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AT_BANNER([test dir_name function])
m4_define([CHECK_DIR_NAME],
[AT_SETUP([dir_name("$1") returns "$2"])
AT_KEYWORDS([dir_name])
AT_CHECK([test-dir_name "AS_ESCAPE($1)"], [0], [$2
])
AT_CLEANUP])
# These are the test cases given in POSIX for dirname().
CHECK_DIR_NAME([/usr/lib], [/usr])
CHECK_DIR_NAME([/usr/], [/])
CHECK_DIR_NAME([usr], [.])
CHECK_DIR_NAME([/], [/])
CHECK_DIR_NAME([.], [.])
CHECK_DIR_NAME([..], [.])
CHECK_DIR_NAME([//], [//]) # / is also allowed
CHECK_DIR_NAME([//foo], [//]) # / is also allowed
CHECK_DIR_NAME([], [.])
# Additional test cases.
CHECK_DIR_NAME([dir/file], [dir])
CHECK_DIR_NAME([dir/file/], [dir])
CHECK_DIR_NAME([dir/file//], [dir])
CHECK_DIR_NAME([///foo], [/])
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