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Viewing changes to miral-qt/tests/modules/General/timestamp_test.cpp

  • Committer: Gerry Boland
  • Date: 2016-06-01 22:06:51 UTC
  • mto: This revision was merged to the branch mainline in revision 178.
  • Revision ID: gerry.boland@canonical.com-20160601220651-ge508tffql4e7u7c
Import QtMir code into miral-qt subdirectory. Disabled by default, use -DMIRAL_ENABLE_QT=1 to build.

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miral-qt/tests/modules/General/timestamp_test.cpp
 
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/*
 
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 * Copyright (C) 2014-2015 Canonical, Ltd.
 
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 *
 
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 * This program is free software: you can redistribute it and/or modify it under
 
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 * the terms of the GNU Lesser General Public License version 3, as published by
 
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 * the Free Software Foundation.
 
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 *
 
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 * This program is distributed in the hope that it will be useful, but WITHOUT
 
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 * ANY WARRANTY; without even the implied warranties of MERCHANTABILITY,
 
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 * SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
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 * Lesser General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU Lesser General Public License
 
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
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 */
 
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#include "timestamp.h"
 
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#include <gtest/gtest.h>
 
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#include <gmock/gmock.h>
 
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#include <QCoreApplication>
 
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#include <QDebug>
 
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using namespace qtmir;
 
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class TimestampTest: public ::testing::Test
 
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{
 
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protected:
 
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    virtual void SetUp() {
 
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        resetStartTime(std::chrono::nanoseconds(0));
 
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    }
 
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};
 
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TEST_F(TimestampTest, TestCompressAndUncompress)
 
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{
 
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    using namespace testing;
 
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    std::chrono::time_point<std::chrono::system_clock> now;
 
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    now = std::chrono::system_clock::now();
 
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    auto original_timestamp = now.time_since_epoch();
 
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    qtmir::Timestamp addToTimestamp(0);
 
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    for (int i = 0; i < 100; i++) {
 
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        auto timestamp = original_timestamp + addToTimestamp;
 
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        qtmir::Timestamp compressedTimestamp = qtmir::compressTimestamp<qtmir::Timestamp>(timestamp);
 
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        EXPECT_EQ(addToTimestamp, compressedTimestamp);
 
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        EXPECT_EQ(qtmir::uncompressTimestamp<qtmir::Timestamp>(compressedTimestamp), timestamp);
 
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        addToTimestamp += std::chrono::seconds(1);
 
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    }
 
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}
 
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TEST_F(TimestampTest, TestOverflowWhenExceeding32bitCompression)
 
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{
 
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    using namespace testing;
 
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    std::chrono::time_point<std::chrono::system_clock> now;
 
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    now = std::chrono::system_clock::now();
 
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    auto timestamp = now.time_since_epoch();
 
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    typedef std::chrono::duration<quint32, std::milli> Timestamp32bit;
 
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    // Do first compression. This will result in qield of 0 as seen in TestCompressUncompress
 
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    auto compressedTimestamp = qtmir::compressTimestamp<Timestamp32bit>(timestamp);
 
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    // Add the quint32 limit +1 to get an overflow when we compress the timestamp
 
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    timestamp += Timestamp32bit::max() + std::chrono::nanoseconds(1);
 
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    compressedTimestamp = qtmir::compressTimestamp<Timestamp32bit>(timestamp);
 
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    EXPECT_EQ(0, compressedTimestamp.count());
 
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    // ensure the uncompression will yields the original timestamp
 
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    EXPECT_EQ(qtmir::uncompressTimestamp<Timestamp32bit>(compressedTimestamp), timestamp);
 
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}
 
 
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