[libcamera-devel] [PATCH v9 4/5] lc-compliance: Refactor using Googletest

paul.elder at ideasonboard.com paul.elder at ideasonboard.com
Mon Jun 28 10:28:04 CEST 2021


Hi Nicolas,

On Fri, Jun 25, 2021 at 04:39:24PM -0300, Nícolas F. R. A. Prado wrote:
> Refactor lc-compliance using Googletest as the test framework.
> 
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>
> Reviewed-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
> ---
> Changes in v9:
> - Thanks to Jacopo:
>   - Removed the Harness class, substituting methods with static helper functions
>   - Added EXPECT() for the number of buffers allocated in SimpleCapture::start()
>   - Changed ASSERT_FALSE() to ASSERT_EQ(..., 0) in SetUp()
>   - Changed tests naming:
>     - TestSuite instance: RolesAndRequests -> CaptureTests
>     - TestSuite: FixedRequestsTest -> SingleStream
>     - TestCase: BalancedSingleCycle -> Capture
>     - TestCase: BalancedMultiCycle -> CaptureStartStop
>     - TestCase: Unbalanced -> UnbalancedStop
>   - Renamed single_stream.cpp to capture_test.cpp
> 
> Changes in v8:
> - Thanks to Laurent:
>   - Fixed lc-compliance's meson.build to disable when gtest is not installed
>   - Fixed compiling error in Clang
> 
> Changes in v7:
> - Thanks to Jacopo:
>   - Made CameraManager a unique_ptr and passed to Environment as raw pointer
> 
> No changes in v6
> 
> Changes in v5:
> - Thanks to Laurent:
>   - Fixed style issues
>   - Added SetUp and TearDown functions to acquire and release the camera for
>     each test
> 
> Changes in v4:
> - Removed old lc-compliance results classes
> - Thanks to Niklas:
>   - Improved naming of tests
> 
> Changes in v3:
> - Thanks to Niklas:
>   - Went back to static test registration, and created a Singleton Environment
>     class to store the camera global variable
> - Added a nameParameters() function to give meaningful names to the test
>   parameters, removing the need to register each test suite for every role
> 
>  src/lc-compliance/capture_test.cpp   | 127 +++++++++++++++++++++++++++
>  src/lc-compliance/main.cpp           | 106 +++++++++-------------
>  src/lc-compliance/meson.build        |   7 +-
>  src/lc-compliance/results.cpp        |  75 ----------------
>  src/lc-compliance/results.h          |  47 ----------
>  src/lc-compliance/simple_capture.cpp |  77 +++++++---------
>  src/lc-compliance/simple_capture.h   |   9 +-
>  src/lc-compliance/single_stream.cpp  |  97 --------------------
>  src/lc-compliance/tests.h            |  16 ----
>  9 files changed, 206 insertions(+), 355 deletions(-)
>  create mode 100644 src/lc-compliance/capture_test.cpp
>  delete mode 100644 src/lc-compliance/results.cpp
>  delete mode 100644 src/lc-compliance/results.h
>  delete mode 100644 src/lc-compliance/single_stream.cpp
>  delete mode 100644 src/lc-compliance/tests.h
> 
> diff --git a/src/lc-compliance/capture_test.cpp b/src/lc-compliance/capture_test.cpp
> new file mode 100644
> index 000000000000..116ae496fe04
> --- /dev/null
> +++ b/src/lc-compliance/capture_test.cpp
> @@ -0,0 +1,127 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2020, Google Inc.
> + *
> + * single_stream.cpp - Test a single camera stream
> + */
> +
> +#include <iostream>
> +
> +#include <gtest/gtest.h>
> +
> +#include "environment.h"
> +#include "simple_capture.h"
> +
> +using namespace libcamera;
> +
> +const std::vector<int> NUMREQUESTS = { 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 };
> +const std::vector<StreamRole> ROLES = { Raw, StillCapture, VideoRecording, Viewfinder };
> +
> +class SingleStream : public testing::TestWithParam<std::tuple<StreamRole, int>>
> +{
> +public:
> +	static std::string nameParameters(const testing::TestParamInfo<SingleStream::ParamType> &info);
> +
> +protected:
> +	void SetUp() override;
> +	void TearDown() override;
> +
> +	std::shared_ptr<Camera> camera_;
> +};
> +
> +/*
> + * We use gtest's SetUp() and TearDown() instead of constructor and destructor
> + * in order to be able to assert on them.
