Log failures from MPI workers (#163)

Author: kmichaelk

tasks/mpi/runner.cpp

@@ -2,36 +2,68 @@
 
 #include <boost/mpi/communicator.hpp>
 #include <boost/mpi/environment.hpp>
+#include <memory>
 
 class UnreadMessagesDetector : public ::testing::EmptyTestEventListener {
  public:
-  UnreadMessagesDetector(boost::mpi::communicator world) : world_(std::move(world)) {}
+  UnreadMessagesDetector(boost::mpi::communicator com) : com_(std::move(com)) {}
 
   void OnTestEnd(const ::testing::TestInfo& test_info) override {
-    world_.barrier();
-    if (const auto msg = world_.iprobe(boost::mpi::any_source, boost::mpi::any_tag)) {
+    com_.barrier();
+    if (const auto msg = com_.iprobe(boost::mpi::any_source, boost::mpi::any_tag)) {
       fprintf(
           stderr,
           "[  PROCESS %d  ] [  FAILED  ] %s.%s: MPI message queue has an unread message from process %d with tag %d\n",
-          world_.rank(), test_info.test_suite_name(), test_info.name(), msg->source(), msg->tag());
+          com_.rank(), test_info.test_suite_name(), test_info.name(), msg->source(), msg->tag());
       exit(2);
     }
-    world_.barrier();
+    com_.barrier();
   }
 
  private:
-  boost::mpi::communicator world_;
+  boost::mpi::communicator com_;
+};
+
+class WorkerTestFailurePrinter : public ::testing::EmptyTestEventListener {
+ public:
+  WorkerTestFailurePrinter(std::shared_ptr<::testing::TestEventListener> base, boost::mpi::communicator com)
+      : base_(std::move(base)), com_(std::move(com)) {}
+
+  void OnTestEnd(const ::testing::TestInfo& test_info) override {
+    if (test_info.result()->Passed()) {
+      return;
+    }
+    PrintProcessRank();
+    base_->OnTestEnd(test_info);
+  }
+
+  void OnTestPartResult(const ::testing::TestPartResult& test_part_result) override {
+    if (test_part_result.passed() || test_part_result.skipped()) {
+      return;
+    }
+    PrintProcessRank();
+    base_->OnTestPartResult(test_part_result);
+  }
+
+ private:
+  void PrintProcessRank() const { printf(" [  PROCESS %d  ] ", com_.rank()); }
+
+  std::shared_ptr<::testing::TestEventListener> base_;
+  boost::mpi::communicator com_;
 };
 
 int main(int argc, char** argv) {
   boost::mpi::environment env(argc, argv);
   boost::mpi::communicator world;
 
   ::testing::InitGoogleTest(&argc, argv);
+
   auto& listeners = ::testing::UnitTest::GetInstance()->listeners();
-  if (world.rank() != 0) {
-    delete listeners.Release(listeners.default_result_printer());
+  if (world.rank() != 0 && (argc < 2 || argv[1] != std::string("--print-workers"))) {
+    auto* listener = listeners.Release(listeners.default_result_printer());
+    listeners.Append(new WorkerTestFailurePrinter(std::shared_ptr<::testing::TestEventListener>(listener), world));
   }
   listeners.Append(new UnreadMessagesDetector(world));
+
   return RUN_ALL_TESTS();
 }