added UnwindMessage/unwind_msg

2 files changed, 46 insertions, 0 deletions

diff --git a/vespalib/src/tests/unwind_message/CMakeLists.txt b/vespalib/src/tests/unwind_message/CMakeLists.txt
new file mode 100644
index 00000000000..92295ada035
--- /dev/null
+++ b/vespalib/src/tests/unwind_message/CMakeLists.txt
@@ -0,0 +1,9 @@
+# Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+vespa_add_executable(vespalib_unwind_message_test_app TEST
+    SOURCES
+    unwind_message_test.cpp
+    DEPENDS
+    vespalib
+    GTest::GTest
+)
+vespa_add_test(NAME vespalib_unwind_message_test_app COMMAND vespalib_unwind_message_test_app)
diff --git a/vespalib/src/tests/unwind_message/unwind_message_test.cpp b/vespalib/src/tests/unwind_message/unwind_message_test.cpp
new file mode 100644
index 00000000000..53a7bf26c90
--- /dev/null
+++ b/vespalib/src/tests/unwind_message/unwind_message_test.cpp
@@ -0,0 +1,37 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/vespalib/util/unwind_message.h>
+#include <vespa/vespalib/gtest/gtest.h>
+#include <stdexcept>
+
+using vespalib::unwind_msg;
+using vespalib::UnwindMessage;
+
+//-----------------------------------------------------------------------------
+
+struct MyObj {
+    UnwindMessage msg1 = UnwindMessage("this SHOULD be printed (1/2)");
+    UnwindMessage msg2 = UnwindMessage("this should NOT be printed (1)");
+    ~MyObj() {
+        EXPECT_EQ(std::uncaught_exceptions(), 1);
+        auto not_printed_1 = std::move(msg2);
+        auto not_printed_2 = unwind_msg("this should NOT be printed (2)");
+    }
+};
+
+TEST(UnwindMessageTest, unwind_messages_are_printed_when_appropriate) {
+    using E = std::invalid_argument;
+    auto not_printed_3 = unwind_msg("this should NOT be printed (3)");
+    EXPECT_THROW(
+            {
+                EXPECT_EQ(std::uncaught_exceptions(), 0);
+                auto printed = unwind_msg("this SHOULD be printed (2/2)");
+                { auto not_printed_4 = unwind_msg("this should NOT be printed (4)"); }
+                MyObj my_obj;
+                throw E("just testing");
+            }, E);
+}
+
+//-----------------------------------------------------------------------------
+
+GTEST_MAIN_RUN_ALL_TESTS()