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• Debugging problems in Visual Studio 2005 - No source code available for the current location

  - by espais

  Hi all I've searched up and down Google for others with a similar problem, and while I can find the error I don't think that other people have the same base problem that I do. Basically, I had to create a project for a unit-testing environment in order to run this test suite. First, I add my original C file, compile, and then a test file (C++) is generated. I then exclude my original source from the project, include this test script (which includes the original source at the top), and then run. I can debug the test file fine, but when it jumps to the original C file I get the dreaded 'no source code available for the current location' error. Both files are located within the same location, and I compiled the original file without any issue. Anybody have any thoughts about this? Its driving me crazy!

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• Setfacl configuration issue in Linux

  - by Balualways

  I am configuring a Linux Server with ACL[Access Control Lists]. It is not allowing me to perform setfacl operation on one of the directoriy /xfiles. I am able to perform the setfacl on other directories as /tmp /op/applocal/. I am getting the error as : root@asifdl01devv # setfacl -m user:eqtrd:rw-,user:feedmgr:r--,user::---,group::r--,mask:rw-,other:--- /xfiles/change1/testfile setfacl: /xfiles/change1/testfile: Operation not supported I have defined my /etc/fstab as /dev/ROOTVG/rootlv / ext3 defaults 1 1 /dev/ROOTVG/varlv /var ext3 defaults 1 2 /dev/ROOTVG/optlv /opt ext3 defaults 1 2 /dev/ROOTVG/crashlv /var/crash ext3 defaults 1 2 /dev/ROOTVG/tmplv /tmp ext3 defaults 1 2 LABEL=/boot /boot ext3 defaults 1 2 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /dev/ROOTVG/swaplv swap swap defaults 0 0 /dev/APPVG/home /home ext3 defaults 1 2 /dev/APPVG/archives /archives ext3 defaults 1 2 /dev/APPVG/test /test ext3 defaults 1 2 /dev/APPVG/oracle /opt/oracle ext3 defaults 1 2 /dev/APPVG/ifeeds /xfiles ext3 defaults 1 2 I have a solaris server where the vfstab is defined as cat vfstab #device device mount FS fsck mount mount #to mount to fsck point type pass at boot options # fd - /dev/fd fd - no - /proc - /proc proc - no - /dev/vx/dsk/bootdg/swapvol - - swap - no - swap - /tmp tmpfs - yes size=1024m /dev/vx/dsk/bootdg/rootvol /dev/vx/rdsk/bootdg/rootvol / ufs 1 no logging /dev/vx/dsk/bootdg/var /dev/vx/rdsk/bootdg/var /var ufs 1 no logging /dev/vx/dsk/bootdg/home /dev/vx/rdsk/bootdg/home /home ufs 2 yes logging /dev/vx/dsk/APP/test /dev/vx/rdsk/APP/test /test vxfs 3 yes - /dev/vx/dsk/APP/archives /dev/vx/rdsk/APP/archives /archives vxfs 3 yes - /dev/vx/dsk/APP/oracle /dev/vx/rdsk/APP/oracle /opt/oracle vxfs 3 yes - /dev/vx/dsk/APP/xfiles /dev/vx/rdsk/APP/xfiles /xfiles vxfs 3 yes - I am not able to find out the issue. Any help would be appreciated.

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• newsubtitles line not working in FFmpeg

  - by godMode

  i'm trying to run the following line on FFmpeg that will basically "re-format" an MKV file to MP4 without doing any re-encoding and also embed SRT subtitles onto the MP4 output: ffmpeg -i test.mkv -i test.srt -newsubtitle -acodec copy -vcodec copy test.mp4 Without the "-i test.srt -nwesubtitle" bit, it seems to work just fine; however, with it I get the following output: Seems stream 0 codec frame rate differs from container frame rate: 47.95 (5000000/104271) - 23.98 (24000/1001) Stream #0.0(eng): Video: h264, yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc Stream #0.1(eng): Subtitle: 0x0000 Metadata: title : English Stream #0.2(jpn): Audio: aac, 48000 Hz, stereo, s16 Metadata: title : Japanese 2.0 Stream #0.3(eng): Audio: aac, 48000 Hz, stereo, s16 Metadata: title : English 2.0 Stream #0.4(eng): Subtitle: 0x0000 Metadata: title : English Songs & Signs Stream #0.5: Attachment: 0x0000 Metadata: filename : MyriadPro-Bold.ttf Stream #0.6: Attachment: 0x0000 Metadata: filename : MyriadPro-RegularHaruhi.ttf Stream #0.7: Attachment: 0x0000 Metadata: filename : ChaparralPro-BoldIt.ttf Stream #0.8: Attachment: 0x0000 Metadata: filename : ChaparralPro-SemiboldIt.ttf Stream #0.9: Attachment: 0x0000 Metadata: filename : epmgobld_ending.ttf Stream #0.10: Attachment: 0x0000 Metadata: filename : epminbld_opening.ttf Stream #0.11: Attachment: 0x0000 Metadata: filename : Folks-Bold.ttf Stream #0.12: Attachment: 0x0000 Metadata: filename : GosmickSansBold.ttf Stream #0.13: Attachment: 0x0000 Metadata: filename : WarnockPro-LightDisp.ttf Stream #0.14: Attachment: 0x0000 Metadata: filename : epmgobld_ending.ttf Stream #0.15: Attachment: 0x0000 Metadata: filename : GosmickSansBold.ttf Stream #0.16: Attachment: 0x0000 Metadata: filename : Marker SD 1.2.ttf Stream #0.17: Attachment: 0x0000 Metadata: filename : MyriadPro-Bold.ttf Stream #0.18: Attachment: 0x0000 Metadata: filename : MyriadPro-RegularHaruhi.ttf Stream #0.19: Attachment: 0x0000 Metadata: filename : MyriadPro-SemiCn.ttf test.srt: Invalid data found when processing input I tried adding "-r pal", "-r ntsc" or "-r 23.98" thinking it was framerate issue with no change.

