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#include "gtest_mpi.hpp"
#include <gtest/gtest.h>
#include <iostream>
#include <memory>
#include <mpi.h>
#include <stdexcept>
#include <vector>
namespace gtest_mpi {
namespace {
class MPIListener : public testing::EmptyTestEventListener {
public:
using UnitTest = testing::UnitTest;
using TestCase = testing::TestCase;
using TestInfo = testing::TestInfo;
using TestPartResult = testing::TestPartResult;
using TestSuite = testing::TestSuite;
MPIListener(testing::TestEventListener *listener)
: listener_(listener), comm_(MPI_COMM_WORLD), gather_called_(false) {
MPI_Comm_dup(MPI_COMM_WORLD, &comm_);
int rank;
MPI_Comm_rank(comm_, &rank);
if (rank != 0)
listener_.reset();
}
void OnTestProgramStart(const UnitTest &u) override {
if (listener_)
listener_->OnTestProgramStart(u);
}
void OnTestProgramEnd(const UnitTest &u) override {
if (listener_)
listener_->OnTestProgramEnd(u);
}
void OnTestStart(const TestInfo &test_info) override {
gather_called_ = false;
if (listener_)
listener_->OnTestStart(test_info);
}
void OnTestPartResult(const TestPartResult &test_part_result) override {
if (listener_) {
listener_->OnTestPartResult(test_part_result);
} else if (test_part_result.type() == TestPartResult::Type::kFatalFailure ||
test_part_result.type() ==
TestPartResult::Type::kNonFatalFailure) {
std::size_t fileIndex = strings_.size();
strings_ += test_part_result.file_name();
strings_ += '\0';
std::size_t messageIndex = strings_.size();
strings_ += test_part_result.message();
strings_ += '\0';
infos_.emplace_back(ResultInfo{test_part_result.type(), fileIndex,
test_part_result.line_number(),
messageIndex});
}
}
void OnTestEnd(const TestInfo &test_info) override {
if(!gather_called_){
std::cerr << "Missing GTEST_MPI_GUARD in test case!" << std::endl;
throw std::runtime_error("Missing GTEST_MPI_GUARD in test case!");
}
if (listener_)
listener_->OnTestEnd(test_info);
}
void OnTestIterationStart(const UnitTest &u, int it) override {
if (listener_)
listener_->OnTestIterationStart(u, it);
}
void OnEnvironmentsSetUpStart(const UnitTest &u) override {
if (listener_)
listener_->OnEnvironmentsSetUpStart(u);
}
void OnEnvironmentsSetUpEnd(const UnitTest &u) override {
if (listener_)
listener_->OnEnvironmentsSetUpEnd(u);
}
void OnTestSuiteStart(const TestSuite &t) override {
if (listener_)
listener_->OnTestSuiteStart(t);
}
void OnTestDisabled(const TestInfo &t) override {
if (listener_)
listener_->OnTestDisabled(t);
}
void OnTestSuiteEnd(const TestSuite &t) override {
if (listener_)
listener_->OnTestSuiteEnd(t);
}
void OnEnvironmentsTearDownStart(const UnitTest &u) override {
if (listener_)
listener_->OnEnvironmentsTearDownStart(u);
}
void OnEnvironmentsTearDownEnd(const UnitTest &u) override {
if (listener_)
listener_->OnEnvironmentsTearDownEnd(u);
}
void OnTestIterationEnd(const UnitTest &u, int it) override {
if (listener_)
listener_->OnTestIterationEnd(u, it);
}
void GatherPartResults() {
gather_called_ = true;
int rank, n_proc;
MPI_Comm_rank(comm_, &rank);
MPI_Comm_size(comm_, &n_proc);
if (rank == 0) {
decltype(infos_) remoteInfos;
decltype(strings_) remoteStrings;
for (int r = 1; r < n_proc; ++r) {
MPI_Status status;
int count;
// Result infos
MPI_Probe(r, 0, comm_, &status);
MPI_Get_count(&status, MPI_CHAR, &count);
auto numResults = static_cast<std::size_t>(count) /
sizeof(decltype(remoteInfos)::value_type);
remoteInfos.resize(numResults);
MPI_Recv(remoteInfos.data(), count, MPI_BYTE, r, 0, comm_,
MPI_STATUS_IGNORE);
// Only continue if any results
if (numResults) {
// Get strings
MPI_Probe(r, 0, comm_, &status);
MPI_Get_count(&status, MPI_CHAR, &count);
auto stringSize = static_cast<std::size_t>(count) /
sizeof(decltype(remoteStrings)::value_type);
remoteStrings.resize(stringSize);
MPI_Recv(&remoteStrings[0], count, MPI_BYTE, r, 0, comm_,
MPI_STATUS_IGNORE);
// Create error for every remote fail
for (const auto &info : remoteInfos) {
if (info.type == TestPartResult::Type::kFatalFailure ||
info.type == TestPartResult::Type::kNonFatalFailure) {
ADD_FAILURE_AT(&remoteStrings[info.fileIndex], info.lineNumber)
<< "Rank " << r << ": " << &remoteStrings[info.messageIndex];
}
}
}
}
} else {
MPI_Send(infos_.data(),
infos_.size() * sizeof(decltype(infos_)::value_type), MPI_BYTE,
0, 0, comm_);
// Only send string if results exist
if (infos_.size()) {
MPI_Send(strings_.data(),
strings_.size() * sizeof(decltype(strings_)::value_type),
MPI_BYTE, 0, 0, comm_);
}
}
infos_.clear();
strings_.clear();
}
private:
struct ResultInfo {
TestPartResult::Type type;
std::size_t fileIndex;
int lineNumber;
std::size_t messageIndex;
};
std::unique_ptr<testing::TestEventListener> listener_;
MPI_Comm comm_;
bool gather_called_;
std::vector<ResultInfo> infos_;
std::string strings_;
};
MPIListener *globalMPIListener = nullptr;
} // namespace
void InitGoogleTestMPI(int *argc, char **argv) {
::testing::InitGoogleTest(argc, argv);
auto &test_listeners = ::testing::UnitTest::GetInstance()->listeners();
globalMPIListener = new MPIListener(
test_listeners.Release(test_listeners.default_result_printer()));
test_listeners.Append(globalMPIListener);
}
TestGuard CreateTestGuard() {
return TestGuard{[]() { globalMPIListener->GatherPartResults(); }};
}
} // namespace gtest_mpi
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