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  • Calling functions from the Immediate Window during debugging -- advanced Visual Studio kung-fu test

    - by kizzx2
    I see some related questions have been asked, but they're either too advanced for me to grasp or lacking a step-by-step guide from start to finish (most of them end up being insider talk of their own experiment results). OK here it is, given this simple program: #include <stdio.h> #include <string.h> int main() { FILE * f; char buffer[100]; memset(buffer, 0, 100); fun(); f = fopen("main.cpp", "r"); fread(buffer, 1, 99, f); printf(buffer); fclose(f); return 0; } What it does is basically print itself (assume file name is main.cpp). Question How can I have it print another file, say foobar.txt without modifying the source code? It has something to do with running it through VS's, stepping through the functions and hijacking the FILE pointer right before fread() is called. No need to worry about leaking resources by calling fclose(). I tried the simple f = fopen("foobar.txt", "r") which gave CXX0017: Error: symbol "fopen" not found Any ideas?

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  • Rails: How to test state_machine?

    - by petRUShka
    Please, help me. I'm confused. I know how to write state-driven behavior of model, but I don't know what should I write in specs... My model.rb file look class Ratification < ActiveRecord::Base belongs_to :user attr_protected :status_events state_machine :status, :initial => :boss do state :boss state :owner state :declarant state :done event :approve do transition :boss => :owner, :owner => :done end event :divert do transition [:boss, :owner] => :declarant end event :repeat do transition :declarant => :boss end end end I use state_machine gem. Please, show me the course.

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  • Why is an inverse loop faster than a normal loop (test included)

    - by Saif Bechan
    I have been running some small tests in PHP on loops. I do not know if my method is good. I have found that a inverse loop is faster than a normal loop. I have also found that a while-loop is faster than a for-loop. Setup <?php $counter = 10000000; $w=0;$x=0;$y=0;$z=0; $wstart=0;$xstart=0;$ystart=0;$zstart=0; $wend=0;$xend=0;$yend=0;$zend=0; $wstart = microtime(true); for($w=0; $w<$counter; $w++){ echo ''; } $wend = microtime(true); echo "normal for: " . ($wend - $wstart) . "<br />"; $xstart = microtime(true); for($x=$counter; $x>0; $x--){ echo ''; } $xend = microtime(true); echo "inverse for: " . ($xend - $xstart) . "<br />"; echo "<hr> normal - inverse: " . (($wend - $wstart) - ($xend - $xstart)) . "<hr>"; $ystart = microtime(true); $y=0; while($y<$counter){ echo ''; $y++; } $yend = microtime(true); echo "normal while: " . ($yend - $ystart) . "<br />"; $zstart = microtime(true); $z=$counter; while($z>0){ echo ''; $z--; } $zend = microtime(true); echo "inverse while: " . ($zend - $zstart) . "<br />"; echo "<hr> normal - inverse: " . (($yend - $ystart) - ($zend - $zstart)) . "<hr>"; echo "<hr> inverse for - inverse while: " . (($xend - $xstart) - ($zend - $zstart)) . "<hr>"; ?> Average Results The difference in for-loop normal for: 1.0908501148224 inverse for: 1.0212800502777 normal - inverse: 0.069570064544678 The difference in while-loop normal while: 1.0395669937134 inverse while: 0.99321985244751 normal - inverse: 0.046347141265869 The difference in for-loop and while-loop inverse for - inverse while: 0.0280601978302 Questions My question is can someone explain these differences in results? And is my method of benchmarking been correct?

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  • Is there a way to prevent Maven Test from rebuilding the database?

    - by Christopher W. Allen-Poole
    I've recently been asked to, effectively, sell my department on unit testing. I can't tell you how excited this makes me, but I do have one concern. We're using JUnit with Spring and Maven, and this means that each time mvn test is called, it rebuilds the database. Obviously, we can't integrate that with our production server -- it would kill valuable data. How do I prevent the rebuilding without telling maven to skip testing? The best I could figure was to assign the script to operate in a test database (line breaks added for readability): mvn test -Ddbunit.schema=<database>test -Djdbc.url=jdbc:mysql://localhost/<database>test? createDatabaseIfNotExist=true&amp; useUnicode=true&amp;characterEncoding=utf-8 I can't help but think there must be a better way. I'm especially interested in learning if there is an easy way to tell Maven to only run tests on particular classes without building anything else? mvn -Dtest=<test-name> test still rebuilds the database. ======= update ======= Bit of egg on my face here. I didn't realize that I was using the same variable in two places, meaning that the POM was using a "skip.test" variable for both rebuilding the database and for running the tests...

