tests: add a test case for gpiod_line_direction()

Verify that the direction is changed properly and that a correct value
is returned from gpiod_line_direction().

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>

diff --git a/tests/unit/tests-line.c b/tests/unit/tests-line.c
index 71b1c7b7c02edc77c8d3eb335ec1873ad7cfd297..0678939021c34a15963315c8e9d763d2010da099 100644 (file)
--- a/tests/unit/tests-line.c
+++ b/tests/unit/tests-line.c
@@ -264,3 +264,31 @@ static void line_find_by_name_good(void)
 GU_DEFINE_TEST(line_find_by_name_good,
               "gpiod_line_find_by_name() - good",
               GU_LINES_NAMED, { 16, 16, 32, 16 });
+
+static void line_direction(void)
+{
+       GU_CLEANUP(gu_close_chip) struct gpiod_chip *chip = NULL;
+       struct gpiod_line *line;
+       int status;
+
+       chip = gpiod_chip_open(gu_chip_path(0));
+       GU_ASSERT_NOT_NULL(chip);
+
+       line = gpiod_chip_get_line(chip, 5);
+       GU_ASSERT_NOT_NULL(line);
+
+       status = gpiod_line_request_output(line, "gpiod-unit", false, 0);
+       GU_ASSERT_RET_OK(status);
+
+       GU_ASSERT_EQ(gpiod_line_direction(line), GPIOD_DIRECTION_OUTPUT);
+
+       gpiod_line_release(line);
+
+       status = gpiod_line_request_input(line, "gpiod-unit", false);
+       GU_ASSERT_RET_OK(status);
+
+       GU_ASSERT_EQ(gpiod_line_direction(line), GPIOD_DIRECTION_INPUT);
+}
+GU_DEFINE_TEST(line_direction,
+              "gpiod_line_direction() - set & get",
+              GU_LINES_UNNAMED, { 8 });