Re: [Boost-users] Boost test, segmentation fault.

Subject: Re: [Boost-users] Boost test, segmentation fault.
From: Matthijs Mohlmann (matthijs_at_[hidden])
Date: 2010-08-27 02:12:36

On Aug 27, 2010, at 12:09 AM, Steven Watanabe wrote:

> AMDG
> 
> Matthijs Mohlmann wrote:
>> First of all:
>> I'm building an application and with that I use Boost test for unit testing. This helped
>> me already to fix some obscure bugs. (I am very happy with boost test)
>> 
>> I have the Master suite test setup in one file and the normal test suites each in one
>> file. This worked very well. Now I have the following test suite which gives me a
>> segmentation fault and I have no idea why:
>> 
>> BOOST_AUTO_TEST_SUITE(ProgramOptions)
>> 
>> BOOST_AUTO_TEST_CASE(ProgramOptions_Valid_Options) {
>> 
>>    // Output
>>    boost::test_tools::output_test_stream output("misc/ProgramOptions_01.output", true);
>> 
>>    // Save output buffer
>>    std::streambuf *strmbuffer;
>>    strmbuffer = std::cout.rdbuf();
>> 
>>    // Redirect the output.
>>    std::cout.rdbuf(output.rdbuf());
>> 
>>    // Redirect output stream so we can do some checks.
>>    printSomething();
>>    BOOST_REQUIRE(output.match_pattern());
>> 
>>    // Now lets process some arguments.
>>    printSomething();
>>    BOOST_REQUIRE(output.match_pattern());
>> 
>>    // Restore output buffer
>>    std::cout.rdbuf(strmbuffer);
>> }
>> 
>> BOOST_AUTO_TEST_SUITE_END()
>> 
>> The function that gets tested:
>> void printSomething() {
>>    std::cout << "Test output" << std::endl;
>> }
>> 
>> If I put the same content 'Test output' in the ProgramOptions_01.output file then everything
>> is fine and executes ok. When putting different content in that file it goes wrong.
>>  
> 
> The problem is that when BOOST_REQUIRE fails, the
> test case immediately aborts, the output buffer is not
> restored, the output_test_stream is destroyed, and
> std::cout is left with a dangling pointer.
> 
> In Christ,
> Steven Watanabe
> 

Right, why couldn't I think of that?

Regards,

Matthijs Möhlmann