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• Why is my new Phenom II 965 BE not significantly faster than my old Athlon 64 X2 4600+?

  - by Software Monkey

  I recently rebuilt my 5 year old computer. I upgraded all core components, in particular from an Athlon 64 X2 4600+ at 2.4 GHz with DDR2 800 to a Phenom II 965 BE (quad core) at 3.6 GHz with DDR3 1333 (actually 1600, but testing consistently detected memory errors at 1600). The motherboard is also much newer and better. The HDD's (x3), DVD writer and card reader are the same. The BIOS memory config is auto-everything except the base timing which I overrode to 1T instead of 2T. The BIOS CPU multiplier is slightly over-clocked to 3.6 GHz from the stock 3.4 GHz. I noticed compiling Java is slower than I expected. As it happens I have some (single-threaded) Java pattern-matching code which is CPU and memory bound and for which I have performance numbers recorded on a number of hardware platforms, including my old system. So I did a test run on the new equipment and was stunned to find that the numbers are only slightly better than my old system, about 25%. The data set it is operating on is a 148,975 character array, which should easily fit in caches, but in any event the new CPU has larger caches all around. The system was, of course, otherwise idle for the test and the test run is a timed 10 seconds to eliminate scheduling anomalies. A long while ago, when I upgraded only memory from DD2 667 to DDR2 800 there was no change in performance of this test, which subjectively supports that the test cycle does not need to (significantly) access main memory, but yes it is creating and garbage collecting a large number of objects in the process of this test (low millions of matches are found for the pattern set). I am about 99.999% certain the code hasn't changed since I last ran it on 2009-03-17 - but I can't easily retest the old hardware, because it is currently in pieces on my work-bench waiting to be built into a new computer for my kids. Note that Windows (XP) reports a CPU speed of 795 MHz unless I have some thing running. With stuff running it seems to jump all over the place each time I use ALT-Pause to display the system properties, everywhere from 795 MHz to 3.4 Ghz. So why might my shiny new hardware under-performing so badly? EDIT: The old memory was Mushkin DDR2 800 with timings set for auto which should have been 5-5-5-12. The new memory is Corsair DDR3 1600, running at 1333 with timings also auto which are 9-9-9-21. In both cases they are a paired set of dual channel DIMMs. I was waiting to ensure my system was stable before tweaking with memory timings.

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• Active FTP client blocked on Windows XP

  - by Ian Hannah

  Summary We have a FTP server (running in active mode). We have an FTP client which is connecting to the server, carrying out a task and then closing the connection. The FTP Client can perform this operation on multiple threads. Problem We have a situation where customers are experiencing occasional failures to carry out operations on a FTP connection. The actual connection has been made to the server but when the server attempts to return data on the data port if fails. Observations We have a simple test FTP client which is running two separate threads. Each thread is performing a recursive listing of files from a root directory. With the firewall running on the client machine the hang happens within a few minutes. If the firewall is turned off on the client machine, the test application seems to run correctly. This does point to a potential firewall issue. However, with the firewall on we can list files on our company FTP server without any issues. If the simple test FTP client runs a single thread then we do not experience any problems whether or not the firewall is turned on. We have another simple test FTP client which was running 4 threads (with each opening a new FTP connection, doing a directory listing and closing the FTP connection as fast as possible) overnight with the firewall turned off. With the firewall turned on it fails in a short space of time. The confusing thing is that if the test FTP client and the FTP server are run on the same machine the failure occurs even though the firewall is turned off. This means that the problem may not be firewall related. Any help with what this could be would be much appreciated. Thanks Ian

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• Why doesn't this Firefox bookmark keyword work?

