+Run the test like this (expect no output):
+ gcc -DHAVE_CONFIG_H -DTEST_DIRNAME -I.. -O -Wall \
+ basename.c dirname.c xmalloc.c error.c
+ sed -n '/^BEGIN-DATA$/,/^END-DATA$/p' dirname.c|grep -v DATA|./a.out
+
+If it's been built on a DOS or Windows platforms, run another test like
+this (again, expect no output):
+ sed -n '/^BEGIN-DOS-DATA$/,/^END-DOS-DATA$/p' dirname.c|grep -v DATA|./a.out
+
+BEGIN-DATA
+foo//// .
+bar/foo//// bar
+foo/ .
+/ /
+. .
+a .
+END-DATA
+
+BEGIN-DOS-DATA
+c:///// c:/
+c:/ c:/
+c:/. c:/
+c:foo c:.
+c:foo/bar c:foo
+END-DOS-DATA
+
+*/
+
+# define MAX_BUFF_LEN 1024
+# include <stdio.h>
+
+char *program_name;
+
+int
+main (int argc, char *argv[])
+{
+ char buff[MAX_BUFF_LEN + 1];
+
+ program_name = argv[0];
+
+ buff[MAX_BUFF_LEN] = 0;
+ while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
+ {
+ char path[MAX_BUFF_LEN];
+ char expected_result[MAX_BUFF_LEN];
+ char const *result;
+ sscanf (buff, "%s %s", path, expected_result);
+ result = dir_name (path);
+ if (strcmp (result, expected_result))
+ printf ("%s: got %s, expected %s\n", path, result, expected_result);