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28 | |
29 | #include <QtCore/QString> |
30 | #include <QtCore/QTime> |
31 | #include <QtCore/QElapsedTimer> |
32 | #include <QtTest/QtTest> |
33 | |
34 | static const int minResolution = 100; // the minimum resolution for the tests |
35 | |
36 | QDebug operator<<(QDebug s, const QElapsedTimer &t) |
37 | { |
38 | s.nospace() << "(" << t.msecsSinceReference() << ")" ; |
39 | return s.space(); |
40 | } |
41 | |
42 | class tst_QElapsedTimer : public QObject |
43 | { |
44 | Q_OBJECT |
45 | |
46 | private Q_SLOTS: |
47 | void statics(); |
48 | void validity(); |
49 | void basics(); |
50 | void elapsed(); |
51 | void msecsTo(); |
52 | }; |
53 | |
54 | void tst_QElapsedTimer::statics() |
55 | { |
56 | qDebug() << "Clock type is" << QElapsedTimer::clockType(); |
57 | qDebug() << "Said clock is" << (QElapsedTimer::isMonotonic() ? "monotonic" : "not monotonic" ); |
58 | QElapsedTimer t; |
59 | t.start(); |
60 | qDebug() << "Current time is" << t.msecsSinceReference(); |
61 | } |
62 | |
63 | void tst_QElapsedTimer::validity() |
64 | { |
65 | QElapsedTimer t; |
66 | |
67 | QVERIFY(!t.isValid()); // non-POD now, it should always start invalid |
68 | |
69 | t.start(); |
70 | QVERIFY(t.isValid()); |
71 | |
72 | t.invalidate(); |
73 | QVERIFY(!t.isValid()); |
74 | } |
75 | |
76 | void tst_QElapsedTimer::basics() |
77 | { |
78 | QElapsedTimer t1; |
79 | t1.start(); |
80 | |
81 | QVERIFY(t1.msecsSinceReference() != 0); |
82 | |
83 | QCOMPARE(t1, t1); |
84 | QVERIFY(!(t1 != t1)); |
85 | QVERIFY(!(t1 < t1)); |
86 | QCOMPARE(t1.msecsTo(t1), qint64(0)); |
87 | QCOMPARE(t1.secsTo(t1), qint64(0)); |
88 | |
89 | quint64 value1 = t1.msecsSinceReference(); |
90 | qDebug() << "value1:" << value1 << "t1:" << t1; |
91 | qint64 nsecs = t1.nsecsElapsed(); |
92 | qint64 elapsed = t1.restart(); |
93 | QVERIFY(elapsed < minResolution); |
94 | QVERIFY(nsecs / 1000000 < minResolution); |
95 | |
96 | quint64 value2 = t1.msecsSinceReference(); |
97 | qDebug() << "value2:" << value2 << "t1:" << t1 |
98 | << "elapsed:" << elapsed << "nsecs:" << nsecs; |
99 | // in theory, elapsed == value2 - value1 |
100 | |
101 | // However, since QElapsedTimer keeps internally the full resolution, |
102 | // we have here a rounding error due to integer division |
103 | QVERIFY(qAbs(elapsed - qint64(value2 - value1)) <= 1); |
104 | } |
105 | |
106 | void tst_QElapsedTimer::elapsed() |
107 | { |
108 | QElapsedTimer t1; |
109 | t1.start(); |
110 | |
111 | QTest::qSleep(ms: 2*minResolution); |
112 | |
113 | auto nsecs = t1.nsecsElapsed(); |
114 | auto msecs = t1.elapsed(); |
115 | QVERIFY(nsecs > 0); |
116 | QVERIFY(msecs > 0); |
117 | // the number of elapsed nanoseconds and milliseconds should match |
118 | QVERIFY(nsecs - msecs * 1000000 < 1000000); |
119 | |
120 | if (msecs > 8 * minResolution) |
121 | QSKIP("Sampling timer took too long, aborting test" ); |
122 | |
123 | QVERIFY(t1.hasExpired(minResolution)); |
124 | QVERIFY(!t1.hasExpired(8*minResolution)); |
125 | QVERIFY(!t1.hasExpired(-1)); |
126 | |
127 | qint64 elapsed = t1.restart(); |
128 | QVERIFY(elapsed >= msecs); |
129 | QVERIFY(elapsed < msecs + 3*minResolution); |
130 | } |
131 | |
132 | void tst_QElapsedTimer::msecsTo() |
133 | { |
134 | QElapsedTimer t1; |
135 | t1.start(); |
136 | QTest::qSleep(ms: minResolution); |
137 | QElapsedTimer t2; |
138 | t2.start(); |
139 | |
140 | QVERIFY(t1 != t2); |
141 | QVERIFY(!(t1 == t2)); |
142 | QVERIFY(t1 < t2); |
143 | |
144 | auto diff = t1.msecsTo(other: t2); |
145 | QVERIFY2(diff > 0, QString("difference t1 and t2 is %1" ).arg(diff).toLatin1()); |
146 | diff = t2.msecsTo(other: t1); |
147 | QVERIFY2(diff < 0, QString("difference t2 and t1 is %1" ).arg(diff).toLatin1()); |
148 | } |
149 | |
150 | QTEST_MAIN(tst_QElapsedTimer); |
151 | |
152 | #include "tst_qelapsedtimer.moc" |
153 | |