uuid-test.cpp

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/*
 * uuid-test.cpp
 *
 * Copyright (C) 2010  Thomas A. Vaughan
 * All rights reserved.
 *
 * Simple tests of uuid routines
 */

// includes --------------------------------------------------------------------
#include <iostream>

#include "perf/perf.h"
#include "util/uuid.h"



////////////////////////////////////////////////////////////////////////////////
//
//      static helper methods
//
////////////////////////////////////////////////////////////////////////////////

static void
doTest
(
IN int nUUIDs
)
{
        ASSERT(nUUIDs > 0, "bad count: %d", nUUIDs);
        ASSERT(nUUIDs < 1000 * 1000, "too many: %d", nUUIDs);

        SetString seen; // UUIDs we've already seen
        char buffer[eUUID_Length];

        for (int i = 0; i < nUUIDs; ++i) {
                const char * val = generateUUID(buffer);
                ASSERT_THROW(seen.end() == seen.find(val),
                    "generated a duplicate uuid: " << val);
                seen.insert(val);
        }

        int nPrint = 32;
        DPRINTF("Printing first %d uuids...", nPrint);
        SetString::const_iterator i = seen.begin();
        while (nPrint > 0 && seen.end() != i) {
                const char * uuid = i->c_str();
                DPRINTF("  '%s'", uuid);
                ++i;
                --nPrint;
        }
}



////////////////////////////////////////////////////////////////////////////////
//
//      entry point
//
////////////////////////////////////////////////////////////////////////////////

int
main
(
IN int argc,
IN const char * argv[]
)
{
        int retval = 0;
        ASSERT(2 == argc, "Usage: util-uuid-test <nUUIDs>");
        int nUUIDs = atoi(argv[1]);
        DPRINTF("Testing generation of %d UUIDs", nUUIDs);

        try {
                perf::Timer timer("overall timer");

                doTest(nUUIDs);

        } catch (std::exception& e) {
                DPRINTF("Exception: %s", e.what());
                retval = 1;
        }

        perf::dumpTimingSummary(std::cerr);

        return retval;
}