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/configuration_default.cpp

@@ -0,0 +1,71 @@
+/* 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 std;
+
+namespace {
+
+class ConfigurationDefault : public CameraTest
+{
+protected:
+	int run()
+	{
+		std::map<Stream *, StreamConfiguration> conf;
+
+		/*
+		 * Test that asking for default configuration for a valid
+		 * array of streams returns something valid.
+		 */
+		std::set<Stream *> streams = { *camera_->streams().begin() };
+		conf = camera_->streamConfiguration(streams);
+		if (conf.empty()) {
+			cout << "Failed to retrieve configuration for valid streams"
+			     << endl;
+			return TestFail;
+		}
+
+		if (!configurationValid(streams, conf)) {
+			cout << "Default configuration invalid" << endl;
+			return TestFail;
+		}
+
+		/*
+		 * Test that asking for configuration for an empty array of
+		 * streams returns an empty list of configurations.
+		 */
+		std::set<Stream *> streams_empty = {};
+		conf = camera_->streamConfiguration(streams_empty);
+		if (!conf.empty()) {
+			cout << "Failed to retrieve configuration for empty streams"
+			     << endl;
+			return TestFail;
+		}
+
+		/*
+		 * Test that asking for configuration for an array of bad streams
+		 * returns an empty list of configurations.
+		 */
+		Stream *stream_bad = reinterpret_cast<Stream *>(0xdeadbeef);
+		std::set<Stream *> streams_bad = { stream_bad };
+		conf = camera_->streamConfiguration(streams_bad);
+		if (!conf.empty()) {
+			cout << "Failed to retrieve configuration for bad streams"
+			     << endl;
+			return TestFail;
+		}
+
+		return TestPass;
+	}
+};
+
+} /* namespace */
+
+TEST_REGISTER(ConfigurationDefault);