cpp: Prove broken exceptions

tests/cpp_exception/Makefile

@@ -0,0 +1,9 @@
+include ../Makefile.tests_common
+
+# If you want to add some extra flags when compile c++ files, add these flags
+# to CXXEXFLAGS variable
+CXXEXFLAGS += -std=c++11
+FEATURES_REQUIRED += cpp
+
+include $(RIOTBASE)/Makefile.include
+deps: $(BUILDDEPS)

tests/cpp_exception/main.cpp

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2022 Jens Wetterich <[email protected]>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup    tests
+ * @{
+ * @file
+ * @brief      Unit test to show the wrong behavior of c++ exceptions
+ * @author     Jens Wetterich <[email protected]>
+ */
+
+#include <cstdio>
+#include <stdexcept>
+#include "test_utils/expect.h"
+
+int main() {
+  puts("\n************ C++ exception test ***********");
+
+  bool enabled = false;
+
+  if(__EXCEPTIONS) {
+      puts("Exceptions enabled");
+      enabled = true;
+  } else {
+      puts("Exceptions disabled");
+  }
+
+  expect(enabled);
+
+  bool catched = false;
+
+  try {
+      throw std::runtime_error("Exception");
+  } catch(std::exception& e) {
+      catched = true;
+      printf("%s catched\n", e.what());
+  }
+
+  expect(catched);
+
+  puts("******************************************");
+
+  return 0;
+}

tests/cpp_exception/tests/01-run.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2022 Jens Wetterich <[email protected]>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+import sys
+from testrunner import run
+
+
+def testfunc(child):
+    child.expect_exact("************ C++ exception test ***********")
+    child.expect_exact("Exceptions enabled")
+    child.expect_exact("Exception catched")
+    child.expect_exact("******************************************")
+
+
+if __name__ == "__main__":
+    sys.exit(run(testfunc))