test: v4l2_device: Add StreamOn/StreamOff test

Provide a small test to exercise the streamOn() and streamOff() calls.
8 buffers are requested locally.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

test/v4l2_device/meson.build

@@ -3,6 +3,7 @@
 v4l2_device_tests = [
   [ 'double_open',        'double_open.cpp' ],
   [ 'request_buffers',    'request_buffers.cpp' ],
+  [ 'stream_on_off',      'stream_on_off.cpp' ],
 ]
 
 foreach t : v4l2_device_tests

test/v4l2_device/stream_on_off.cpp

@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * libcamera V4L2 API tests
+ */
+
+#include "v4l2_device_test.h"
+
+class StreamOnStreamOffTest : public V4L2DeviceTest
+{
+protected:
+	int run()
+	{
+		const unsigned int bufferCount = 8;
+
+		createBuffers(bufferCount);
+
+		int ret = dev_->exportBuffers(bufferCount, &pool_);
+		if (ret)
+			return TestFail;
+
+		ret = dev_->streamOn();
+		if (ret)
+			return TestFail;
+
+		ret = dev_->streamOff();
+		if (ret)
+			return TestFail;
+
+		return TestPass;
+	}
+};
+
+TEST_REGISTER(StreamOnStreamOffTest);