Comments on: Testing file system operations http://www.markhneedham.com/blog/2008/09/17/testing-file-system-operations/ Thoughts on Software Development Sat, 11 Feb 2012 23:17:00 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Laurie http://www.markhneedham.com/blog/2008/09/17/testing-file-system-operations/comment-page-1/#comment-38398 Laurie Thu, 03 Jun 2010 06:49:01 +0000 http://www.markhneedham.com/blog/?p=339#comment-38398 Thanks! This is helpful information and quite clear. Thanks! This is helpful information and quite clear.

]]> By: Bernd Eckenfels http://www.markhneedham.com/blog/2008/09/17/testing-file-system-operations/comment-page-1/#comment-345 Bernd Eckenfels Wed, 17 Sep 2008 18:43:10 +0000 http://www.markhneedham.com/blog/?p=339#comment-345 There is some testing needed in this area which is even more complicated. For example, if you close a file but forget to fdsync() it, it wont be transaction safe. If you then rename it afterwards, you could easyly get 0-size files or files filled with 0-byte chunks. All that is quite platform specific and hard to test. One thing you can do us to use syscall tracers to find those suspicious patterns "all files in conf/ must be created with temporary names and synced before renamed". Thats eighter functional testing, or special hooks in unit tests (for example AOP or own security manager). It could also be done on a shim layer, but then you havent checked the whole implementation stack. Bernd There is some testing needed in this area which is even more complicated. For example, if you close a file but forget to fdsync() it, it wont be transaction safe. If you then rename it afterwards, you could easyly get 0-size files or files filled with 0-byte chunks. All that is quite platform specific and hard to test.

One thing you can do us to use syscall tracers to find those suspicious patterns “all files in conf/ must be created with temporary names and synced before renamed”. Thats eighter functional testing, or special hooks in unit tests (for example AOP or own security manager). It could also be done on a shim layer, but then you havent checked the whole implementation stack.

Bernd

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