  - by MiffTheFox

  I have the keyword bookmark it's the same location as another one with a different keyword which works. I type google test and it takes me to http://www.google.com/search?hl=en&q=test, but I type g test and it takes me to the first result from I'm feeling luck as if there were no bookmark keyword there at all. Firefox 3.6 on Windows Vista.

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• unit/integration testing web service proxy client

  - by cori

  I'm rewriting a PHP client/proxy library that provides an interface to a SOAP-based .Net webservice, and in the process I want to add some unit and integration tests so future modifications are less risky. The work the library I'm working on performs is to marshall the calls to the web service and do a little reorganizing of the responses to present a slightly more -object-oriented interface to the underlying service. Since this library is little else than a thin layer on top of web service calls, my basic assumption is that I'll really be writing integration tests more than unit tests - for example, I don't see any reason to mock away the web service - the work that's performed by the code I'm working on is very light; it's almost passing the response from the service right back to its consumer. Most of the calls are basic CRUD operations: CreateRole(), CreateUser(), DeleteUser(), FindUser(), &ct. I'll be starting from a known database state - the system I'm using for these tests is isolated for testing purposes, so the results will be more or less predictable. My question is this: is it natural to use web service calls to confirm the results of operations within the tests and to reset the state of the application within the scope of each test? Here's an example: One test might be createUserReturnsValidUserId() and might go like this: public function createUserReturnsValidUserId() { // we're assuming a global connection to the service $newUserId = $client->CreateUser("user1"); assertNotNull($newUserId); assertNotNull($client->FindUser($newUserId); $client->deleteUser($newUserId); } So I'm creating a user, making sure I get an ID back and that it represents a user in the system, and then cleaning up after myself (so that later tests don't rely on the success or failure of this test w/r/t the number of users in the system, for example). However this still seems pretty fragile - lots of dependencies and opportunities for tests to fail and effect the results of later tests, which I definitely want to avoid. Am I missing some options of ways to decouple these tests from the system under test, or is this really the best I can do? I think this is a fairly general unit/integration testing question, but if it matters I'm using PHPUnit for the testing framework.

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• dell 8200 dimension power supply

  - by silva

  How can I test the power supply of my dell 8200

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• PHP include() through HTTP makes Apache time out

  - by Adam Interact

  I have a problem with ExpressionEngine2 after moving from an old server to WHM/cPanel running on CentOS6.4. Simple test code to reproduce that issue: <?php $protocol = strpos(strtolower($_SERVER['SERVER_PROTOCOL']),'https') === FALSE ? 'http' : 'https'; $host = $_SERVER['HTTP_HOST']; include($protocol . '://' . $host . '/header.html'); ?> <p> Main text...</p> <?php include($protocol . '://' . $host . '/footer.html'); ?> Where header.html looks like <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Untitled Document</title> </head> <body> and footer.html looks like: </body> </html> Creates Apache time out: Warning: include(http://www.domain.com/header.html) [function.include]: failed to open stream: Connection timed out in /home/domain/public_html/test/index.php on line 5 Warning: include() [function.include]: Failed opening 'http://www.domain.com/header.html' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/domain/public_html/test/index.php on line 5 Main text... Warning: include(http://www.domain.com/footer.html) [function.include]: failed to open stream: Connection timed out in /home/domain/public_html/test/index.php on line 12 Warning: include() [function.include]: Failed opening 'http://www.domain.com/footer.html' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/domain/public_html/test/index.php on line 12 Any clue what can be wrong with Apache or PHP configuration? Thanks

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• Apache in front of tomcat on Railo proxy with ajp

  - by user1468116

  I'm trying to setup apache in front of the tomcat embedded in railo. I have this settings: <VirtualHost *:80> DocumentRoot "/var/www/myapp" ServerName www.myapp.test ServerAlias www.myapp.test ProxyRequests Off ProxyPass /app ! <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPreserveHost On ProxyPassReverse / ajp://%{HTTP_HOST}:8009/ RewriteEngine On # If it's a CFML (*.cfc or *.cfm) request, just proxy it to Tomcat: RewriteRule ^(.+\.cf[cm])(/.*)?$ ajp://%{HTTP_HOST}:8009/$1$2 [P] My server.xml : <Host name="www.myapp.test" appBase="webapps" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false"> <Context path="" docBase="/var/www/myapp" /> <Alias>myapp.test</Alias> </Host> The index is loaded, but if I try to load some internal page I got: The proxy server could not handle the request GET /report/myreportname. Reason: DNS lookup failure for: localhost:8009report Could you help me?

