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// Copyright (c) 2013, Kenton Varda <temporal@gmail.com>
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "exception.h"
#include "debug.h"
#include <gtest/gtest.h>
namespace kj {
namespace _ { // private
namespace {
TEST(Exception, RunCatchingExceptions) {
bool recovered = false;
Maybe<Exception> e = kj::runCatchingExceptions([&]() {
KJ_FAIL_ASSERT("foo") {
break;
}
recovered = true;
});
#if KJ_NO_EXCEPTIONS
EXPECT_TRUE(recovered);
#else
EXPECT_FALSE(recovered);
#endif
KJ_IF_MAYBE(ex, e) {
EXPECT_EQ("foo", ex->getDescription());
} else {
ADD_FAILURE() << "Expected exception";
}
}
class ThrowingDestructor: public UnwindDetector {
public:
~ThrowingDestructor() noexcept(false) {
catchExceptionsIfUnwinding([]() {
KJ_FAIL_ASSERT("this is a test, not a real bug") { break; }
});
}
};
TEST(Exception, UnwindDetector) {
// If no other exception is happening, ThrowingDestructor's destructor throws one.
Maybe<Exception> e = kj::runCatchingExceptions([&]() {
ThrowingDestructor t;
});
KJ_IF_MAYBE(ex, e) {
EXPECT_EQ("this is a test, not a real bug", ex->getDescription());
} else {
ADD_FAILURE() << "Expected exception";
}
// If another exception is happening, ThrowingDestructor's destructor's exception is squelched.
e = kj::runCatchingExceptions([&]() {
ThrowingDestructor t;
KJ_FAIL_ASSERT("baz") {
break;
}
});
KJ_IF_MAYBE(ex, e) {
EXPECT_EQ("baz", ex->getDescription());
} else {
ADD_FAILURE() << "Expected exception";
}
}
TEST(Exception, ExceptionCallbackMustBeOnStack) {
#if KJ_NO_EXCEPTIONS
EXPECT_DEATH_IF_SUPPORTED(new ExceptionCallback, "must be allocated on the stack");
#else
EXPECT_ANY_THROW(new ExceptionCallback);
#endif
}
#if !KJ_NO_EXCEPTIONS
TEST(Exception, ScopeSuccessFail) {
bool success = false;
bool failure = false;
{
KJ_ON_SCOPE_SUCCESS(success = true);
KJ_ON_SCOPE_FAILURE(failure = true);
EXPECT_FALSE(success);
EXPECT_FALSE(failure);
}
EXPECT_TRUE(success);
EXPECT_FALSE(failure);
success = false;
failure = false;
try {
KJ_ON_SCOPE_SUCCESS(success = true);
KJ_ON_SCOPE_FAILURE(failure = true);
EXPECT_FALSE(success);
EXPECT_FALSE(failure);
throw 1;
} catch (int) {}
EXPECT_FALSE(success);
EXPECT_TRUE(failure);
}
#endif
} // namespace
} // namespace _ (private)
} // namespace kj