bodom_lx at task3 dot cc

Elements and Concepts – A brief overview

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Download PDF version of the whole document. You can browse the article online but I encourage the download of the PDF since it is written with accuracy.

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Introduction

This document contains some basic concepts and definitions about software testing. It has been written for studying a part of the Software Engineering Project course at my University. It is composed by a summary of the intersection of more than 10 different sources, all of which are cited. If you feel that some contents of this publication belong to your intellectual property and it is not cited, please contact the author who is willing to correct any mistake.

The first part of the paper focuses on the definition of the most important key aspects of software testing. Then some information about input partitioning are given. What follows is a research about code coverage and two useful and famous tools, Control-flow coverage and Data-flow analysis. A complete example on using those tools is then given. The second half of the document also contains the definition of the most important software testing practices.

The goal of this tiny document is to clarify key terms and therefore become a base start for the reader to go in deep with the interested topics. Another goal is to give a simple but clear example about data flow analysis, as I realized that not all the people understand the examples around the Net.

Software Testing

Software Testing is an empirical investigation conducted to provide stakeholders with information about the quality of the product or service under test, with respect to the context in which it is intended to operate. Software Testing also provides an objective, independent view of the software to allow the business to appreciate and understand the risks at implementation of the software. Test techniques include, but are not limited to, the process of executing a program or application with the intent of finding software bugs. It can also be stated as the process of validating and verifying that a software program/application/product meets the business and technical requirements that guided its design and development, so that it works as expected and can be implemented with the same characteristics. ¹

Read more…

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As I promised about 4 hours ago, here is my introduction to Hyper Text Transfer Protocol in form of a mind map.
It is to be intended as a really short introduction to this protocol. Like the previous one about computer networks, the mindmap summarizes materials copyrighted by Tanenbaum and also material taken from Wikipedia.

The topics covered are:

• Scope of the protocol
• HTTP connection
  • HTTP/1.0
  • HTTP/1.1
• HTTP request methods:
  • GET
  • HEAD
  • PUT
  • POST
  • DELETE
  • TRACE
  • CONNECT
  • OPTIONS
• Message Headers
  • Request Headers – all
  • Response Headers – all
• Status Codes:
  • 1xx Information
  • 2xx Success
  • 3xx Redirection
  • 4xx Client error
  • 5xx Server Error
• Sessions:
  • Cookies
  • Server-Side sessions
• Secure HTTP – HTTPS:
  • By URI scheme
  • HTTP Upgrade Header
  • SSL/TLS

You can browse an HTML version online.

You can download:

• Mindmap source file (Freemind)
• An export in PDF format
• An export in PNG format

As always, you are free and encouraged to contact me in case of errors or anything else.
Hope you like it!

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If you’re trying the new Gnome’s Empathy chat system with Fedora 10, remember that to make it working for MSN accounts you also have to install those packages:

yum install telepathy-butterfly.noarch telepathy-haze.i386 libtelepathy.i386

This will bring the “Connection Error” message away

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It’s a very long time since I abandoned Ubuntu, 1 year and 9 months being precise, although I continued to use Ubuntu derived distros.
I decided today to give Ubuntu 8.10 beta a try. Obviously, every time I decide to try a Gnu/Linux distribution it happens that a new release comes out: I downloaded Alpha 6 yesterday, I fell into problems with it and a apt-get update && apt-get dist-upgrade brought me Ubuntu 8.10 beta, correcting some of them
Read more…

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VERSIONE IN ITALIANO
Dear Msn buddy, I’m going to change account.
For technical and political reasons I won’t continue to either use Microsoft Window Live Messenger or its protocol MSN Messenger.
I’m going to use Jabber/XMPP.
I would like to keep in touch with you and my other 200 contacts, so I decided to Read more…

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You can find your favourite linux distribution at linode.com, a great hosting service where I’m transferring my blog and all other services I need. They offer great cheap VPS solutions, and you can choose Archlinux from the available linux distributions.
Archlinux is currently in testing: for example, ssh will not work after a fresh install. Here I’m going to explain how to fix this and how to access your VPS.

After the installation of Archlinux, if you try to connect to ssh, you will receive this error:

ssh yourUsername@yourIP
ssh: connect to host yourIP port 22: Connection refused

That’s because Archlinux does not install the openssh server by default. Let’s install it!
Linode offers a workaround to connect to your machines, called Lish, the LInode SHell. From this shell, you will be able then to connect to your machines.

ssh yourLinodeUsername@yourLinodeHost.linode.com

Where yourLinodeUsername is the username you chose for Linode registration, and yourLinodeHost is the host address of the machine (you can see it in this page, after a login: https://www.linode.com/members/remote.cfm, it’s in the form hostNUMBER).

You will be then prompted to Archlinux console. Use your root access and install ssh:

pacman -Sy
pacman -S openssh

Add sshd to your deamons array in /etc/rc.conf

DAEMONS=(… sshd …)

If you try to connect to your account via ssh, you will get another error at this time, because you need to allow external internet connections to the ssh daemon.
Your /etc/hosts.allow should look like this:

sshd: ALL

Start opensshd (/etc/rc.d/sshd start) or reboot the machine, you’re finished!

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