tests: event: extend test coverage for reading multiple line events at once

Add test cases for new helpers allowing users to read multiple events
at once.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/tests/tests-event.c b/tests/tests-event.c
index d425d1a505a4ff39ad49a3ce6b3903568cf32c5d..b59c995e057b23ac749f65fb8bfe2a558f5da43e 100644 (file)
--- a/tests/tests-event.c
+++ b/tests/tests-event.c
@@ -552,3 +552,92 @@ GPIOD_TEST_CASE(invalid_fd, 0, { 8 })
        g_assert_cmpint(ret, ==, -1);
        g_assert_cmpint(errno, ==, EINVAL);
 }
+
+GPIOD_TEST_CASE(read_multiple_events, 0, { 8 })
+{
+       g_autoptr(gpiod_chip_struct) chip = NULL;
+       struct gpiod_line_event events[3];
+       struct timespec ts = { 1, 0 };
+       struct gpiod_line *line;
+       gint ret;
+
+       chip = gpiod_chip_open(gpiod_test_chip_path(0));
+       g_assert_nonnull(chip);
+       gpiod_test_return_if_failed();
+
+       line = gpiod_chip_get_line(chip, 4);
+       g_assert_nonnull(line);
+       gpiod_test_return_if_failed();
+
+       ret = gpiod_line_request_both_edges_events(line, GPIOD_TEST_CONSUMER);
+       g_assert_cmpint(ret, ==, 0);
+
+       gpiod_test_chip_set_pull(0, 4, 1);
+       /*
+        * We sleep for a short period of time here and in other test cases
+        * for multiple events to let the kernel service each simulated
+        * interrupt. Otherwise we'd risk triggering an interrupt while the
+        * previous one is still being handled.
+        */
+       usleep(10000);
+       gpiod_test_chip_set_pull(0, 4, 0);
+       usleep(10000);
+       gpiod_test_chip_set_pull(0, 4, 1);
+       usleep(10000);
+
+       ret = gpiod_line_event_wait(line, &ts);
+       g_assert_cmpint(ret, ==, 1);
+
+       ret = gpiod_line_event_read_multiple(line, events, 3);
+       g_assert_cmpint(ret, ==, 3);
+
+       g_assert_cmpint(events[0].event_type, ==,
+                       GPIOD_LINE_EVENT_RISING_EDGE);
+       g_assert_cmpint(events[1].event_type, ==,
+                       GPIOD_LINE_EVENT_FALLING_EDGE);
+       g_assert_cmpint(events[2].event_type, ==,
+                       GPIOD_LINE_EVENT_RISING_EDGE);
+}
+
+GPIOD_TEST_CASE(read_multiple_events_fd, 0, { 8 })
+{
+       g_autoptr(gpiod_chip_struct) chip = NULL;
+       struct gpiod_line_event events[3];
+       struct timespec ts = { 1, 0 };
+       struct gpiod_line *line;
+       gint ret, fd;
+
+       chip = gpiod_chip_open(gpiod_test_chip_path(0));
+       g_assert_nonnull(chip);
+       gpiod_test_return_if_failed();
+
+       line = gpiod_chip_get_line(chip, 4);
+       g_assert_nonnull(line);
+       gpiod_test_return_if_failed();
+
+       ret = gpiod_line_request_both_edges_events(line, GPIOD_TEST_CONSUMER);
+       g_assert_cmpint(ret, ==, 0);
+
+       gpiod_test_chip_set_pull(0, 4, 1);
+       usleep(10000);
+       gpiod_test_chip_set_pull(0, 4, 0);
+       usleep(10000);
+       gpiod_test_chip_set_pull(0, 4, 1);
+       usleep(10000);
+
+       ret = gpiod_line_event_wait(line, &ts);
+       g_assert_cmpint(ret, ==, 1);
+
+       fd = gpiod_line_event_get_fd(line);
+       g_assert_cmpint(fd, >=, 0);
+
+       ret = gpiod_line_event_read_fd_multiple(fd, events, 3);
+       g_assert_cmpint(ret, ==, 3);
+
+       g_assert_cmpint(events[0].event_type, ==,
+                       GPIOD_LINE_EVENT_RISING_EDGE);
+       g_assert_cmpint(events[1].event_type, ==,
+                       GPIOD_LINE_EVENT_FALLING_EDGE);
+       g_assert_cmpint(events[2].event_type, ==,
+                       GPIOD_LINE_EVENT_RISING_EDGE);
+}