File: tracing.cpp

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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*
 Copyright (C) 2005 StatPro Italia srl

 This file is part of QuantLib, a free-software/open-source library
 for financial quantitative analysts and developers - http://quantlib.org/

 QuantLib is free software: you can redistribute it and/or modify it
 under the terms of the QuantLib license.  You should have received a
 copy of the license along with this program; if not, please email
 <quantlib-dev@lists.sf.net>. The license is also available online at
 <http://quantlib.org/license.shtml>.

 This program is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the license for more details.
*/

#include "toplevelfixture.hpp"
#include "utilities.hpp"
#include <ql/utilities/tracing.hpp>
#include <sstream>
#include <iostream>

using namespace QuantLib;
using namespace boost::unit_test_framework;

BOOST_FIXTURE_TEST_SUITE(QuantLibTests, TopLevelFixture)

BOOST_AUTO_TEST_SUITE(TracingTests)

class TestCaseCleaner { // NOLINT(cppcoreguidelines-special-member-functions)
  public:
    TestCaseCleaner() = default;
    ~TestCaseCleaner() {
        QL_TRACE_ON(std::cerr);
    }
};

#if defined(__clang__) && __clang_major__ >= 14
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-but-set-variable"
#endif

void testTraceOutput(bool enable,
#if defined(QL_ENABLE_TRACING)
                     const std::string& result) {
#else
                     const std::string&) {
#endif

    TestCaseCleaner cleaner;

    std::ostringstream output;
    if (enable)
        QL_TRACE_ENABLE;
    else
        QL_TRACE_DISABLE;
    QL_TRACE_ON(output);
    int i = 42;
    QL_TRACE_VARIABLE(i);
    i++;

    #if defined(QL_ENABLE_TRACING)
    std::string expected = result;
    #else
    std::string expected;
    #endif
    if (output.str() != expected) {
        BOOST_FAIL("wrong trace:\n"
                   "    expected:\n"
                   "\""+ expected + "\"\n"
                   "    written:\n"
                   "\""+ output.str() + "\"");
    }
}

#if defined(__clang__) && __clang_major__ >= 14
#pragma clang diagnostic pop
#endif


BOOST_AUTO_TEST_CASE(testOutput) {

    BOOST_TEST_MESSAGE("Testing tracing...");

    testTraceOutput(false, "");
    testTraceOutput(true,  "trace[0]: i = 42\n");
}

BOOST_AUTO_TEST_SUITE_END()

BOOST_AUTO_TEST_SUITE_END()