unit tests for my_getopt

unittest/mysys/CMakeLists.txt

@@ -14,6 +14,7 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 
 MY_ADD_TESTS(bitmap base64 my_vsnprintf my_atomic my_rdtsc lf my_malloc
+             my_getopt
              LINK_LIBRARIES mysys)
 
 IF(WIN32)

unittest/mysys/my_getopt-t.c

@@ -0,0 +1,71 @@
+/* Copyright (C) 2015 MariaDB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
+
+#include <tap.h>
+#include <my_getopt.h>
+#include <stdarg.h>
+
+ulonglong opt_ull;
+ulong opt_ul;
+int argc, res;
+char **argv, *args[100];
+
+struct my_option my_long_options[]=
+{
+  {"ull", 0, "ull", &opt_ull, &opt_ull,
+   0, GET_ULL, REQUIRED_ARG, 1, 0, ~0ULL, 0, 0, 0},
+  {"ul", 0, "ul", &opt_ul, &opt_ul,
+   0, GET_ULONG, REQUIRED_ARG, 1, 0, 0xFFFFFFFF, 0, 0, 0},
+  {0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
+};
+
+void run(const char *arg, ...)
+{
+  va_list ap;
+  va_start(ap, arg);
+  argv= args;
+  *argv++= (char*)"<skipped>";
+  while (arg)
+  {
+    *argv++= (char*)arg;
+    arg= va_arg(ap, char*);
+  }
+  va_end(ap);
+  argc= argv - args;
+  argv= args;
+  res= handle_options(&argc, &argv, my_long_options, 0);
+}
+
+int main() {
+  plan(3);
+
+  run("--ull=100", NULL);
+  ok(res==0 && argc==0 && opt_ull==100,
+     "res:%d, argc:%d, opt_ull:%llu", res, argc, opt_ull);
+
+  /*
+    negative numbers are wrapped. this is kinda questionable,
+    we might want to fix it eventually. but it'd be a change in behavior,
+    users might've got used to "-1" meaning "max possible value"
+  */
+  run("--ull=-100", NULL);
+  ok(res==0 && argc==0 && opt_ull==18446744073709551516ULL,
+     "res:%d, argc:%d, opt_ull:%llu", res, argc, opt_ull);
+  run("--ul=-100", NULL);
+  ok(res==0 && argc==0 && opt_ul==4294967295UL,
+     "res:%d, argc:%d, opt_ul:%lu", res, argc, opt_ul);
+  return exit_status();
+}
+