. Error handling strategy to be tested thoroughly as the end
user should not feel uneasy due to the error message
displayed while browsing the site or submitting a web form if
any error occurs. The error message and the way message
displayed should be user friendly.
3. The error message should be meaningful and appropriate

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Network testing
Tests need to be run to ensure that a site is network able and can
run on several network OS environments. Also stress tests is
needed to ensure that a minimum number of users can use an
application at one time

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White box testing Vs Black box
testing
The manual testing can be done in following well-known software
testing techniques. Manual testing can be done wherever web test
automation is not possible or feasible.
1. White box testing :Use White box testing to test the site's
construction. White box testing in software development
involves exercising all possible paths.
2. Black Box testing : Black box testing can be used to test the
site's functionality. Black box testing helps ensure that a
program performs the way it was expected to function. In
dynamic Web sites, the states of pages are constantly
changing depending on how user visits a site.

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Analysis of web testing results
Many of the automated web tools provide test results in different
forms of presentations. The analysis of these results is very
important in improving the web site performance by understanding
the areas of improvement. There are lots of options available to
improve the performance if problem domain area is identified.
Hence the web test result analysis is foremost important activity to
improve the web site popularity.

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Tips for Web testing
1. The figures below represent total page size, including both
text and graphics:
2. The 0-10K range qualifies as exemplary
3. Pages between 10-20K rate as well-optimized
4. The 20-40K range is merely adequate
5. 40-60K pages earn a dubious designator
6. Anything over 60K is unacceptable

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What should be the optimal
Download time?
1. Download Time = 0.1 Second-When a Website operates as
quickly as this, it appears to happen instantly to the user..
2. Download Time = 1 Second-If the site operates this quickly,
the user won't have a chance to focus their attention
somewhere else.
3. Download Time = <15 Seconds-This amount of time is
accepted to be the threshold for keeping the user's attention
focused.
4. Download Time - >15 Seconds -Over 15 seconds is
considered to be too long to keep the user's attention
focused, and they're likely to lose interest and do other things.

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Web testing checklist
Following checklist is useful for web testing
.A perspective on Web TestingWeb Testing Checklist.doc

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User Testing Techniques
Following checklist is useful for web testing
User Testing Techniques

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Vendors Of Web Testing tools
Following are the list of renowned companies famous in supplying
Web Testing tools.
..A perspective on Web TestingVendors Of Web Testing
tools.doc

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Conclusion
Website testing is a very important part of web site development
and sub sequent maintenance. Whether it be an assessment
completed during development, or the analysis of your impact on
the audience after you've launched the site, testing is vital. It can
save any good Websites from failing to satisfy their visitors.

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References
What should a Test to be automated? By Brain Marick for Quality
week magazine.
WebSite testing by Edward Miller of Software Research inc.

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A perspective on web testing.ppt

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