esp-idf/components/cxx/test/test_rtti.cpp

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2021-05-16 21:43:02 -04:00
/*
* SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <typeinfo>
#include "unity.h"
#ifdef CONFIG_COMPILER_CXX_RTTI
using namespace std;
class Base {
public:
virtual ~Base() {} ;
virtual char name() = 0;
};
class DerivedA : public Base {
public:
char name() override
{
return 'A';
}
};
class DerivedB : public Base {
public:
char name() override
{
return 'B';
}
};
TEST_CASE("unsuccessful dynamic cast on pointer returns nullptr", "[cxx]")
{
Base *base = new DerivedA();
DerivedB *derived = dynamic_cast<DerivedB*>(base);
TEST_ASSERT_EQUAL(derived, nullptr);
delete base;
derived = nullptr;
}
TEST_CASE("dynamic cast works", "[cxx]")
{
Base *base = new DerivedA();
DerivedA *derived = dynamic_cast<DerivedA*>(base);
TEST_ASSERT_EQUAL(derived, base);
delete base;
}
TEST_CASE("typeid of dynamic objects works", "[cxx]")
{
Base *base = new DerivedA();
DerivedA *derived = dynamic_cast<DerivedA*>(base);
TEST_ASSERT_EQUAL(typeid(*derived).hash_code(), typeid(*base).hash_code());
TEST_ASSERT_EQUAL(typeid(*derived).hash_code(), typeid(DerivedA).hash_code());
delete base;
derived = nullptr;
}
int dummy_function1(int arg1, double arg2);
int dummy_function2(int arg1, double arg2);
TEST_CASE("typeid of function works", "[cxx]")
{
TEST_ASSERT_EQUAL(typeid(dummy_function1).hash_code(), typeid(dummy_function2).hash_code());
}
#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
TEST_CASE("unsuccessful dynamic cast on reference throws exception", "[cxx]")
{
bool thrown = false;
DerivedA derived_a;
Base &base = derived_a;
try {
DerivedB &derived_b = dynamic_cast<DerivedB&>(base);
derived_b.name(); // suppress warning
} catch (bad_cast &e) {
thrown = true;
}
TEST_ASSERT(thrown);
}
TEST_CASE("typeid on nullptr throws bad_typeid", "[cxx]")
{
Base *base = nullptr;
size_t hash = 0;
bool thrown = false;
try {
hash = typeid(*base).hash_code();
} catch (bad_typeid &e) {
thrown = true;
}
TEST_ASSERT_EQUAL(0, hash);
TEST_ASSERT(thrown);
}
#endif // CONFIG_COMPILER_CXX_EXCEPTIONS
#endif // CONFIG_COMPILER_CXX_RTTI