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• How to analyze a scenario where a bug didn't get caught and adjust development workflow to prevent similar errors

  - by durron597

  I had a bug that was really difficult to track down, because all the unit tests were green, but the production application didn't work properly. Here's what happened: I had a filter class that set my application to ignore data that was not in some specified time windows. The unit test, which seemed thorough to me, turned green. Additionally, my integration tests also produced results as expected. Production, however, did not work. As a result of the first two bullets, this problem was very difficult to find. It turned out the problem was that my test dates were using my time zone (America/Chicago) but the production data was providing dates in UTC, which I did not realize, and the logic for the filter wasn't correct for UTC dates. (I was using joda time DateTime objects). Where did my workflow break down? Did I fail to produce a spec that specified that the logic needed to handle dates in any time zone? Did I fail to thoroughly consider all cases at the unit test level? Did I fail to insure the integration test was sufficiently similar to production? Other? What changes can I make to my workflow to better prevent this sort of mistake in the future? How can I more effectively debug a problem when there is an issue in production but not in testing?

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• Anonymous access to SMB share hosted on Server 2008 R2 Enterprise

  - by bwerks

  Hi all, First off, I have read through this post and a whole slew of non-SF posts which seem to address the same or a similar problem, however I was still unable to fix my problem. I've got three machines in this situation: a domain-joined server that runs Server 2008 R2 Enterprise ("share server") a domain-joined workstation running XP Pro SP3 ("test server") a domain-unjoined test server running Server 2003 R2 SP2 ("workstation") The share server is exposing a share on the network that the test server must access--it's a Source/Symbol Server share for our debugging purposes. I believe visual studio simply accesses the the share with its own credentials in this case, meaning that the share must be accessible anonymously since the test server isn't joined to the domain and there's no opportunity to supply domain authentication. I've attempted a lot of things to avoid the authentication window when accessing the share: I've enabled the Guest account on the share server and given Guest full sharing/NTFS permissions for the share. I've given ANONYMOUS LOGON full sharing/NTFS permissions for the share. I've added my share to “Network Access: Shares that can be accessed anonymously” in LSP. I've disabled “Network access: Restrict anonymous access to Named Pipes and Shares” in LSP. I've enabled “Network access: Let Everyone permissions apply to anonymous users” in LSP. Added ANONYMOUS LOGON to “Access this computer from the network” in LSP. Added the Guest account to “Access this computer from the network” in LSP. Attempted to provision the share using the Share and Storage Management MMC snap-in. Unfortunately when I attempt to access the share from the test server, I still see the prompt and I'm forced to enter "Guest" manually. I also tried this workflow using the local administrator account on a workstation, and the same thing happens both with and without XP Simple File Sharing enabled. Any idea why I'm getting these results, or what I should have done differently?

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• What can you do to decrease the number of live issues with applications?

  - by User Smith

  First off I have seen this post which is slightly similar to my question. : What can you do to decrease the number of deployment bugs of a live website? Let me layout the situation for you. The team of programmers that I belong to have metrics associated with our code. Over the last several months our errors in our live system have increased by a large amount. We require that our updates to applications be tested by at least one other programmer prior to going live. I personally am completely against this as I think that applications should be tested by end users as end users are much better testers than programmers, I am not against programmers testing, obviously programmers need to test code, but they are most of the times too close to the code. The reason I specify that I think end users should test in our scenario is due to the fact that we don't have business analysts, we just have programmers. I come from a background where BAs took care of all the testing once programmers checked off it was ready to go live. We do have a staging environment in place that is a clone of the live environment that we use to ensure that we don't have issues between development and live environments this does catch some bugs. We don't do end user testing really at all, I should say we don't really have anyone testing our code except programmers, which I think gets us into this mess (Ideally, we would have BAs or QA or professional testers test). We don't have a QA team or anything of that nature. We don't have test cases for our projects that are fully laid out. Ok, I am just a peon programmer at the bottom of the rung, but I am probably more tired of these issues than the managers complaining about them. So, I don't have the ability to tell them you are doing it all wrong.....I have tried gentle pushes in the correct direction. Any advice or suggestions on how to alleviate this issue is greatly appreciated. Thanks.

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• Postgresql by network

  - by sev

  I have running PostgreSQL sever on 192.168.0.102:5432. postgresql.conf has this line: listen_addresses = '*' and pg_hba.conf has this one: host all all 127.0.0.1/32 trust I have Rails app with same config/database.yml development: adapter: postgresql host: 192.168.0.102 port: 5432 encoding: unicode database: test pool: 5 username: test password: But when I run rake db:migrate I get (I run this from 192.168.0.100) FATAL: no pg_hba.conf entry for host "192.168.0.100", user "test", database "postgres", SSL on FATAL: no pg_hba.conf entry for host "192.168.0.100", user "test", database "postgres", SSL off ... Who can help with this?

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• C printf not working on ubuntu 13.10 terminal

  - by Blaze Tama

  First, im new in ubuntu so please bear with me. I need to create a C based program for a course in my university. I was using opensuse and its konsole when i was in the university's lab. So basically i need to install opensuse on my system or using a vmware. But i feel lazy to do that, so i tried to run it on my ubuntu instead of opensuse. However, no C code seems working on ubuntu's terminal. The compiling is success, but its not running, or at least the printf is not running. This is my code, a very very simple one : #include<stdio.h> #include<unistd.h> #include<stdlib.h> int main() { printf("test"); return 0; } When i compile it with gcc test.c -o test everything work fine and i get an executeable file. Then i try to run it by ./test, but the printf is not printed. No error or warning was shown. Am i missing something? Note : my gcc is the new one, it should has no problem. Thanks for your help :D

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• What can be done to decrease the number of live issues with applications?

