tests: Move current_io to io_mock.c be visible across tests

tests.c is growing and needs to be split, specifically all
libusb wraps need to be extracted into their own file. See later
in the chain a lot more wraps are added for libusb functions. To
be able to split it, current_io needs to be moved one level up,
to be visible across tests. This allows having multiple files with
wraps, and all the wraps can use current_io.

BUG=b:181803212
TEST=builds and ninja test

Change-Id: I5327b5de430afe13a8cc931c8b4b188dcb8c8cf6
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/57915
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/io_mock.c b/tests/io_mock.c
new file mode 100644
index 00000000..51dde927
--- /dev/null
+++ b/tests/io_mock.c
@@ -0,0 +1,29 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2021, Google Inc. All rights reserved.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include "io_mock.h"
+
+static const struct io_mock *current_io = NULL;
+
+void io_mock_register(const struct io_mock *io)
+{
+	current_io = io;
+}
+
+const struct io_mock *get_io(void)
+{
+	return current_io;
+}