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  • Test if single linked list is circular by traversing it only once

    - by user1589754
    I am a fresher and I was asked this question in a recent interview I gave. The question was --- By traversing each element of linked list just once find if the single linked list is circular at any point. To this I answered that we will store reference of each node while traversing the list in another linked list and for every node in the list being tested we will find if the reference exists in the list I am storing the references. The interviewer said that he needs a more optimized way to solve this problem. Can anyone please tell me what would be a more optimized method to solve this problem.

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  • What is the correct way to unit test areas around exceptions

    - by Codek
    Hi, Looking at our code coverage of our unit tests we're quite high. But the last few % is tricky because a lot of them are catching things like database exceptions - which in normal circumstances just dont happen. For example the code prevents fields being too long etc, so the only possible database exceptions are if the DB is broken/down, or if the schema is changed under our feet. So is the only way to Mock the objects such that the exception can be thrown? That seems a little bit pointless. Perhaps it's better to just accept not getting 100% code coverage? Thanks, Dan

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  • How do I load Formtastic to test it?

    - by Alan
    I am using Rails 2.0.2 and following Github installation instructions: 1. add as gem source ie "gem sources -a http://gemcutter.org/".....ok 2. install gem ie "gem install formtastic"....gives error, could not find formtastic locally or in a repository I am learning Ruby on Rails and have no knowledge of gems

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  • Test For CSS3 Radial Gradient Vendor Syntax

    - by Scott Christopherson
    I'm having an issue where I'm trying to update the background gradient of an element with JavaScript based on values I specify. I tried this route: elem.style.backgroundImage = '-webkit-gradient(radial, '+x+' '+y+', 0, '+x+' '+y+', 800, from(#ccc), to(#333)), -moz-radial-gradient('+x+'px '+y+'px, circle cover, #ccc 0, #333 100%)'; Since Webkit and Gecko have two different syntaxes for CSS3 gradients, I need to specify both. However, the above code doesn't work. It works if I only have just the Gecko syntax or just the Webkit syntax, not both. I think you can check for CSS gradient support, but my question is, is there a way to check which syntax needs to be used without browser sniffing? Keep in mind that I need to set my gradients this way since the x and y coordinates of the gradient change dynamically. Hope this makes sense, thanks.

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  • Selenium RC cannot test on compressed html

    - by JH
    In order to have the fast speed of website, the web sever compress (gzip) the html files before sending to our clients. When running selenium tests, it shows a pop-up saying: You have chosen to open ... which is a: Bin file from: http://... Would you like to save this file? "Cancel" "Save File" It seems that the compressed html file doesn't unzip and browsers recognise it as Binary file.

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  • Trying to test space in filesystem on Unix

    - by Buzkie
    I need to check if I Filesystem exists, and if it does exist there is 300 MB of space in it. What I have so far: if [ "$(df -m /opt/IBM | grep -vE '^Filesystem' | awk '{print ($3)}')" < "300" ] then echo "not enough space in the target filesystem" exit 1 fi This throws an error. I don't really know what I'm doing in shell. My highest priority is AIX but I'm trying to get it to work for HP and Sun too. Please help. -Alex

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  • How To Test if a Type is Anonymous?

    - by DaveDev
    Hi Guys I have the following method which serialises an object to a HTML tag. I only want to do this though if the type isn't Anonymous. private void MergeTypeDataToTag(object typeData) { if (typeData != null) { Type elementType = typeData.GetType(); if (/* elementType != AnonymousType */) { _tag.Attributes.Add("class", elementType.Name); } // do some more stuff } } Can somebody show me how to achieve this? Thanks Dave

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  • How to test css property in rspec?

