Merge branch 'nd/test-helpers' into maint

Update to the test framework made in 2.9 timeframe broke running
the tests under valgrind, which has been fixed.

* nd/test-helpers:
  valgrind: support test helpers

t/test-lib.sh

@@ -809,7 +809,14 @@ then
 		return;
 
 		base=$(basename "$1")
-		symlink_target=$GIT_BUILD_DIR/$base
+		case "$base" in
+		test-*)
+			symlink_target="$GIT_BUILD_DIR/t/helper/$base"
+			;;
+		*)
+			symlink_target="$GIT_BUILD_DIR/$base"
+			;;
+		esac
 		# do not override scripts
 		if test -x "$symlink_target" &&
 		    test ! -d "$symlink_target" &&

t/valgrind/valgrind.sh

@@ -1,11 +1,19 @@
 #!/bin/sh
 
 base=$(basename "$0")
+case "$base" in
+test-*)
+	program="$GIT_VALGRIND/../../t/helper/$base"
+	;;
+*)
+	program="$GIT_VALGRIND/../../$base"
+	;;
+esac
 
 TOOL_OPTIONS='--leak-check=no'
 
 test -z "$GIT_VALGRIND_ENABLED" &&
-exec "$GIT_VALGRIND"/../../"$base" "$@"
+exec "$program" "$@"
 
 case "$GIT_VALGRIND_MODE" in
 memcheck-fast)
@@ -29,4 +37,4 @@ exec valgrind -q --error-exitcode=126 \
 	--log-fd=4 \
 	--input-fd=4 \
 	$GIT_VALGRIND_OPTIONS \
-	"$GIT_VALGRIND"/../../"$base" "$@"
+	"$program" "$@"