test: Extract CameraTest class out of camera tests to libtest

Many tests other than the camera/ tests use a camera. To increase code
sharing, move the base CameraTest class to the test library. The class
becomes a helper that doesn't inherit from Test anymore (to avoid
diamond inheritance issues when more such helpers will exist).

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

test/libtest/camera_test.cpp

@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * libcamera Camera API tests
+ */
+
+#include <iostream>
+
+#include "camera_test.h"
+#include "test.h"
+
+using namespace libcamera;
+using namespace std;
+
+CameraTest::CameraTest(const char *name)
+{
+	cm_ = new CameraManager();
+
+	if (cm_->start()) {
+		cerr << "Failed to start camera manager" << endl;
+		status_ = TestFail;
+		return;
+	}
+
+	camera_ = cm_->get(name);
+	if (!camera_) {
+		cerr << "Can not find '" << name << "' camera" << endl;
+		status_ = TestSkip;
+		return;
+	}
+
+	/* Sanity check that the camera has streams. */
+	if (camera_->streams().empty()) {
+		cerr << "Camera has no stream" << endl;
+		status_ = TestFail;
+		return;
+	}
+
+	status_ = TestPass;
+}
+
+CameraTest::~CameraTest()
+{
+	if (camera_) {
+		camera_->release();
+		camera_.reset();
+	}
+
+	cm_->stop();
+	delete cm_;
+}

test/libtest/camera_test.h

@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * camera_test.h - libcamera camera test base class
+ */
+#ifndef __LIBCAMERA_CAMERA_TEST_H__
+#define __LIBCAMERA_CAMERA_TEST_H__
+
+#include <libcamera/libcamera.h>
+
+using namespace libcamera;
+
+class CameraTest
+{
+public:
+	CameraTest(const char *name);
+	~CameraTest();
+
+protected:
+	CameraManager *cm_;
+	std::shared_ptr<Camera> camera_;
+	int status_;
+};
+
+#endif /* __LIBCAMERA_CAMERA_TEST_H__ */

test/libtest/meson.build

@@ -1,4 +1,5 @@
 libtest_sources = files([
+    'camera_test.cpp',
     'test.cpp',
 ])