  - by User Smith

  First off I have seen this post which is slightly similar to my question. : What can you do to decrease the number of deployment bugs of a live website? Let me layout the situation for you. The team of programmers that I belong to have metrics associated with our code. Over the last several months our errors in our live system have increased by a large amount. We require that our updates to applications be tested by at least one other programmer prior to going live. I personally am completely against this as I think that applications should be tested by end users as end users are much better testers than programmers, I am not against programmers testing, obviously programmers need to test code, but they are most of the times too close to the code. The reason I specify that I think end users should test in our scenario is due to the fact that we don't have business analysts, we just have programmers. I come from a background where BAs took care of all the testing once programmers checked off it was ready to go live. We do have a staging environment in place that is a clone of the live environment that we use to ensure that we don't have issues between development and live environments this does catch some bugs. We don't do end user testing really at all, I should say we don't really have anyone testing our code except programmers, which I think gets us into this mess (Ideally, we would have BAs or QA or professional testers test). We don't have a QA team or anything of that nature. We don't have test cases for our projects that are fully laid out. Ok, I am just a peon programmer at the bottom of the rung, but I am probably more tired of these issues than the managers complaining about them. So, I don't have the ability to tell them you are doing it all wrong.....I have tried gentle pushes in the correct direction. Any advice or suggestions on how to alleviate this issue ?

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• Configure IIS Web Site for alternate Port and receive Access Permission error

  - by Andrew J. Brehm

  When I configure IIS to run a Web site on Port 1414, I get the following error: --------------------------- Internet Information Services (IIS) Manager --------------------------- The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020) However, as according to netstat the port is not in use. Completely aside from IIS, I wrote a test program (just to open the port and test it): TcpListener tcpListener; tcpListener = new TcpListener(IPAddress.Any, port); try { tcpListener.Start(); Console.WriteLine("Press \"q\" key to quit."); ConsoleKeyInfo key; do { key = Console.ReadKey(); } while (key.KeyChar != 'q'); } catch (Exception ex) { Console.WriteLine(ex.Message); } tcpListener.Stop(); The result was an exception and the following ex.Message: An attempt was made to access a socket in a way forbidden by its access permissions The port was available but its "access permissions" are not allowing me access. This remains after several restarts. The port is not reserved or in use as far as I know and while IIS says it is in use, netstat and my test program say it is not and my test program receives the error that I am not allowed to access the port. The test program ran elevated. The IIS Site is running MQSeries, but the MQ listener also cannot start on port 1414 because of this issue. A quick search of my registry found nothing interesting for port 1414. What are socket access permissions and how can I correct mine to allow access?

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• Code Behaviour via Unit Tests

