t/helper: merge test-subprocess into test-tool

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Makefile b/Makefile
index c1dc9ff..893ea64 100644
--- a/Makefile
+++ b/Makefile
@@ -683,6 +683,7 @@
 TEST_BUILTINS_OBJS += test-strcmp-offset.o
 TEST_BUILTINS_OBJS += test-string-list.o
 TEST_BUILTINS_OBJS += test-submodule-config.o
+TEST_BUILTINS_OBJS += test-subprocess.o
 
 TEST_PROGRAMS_NEED_X += test-dump-fsmonitor
 TEST_PROGRAMS_NEED_X += test-dump-untracked-cache
@@ -690,7 +691,6 @@
 TEST_PROGRAMS_NEED_X += test-line-buffer
 TEST_PROGRAMS_NEED_X += test-parse-options
 TEST_PROGRAMS_NEED_X += test-write-cache
-TEST_PROGRAMS_NEED_X += test-subprocess
 TEST_PROGRAMS_NEED_X += test-svn-fe
 TEST_PROGRAMS_NEED_X += test-tool
 TEST_PROGRAMS_NEED_X += test-urlmatch-normalization
diff --git a/t/helper/test-subprocess.c b/t/helper/test-subprocess.c
index 30c5765..92b69de 100644
--- a/t/helper/test-subprocess.c
+++ b/t/helper/test-subprocess.c
@@ -1,7 +1,8 @@
+#include "test-tool.h"
 #include "cache.h"
 #include "run-command.h"
 
-int cmd_main(int argc, const char **argv)
+int cmd__subprocess(int argc, const char **argv)
 {
 	struct child_process cp = CHILD_PROCESS_INIT;
 	int nogit = 0;
diff --git a/t/helper/test-tool.c b/t/helper/test-tool.c
index 36b441a..d10fad1 100644
--- a/t/helper/test-tool.c
+++ b/t/helper/test-tool.c
@@ -38,6 +38,7 @@ static struct test_cmd cmds[] = {
 	{ "strcmp-offset", cmd__strcmp_offset },
 	{ "string-list", cmd__string_list },
 	{ "submodule-config", cmd__submodule_config },
+	{ "subprocess", cmd__subprocess },
 };
 
 int cmd_main(int argc, const char **argv)
diff --git a/t/helper/test-tool.h b/t/helper/test-tool.h
index be7e797..a611801 100644
--- a/t/helper/test-tool.h
+++ b/t/helper/test-tool.h
@@ -32,5 +32,6 @@ int cmd__sigchain(int argc, const char **argv);
 int cmd__strcmp_offset(int argc, const char **argv);
 int cmd__string_list(int argc, const char **argv);
 int cmd__submodule_config(int argc, const char **argv);
+int cmd__subprocess(int argc, const char **argv);
 
 #endif
diff --git a/t/t1501-work-tree.sh b/t/t1501-work-tree.sh
index b07cb91..02cf201 100755
--- a/t/t1501-work-tree.sh
+++ b/t/t1501-work-tree.sh
@@ -341,7 +341,7 @@
 
 test_expect_success 'relative $GIT_WORK_TREE and git subprocesses' '
 	GIT_DIR=repo.git GIT_WORK_TREE=repo.git/work \
-	test-subprocess --setup-work-tree rev-parse --show-toplevel >actual &&
+	test-tool subprocess --setup-work-tree rev-parse --show-toplevel >actual &&
 	echo "$(pwd)/repo.git/work" >expected &&
 	test_cmp expected actual
 '