t/helper: merge (unused) test-mergesort into test-tool

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -666,13 +666,13 @@ TEST_BUILTINS_OBJS += test-hashmap.o
 TEST_BUILTINS_OBJS += test-index-version.o
 TEST_BUILTINS_OBJS += test-lazy-init-name-hash.o
 TEST_BUILTINS_OBJS += test-match-trees.o
+TEST_BUILTINS_OBJS += test-mergesort.o
 TEST_BUILTINS_OBJS += test-sha1.o
 
 TEST_PROGRAMS_NEED_X += test-dump-fsmonitor
 TEST_PROGRAMS_NEED_X += test-dump-untracked-cache
 TEST_PROGRAMS_NEED_X += test-fake-ssh
 TEST_PROGRAMS_NEED_X += test-line-buffer
-TEST_PROGRAMS_NEED_X += test-mergesort
 TEST_PROGRAMS_NEED_X += test-mktemp
 TEST_PROGRAMS_NEED_X += test-online-cpus
 TEST_PROGRAMS_NEED_X += test-parse-options

t/helper/test-mergesort.c

@@ -1,3 +1,4 @@
+#include "test-tool.h"
 #include "cache.h"
 #include "mergesort.h"
 
@@ -22,7 +23,7 @@ static int compare_strings(const void *a, const void *b)
 	return strcmp(x->text, y->text);
 }
 
-int cmd_main(int argc, const char **argv)
+int cmd__mergesort(int argc, const char **argv)
 {
 	struct line *line, *p = NULL, *lines = NULL;
 	struct strbuf sb = STRBUF_INIT;

t/helper/test-tool.c

@@ -21,6 +21,7 @@ static struct test_cmd cmds[] = {
 	{ "index-version", cmd__index_version },
 	{ "lazy-init-name-hash", cmd__lazy_init_name_hash },
 	{ "match-trees", cmd__match_trees },
+	{ "mergesort", cmd__mergesort },
 	{ "sha1", cmd__sha1 },
 };
 

t/helper/test-tool.h

@@ -15,6 +15,7 @@ int cmd__hashmap(int argc, const char **argv);
 int cmd__index_version(int argc, const char **argv);
 int cmd__lazy_init_name_hash(int argc, const char **argv);
 int cmd__match_trees(int argc, const char **argv);
+int cmd__mergesort(int argc, const char **argv);
 int cmd__sha1(int argc, const char **argv);
 
 #endif