  - by Dewald Galjaard

  Normal 0 false false false EN-ZA X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Some four months ago my car started acting up. Symptoms included a sputtering as my car’s computer switched between gears intermittently. Imagine building up speed, then when you reach 80km/h the car magically and mysteriously decide to switch back to third or even second gear. Clearly it was confused! I managed to track down a technician, an expert in his field to help me out. As he fitted his handheld computer to some hidden port under the dash, he started to explain “These cars are quite intelligent, you know. When they sense something is wrong they run in a restrictive program which probably account for how you managed to drive here in the first place...”  I was surprised and thought this was certainly going to be an interesting test drive. The car ran smoothly down the first couple of stretches as the technician ran through routine checks. Then he said “Ok, all looking good. We need to start testing aspects of the gearbox. Inside the gearbox there are a couple of sensors. One of them is a speed sensor which talks to the computer, which in turn will decide which gear to switch to. The restrictive program avoid these sensors altogether and allow the computer to obtain its input from other [non-affected] sources”. Then, as soon as he forced the speed sensor to come back online the symptoms and ill behaviour re-emerged... What an incredible analogy for getting into a discussion on unit testing software? Besides I should probably put my ill fortune to some good use, right? This example provide a lot of insight into how and why we should conduct unit tests when writing code. More importantly, it captures what is easily and unfortunately often the most overlooked goal of writing unit tests by those new to the art and those who oppose it alike - The goal of writing unit tests is to test the behaviour of our code under predefined conditions. Although it is very possible to test the intrinsic workings of each and every component in your code, writing several tests for each method in practise will soon prove to be an exhausting and ultimately fruitless exercise given the certain and ever changing nature of business requirements. Consequently it is true and quite possible whilst conducting proper unit tests, to call any single method several times as you examine and contemplate different scenarios. Let’s write some code to demonstrate what I mean. In my example I make use of the Moq framework and NUnit to create my tests. Truly you can use whatever you’re comfortable with. First we’ll create an ISpeedSensor interface. This is to represent the speed sensor located in the gearbox.  Then we’ll create a Gearbox class which we’ll pass to a constructor when we instantiate an object of type Computer. All three are described below.   ISpeedSensor.cs namespace AutomaticVehicle {     public interface ISpeedSensor     {         int ReportCurrentSpeed();     } }   Gearbox.cs namespace AutomaticVehicle {      public class Gearbox     {         private ISpeedSensor _speedSensor;           public Gearbox( ISpeedSensor gearboxSpeedSensor )         {             _speedSensor = gearboxSpeedSensor;         }         /// <summary>         /// This method obtain it's reading from the speed sensor.         /// </summary>         /// <returns></returns>         public int ReportCurrentSpeed()         {             return _speedSensor.ReportCurrentSpeed();         }     } } Computer.cs namespace AutomaticVehicle {     public class Computer     {         private Gearbox _gearbox;         public Computer( Gearbox gearbox )         {                     }          public int GetCurrentSpeed()         {             return _gearbox.ReportCurrentSpeed( );         }     } } Since this post is about Unit testing, that is exactly what we’ll create next. Create a second project in your solution. I called mine AutomaticVehicleTests and I immediately referenced the respective nunit, moq and AutomaticVehicle dll’s. We’re going to write a test to examine what happens inside the Computer class. ComputerTests.cs namespace AutomaticVehicleTests {     [TestFixture]     public class ComputerTests     {         [Test]         public void Computer_Gearbox_SpeedSensor_DoesThrow()         {             // Mock ISpeedSensor in gearbox             Mock< ISpeedSensor > speedSensor = new Mock< ISpeedSensor >( );             speedSensor.Setup( n => n.ReportCurrentSpeed() ).Throws<Exception>();             Gearbox gearbox = new Gearbox( speedSensor.Object );               // Create Computer instance to test it's behaviour  towards an exception in gearbox             Computer carComputer = new Computer( gearbox );             // For simplicity let’s assume for now the car only travels at 60 km/h.             Assert.AreEqual( 60, carComputer.GetCurrentSpeed( ) );          }     } }   What is happening in this test? We have created a mocked object using the ISpeedsensor interface which we've passed to our Gearbox object. Notice that I created the mocked object using an interface, not the implementation. I’ll talk more about this in future posts but in short I do this to accentuate the fact that I'm not not really concerned with how SpeedSensor work internally at this particular point in time. Next I’ve gone ahead and created a scenario where I’ve declared the speed sensor in Gearbox to be faulty by forcing it to throw an exception should we ask Gearbox to report on its current speed. Sneaky, sneaky. This test is a simulation of how things may behave in the real world. Inevitability things break, whether it’s caused by mechanical failure, some logical error on your part or a fellow developer which didn’t consult the documentation (or the lack thereof ) - whether you’re calling a speed sensor, making a call to a database, calling a web service or just trying to write a file to disk. It’s a scenario I’ve created and this test is about how the code within the Computer instance will behave towards any such error as I’ve depicted. Now, if you’ve followed closely in my final assert method you would have noticed I did something quite unexpected. I might be getting ahead of myself now but I’m testing to see if the value returned is equal to what I expect it to be under perfect conditions – I’m not testing to see if an error has been thrown! Why is that? Well, in short this is TDD. Test Driven Development is about first writing your test to define the result we want, then to go back and change the implementation within your class to obtain the desired output (I need to make sure I can drive back to the repair shop. Remember? ) So let’s go ahead and run our test as is. It’s fails miserably... Good! Let’s go back to our Computer class and make a small change to the GetCurrentSpeed method.   Computer.cs public int GetCurrentSpeed() {   try   {     return _gearbox.ReportCurrentSpeed( );   }   catch   {     RunRestrictiveProgram( );   } }     This is a simple solution, I know, but it does provide a way to allow for different behaviour. You’re more than welcome to provide an implementation for RunRestrictiveProgram should you feel the need to. It's not within the scope of this post or related to the point I'm trying to make. What is important is to notice how the focus has shifted in our approach from how things can break - to how things behave when broken.   Happy coding!

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• What steps to take when CPAN installation fails?