    - by Senthil
    I'm using tabnav plugin for Rails and I want to use rpsec to make sure it highlights properly. describe 'account navigation links' do it 'should have account settings link' do get '/account/settings' response.should have_tag("li", :text => "Account Settings") end it 'should be highlighted' do get '/account/settings' response.should have_tag("li", :color => "Account Settings") end end However the above code doesn't seem to work. I'm using webrat with rspec btw. Any help? Thanks.

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  • How can I test potentially browser crashing javascript

    - by yaya3
    I've been having a crack at some of the problems over at http://projecteuler.net/ with JavaScript. I've been using a simple html page and running my code in script tags so I can log my results in the browsers' console. When experimenting with loops I sometimes cause the browser to crash. Is there a better environment for me to do this kind of development?

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  • Trying to test for OS and space in filesystem on AIX

    - by Buzkie
    I need to check if I Filesystem exists, and if it does exist there is 300 MB of space in it. What I have so far: if [ "$(df -m /opt/IBM | grep -vE '^Filesystem' | awk '{print ($3)}')" < "300" ] then echo "not enough space in the target filesystem" exit 1 fi This throws an error. I don't really know what I'm doing in shell. Please help. -Alex

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  • Configuring an offscreen framebuffer fails the completeness test

    - by randallmeadows
    I'm trying to create an offscreen framebuffer into which I can do some OpenGL drawing, and then pull the bits out manually. I'm following the instructions here, but in step 4, status is 0 instead of GL_FRAMEBUFFER_COMPLETE_OES. If I insert a call go glGetError() after every gl call, it returns 0 (GL_NO_ERROR) every time. But, the values of variables do not change during the call. E.g., GLuint framebuffer; glGenFramebuffersOES(1, &framebuffer); glBindFramebufferOES(GL_FRAMEBUFFER_OES, framebuffer); the value of framebuffer does not get altered at all (even when I change it to some arbitrary value and re-execute). It's almost like the gl calls are not actually being made. I'm linking against OpenGLES framework, and get no compile, link, or run-time errors (or warnings). I'm at a loss as to what to do to fix this. I've tried continuing on with my drawing, but do not see the results I expect, but at this point I can't tell whether it's because of the above error, or the conversion to a UIImage.

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  • Perform manual test, automate after - or never?

    - by dotnetdev
    In my current company, we have one tester. Having spoken to this tester, she says that in testing, before implementing any automation systems, the scripts (steps to take) are manually written and performed (performed at least once). Is this the way things work in testing? To make me laugh, this has been done in this case, yet no automation. It makes me laugh to see the lead tester perform loads of different combinations of usernames and passwords for a login form (which she is not overly keen on having automated) when I could easily automate that (but politics in the company won't allow that). This doesn't seem like the environment where a junior tester (not me, I'm a SDET) cannot learn anything. Thanks

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  • How to change the language of driver interface for Canon Pixma printers?

