test: camera: Add read default configuration test

Add a test to verify reading the default configuration from a camera
works.

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

test/camera/camera_test.cpp

@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * libcamera Camera API tests
+ */
+
+#include <iostream>
+
+#include "camera_test.h"
+
+using namespace libcamera;
+using namespace std;
+
+int CameraTest::init()
+{
+	cm_ = CameraManager::instance();
+
+	if (cm_->start()) {
+		cout << "Failed to start camera manager" << endl;
+		return TestFail;
+	}
+
+	camera_ = cm_->get("VIMC Sensor B");
+	if (!camera_) {
+		cout << "Can not find VIMC camera" << endl;
+		return TestSkip;
+	}
+
+	/* Sanity check that the camera has streams. */
+	if (camera_->streams().empty()) {
+		cout << "Camera has no stream" << endl;
+		return TestFail;
+	}
+
+	return TestPass;
+}
+
+void CameraTest::cleanup()
+{
+	if (camera_) {
+		camera_->release();
+		camera_.reset();
+	}
+
+	cm_->stop();
+};
+
+bool CameraTest::configurationValid(const std::set<Stream *> &streams,
+				    const std::map<Stream *, StreamConfiguration> &conf) const
+{
+	/* Test that the numbers of streams matches that of configuration. */
+	if (streams.size() != conf.size())
+		return false;
+
+	/*
+	 * Test that stream can be found in configuration and that the
+	 * configuration is valid.
+	 */
+	for (Stream *stream : streams) {
+		std::map<Stream *, StreamConfiguration>::const_iterator it =
+			conf.find(stream);
+
+		if (it == conf.end())
+			return false;
+
+		const StreamConfiguration *sconf = &it->second;
+		if (sconf->width == 0 || sconf->height == 0 ||
+		    sconf->pixelFormat == 0 || sconf->bufferCount == 0)
+			return false;
+	}
+
+	return true;
+}