  - by pythonic metaphor

  I have used CPAN to install perl modules on quite a few occasions, but I've been lucky enough to just have it work. Unfortunately, I was trying to install Thread::Pool today and one of the required dependencies, Thread::Converyor::Monitored failed the test: Test Summary Report ------------------- t/Conveyor-Monitored02.t (Wstat: 65280 Tests: 89 Failed: 0) Non-zero exit status: 255 Parse errors: Tests out of sequence. Found (2) but expected (4) Tests out of sequence. Found (4) but expected (5) Tests out of sequence. Found (5) but expected (6) Tests out of sequence. Found (3) but expected (7) Tests out of sequence. Found (6) but expected (8) Displayed the first 5 of 86 TAP syntax errors. Re-run prove with the -p option to see them all. Files=3, Tests=258, 6 wallclock secs ( 0.07 usr 0.03 sys + 4.04 cusr 1.25 csys = 5.39 CPU) Result: FAIL Failed 1/3 test programs. 0/258 subtests failed. make: *** [test_dynamic] Error 255 ELIZABETH/Thread-Conveyor-Monitored-0.12.tar.gz /usr/bin/make test -- NOT OK //hint// to see the cpan-testers results for installing this module, try: reports ELIZABETH/Thread-Conveyor-Monitored-0.12.tar.gz Running make install make test had returned bad status, won't install without force Failed during this command: ELIZABETH/Thread-Conveyor-Monitored-0.12.tar.gz: make_test NO What steps do you take to start seeing why an installation failed? I'm not even sure how to begin tracking down what's wrong.

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• Unattended Kickstart Install

  - by Eric

  I've looked around quite a bit and have seen similar setup and questions, but none seem to work for me. I'm using the following command to create a custom ISO: /usr/bin/livecd-creator --config=/usr/share/livecd-tools/test.ks --fslabel=TestAppliance --cache=/var/cache/live This works great and it creates the ISO with all of the packages and configs I want on it. My issue is that I want the install to be unattended. However, every time I start the CD, it asks for all of the info such as keyboard, time zone, root password, etc. These are my basic settings I have in my kickstart script prior to the packages section. cdrom install autopart autostep xconfig --startxonboot rootpw testpassword lang en_US.UTF-8 keyboard us timezone --utc America/New_York auth --useshadow --enablemd5 selinux --disabled services --enabled=iptables,rsyslog,sshd,ntpd,NetworkManager,network --disabled=sendmail,cups,firstboot,ip6tables clearpart --all So after looking around, I was told that I need to modify my isolinux.cfg file to either do "ks=http://X.X.X.X/location/to/test.ks" or "ks=cdrom:/test.ks". I've tried both methods and it still forces me to go through the install process. When I tail the apache logs on the server, I see that the ISO never even tries to get the file. Below are the exact syntax I'm trying on my isolinux.cfg file. label http menu label HTTP kernel vmlinuz0 append initrd=initrd0.img ks=http://192.168.56.101/files/test.ks ksdevice=eth0 label localks menu label LocalKS kernel vmlinuz0 append initrd=initrd0.img ks=cdrom:/test.ks label install0 menu label Install kernel vmlinuz0 append initrd=initrd0.img root=live:CDLABEL=PerimeterAppliance rootfstype=auto ro liveimg liveinst noswap rd_NO_LUKS rd_NO_MD rd_NO_DM menu default EOF_boot_menu The first 2 give me a "dracut: fatal: no or empty root=" error until I give it a root= option and then it just skips the kickstart completely. The last one is my default option that works fine, but just requires a lot of user input. Any help would be greatly appreciated.

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• Installing nvidia drivers causes computer to boot to command prompt.

  - by levesque

  Hi, I have an Asus u30jc laptop, which comes with the Optimus prime graphics card switching technology that is now supported under 2.6.35, so I decided to give it a try. First I made sure the discrete graphics card was activated and then I installed the drivers proposed by the ubuntu software repository (nvidia-current). However, after rebooting all I got was a command prompt. My graphics card is a nvidia 310M. This is on Ubuntu 10.10 64 bits. What can I do to diagnose/identify the source of this problem? UPDATE: The messsages in my syslog tell me to check the xorg log: Oct 11 12:42:59 u30jc-test gdm-binary[1095]: WARNING: GdmDisplay: display lasted 0.053144 seconds Oct 11 12:42:59 u30jc-test gdm-simple-slave[1450]: WARNING: Unable to load file '/etc/gdm/custom.conf': No such file or directory Oct 11 12:42:59 u30jc-test gdm-binary[1095]: WARNING: GdmDisplay: display lasted 0.038176 seconds Oct 11 12:42:59 u30jc-test gdm-binary[1095]: WARNING: GdmLocalDisplayFactory: maximum number of X display failures reached: check X server log for errors Which I did. I found this message in my /var/log/Xorg.0.log : Fatal server error: [ 113.540] no screens found [ 113.540] What does that mean?

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• rm command not ask before delete

  - by apis17

  i have centos VPS created using XEN + OpenVZ virtualization. -bash-3.2# uname -a Linux host.domain.com 2.6.18-274.7.1.el5.028stab095.1xen #1 SMP Mon Oct 24 22:10:04 MSD 2011 i686 i686 i386 GNU/Linux there are no question asked when i want to delete file(s) -bash-3.2# vi test.txt -bash-3.2# rm test.txt -bash-3.2# the main server (not virtualized one) is asking me first before delete any files. [root@main ~]# vi test.txt [root@main ~]# rm test.txt rm: remove regular file `test.txt'? y [root@main ~]# how to configure virtualized environment to prompt me before deleting any file(s)? thank you.

