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Make EXPECT_THROW print the actual exception type on the "threw the wrong exception type" case if the actual exception is a std::exception

PiperOrigin-RevId: 211519873
This commit is contained in:
Abseil Team 2018-09-04 17:00:34 -04:00 committed by Gennadiy Civil
parent 51cabc168f
commit dbd55366c8
2 changed files with 53 additions and 31 deletions
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75
googletest/include/gtest/internal/gtest-internal.h
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@ -771,13 +771,12 @@ GTEST_API_ bool AlwaysTrue();
// Always returns false.
inline bool AlwaysFalse() { return !AlwaysTrue(); }
// Helper for suppressing false warning from Clang on a const char*
// variable declared in a conditional expression always being NULL in
// the else branch.
struct GTEST_API_ ConstCharPtr {
ConstCharPtr(const char* str) : value(str) {}
// Helper for creating strings in if() statement branches. Always converts to
// true.
struct GTEST_API_ TrueString {
TrueString() {}
operator bool() const { return true; }
const char* value;
std::string value;
};
// A simple Linear Congruential Generator for generating random
@ -1214,31 +1213,45 @@ class NativeArray {
#define GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement) \
if (::testing::internal::AlwaysTrue()) { statement; }
#define GTEST_TEST_THROW_(statement, expected_exception, fail) \
GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
if (::testing::internal::ConstCharPtr gtest_msg = "") { \
bool gtest_caught_expected = false; \
try { \
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
} \
catch (expected_exception const&) { \
gtest_caught_expected = true; \
} \
catch (...) { \
gtest_msg.value = \
"Expected: " #statement " throws an exception of type " \
#expected_exception ".\n Actual: it throws a different type."; \
goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
} \
if (!gtest_caught_expected) { \
gtest_msg.value = \
"Expected: " #statement " throws an exception of type " \
#expected_exception ".\n Actual: it throws nothing."; \
goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
} \
} else \
GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__): \
fail(gtest_msg.value)
#define GTEST_WRONG_EXCEPTION_MESSAGE_(statement, expected_exception) \
"Expected: " #statement " throws an exception of type " #expected_exception \
".\n Actual: it throws "
// The nested try-catch block allows us to catch erroneous exceptions which
// inherit from std::exception and feed what() to the failure description. If
// there was no nested try-catch and expected_exception was std::exception, then
// this would fail to build due to two blocks both catching std::exceptions.
#define GTEST_TEST_THROW_(statement, expected_exception, fail) \
GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
if (::testing::internal::TrueString gtest_msg = \
::testing::internal::TrueString()) { \
bool gtest_caught_expected = false; \
try { \
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
} catch (expected_exception const&) { \
gtest_caught_expected = true; \
} catch (...) { \
try { \
throw; \
} catch (const std::exception& e) { \
gtest_msg.value = std::string(GTEST_WRONG_EXCEPTION_MESSAGE_( \
statement, expected_expression)) + \
e.what() + "."; \
} catch (...) { \
gtest_msg.value = GTEST_WRONG_EXCEPTION_MESSAGE_( \
statement, expected_exception) "a different type."; \
} \
goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
} \
if (!gtest_caught_expected) { \
gtest_msg.value = "Expected: " #statement \
" throws an exception of type " #expected_exception \
".\n Actual: it throws nothing."; \
goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
} \
} else \
GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__) \
: fail(gtest_msg.value.c_str())
#define GTEST_TEST_NO_THROW_(statement, fail) \
GTEST_AMBIGUOUS_ELSE_BLOCKER_ \

9
googletest/test/gtest_unittest.cc
View File

@ -4541,12 +4541,21 @@ TEST(ExpectTest, EXPECT_THROW) {
EXPECT_NONFATAL_FAILURE(EXPECT_THROW(ThrowAnInteger(), bool),
"Expected: ThrowAnInteger() throws an exception of "
"type bool.\n Actual: it throws a different type.");
std::string expected = "what() arg";
EXPECT_NONFATAL_FAILURE(EXPECT_THROW(throw std::out_of_range(expected), bool),
expected);
EXPECT_NONFATAL_FAILURE(
EXPECT_THROW(ThrowNothing(), bool),
"Expected: ThrowNothing() throws an exception of type bool.\n"
" Actual: it throws nothing.");
}
// We need to make sure always to avoid having multiple blocks which catch a
// std::exception
TEST(ExpectTest, EXPECT_THROW_STD_EXCEPTION) {
EXPECT_THROW(throw std::exception(), std::exception);
}
// Tests EXPECT_NO_THROW.
TEST(ExpectTest, EXPECT_NO_THROW) {
EXPECT_NO_THROW(ThrowNothing());