tests: Add wrap for libusb_init and use it in dediprog test

Missing wrap for libusb_init has been discovered while working
on the test for raiden_debug_spi. Both dediprog (existing test) and
raiden_debug_spi (new test, see later in this chain) are using
libusb_init, so it definitely needs to be wrapped and added to io_mock.

Why tests worked before, without the wrap: my understanding is that
real libusb_init was called for dediprog test? Given that tests
definitely should not call any real libusb functions, wrap is needed.

BUG=b:181803212
TEST=builds and ninja test

Change-Id: I51c9cb96db1afb3298f4d098df96509d3cb3c046
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/57917
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

tests/init_shutdown.c

@@ -54,6 +54,13 @@ void nicrealtek_init_and_shutdown_test_success(void **state)
 #endif
 }
 
+
+int dediprog_libusb_init(void *state, libusb_context **ctx)
+{
+	*ctx = not_null();
+	return 0;
+}
+
 int dediprog_libusb_control_transfer(void *state,
 					libusb_device_handle *devh,
 					uint8_t bmRequestType,
@@ -75,6 +82,7 @@ void dediprog_init_and_shutdown_test_success(void **state)
 {
 #if CONFIG_DEDIPROG == 1
 	const struct io_mock dediprog_io = {
+		.libusb_init = dediprog_libusb_init,
 		.libusb_control_transfer = dediprog_libusb_control_transfer,
 	};
 

tests/io_mock.h

@@ -70,6 +70,7 @@ struct io_mock {
 	unsigned int (*inl)(void *state, unsigned short port);
 
 	/* USB I/O */
+	int (*libusb_init)(void *state, libusb_context **ctx);
 	int (*libusb_control_transfer)(void *state,
 					libusb_device_handle *devh,
 					uint8_t bmRequestType,

tests/libusb_wraps.c

@@ -23,6 +23,14 @@ void *__wrap_usb_dev_get_by_vid_pid_number(
 	return not_null();
 }
 
+int __wrap_libusb_init(libusb_context **ctx)
+{
+	LOG_ME;
+	if (get_io() && get_io()->libusb_init)
+		return get_io()->libusb_init(get_io()->state, ctx);
+	return 0;
+}
+
 int __wrap_libusb_set_configuration(libusb_device_handle *devh, int config)
 {
 	LOG_ME;

tests/meson.build

@@ -64,6 +64,7 @@ mocks = [
   '-Wl,--wrap=test_outl',
   '-Wl,--wrap=test_inl',
   '-Wl,--wrap=usb_dev_get_by_vid_pid_number',
+  '-Wl,--wrap=libusb_init',
   '-Wl,--wrap=libusb_set_configuration',
   '-Wl,--wrap=libusb_claim_interface',
   '-Wl,--wrap=libusb_control_transfer',