> + */
> +void SingleStream::SetUp()
> +{
> +	Environment *env = Environment::get();
> +
> +	camera_ = env->cm()->get(env->cameraId());
> +
> +	ASSERT_EQ(camera_->acquire(), 0);
> +}
> +
> +void SingleStream::TearDown()
> +{
> +	if (!camera_)
> +		return;
> +
> +	camera_->release();
> +	camera_.reset();
> +}
> +
> +std::string SingleStream::nameParameters(const testing::TestParamInfo<SingleStream::ParamType> &info)
> +{
> +	std::map<StreamRole, std::string> rolesMap = { { Raw, "Raw" },
> +						       { StillCapture, "StillCapture" },
> +						       { VideoRecording, "VideoRecording" },
> +						       { Viewfinder, "Viewfinder" } };
> +
> +	std::string roleName = rolesMap[std::get<0>(info.param)];
> +	std::string numRequestsName = std::to_string(std::get<1>(info.param));
> +
> +	return roleName + "_" + numRequestsName;
> +}
> +
> +/*
> + * Test single capture cycles
> + *
> + * Makes sure the camera completes the exact number of requests queued. Example
> + * failure is a camera that needs N+M requests queued to complete N requests to
> + * the application.
> + */
> +TEST_P(SingleStream, Capture)
> +{
> +	auto [role, numRequests] = GetParam();
> +
> +	SimpleCaptureBalanced capture(camera_);
> +
> +	capture.configure(role);
> +
> +	capture.capture(numRequests);
> +}
> +
> +/*
> + * Test multiple start/stop cycles
> + *
> + * Makes sure the camera supports multiple start/stop cycles. Example failure is
> + * a camera that does not clean up correctly in its error path but is only
> + * tested by single-capture applications.
> + */
> +TEST_P(SingleStream, CaptureStartStop)
> +{
> +	auto [role, numRequests] = GetParam();
> +	unsigned int numRepeats = 3;
> +
> +	SimpleCaptureBalanced capture(camera_);
> +
> +	capture.configure(role);
> +
> +	for (unsigned int starts = 0; starts < numRepeats; starts++)
> +		capture.capture(numRequests);
> +}
> +
> +/*
> + * Test unbalanced stop
> + *
> + * Makes sure the camera supports a stop with requests queued. Example failure
> + * is a camera that does not handle cancelation of buffers coming back from the
> + * video device while stopping.
> + */
> +TEST_P(SingleStream, UnbalancedStop)
> +{
> +	auto [role, numRequests] = GetParam();
> +
> +	SimpleCaptureUnbalanced capture(camera_);
> +
> +	capture.configure(role);
> +
> +	capture.capture(numRequests);
> +}
> +
> +INSTANTIATE_TEST_SUITE_P(CaptureTests,
> +			 SingleStream,
> +			 testing::Combine(testing::ValuesIn(ROLES),
> +					  testing::ValuesIn(NUMREQUESTS)),
> +			 SingleStream::nameParameters);
> diff --git a/src/lc-compliance/main.cpp b/src/lc-compliance/main.cpp
> index 54cee54aa978..b01768b5fc0b 100644
> --- a/src/lc-compliance/main.cpp
> +++ b/src/lc-compliance/main.cpp
> @@ -9,10 +9,12 @@
>  #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 +23,59 @@ 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);

This fails compilation in cros_sdk, as exceptions are disabled. The
behavior can be reproduced outside of the cros_sdk by adding
-fno-exceptions and compiling on clang.

