catch2/projects/SelfTest/ExceptionTests.cpp

/*
 *  Created by Phil on 09/11/2010.
 *  Copyright 2010 Two Blue Cubes Ltd. All rights reserved.
 *
 *  Distributed under the Boost Software License, Version 1.0. (See accompanying
 *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 */

#include "catch.hpp"

#include <string>
#include <stdexcept>

namespace
{
    inline int thisThrows()
    {
		if( Catch::isTrue( true ) )
		    throw std::domain_error( "expected exception" );
		return 1;
    }

    int thisDoesntThrow()
    {
        return 0;
    }
}

namespace ExceptionTests
{
    TEST_CASE( "When checked exceptions are thrown they can be expected or unexpected", "" )
    {
        REQUIRE_THROWS_AS( thisThrows(), std::domain_error );
        REQUIRE_NOTHROW( thisDoesntThrow() );
        REQUIRE_THROWS( thisThrows() );
    }

    TEST_CASE( "Expected exceptions that don't throw or unexpected exceptions fail the test", "[.][failing]" )
    {
        CHECK_THROWS_AS( thisThrows(), std::string );
        CHECK_THROWS_AS( thisDoesntThrow(), std::domain_error );
        CHECK_NOTHROW( thisThrows() );
    }

    TEST_CASE( "When unchecked exceptions are thrown directly they are always failures", "[.][failing]" )
    {
	    if( Catch::isTrue( true ) )
	        throw std::domain_error( "unexpected exception" );
    }

    TEST_CASE( "An unchecked exception reports the line of the last assertion", "[.][failing]" )
    {
        CHECK( 1 == 1 );
	    if( Catch::isTrue( true ) )
	        throw std::domain_error( "unexpected exception" );
    }
    TEST_CASE( "When unchecked exceptions are thrown from sections they are always failures", "[.][failing]" )
    {
        SECTION( "section name", "" )
        {
		    if( Catch::isTrue( true ) )
			    throw std::domain_error( "unexpected exception" );
        }
    }

    TEST_CASE( "When unchecked exceptions are thrown from functions they are always failures", "[.][failing]" )
    {
        CHECK( thisThrows() == 0 );
    }

    TEST_CASE( "When unchecked exceptions are thrown, but caught, they do not affect the test", "" )
    {
        try
        {
            throw std::domain_error( "unexpected exception" );
        }
        catch(...)
        {
        }
    }

    class CustomException
    {
    public:
        CustomException( const std::string& msg )
        : m_msg( msg )
        {}
    
        std::string getMessage() const
        {
            return m_msg;
        }
    
    private:
        std::string m_msg;
    };

    CATCH_TRANSLATE_EXCEPTION( CustomException& ex )
    {
        return ex.getMessage();
    }

    CATCH_TRANSLATE_EXCEPTION( double& ex )
    {
        return Catch::toString( ex );
    }

    TEST_CASE("Unexpected custom exceptions can be translated", "[.][failing]" )
    {
	    if( Catch::isTrue( true ) )
	        throw CustomException( "custom exception" );
    }

    inline void throwCustom() {
	    if( Catch::isTrue( true ) )
		    throw CustomException( "custom exception - not std" );
    }

    TEST_CASE( "Custom exceptions can be translated when testing for nothrow", "[.][failing]" )
    {
        REQUIRE_NOTHROW( throwCustom() );
    }

    TEST_CASE( "Custom exceptions can be translated when testing for throwing as something else", "[.][failing]" )
    {
        REQUIRE_THROWS_AS( throwCustom(), std::exception );
    }


    TEST_CASE( "Unexpected exceptions can be translated", "[.][failing]"  )
    {
	    if( Catch::isTrue( true ) )
	        throw double( 3.14 );
    }

    inline int thisFunctionNotImplemented( int ) {
        CATCH_NOT_IMPLEMENTED;
    }

    TEST_CASE( "NotImplemented exception", "" )
    {
        REQUIRE_THROWS( thisFunctionNotImplemented( 7 ) );
    }
}