test: Convert to pragma once

Remove the verbose #ifndef/#define/#endif pattern for maintaining
header idempotency, and replace it with a simple #pragma once.

This simplifies the headers, and prevents redundant changes when
header files get moved.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>

test/libtest/buffer_source.h

@@ -4,8 +4,8 @@
  *
  * buffer_source.h - libcamera camera test helper to create FrameBuffers
  */
-#ifndef __LIBCAMERA_BUFFER_SOURCE_TEST_H__
-#define __LIBCAMERA_BUFFER_SOURCE_TEST_H__
+
+#pragma once
 
 #include <libcamera/stream.h>
 
@@ -25,5 +25,3 @@ private:
 	std::shared_ptr<libcamera::MediaDevice> media_;
 	std::vector<std::unique_ptr<libcamera::FrameBuffer>> buffers_;
 };
-
-#endif /* __LIBCAMERA_BUFFER_SOURCE_TEST_H__ */

test/libtest/camera_test.h

@@ -4,8 +4,8 @@
  *
  * camera_test.h - libcamera camera test base class
  */
-#ifndef __LIBCAMERA_CAMERA_TEST_H__
-#define __LIBCAMERA_CAMERA_TEST_H__
+
+#pragma once
 
 #include <memory>
 
@@ -23,5 +23,3 @@ protected:
 	std::shared_ptr<libcamera::Camera> camera_;
 	int status_;
 };
-
-#endif /* __LIBCAMERA_CAMERA_TEST_H__ */

test/libtest/test.h

@@ -4,8 +4,8 @@
  *
  * test.h - libcamera test base class
  */
-#ifndef __TEST_TEST_H__
-#define __TEST_TEST_H__
+
+#pragma once
 
 #include <sstream>
 
@@ -34,5 +34,3 @@ int main([[maybe_unused]] int argc, [[maybe_unused]] char *argv[])	\
 {									\
 	return klass().execute();					\
 }
-
-#endif /* __TEST_TEST_H__ */