tests: assert pathname and flags when calling open()

With this change the wrappers for mock and friends are able to take an
optional io_mock_fallback_open_state struct to assert expected pathnames
and flags whenever an open operation is called.

Based partially on https://review.coreboot.org/c/flashrom/+/62319/5

BUG=b:227404721,b:217629892,b:215255210
TEST=./test_build.sh; FEATURES=test emerge-amd64-generic flashrom
BRANCH=none

Signed-off-by: Daniel Campello <campello@chromium.org>
Co-Author: Edward O'Callaghan <quasisec@google.com>
Change-Id: Ib46ca5b854c8453ec02ae09f3151cd4d25f988eb
Reviewed-on: https://review.coreboot.org/c/flashrom/+/63227
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>

1 files changed, 23 insertions, 8 deletions

diff --git a/tests/tests.c b/tests/tests.c
index f32c14da..3eef47e4 100644
--- a/tests/tests.c
+++ b/tests/tests.c
@@ -74,28 +74,43 @@ uint8_t __wrap_sio_read(uint16_t port, uint8_t reg)
 	return (uint8_t)mock();
 }
 
-int __wrap_open(const char *pathname, int flags)
+static int mock_open(const char *pathname, int flags)
 {
-	LOG_ME;
 	if (get_io() && get_io()->open)
 		return get_io()->open(get_io()->state, pathname, flags);
+
+	if (get_io() && get_io()->fallback_open_state) {
+		struct io_mock_fallback_open_state *io_state;
+		unsigned int open_state_flags;
+
+		io_state = get_io()->fallback_open_state;
+		assert_true(io_state->noc < MAX_MOCK_OPEN);
+		assert_non_null(io_state->paths[io_state->noc]);
+		assert_string_equal(pathname, io_state->paths[io_state->noc]);
+		open_state_flags = io_state->flags[io_state->noc];
+		assert_int_equal(flags & open_state_flags, open_state_flags);
+		io_state->noc++; // proceed to the next path upon next call.
+	}
+
 	return MOCK_FD;
 }
 
+int __wrap_open(const char *pathname, int flags)
+{
+	LOG_ME;
+	return mock_open(pathname, flags);
+}
+
 int __wrap_open64(const char *pathname, int flags)
 {
 	LOG_ME;
-	if (get_io() && get_io()->open)
-		return get_io()->open(get_io()->state, pathname, flags);
-	return MOCK_FD;
+	return mock_open(pathname, flags);
 }
 
 int __wrap___open64_2(const char *pathname, int flags)
 {
 	LOG_ME;
-	if (get_io() && get_io()->open)
-		return get_io()->open(get_io()->state, pathname, flags);
-	return MOCK_FD;
+	return mock_open(pathname, flags);
 }
 
 int __wrap_ioctl(int fd, unsigned long int request, ...)