lc-compliance: Refactor using Googletest

Refactor lc-compliance using Googletest as the test framework.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/lc-compliance/main.cpp

@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * Copyright (C) 2020, Google Inc.
+ * Copyright (C) 2021, Collabora Ltd.
  *
  * main.cpp - lc-compliance - The libcamera compliance tool
  */
@@ -9,10 +10,12 @@
 #include <iostream>
 #include <string.h>
 
+#include <gtest/gtest.h>
+
 #include <libcamera/libcamera.h>
 
+#include "environment.h"
 #include "../cam/options.h"
-#include "tests.h"
 
 using namespace libcamera;
 
@@ -21,97 +24,59 @@ enum {
 	OptHelp = 'h',
 };
 
-class Harness
+/*
+ * Make asserts act like exceptions, otherwise they only fail (or skip) the
+ * current function. From gtest documentation:
+ * https://google.github.io/googletest/advanced.html#asserting-on-subroutines-with-an-exception
+ */
+class ThrowListener : public testing::EmptyTestEventListener
 {
-public:
-	Harness(const OptionsParser::Options &options);
-	~Harness();
-
-	int exec();
-
-private:
-	int init();
-	void listCameras();
-
-	OptionsParser::Options options_;
-	std::unique_ptr<CameraManager> cm_;
-	std::shared_ptr<Camera> camera_;
+	void OnTestPartResult(const testing::TestPartResult &result) override
+	{
+		if (result.type() == testing::TestPartResult::kFatalFailure ||
+		    result.type() == testing::TestPartResult::kSkip)
+			throw testing::AssertionException(result);
+	}
 };
 
-Harness::Harness(const OptionsParser::Options &options)
-	: options_(options)
+static void listCameras(CameraManager *cm)
 {
-	cm_ = std::make_unique<CameraManager>();
+	for (const std::shared_ptr<Camera> &cam : cm->cameras())
+		std::cout << "- " << cam.get()->id() << std::endl;
 }
 
-Harness::~Harness()
+static int initCamera(CameraManager *cm, OptionsParser::Options options)
 {
-	if (camera_) {
-		camera_->release();
-		camera_.reset();
-	}
+	std::shared_ptr<Camera> camera;
 
-	cm_->stop();
-}
-
-int Harness::exec()
-{
-	int ret = init();
-	if (ret)
-		return ret;
-
-	std::vector<Results> results;
-
-	results.push_back(testSingleStream(camera_));
-
-	for (const Results &result : results) {
-		ret = result.summary();
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}
-
-int Harness::init()
-{
-	int ret = cm_->start();
+	int ret = cm->start();
 	if (ret) {
 		std::cout << "Failed to start camera manager: "
 			  << strerror(-ret) << std::endl;
 		return ret;
 	}
 
-	if (!options_.isSet(OptCamera)) {
+	if (!options.isSet(OptCamera)) {
 		std::cout << "No camera specified, available cameras:" << std::endl;
-		listCameras();
+		listCameras(cm);
 		return -ENODEV;
 	}
 
-	const std::string &cameraId = options_[OptCamera];
-	camera_ = cm_->get(cameraId);
-	if (!camera_) {
+	const std::string &cameraId = options[OptCamera];
+	camera = cm->get(cameraId);
+	if (!camera) {
 		std::cout << "Camera " << cameraId << " not found, available cameras:" << std::endl;
-		listCameras();
+		listCameras(cm);
 		return -ENODEV;
 	}
 
-	if (camera_->acquire()) {
-		std::cout << "Failed to acquire camera" << std::endl;
-		return -EINVAL;
-	}
+	Environment::get()->setup(cm, cameraId);
 
 	std::cout << "Using camera " << cameraId << std::endl;
 
 	return 0;
 }
 
-void Harness::listCameras()
-{
-	for (const std::shared_ptr<Camera> &cam : cm_->cameras())
-		std::cout << "- " << cam.get()->id() << std::endl;
-}
-
 static int parseOptions(int argc, char **argv, OptionsParser::Options *options)
 {
 	OptionsParser parser;
@@ -142,7 +107,17 @@ int main(int argc, char **argv)
 	if (ret < 0)
 		return EXIT_FAILURE;
 
-	Harness harness(options);
+	std::unique_ptr<CameraManager> cm = std::make_unique<CameraManager>();
 
-	return harness.exec() ? EXIT_FAILURE : EXIT_SUCCESS;
+	ret = initCamera(cm.get(), options);
+	if (ret)
+		return ret;
+
+	testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
+
+	ret = RUN_ALL_TESTS();
+
+	cm->stop();
+
+	return ret;
 }