Adding this fixes the issue:

diff --git a/src/lc-compliance/meson.build b/src/lc-compliance/meson.build
index 0fd2aca1..aa5852f6 100644
--- a/src/lc-compliance/meson.build
+++ b/src/lc-compliance/meson.build
@@ -20,6 +20,7 @@ lc_compliance_sources = files([
 ])
 
 lc_compliance  = executable('lc-compliance', lc_compliance_sources,
+                            cpp_args : [ '-fexceptions' ],
                             dependencies : [
                                 libatomic,
                                 libcamera_public,


Paul

> +	}
>  };
>  
> -Harness::Harness(const OptionsParser::Options &options)
> -	: options_(options)
> -{
> -	cm_ = std::make_unique<CameraManager>();
> -}
> -
> -Harness::~Harness()
> +static void listCameras(CameraManager *cm)
>  {
> -	if (camera_) {
> -		camera_->release();
> -		camera_.reset();
> -	}
> -
> -	cm_->stop();
> +	for (const std::shared_ptr<Camera> &cam : cm->cameras())
> +		std::cout << "- " << cam.get()->id() << std::endl;
>  }
>  
> -int Harness::exec()
> +static int initCamera(CameraManager *cm, OptionsParser::Options options)
>  {
> -	int ret = init();
> -	if (ret)
> -		return ret;
> -
> -	std::vector<Results> results;
> +	std::shared_ptr<Camera> camera;
>  
> -	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 +106,17 @@ int main(int argc, char **argv)
>  	if (ret < 0)
>  		return EXIT_FAILURE;
>  
> -	Harness harness(options);
> +	std::unique_ptr<CameraManager> cm = std::make_unique<CameraManager>();
> +
> +	ret = initCamera(cm.get(), options);
> +	if (ret)
> +		return ret;
> +
> +	testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
> +
> +	ret = RUN_ALL_TESTS();
> +
> +	cm->stop();
>  
> -	return harness.exec() ? EXIT_FAILURE : EXIT_SUCCESS;
> +	return ret;
>  }
> diff --git a/src/lc-compliance/meson.build b/src/lc-compliance/meson.build
> index 6dd49085569f..f3a79ae438a9 100644
> --- a/src/lc-compliance/meson.build
> +++ b/src/lc-compliance/meson.build
> @@ -1,8 +1,9 @@
>  # SPDX-License-Identifier: CC0-1.0
>  
>  libevent = dependency('libevent_pthreads', required : get_option('lc-compliance'))
> +libgtest = dependency('gtest', required : get_option('lc-compliance'))
>  
> -if not libevent.found()
> +if not (libevent.found() and libgtest.found())
>      lc_compliance_enabled = false
>      subdir_done()
>  endif
> @@ -14,9 +15,8 @@ lc_compliance_sources = files([
>      '../cam/options.cpp',
>      'environment.cpp',
>      'main.cpp',
> -    'results.cpp',
>      'simple_capture.cpp',
> -    'single_stream.cpp',
> +    'capture_test.cpp',
>  ])
>  
>  lc_compliance  = executable('lc-compliance', lc_compliance_sources,
> @@ -24,5 +24,6 @@ lc_compliance  = executable('lc-compliance', lc_compliance_sources,
>                                  libatomic,
>                                  libcamera_dep,
>                                  libevent,
> +                                libgtest,
>                              ],
>                              install : true)
> diff --git a/src/lc-compliance/results.cpp b/src/lc-compliance/results.cpp
> deleted file mode 100644
> index f149f7859e28..000000000000
> --- a/src/lc-compliance/results.cpp
> +++ /dev/null
> @@ -1,75 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0-or-later */
> -/*
> - * Copyright (C) 2020, Google Inc.
