From 169f1beaf55770c2a26d76ad9a63dfd3474cff91 Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macieira@intel.com>
Date: Tue, 26 Apr 2016 21:20:11 -0700
Subject: Move QElapsedTimer to src/corelib/kernel

It's really a kernel functionality, as it implements really low-level
functionality and it's used by the event dispatcher. It was in tools/
only because QTime is.

QDeadlineTimer is also coming to kernel/.

Change-Id: Ifea6e497f11a461db432ffff14491c6d9b839eb0
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
---
 .../kernel/qelapsedtimer/tst_qelapsedtimer.cpp     | 139 +++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 tests/auto/corelib/kernel/qelapsedtimer/tst_qelapsedtimer.cpp

(limited to 'tests/auto/corelib/kernel/qelapsedtimer/tst_qelapsedtimer.cpp')

diff --git a/tests/auto/corelib/kernel/qelapsedtimer/tst_qelapsedtimer.cpp b/tests/auto/corelib/kernel/qelapsedtimer/tst_qelapsedtimer.cpp
new file mode 100644
index 0000000000..9db001c37d
--- /dev/null
+++ b/tests/auto/corelib/kernel/qelapsedtimer/tst_qelapsedtimer.cpp
@@ -0,0 +1,139 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/QString>
+#include <QtCore/QTime>
+#include <QtCore/QElapsedTimer>
+#include <QtTest/QtTest>
+
+static const int minResolution = 50; // the minimum resolution for the tests
+
+QDebug operator<<(QDebug s, const QElapsedTimer &t)
+{
+    s.nospace() << "(" << t.msecsSinceReference() << ")";
+    return s.space();
+}
+
+class tst_QElapsedTimer : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void statics();
+    void validity();
+    void basics();
+    void elapsed();
+};
+
+void tst_QElapsedTimer::statics()
+{
+    qDebug() << "Clock type is" << QElapsedTimer::clockType();
+    qDebug() << "Said clock is" << (QElapsedTimer::isMonotonic() ? "monotonic" : "not monotonic");
+    QElapsedTimer t;
+    t.start();
+    qDebug() << "Current time is" << t.msecsSinceReference();
+}
+
+void tst_QElapsedTimer::validity()
+{
+    QElapsedTimer t;
+
+    QVERIFY(!t.isValid()); // non-POD now, it should always start invalid
+
+    t.start();
+    QVERIFY(t.isValid());
+
+    t.invalidate();
+    QVERIFY(!t.isValid());
+}
+
+void tst_QElapsedTimer::basics()
+{
+    QElapsedTimer t1;
+    t1.start();
+
+    QVERIFY(t1.msecsSinceReference() != 0);
+
+    QCOMPARE(t1, t1);
+    QVERIFY(!(t1 != t1));
+    QVERIFY(!(t1 < t1));
+    QCOMPARE(t1.msecsTo(t1), qint64(0));
+    QCOMPARE(t1.secsTo(t1), qint64(0));
+
+    quint64 value1 = t1.msecsSinceReference();
+    qDebug() << "value1:" << value1 << "t1:" << t1;
+    qint64 nsecs = t1.nsecsElapsed();
+    qint64 elapsed = t1.restart();
+    QVERIFY(elapsed < minResolution);
+    QVERIFY(nsecs / 1000000 < minResolution);
+
+    quint64 value2 = t1.msecsSinceReference();
+    qDebug() << "value2:" << value2 << "t1:" << t1
+             << "elapsed:" << elapsed << "nsecs:" << nsecs;
+    // in theory, elapsed == value2 - value1
+
+    // However, since QElapsedTimer keeps internally the full resolution,
+    // we have here a rounding error due to integer division
+    QVERIFY(qAbs(elapsed - qint64(value2 - value1)) <= 1);
+}
+
+void tst_QElapsedTimer::elapsed()
+{
+    QElapsedTimer t1;
+    t1.start();
+
+    QTest::qSleep(4*minResolution);
+    QElapsedTimer t2;
+    t2.start();
+
+    QVERIFY(t1 != t2);
+    QVERIFY(!(t1 == t2));
+    QVERIFY(t1 < t2);
+    QVERIFY(t1.msecsTo(t2) > 0);
+
+    QVERIFY(t1.nsecsElapsed() > 0);
+    QVERIFY(t1.elapsed() > 0);
+    // the number of elapsed nanoseconds and milliseconds should match
+    QVERIFY(t1.nsecsElapsed() - t1.elapsed() * 1000000 < 1000000);
+    QVERIFY(t1.hasExpired(minResolution));
+    QVERIFY(!t1.hasExpired(8*minResolution));
+    QVERIFY(!t2.hasExpired(minResolution));
+
+    QVERIFY(!t1.hasExpired(-1));
+    QVERIFY(!t2.hasExpired(-1));
+
+    qint64 elapsed = t1.restart();
+    QVERIFY(elapsed > 3*minResolution);
+    QVERIFY(elapsed < 5*minResolution);
+    qint64 diff = t2.msecsTo(t1);
+    QVERIFY(diff < minResolution);
+}
+
+QTEST_MAIN(tst_QElapsedTimer);
+
+#include "tst_qelapsedtimer.moc"
-- 
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