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32a9b88b20
Add testcase for function g_file_query_filesystem_info() reporting outdated info for "filesystem::readonly" attribute when said attribute was different in a previous mounted partition in the same device (as GIO maintains a mounts cache per 'st_dev' stat() member). To trigger a mount operation, testcase uses program 'bindfs' instead of 'mount --bind' as bindfs does not require root privileges. And 'fusermount -u' command is used to unmount said bindfs mount. As a reference in Fedora, 'bindfs' is installed from 'bindfs' package and 'fusermount' from 'fuse' package (this one is installed by default as being part of 'System Tools' group). The test creates a directory with a file in it, then mounts it readonly over another directory (the mountpoint), it then checks that g_file_query_filesystem_info() for the file in it indeed reports "filesystem::readonly" as TRUE. Then unmounts and mounts again this time rw (not readonly), it then checks again if g_file_query_filesystem_info() is reporting "filesystem::readonly" as TRUE, if that's the case, it confirms the bug by opening said file in write mode. Testcase is only added for Unix builds. https://bugzilla.gnome.org/show_bug.cgi?id=787731