> - *
> - * results.cpp - Test result aggregator
> - */
> -
> -#include "results.h"
> -
> -#include <iostream>
> -
> -void Results::add(const Result &result)
> -{
> -	if (result.first == Pass)
> -		passed_++;
> -	else if (result.first == Fail)
> -		failed_++;
> -	else if (result.first == Skip)
> -		skipped_++;
> -
> -	printResult(result);
> -}
> -
> -void Results::add(Status status, const std::string &message)
> -{
> -	add({ status, message });
> -}
> -
> -void Results::fail(const std::string &message)
> -{
> -	add(Fail, message);
> -}
> -
> -void Results::pass(const std::string &message)
> -{
> -	add(Pass, message);
> -}
> -
> -void Results::skip(const std::string &message)
> -{
> -	add(Skip, message);
> -}
> -
> -int Results::summary() const
> -{
> -	if (failed_ + passed_ + skipped_ != planned_) {
> -		std::cout << "Planned and executed number of tests differ "
> -			  << failed_ + passed_ + skipped_ << " executed "
> -			  << planned_ << " planned" << std::endl;
> -
> -		return -EINVAL;
> -	}
> -
> -	std::cout << planned_ << " tests executed, "
> -		  << passed_ << " tests passed, "
> -		  << skipped_ << " tests skipped and "
> -		  << failed_ << " tests failed " << std::endl;
> -
> -	return 0;
> -}
> -
> -void Results::printResult(const Result &result)
> -{
> -	std::string prefix;
> -
> -	/* \todo Make parsable as TAP. */
> -	if (result.first == Pass)
> -		prefix = "PASS";
> -	else if (result.first == Fail)
> -		prefix = "FAIL";
> -	else if (result.first == Skip)
> -		prefix = "SKIP";
> -
> -	std::cout << "- " << prefix << ": " << result.second << std::endl;
> -}
> diff --git a/src/lc-compliance/results.h b/src/lc-compliance/results.h
> deleted file mode 100644
> index 2a3722b841a6..000000000000
> --- a/src/lc-compliance/results.h
> +++ /dev/null
> @@ -1,47 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0-or-later */
> -/*
> - * Copyright (C) 2020, Google Inc.
> - *
> - * results.h - Test result aggregator
> - */
> -#ifndef __LC_COMPLIANCE_RESULTS_H__
> -#define __LC_COMPLIANCE_RESULTS_H__
> -
> -#include <string>
> -#include <utility>
> -
> -/* \todo Check if result aggregator can be shared with self tests in test/ */
> -class Results
> -{
> -public:
> -	enum Status {
> -		Fail,
> -		Pass,
> -		Skip,
> -	};
> -
> -	using Result = std::pair<Status, std::string>;
> -
> -	Results(unsigned int planned)
> -		: planned_(planned), passed_(0), failed_(0), skipped_(0)
> -	{
> -	}
> -
> -	void add(const Result &result);
> -	void add(Status status, const std::string &message);
> -	void fail(const std::string &message);
> -	void pass(const std::string &message);
> -	void skip(const std::string &message);
> -
> -	int summary() const;
> -
> -private:
> -	void printResult(const Result &result);
> -
> -	unsigned int planned_;
> -	unsigned int passed_;
> -	unsigned int failed_;
> -	unsigned int skipped_;
> -};
> -
> -#endif /* __LC_COMPLIANCE_RESULTS_H__ */
> diff --git a/src/lc-compliance/simple_capture.cpp b/src/lc-compliance/simple_capture.cpp
> index bfc91b26444e..ce0883672709 100644
> --- a/src/lc-compliance/simple_capture.cpp
> +++ b/src/lc-compliance/simple_capture.cpp
> @@ -5,6 +5,8 @@
>   * simple_capture.cpp - Simple capture helper
>   */
>  
> +#include <gtest/gtest.h>
> +
>  #include "simple_capture.h"
>  
>  using namespace libcamera;
> @@ -20,38 +22,37 @@ SimpleCapture::~SimpleCapture()
>  	stop();
>  }
>  
> -Results::Result SimpleCapture::configure(StreamRole role)
> +void SimpleCapture::configure(StreamRole role)
>  {
>  	config_ = camera_->generateConfiguration({ role });
>  
> -	if (!config_)
> -		return { Results::Skip, "Role not supported by camera" };
> +	if (!config_) {
