From f626deda19e54adaaff1cd0d7b22421f934dec55 Mon Sep 17 00:00:00 2001
From: Ihor Dutchak <ihor.youw@gmail.com>
Date: Tue, 6 Aug 2019 16:22:08 +0300
Subject: [PATCH] Added special catch for std::exception in
 GTEST_TEST_NO_THROW_

---
 .../include/gtest/internal/gtest-internal.h   | 34 +++++++++++++++++--
 googletest/test/gtest_unittest.cc             | 13 +++++++
 2 files changed, 44 insertions(+), 3 deletions(-)

diff --git a/googletest/include/gtest/internal/gtest-internal.h b/googletest/include/gtest/internal/gtest-internal.h
index 08531d8c..918fd4dd 100644
--- a/googletest/include/gtest/internal/gtest-internal.h
+++ b/googletest/include/gtest/internal/gtest-internal.h
@@ -825,6 +825,16 @@ struct GTEST_API_ ConstCharPtr {
   const char* value;
 };
 
+// Helper for declaring std::string within 'if' statement
+// in pre C++17 build environment.
+struct GTEST_API_ TrueWithString {
+  TrueWithString() = default;
+  explicit TrueWithString(const char* str) : value(str) {}
+  explicit TrueWithString(const std::string& str) : value(str) {}
+  explicit operator bool() const { return true; }
+  std::string value;
+};
+
 // A simple Linear Congruential Generator for generating random
 // numbers with a uniform distribution.  Unlike rand() and srand(), it
 // doesn't use global state (and therefore can't interfere with user
@@ -1335,19 +1345,37 @@ constexpr bool InstantiateTypedTestCase_P_IsDeprecated() { return true; }
     GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__): \
       fail(gtest_msg.value)
 
+#if GTEST_HAS_EXCEPTIONS
+
+#define GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_() \
+  catch (std::exception const& e) { \
+    gtest_msg.value = "it throws std::exception-derived exception with description: \""; \
+    gtest_msg.value += e.what(); \
+    gtest_msg.value += "\"."; \
+    goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
+  }
+
+#else // GTEST_HAS_EXCEPTIONS
+
+#define GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_()
+
+#endif  // GTEST_HAS_EXCEPTIONS
+
 #define GTEST_TEST_NO_THROW_(statement, fail) \
   GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
+  if (::testing::internal::TrueWithString gtest_msg{}) { \
     try { \
       GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
     } \
+    GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_() \
     catch (...) { \
+      gtest_msg.value = "it throws."; \
       goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
     } \
   } else \
     GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__): \
-      fail("Expected: " #statement " doesn't throw an exception.\n" \
-           "  Actual: it throws.")
+      fail(("Expected: " #statement " doesn't throw an exception.\n" \
+            "  Actual: " + gtest_msg.value).c_str())
 
 #define GTEST_TEST_ANY_THROW_(statement, fail) \
   GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
diff --git a/googletest/test/gtest_unittest.cc b/googletest/test/gtest_unittest.cc
index 2b00b70a..2496c59d 100644
--- a/googletest/test/gtest_unittest.cc
+++ b/googletest/test/gtest_unittest.cc
@@ -3351,6 +3351,9 @@ TEST_F(SingleEvaluationTest, OtherCases) {
 void ThrowAnInteger() {
   throw 1;
 }
+void ThrowRuntimeError(const char* what) {
+  throw std::runtime_error(what);
+}
 
 // Tests that assertion arguments are evaluated exactly once.
 TEST_F(SingleEvaluationTest, ExceptionTests) {
@@ -3830,6 +3833,11 @@ TEST(AssertionTest, ASSERT_NO_THROW) {
   EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowAnInteger()),
                        "Expected: ThrowAnInteger() doesn't throw an exception."
                        "\n  Actual: it throws.");
+  EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowRuntimeError("A description")),
+                       "Expected: ThrowRuntimeError(\"A description\") "
+                       "doesn't throw an exception.\n  "
+                       "Actual: it throws std::exception-derived exception "
+                       "with description: \"A description\".");
 }
 
 // Tests ASSERT_ANY_THROW.
@@ -4567,6 +4575,11 @@ TEST(ExpectTest, EXPECT_NO_THROW) {
   EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowAnInteger()),
                           "Expected: ThrowAnInteger() doesn't throw an "
                           "exception.\n  Actual: it throws.");
+  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowRuntimeError("A description")),
+                          "Expected: ThrowRuntimeError(\"A description\") "
+                          "doesn't throw an exception.\n  "
+                          "Actual: it throws std::exception-derived exception "
+                          "with description: \"A description\".");
 }
 
 // Tests EXPECT_ANY_THROW.