From fc9b226d19b59e965b1746ba5dc6fc603de3b591 Mon Sep 17 00:00:00 2001
From: Kieran Bingham <kieran.bingham@ideasonboard.com>
Date: Wed, 23 Jun 2021 23:10:20 +0100
Subject: test: Ensure LIBCAMERA_BASE_PRIVATE isn't public

If LIBCAMERA_BASE_PRIVATE is ever exposed on the libcamera public dependencies,
then the private.h header protection will be circumvented.

Provide a test which will fail (at compile time) if the LIBCAMERA_BASE_PRIVATE
define ever leaks to the public dependencies.

Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 test/meson.build    |  1 +
 test/public-api.cpp | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 test/public-api.cpp

diff --git a/test/meson.build b/test/meson.build
index 73eb44d0..2c3e7654 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -25,6 +25,7 @@ subdir('v4l2_videodevice')
 
 public_tests = [
     ['geometry',                        'geometry.cpp'],
+    ['public-api',                      'public-api.cpp'],
     ['signal',                          'signal.cpp'],
     ['span',                            'span.cpp'],
 ]
diff --git a/test/public-api.cpp b/test/public-api.cpp
new file mode 100644
index 00000000..a1cebcf9
--- /dev/null
+++ b/test/public-api.cpp
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2021, Google Inc.
+ *
+ * public-api.cpp - Public API validation
+ */
+
+#include <libcamera/libcamera.h>
+
+#include "test.h"
+
+class PublicAPITest : public Test
+{
+	int run()
+	{
+#ifdef LIBCAMERA_BASE_PRIVATE
+#error "Public interfaces should not be exposed to LIBCAMERA_BASE_PRIVATE"
+		return TestFail;
+#else
+		return TestPass;
+#endif
+	}
+};
+
+TEST_REGISTER(PublicAPITest)
-- 
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