> +		std::cout << "Role not supported by camera" << std::endl;
> +		GTEST_SKIP();
> +	}
>  
>  	if (config_->validate() != CameraConfiguration::Valid) {
>  		config_.reset();
> -		return { Results::Fail, "Configuration not valid" };
> +		FAIL() << "Configuration not valid";
>  	}
>  
>  	if (camera_->configure(config_.get())) {
>  		config_.reset();
> -		return { Results::Fail, "Failed to configure camera" };
> +		FAIL() << "Failed to configure camera";
>  	}
> -
> -	return { Results::Pass, "Configure camera" };
>  }
>  
> -Results::Result SimpleCapture::start()
> +void SimpleCapture::start()
>  {
>  	Stream *stream = config_->at(0).stream();
> -	if (allocator_->allocate(stream) < 0)
> -		return { Results::Fail, "Failed to allocate buffers" };
> +	int count = allocator_->allocate(stream);
>  
> -	if (camera_->start())
> -		return { Results::Fail, "Failed to start camera" };
> +	ASSERT_GE(count, 0) << "Failed to allocate buffers";
> +	EXPECT_EQ(count, config_->at(0).bufferCount) << "Allocated less buffers than expected";
>  
> -	camera_->requestCompleted.connect(this, &SimpleCapture::requestComplete);
> +	ASSERT_TRUE(!camera_->start()) << "Failed to start camera";
>  
> -	return { Results::Pass, "Started camera" };
> +	camera_->requestCompleted.connect(this, &SimpleCapture::requestComplete);
>  }
>  
>  void SimpleCapture::stop()
> @@ -74,22 +75,19 @@ SimpleCaptureBalanced::SimpleCaptureBalanced(std::shared_ptr<Camera> camera)
>  {
>  }
>  
> -Results::Result SimpleCaptureBalanced::capture(unsigned int numRequests)
> +void SimpleCaptureBalanced::capture(unsigned int numRequests)
>  {
> -	Results::Result ret = start();
> -	if (ret.first != Results::Pass)
> -		return ret;
> +	start();
>  
>  	Stream *stream = config_->at(0).stream();
>  	const std::vector<std::unique_ptr<FrameBuffer>> &buffers = allocator_->buffers(stream);
>  
>  	/* No point in testing less requests then the camera depth. */
>  	if (buffers.size() > numRequests) {
> -		/* Cache buffers.size() before we destroy it in stop() */
> -		int buffers_size = buffers.size();
> -
> -		return { Results::Skip, "Camera needs " + std::to_string(buffers_size)
> -			+ " requests, can't test only " + std::to_string(numRequests) };
> +		std::cout << "Camera needs " + std::to_string(buffers.size())
> +			+ " requests, can't test only "
> +			+ std::to_string(numRequests) << std::endl;
> +		GTEST_SKIP();
>  	}
>  
>  	queueCount_ = 0;
> @@ -100,14 +98,11 @@ Results::Result SimpleCaptureBalanced::capture(unsigned int numRequests)
>  	std::vector<std::unique_ptr<libcamera::Request>> requests;
>  	for (const std::unique_ptr<FrameBuffer> &buffer : buffers) {
>  		std::unique_ptr<Request> request = camera_->createRequest();
> -		if (!request)
> -			return { Results::Fail, "Can't create request" };
> +		ASSERT_TRUE(request) << "Can't create request";
>  
> -		if (request->addBuffer(stream, buffer.get()))
> -			return { Results::Fail, "Can't set buffer for request" };
> +		ASSERT_FALSE(request->addBuffer(stream, buffer.get())) << "Can't set buffer for request";
>  
> -		if (queueRequest(request.get()) < 0)
> -			return { Results::Fail, "Failed to queue request" };
> +		ASSERT_GE(queueRequest(request.get()), 0) << "Failed to queue request";
>  
>  		requests.push_back(std::move(request));
>  	}
> @@ -118,12 +113,7 @@ Results::Result SimpleCaptureBalanced::capture(unsigned int numRequests)
>  	stop();
>  	delete loop_;
>  
> -	if (captureCount_ != captureLimit_)
> -		return { Results::Fail, "Got " + std::to_string(captureCount_) +
> -			" request, wanted " + std::to_string(captureLimit_) };
> -
> -	return { Results::Pass, "Balanced capture of " +