    - by Sammy
    Is there a way to change the language of the driver interface for Canon Pixma printers? Which language is used seems to be determined by the language of the OS or the Windows localization settings. I really don't want that, I want to be able to set the language manually to my own liking, either during the driver installation or afterwards. I have found a workaround for Pixma IP2770 where you edit the setup.ini file by replacing the language names and the DLL search paths with <SELECT> under the LANGUAGES section. So instead of... 0000=<SELECT> 0001=Arabic,RES\STRING\IJInstAR.ini,RES\DLL\IJInstAR.dll 0804=Simplified Chinese,RES\STRING\IJInstCN.ini,RES\DLL\IJInstCN.dll 0404=Traditional Chinese,RES\STRING\IJInstTW.ini,RES\DLL\IJInstTW.dll 0005=Czech,RES\STRING\IJInstCZ.ini,RES\DLL\IJInstCZ.dll 0006=Danish,RES\STRING\IJInstDK.ini,RES\DLL\IJInstDK.dll 0007=German,RES\STRING\IJInstDE.ini,RES\DLL\IJInstDE.dll 0008=Greek,RES\STRING\IJInstGR.ini,RES\DLL\IJInstGR.dll 0009=English,RES\STRING\IJInstUS.ini,RES\DLL\IJInstUS.dll 000A=Spanish,RES\STRING\IJInstES.ini,RES\DLL\IJInstES.dll 000B=Finnish,RES\STRING\IJInstFI.ini,RES\DLL\IJInstFI.dll 000C=French,RES\STRING\IJInstFR.ini,RES\DLL\IJInstFR.dll 000E=Hungarian,RES\STRING\IJInstHU.ini,RES\DLL\IJInstHU.dll 0010=Italian,RES\STRING\IJInstIT.ini,RES\DLL\IJInstIT.dll 0011=Japanese,RES\STRING\IJInstJP.ini,RES\DLL\IJInstJP.dll 0012=Korean,RES\STRING\IJInstKR.ini,RES\DLL\IJInstKR.dll 0013=Dutch,RES\STRING\IJInstNL.ini,RES\DLL\IJInstNL.dll 0014=Norwegian,RES\STRING\IJInstNO.ini,RES\DLL\IJInstNO.dll 0015=Polish,RES\STRING\IJInstPL.ini,RES\DLL\IJInstPL.dll 0016=Portuguese,RES\STRING\IJInstPT.ini,RES\DLL\IJInstPT.dll 0019=Russian,RES\STRING\IJInstRU.ini,RES\DLL\IJInstRU.dll 001D=Swedish,RES\STRING\IJInstSE.ini,RES\DLL\IJInstSE.dll 001E=Thai,RES\STRING\IJInstTH.ini,RES\DLL\IJInstTH.dll 001F=Turkish,RES\STRING\IJInstTR.ini,RES\DLL\IJInstTR.dll 0021=Indonesian,RES\STRING\IJInstID.ini,RES\DLL\IJInstID.dll You get.... 0000=<SELECT> 0001=<SELECT> 0804=<SELECT> 0404=<SELECT> 0005=<SELECT> 0006=<SELECT> 0007=<SELECT> 0008=<SELECT> 0009=English,RES\STRING\IJInstUS.ini,RES\DLL\IJInstUS.dll 000A=<SELECT> 000B=<SELECT> 000C=<SELECT> 000E=<SELECT> 0010=<SELECT> 0011=<SELECT> 0012=<SELECT> 0013=<SELECT> 0014=<SELECT> 0015=<SELECT> 0016=<SELECT> 0019=<SELECT> 001D=<SELECT> 001E=<SELECT> 001F=<SELECT> 0021=<SELECT> .... in case English is the preferred language. It's a way to force the installation program to only install the English language support. IP2770 is a model for the Asian market, so if you want to check this out you need to go to the Canon India download page (for instance) to get the driver. Unfortunately this method is not possible with my IP4000. There is no driver even available for it to download for Windows Vista. But is there really no way of changing the language of the UI in any normal way, you know... without having to hack it? Besides, the driver for my printer comes with Windows Vista, so I don't even have to install any drivers. And little do I get the chance to set the language, knowing that the installation never happens. Any ideas?...

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  • Difficulty to start up with basic unit test (Sample from my book -- SportsStore)

    - by Richard77
    Hello, I'm really new in TDD and, actually, I'm trying to follow the sample from my book (SportsStore -- Pro ASP.NET MVC Framework/Steve Sanderson/APRESS). I'm on pages 103-105. Although there are more on this, as new to all of this, I'm concerned with the following statements. ProductsController controller = new ProductsController(repository); var result = controller.List(2); //... regarding the above statements, when I write this (as in the book), var products = result.ViewData.Model as IList<Product>; I get a compiler error "System.Web.MVC.ActionResult" does not contain a definition for ViewData ..." But, when I remove the List() from the statement, then the compiler error disapear. var result = controller.List(2);//Doesn't work var result = controller;//It works Is something wrong there? I checked Apress website for that book, but there is nothing listed as Errata or issue. So I'm really lost. Thanks for helping

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  • How to assert/unit-test servers JSON response?

    - by shazax
    My current project uses JSON as data interchange format. Both Front-end and Back-end team agree upon a JSON structure before start integrating a service. At times due to un-notified changes in JSON structure by back-end team; it breaks the front-end code. Is there any external library that we could use to compare a mock JSON (fixture) with servers JSON response. Basically it should assert the whole JSON object and should throw an error if there is any violation in servers JSON format. Additional info: App is built on JQuery consuming REST JSON services.

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