[libgpiod][PATCH 09/16] tests: add a helper for reading back line settings from line config

[Bartosz Golaszewski <brgl@bgdev.pl>]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Add a helper for getting line settings from line config that allows to
shrink the test code a bit.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 tests/gpiod-test-helpers.h | 10 ++++++++++
 tests/tests-line-config.c  | 13 ++++---------
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/tests/gpiod-test-helpers.h b/tests/gpiod-test-helpers.h
index b40b820..fb3fd7d 100644
--- a/tests/gpiod-test-helpers.h
+++ b/tests/gpiod-test-helpers.h
@@ -126,6 +126,16 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(struct_gpiod_edge_event_buffer,
 		gpiod_test_return_if_failed(); \
 	} while (0)
 
+#define gpiod_test_line_config_get_line_settings_or_fail(_line_cfg, _offset) \
+	({ \
+		struct gpiod_line_settings *_settings = \
+			gpiod_line_config_get_line_settings(_line_cfg, \
+							    _offset); \
+		g_assert_nonnull(_settings); \
+		gpiod_test_return_if_failed(); \
+		_settings; \
+	})
+
 #define gpiod_test_create_request_config_or_fail() \
 	({ \
 		struct gpiod_request_config *_config = \
diff --git a/tests/tests-line-config.c b/tests/tests-line-config.c
index ef85c3a..7f5e4b1 100644
--- a/tests/tests-line-config.c
+++ b/tests/tests-line-config.c
@@ -46,9 +46,7 @@ GPIOD_TEST_CASE(get_line_settings)
 	gpiod_test_line_config_add_line_settings_or_fail(config, offsets, 4,
 							 settings);
 
-	retrieved = gpiod_line_config_get_line_settings(config, 2);
-	g_assert_nonnull(retrieved);
-	gpiod_test_return_if_failed();
+	retrieved = gpiod_test_line_config_get_line_settings_or_fail(config, 2);
 
 	g_assert_cmpint(gpiod_line_settings_get_direction(settings), ==,
 			GPIOD_LINE_DIRECTION_INPUT);
@@ -146,9 +144,7 @@ GPIOD_TEST_CASE(null_settings)
 	gpiod_test_line_config_add_line_settings_or_fail(config, offsets, 4,
 							 NULL);
 
-	settings = gpiod_line_config_get_line_settings(config, 2);
-	g_assert_nonnull(settings);
-	gpiod_test_return_if_failed();
+	settings = gpiod_test_line_config_get_line_settings_or_fail(config, 2);
 
 	g_assert_cmpint(gpiod_line_settings_get_drive(settings), ==,
 			GPIOD_LINE_DIRECTION_AS_IS);
@@ -171,9 +167,8 @@ GPIOD_TEST_CASE(reset_config)
 	gpiod_test_line_config_add_line_settings_or_fail(config, offsets, 4,
 							 settings);
 
-	retrieved0 = gpiod_line_config_get_line_settings(config, 2);
-	g_assert_nonnull(retrieved0);
-	gpiod_test_return_if_failed();
+	retrieved0 = gpiod_test_line_config_get_line_settings_or_fail(config,
+								      2);
 
 	g_assert_cmpint(gpiod_line_settings_get_direction(retrieved0), ==,
 			GPIOD_LINE_DIRECTION_INPUT);
-- 
2.37.2