> -		std::to_string(numRequests) + " requests" };
> +	ASSERT_EQ(captureCount_, captureLimit_);
>  }
>  
>  int SimpleCaptureBalanced::queueRequest(Request *request)
> @@ -155,11 +145,9 @@ SimpleCaptureUnbalanced::SimpleCaptureUnbalanced(std::shared_ptr<Camera> camera)
>  {
>  }
>  
> -Results::Result SimpleCaptureUnbalanced::capture(unsigned int numRequests)
> +void SimpleCaptureUnbalanced::capture(unsigned int numRequests)
>  {
> -	Results::Result ret = start();
> -	if (ret.first != Results::Pass)
> -		return ret;
> +	start();
>  
>  	Stream *stream = config_->at(0).stream();
>  	const std::vector<std::unique_ptr<FrameBuffer>> &buffers = allocator_->buffers(stream);
> @@ -171,14 +159,11 @@ Results::Result SimpleCaptureUnbalanced::capture(unsigned int numRequests)
>  	std::vector<std::unique_ptr<libcamera::Request>> requests;
>  	for (const std::unique_ptr<FrameBuffer> &buffer : buffers) {
>  		std::unique_ptr<Request> request = camera_->createRequest();
> -		if (!request)
> -			return { Results::Fail, "Can't create request" };
> +		ASSERT_TRUE(request) << "Can't create request";
>  
> -		if (request->addBuffer(stream, buffer.get()))
> -			return { Results::Fail, "Can't set buffer for request" };
> +		ASSERT_FALSE(request->addBuffer(stream, buffer.get())) << "Can't set buffer for request";
>  
> -		if (camera_->queueRequest(request.get()) < 0)
> -			return { Results::Fail, "Failed to queue request" };
> +		ASSERT_GE(camera_->queueRequest(request.get()), 0) << "Failed to queue request";
>  
>  		requests.push_back(std::move(request));
>  	}
> @@ -189,7 +174,7 @@ Results::Result SimpleCaptureUnbalanced::capture(unsigned int numRequests)
>  	stop();
>  	delete loop_;
>  
> -	return { status ? Results::Fail : Results::Pass, "Unbalanced capture of " + std::to_string(numRequests) + " requests" };
> +	ASSERT_FALSE(status);
>  }
>  
>  void SimpleCaptureUnbalanced::requestComplete(Request *request)
> diff --git a/src/lc-compliance/simple_capture.h b/src/lc-compliance/simple_capture.h
> index d9de53fb63a3..62984243a1fa 100644
> --- a/src/lc-compliance/simple_capture.h
> +++ b/src/lc-compliance/simple_capture.h
> @@ -12,18 +12,17 @@
>  #include <libcamera/libcamera.h>
>  
>  #include "../cam/event_loop.h"
> -#include "results.h"
>  
>  class SimpleCapture
>  {
>  public:
> -	Results::Result configure(libcamera::StreamRole role);
> +	void configure(libcamera::StreamRole role);
>  
>  protected:
>  	SimpleCapture(std::shared_ptr<libcamera::Camera> camera);
>  	virtual ~SimpleCapture();
>  
> -	Results::Result start();
> +	void start();
>  	void stop();
>  
>  	virtual void requestComplete(libcamera::Request *request) = 0;
> @@ -40,7 +39,7 @@ class SimpleCaptureBalanced : public SimpleCapture
>  public:
>  	SimpleCaptureBalanced(std::shared_ptr<libcamera::Camera> camera);
>  
> -	Results::Result capture(unsigned int numRequests);
> +	void capture(unsigned int numRequests);
>  
>  private:
>  	int queueRequest(libcamera::Request *request);
> @@ -56,7 +55,7 @@ class SimpleCaptureUnbalanced : public SimpleCapture
>  public:
>  	SimpleCaptureUnbalanced(std::shared_ptr<libcamera::Camera> camera);
>  
> -	Results::Result capture(unsigned int numRequests);
> +	void capture(unsigned int numRequests);
>  
>  private:
>  	void requestComplete(libcamera::Request *request) override;
> diff --git a/src/lc-compliance/single_stream.cpp b/src/lc-compliance/single_stream.cpp
> deleted file mode 100644
> index 8318b42f42d6..000000000000
> --- a/src/lc-compliance/single_stream.cpp
> +++ /dev/null
> @@ -1,97 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0-or-later */
> -/*
> - * Copyright (C) 2020, Google Inc.
