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

Subject: Re: [Boost-users] Boost test, segmentation fault.
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-08-26 18:09:03

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