Boost test expected throw

Question

I have a test on a code part that needs to throw an exception, but using BOOST_CHECK_THROW still crashes the test. Here is the test:

#include <boost/test/unit_test.hpp>

#include "tools/CQueueMessage.hpp"

class TestMessage
{
public:
    std::string m_message1;
    std::string m_message2;
    std::string m_messageEmpty;
    std::string m_messageEmptyJson;

    TestMessage()
    :   m_message1("{\"photo\":{\"name\":\"pic\",\"extension\":\"jpg\"}}"),
        m_message2("{\"photo\":{\"name\":\"pic\",\"extension\":\"png\"}}"),
        m_messageEmpty(""), m_messageEmptyJson("{}") {}
    ~TestMessage() {}
};

BOOST_FIXTURE_TEST_CASE(message2send, TestMessage)
{
    QueueMessage qmsg1(m_message1);
    BOOST_CHECK_EQUAL(qmsg1.messageToBeSent(), "{\"photo\":{\"name\":\"pic\",\"extension\":\"jpg\"}}");

    QueueMessage qmsg2(m_message2);
    BOOST_CHECK_EQUAL(qmsg2.messageToBeSent(), "{\"photo\":{\"name\":\"pic\",\"extension\":\"png\"}}");

    BOOST_CHECK_THROW(QueueMessage qmsg3(m_messageEmpty), QueueMessageException)
//  QueueMessage qmsg4(m_messageEmptyJson);
}

The QueueMessage class constructor is throwing a QueueMessageException if the message is empty or if it is an empty json. My problem is that this test is printing:

Running 1 test case...
unknown location(0): fatal error in "message2send": std::exception: Bad message format

*** 1 failure detected in test suite "main"
*** Exited with return code: 201 ***

How can I verify that the exception is thrown?

---

This is the constructor:

QueueMessage(CString& messageIn)
{
    std::stringstream ss;
    ss << messageIn;
    PTree pt;
    json::read_json(ss, pt);
    std::string photo = pt.get< std::string >("photo");
    if (photo.empty())
    {
        throw QueueMessageException("Bad message format"); // in debugging it arrives here
    }
}

Answer 1

My psychic debugging powers tell me that your constructor is NOT in fact throwing QueueMessageException. It looks like it (through the function message2send) is throwing std::exception or a different child of it.