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• Tips for achieving "continual" delivery

  - by Ben

  A team is experiencing difficulty releasing software on a frequent basis (once every week). What follows is a typical release timeline: During the iteration: Developers work on stories on the backlog on short-lived (this is enthusiastically enforced) feature branches based on the master branch. Developers frequently pull their feature branches into the integration branch, which is continually built and tested (as far as the test coverage goes) automatically. The testers have the ability to auto-deploy integration to a staging environment and this occurs multiple times per week, enabling continual running of their test suites. Every Monday: there is a release planning meeting to determine which stories are "known good" (based on the testers' work), and hence will be in the release. If there is a known issue with a story, the source branch is pulled out of integration. no new code (only bug fixes requested by the testers) may be pulled into integration on this Monday to ensure the testers have a stable codebase to cut a release from. Every Tuesday: The testers have tested the integration branch as much as they possibly can have given the time available and there are no known bugs so a release is cut and pushed out to the production nodes slowly. This sounds OK in practise, but we have found that it is incredibly difficult to achieve. The team sees the following symptoms "subtle" bugs are found on production that were not identified on the staging environment. last minute hot-fixes continue into the Tuesday. problems on the production environment require roll-backs which blocks continued development until a successful live deployment is achieved and the master branch can be updated (and hence branched from). I think test coverage, code quality, ability to regression test quickly, last minute changes and environmental differences are at play here. Can anyone offer any advice regarding how best to achieve "continual" delivery?

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• su not giving proper message for restricted LDAP groups

  - by user1743881

  I have configured PAM authentication on Linux box to restrict particular group only to login. I have enabled pam and ldap through authconfig and modified access.conf like below, [root@test root]# tail -1 /etc/security/access.conf - : ALL EXCEPT root test-auth : ALL Also modified sudoers file, to get su for this group <code> [root@test ~]# tail -1 /etc/sudoers %test-auth ALL=/bin/su</code> Now, only this ldap group members can login to system. However when from any of this authorized user, I tried for su, it asks for password and then though I enter correct password it gives message like Incorrect password and login failed. /var/log/secure shows that user is not having permission to get the access, but then it should print message like Access denied.The way it prints for console login. My functionality is working but its no giving proper messages. Could anyone please help on this. My /etc/pam.d/su file, [root@test root]# cat /etc/pam.d/su #%PAM-1.0 auth sufficient pam_rootok.so # Uncomment the following line to implicitly trust users in the "wheel" group. #auth sufficient pam_wheel.so trust use_uid # Uncomment the following line to require a user to be in the "wheel" group. #auth required pam_wheel.so use_uid auth include system-auth account sufficient pam_succeed_if.so uid = 0 use_uid quiet account include system-auth password include system-auth session include system-auth session optional pam_xauth.so

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• Installing mysqlnd for php 5.4.9 on CentOs 6.3

  - by kira423

  Okay let me get straight to the point, I am a complete noob, and have never done stuff like this at all, I have read tutorial after tuorial but I cant get anything to work. When I tried to install the rpm file I got this error rpm -Uvh ftp://ftp.pbone.net/mirror/rpms.famillecollet.com/enterprise/6/test/x86_64/php-mysqlnd-5.4.9-1.el6.remi.x86_64.rpm Retrieving ftp://ftp.pbone.net/mirror/rpms.famillecollet.com/enterprise/6/test/x86_64/php-mysqlnd-5.4.9-1.el6.remi.x86_64.rpm warning: /var/tmp/rpm-tmp.ez4vvd: Header V3 DSA/SHA1 Signature, key ID 00f97f56: NOKEY error: Failed dependencies: php-pdo(x86-64) = 5.4.9-1.el6.remi is needed by php-mysqlnd-5.4.9-1.el6.remi.x86_64 so I tried installing that rpm file and got this error rpm -ivh ftp://ftp.pbone.net/mirror/rrpms.famillecollet.com/enterprise/6/test/x86_64/php-pdo-5.4.6-1.el6.remi.x86_64.rpm Retrieving ftp://ftp.pbone.net/mirror/rrpms.famillecollet.com/enterprise/6/test/x86_64/php-pdo-5.4.6-1.el6.remi.x86_64.rpm curl: (9) Server denied you to change to the given directory error: skipping ftp://ftp.pbone.net/mirror/rrpms.famillecollet.com/enterprise/6/test/x86_64/php-pdo-5.4.6-1.el6.remi.x86_64.rpm - transfer failed I used the ftp links because I have no idea how else to get them to the server. I think I am getting overly frustrated with this, but I have to get this driver installed for any of my scripts to function correctly. Any help would be greatly appreciated!

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