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mixed case in File fullPaths can cause class indexing to start too high
Using OpenCover 22.214.171.124 and ReportGenerator 4.0.804 to report my test coverage the report generation started taking figuratively forever. Investigating, I saw something likefound report files: D:/sandbox/project/src/buildlogs/temp_test_coverage/Project.UnitTest.coverage.xmlLoading
report 'D:\sandbox\project\src\buildlogs\temp_test_coverage\Project.UnitTest.coverage.xml' Preprocessing report Indexing classes in directory 'D:\sandbox\project\src\Module1\SubPath\' Added coverage information of 370/370 auto properties to module 'Module1'
Indexing classes in directory 'D:\'My D: drive isn't the hugest, but it's big enough, so that explained the delay. And of course, I certainly didn't want anything above D:\sandbox\project\src indexed. I took a peek at my .coverage.xml file and the ReportGenerator
code and until I found the offending lines.All but one of my File nodes had a fullPath starting with "D:\sandbox" except one, which had "D:\Sandbox". Because "S" isn't "s", CommonDirectorySearcher.GetCommonDirectory
thinks the longest common prefix is "D:\" and searches the drive.I was able to reproduce using the attached unit test added to CommonDirectorySearcherTest.It appears to be fixed by using StringComparison.OrdinalIgnoreCase when checking prefixes in
CommonDirectorySearcher.GetCommonDirectory.I worried a little about this not being sophisticated enough, in case we were working on a UNIX filesystem where case is significant (for example), but the code around these lines seemed to assume Windows (assuming
"\"s between path components), so I figured I'd see what you think.Thanks, Blair