> - *
> - * single_stream.cpp - Test a single camera stream
> - */
> -
> -#include <iostream>
> -
> -#include "simple_capture.h"
> -#include "tests.h"
> -
> -using namespace libcamera;
> -
> -Results::Result testRequestBalance(std::shared_ptr<Camera> camera,
> -				   StreamRole role, unsigned int startCycles,
> -				   unsigned int numRequests)
> -{
> -	SimpleCaptureBalanced capture(camera);
> -
> -	Results::Result ret = capture.configure(role);
> -	if (ret.first != Results::Pass)
> -		return ret;
> -
> -	for (unsigned int starts = 0; starts < startCycles; starts++) {
> -		ret = capture.capture(numRequests);
> -		if (ret.first != Results::Pass)
> -			return ret;
> -	}
> -
> -	return { Results::Pass, "Balanced capture of " +
> -		std::to_string(numRequests) + " requests with " +
> -		std::to_string(startCycles) + " start cycles" };
> -}
> -
> -Results::Result testRequestUnbalance(std::shared_ptr<Camera> camera,
> -				     StreamRole role, unsigned int numRequests)
> -{
> -	SimpleCaptureUnbalanced capture(camera);
> -
> -	Results::Result ret = capture.configure(role);
> -	if (ret.first != Results::Pass)
> -		return ret;
> -
> -	return capture.capture(numRequests);
> -}
> -
> -Results testSingleStream(std::shared_ptr<Camera> camera)
> -{
> -	static const std::vector<std::pair<std::string, StreamRole>> roles = {
> -		{ "raw", Raw },
> -		{ "still", StillCapture },
> -		{ "video", VideoRecording },
> -		{ "viewfinder", Viewfinder },
> -	};
> -	static const std::vector<unsigned int> numRequests = { 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 };
> -
> -	Results results(numRequests.size() * roles.size() * 3);
> -
> -	for (const auto &role : roles) {
> -		std::cout << "= Test role " << role.first << std::endl;
> -		/*
> -		 * Test single capture cycles
> -		 *
> -		 * Makes sure the camera completes the exact number of requests queued.
> -		 * Example failure is a camera that needs N+M requests queued to
> -		 * complete N requests to the application.
> -		 */
> -		std::cout << "* Test single capture cycles" << std::endl;
> -		for (unsigned int num : numRequests)
> -			results.add(testRequestBalance(camera, role.second, 1, num));
> -
> -		/*
> -		 * Test multiple start/stop cycles
> -		 *
> -		 * Makes sure the camera supports multiple start/stop cycles.
> -		 * Example failure is a camera that does not clean up correctly in its
> -		 * error path but is only tested by single-capture applications.
> -		 */
> -		std::cout << "* Test multiple start/stop cycles" << std::endl;
> -		for (unsigned int num : numRequests)
> -			results.add(testRequestBalance(camera, role.second, 3, num));
> -
> -		/*
> -		 * Test unbalanced stop
> -		 *
> -		 * Makes sure the camera supports a stop with requests queued.
> -		 * Example failure is a camera that does not handle cancelation
> -		 * of buffers coming back from the video device while stopping.
> -		 */
> -		std::cout << "* Test unbalanced stop" << std::endl;
> -		for (unsigned int num : numRequests)
> -			results.add(testRequestUnbalance(camera, role.second, num));
> -	}
> -
> -	return results;
> -}
> diff --git a/src/lc-compliance/tests.h b/src/lc-compliance/tests.h
> deleted file mode 100644
> index 396605214e4b..000000000000
> --- a/src/lc-compliance/tests.h
> +++ /dev/null
> @@ -1,16 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0-or-later */
> -/*
> - * Copyright (C) 2020, Google Inc.
> - *
> - * tests.h - Test modules
> - */
> -#ifndef __LC_COMPLIANCE_TESTS_H__
> -#define __LC_COMPLIANCE_TESTS_H__
> -
> -#include <libcamera/libcamera.h>
> -
> -#include "results.h"
> -
> -Results testSingleStream(std::shared_ptr<libcamera::Camera> camera);
> -
> -#endif /* __LC_COMPLIANCE_TESTS_H__ */
> -- 
> 2.32.0
> 


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