Programming :: Do Not Miss Any Cases While Making The Test Case Doc?
Jul 28, 2010
Few months back I learnt a *few* concepts about bits/bytes and started writing a program for bit packing in C++. Now that program has grown upto 600 lines and I am still working on it. Yesterday I realized I missed some special cases due to which the program was malfunctioning. Now I have modified the program and it is working properly but I think If I would have designed all the possible test cases before writing the code, I would have finished the program long ago.
I. What is proper way to design the test cases before coding?
II. How should I make sure that I do not miss any cases while making the test case doc. ?
III. Does writing test cases prior to coding solve messy code issues or should I consider something else ?
I was windering, if you are writing a C program, I don't think you are supposed to commit the .o files and executables. How can you test your program without making a copy outside the git working dir?
An arbitrary matrix can be solved using Gauss-Jordan elimination with O(n^3) complexity. A tridiagonal matrix (i.e. a special type of matrix) can be solved using Gauss-Jordan with O(n) complexity. That is, a for an arbitrary matrix, Gauss-Jordan is a cumbersome algorithm, but for a tridiagonal matrix, the algorithm can be expressed as a loop and a simple formula. If I were writing, for example, a compiler or some optimization program, is there a way to test the problem to see if it has become less complex, so I can express the algorithm more simply?
I do 'mkisofs -iso-level 1 -o image John Smith.txt'. Only an example. When I mount image, ls outputs john_smi.txt. So it has shorten to 8.3 and translated ' ' into '_'. This is in accordance with the manual, although it doesn't say the conversion will be done.
Quote:
-iso-level level ......................... With all iso9660 levels from 1..3, all filenames are restricted to upper case letters, numbers and the underscore (_). ...........................
However, as it did not reject the file name, it should have converted it to all upper case, it seems to me. And -iso-level 2|3 does the same thing.
Code:
root@darkstar:~# mkisofs -iso-level 1 -o image John Smith.txt Total translation table size: 0 Total rockridge attributes bytes: 0 Total directory bytes: 0
As you know that GNU-C provides qsort() function in <cstdlib> in this prototype
Code:
You may know about Selection Sort Algorithm already, I want to write a function to perform Selection Sort but it can apply generally for many type: int, long, float, double... like qsort() above.
the following works and BASH doesn't complain, but VIM highlights the closing square bracket is if it sees a syntax error. Is there a better way to express regex in a case statement or is this an issue with VIM?
I'm having this problem with this piece of code, and i don't really get what the problem is, maybe is because i am already too sleepy to concentrate enough but maybe
I want to display 4 options using the case command and refresh the screen when options 1 and 2 are chosen (no changes to the options and you get asked again to chose option), but give a message for option 3 and exit on option 4. I set this up with the script below, but choosing option 1 works and choosing option 2 exits the script.
I am working with a third party that use windows to compile. When we port that code I am running into a lot of case issues where the includes are not case sensitive. Is there any option in GCC to make it case insensitive. I know its a long shot, as I have done reading and does not seem so.
I have a file like below. For all the lines (except for the ones listed as 'Unknown Owner' and N/A') I would like to change to lower case and concatenate the first and last names.Before:
Code: aaa.bbb.ccc.ddd,Unknown Owner ddd.eee.fff.ggg,N/A hhh.iii.jjj.kkk,John Doe aaa.bbb.ccc.ddd,Mary Jane
As you can see, I want to pass arguments depending on the option(s) chosen by the user; ie. --snooze, or --channel. By default, if no options are chosen, I'll display a usage message; though in the future I'll provide some sane defaults. I'd like to create a case statement to handle passing arguments to any number of options; something like:
Code:
wakethehellup.sh --snooze 20 --message 'wake up!'
and for the other arguments, it would have a default set. The case statement I provided fails with a syntax error "syntax error near unexpected token `$2'" near the '--snooze' in the statement, so I take it you can't pass a parameter in this way; but I'm confused as to how I'm supposed to pass different parameters to different options without the options being confused as parameters.
The issue which I am having is that, when it does the search for the correct row to be inputted into valuecheck, it will input the value as written in the database, which is in Uppercase. For this case, if I type in stupid for $Title and jerlyn for $Author, it searches the correct row, but the awk will print "STUPID" into the variable as that is what is written in the database. So how can I make my if statement case insensitive? Currently it reads like this:
Code: if [ $Title = $valuecheck ] ; then which means if [stupid = StUPiD ] ; then
How can I make the if statement it case insensitive to allow it to display "HOHOHO"
I wasn't sure where to put this so if I need to move it just let me know.I have a strange problem that I cannot figure out. When I use gdb to debug our rpm-installed program, it says (no debugging symbols found) when it loads. Thing is, when I use nm on the program it can print the symbols, and even stranger is if I use gdb on the program before it is packed up by rpmbuild it loads the debug symbols just fine.Our program is built via the standard make using:GS=-g -Wall-pedantic and as I mentioned I can debug the resulting program. After the build, I package it up using:
cmd="rpmbuild -v -bb ptsnmp.spec --define "ver ${cmvc_release}" --define "rel ${cmvc_level}" --define "_topdir $rpmdir""When this package is installed via rpm, the binary on the machine shows all the debug info via nm, file shows it is not stripped:pt_snmp: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not strippedyet when I try to debug it I get the no debugging symbols found.This is really taxing my brain and I am sure I am just missing something
I tried to add my wife , and when I put in a password for her, this error comes up."Please set a valid user name consisting of a lower case letter followed by lower case letters and numbers." I did all that and I still can't set a password for her.
I am having a weird problem where if I don't touch the mouse or keyboard after logging on, the power manager settings are being ignored. I disabled turning off the display and screen saver from the Gnome utilities, but after about 20 minutes my screen blanks and my wireless network connection gets disconnected. This is on an HTPC, so I'm usually not near the mouse or keyboard, and unfortunately button presses from the remote control don't count. Media players like MPlayer will prevent the screen from blanking, but if I'm listening to music (where the music is served over the network from another computer), this means that the screen will go blank and the music playback will freeze as the network connection is lost. If I touch the keyboard just after booting it doesn't blank the screen or disconnect my wireless, but when I forget it's very disruptive.
I am running Debian Testing (Squeeze) with a Gnome desktop environment. I'm using gdm3 to log in, but I have it set up to automatically log me on. (I use gdm on my desktop, also with Squeeze, with it configured to show login screen instead of automatically logging me on and it still displays that behavior) I have attempted the following to resolve this issue to no avail:
Disable DPMS for my screen and monitor in /etc/X11/Xorg.conf Set all the timeouts for blanking, power down, etc. to 0 in /etc/X11/Xorg.conf Flat out disabling the DPMS extension. (so it's still blanking, even if it's not actually turning on power saving mode) Putting "xset s off" in ~/.xinitrc Disabling powersave with setterm in ~/.xinitrc Removing gnome-screensaver and gnome-power-manager from the startup items.
Edit: Actually, the wireless issue seems to not be related. It disconnected again, and after some searching with the error message I saw in dmesg, it looks like others have been having the same issue. It seems to have been coincidental that it was acting up when I was testing the screen blanking issue, and hasn't given me as much trouble lately, so it seemed like it was correlated.
I've just upgraded ubuntu and i noticed that the ubuntu logo has been replaced with the text "Ubuntu 10.10". When i boot ubuntu i get a black screen for 10-15 seconds and then the text and the five dots. Before the desktop is loaded the computer shows some other text like those in verbose mode.
I want to copy files from an incoming directory, but don't want to copy a file if it hasn't finished being written. I thought of using fuser, but it doesn't seem to be very reliable. I vi'd a file in one window and then ran fuser against the file name and got nothing back. I'm just writing a simple bourne script on RHEL.
Most of the time my wireless works very well, connecting lightning-fast on boot with AC power. However here are two problems that I have noticed to-date: 1. Wireless will not connect if I boot on battery power. It won't connect even if I plug in the AC cable and do a reboot. Only solution is to reset the router (unplug power cable, wait, plug power cable). 2. Wireless will not connect after a Suspend, whether battery power or AC. Again, only solution is to reset the router. Another computer, running Windows XP, do not have connection problems (yes, wireless). It is quite strange, maybe some power management settings are interfering with networking? I have both laptop-mode-tools and pm-utils (re-rolled) installed.
However, I miss the keyboard shortcut options under kde. For instance, I would like to open various software (Chromium, Gimp, etc) with a simple F2, F3 etc. I am assuming I will need to load a start-up application/script to do this.
From tcpdump, we see: 1. client SYN-----> server 2. server SYN/ACK---> client 3. client ACK ----> server 4. client data ----> server 5. client retransmit data some times ----> server 6. server SYN/ACK ----> client (weird, it look like server miss the step 3)
I wrote a test program to get the CPU utilisation. I hope to extend it to take cpu utilisation on multi core machines. Hear I used the equation for taking cpu utilisation given at [url] of JmSchanck post. But when I match the output of my program against 'top' and 'system monitor' output it seems quite high. Sometimes cpu utilisation goes more than 100%.
So the given equation in that url is correct? can anyone give me the equation to take CPU utilisation?
I am trying to use a shell script to find a string in a file and do something when found. code...
What should happen is pppd will start in a different process and stream it's output to pppdout. pppdout should be created in the current folder. Then the script should periodically check the pppdout file for the string Script (which eventually will appear, some seconds later) and when found exit the script. Ultimately the script will do something useful when the text is found. However, the output from the program is a repeating: 'scriptname.sh: 12: FOUND: not found'
Where scriptname.sh would be the name of your script and 12 refers to the line with 'done'.
Why does grep not find the text, or at least why deos my script not check the grep output correctly?
I wanted to make some modifications to a Kate plugin, so I cloned the git repository, started doing a few changes, and it compiled. The problem is that when I run it, it uses the version of the plugin installed in the system, not the one compiled with Kate.
I've been reviewing some source code recently which contains many conditional compilation statements, and I found it hard to understand the code not knowing whether some macro is defined or not. Is there any way to test whether a macro is defined?
