diff options
Diffstat (limited to 'tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp')
| -rw-r--r-- | tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp b/tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp index 6be8ff81cf..1847056de5 100644 --- a/tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp +++ b/tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp @@ -55,6 +55,7 @@ private slots: void addOverflow(); void mulOverflow_data(); void mulOverflow(); + void signedOverflow(); }; void tst_QNumeric::fuzzyCompare_data() @@ -105,6 +106,18 @@ void tst_QNumeric::qNan() QVERIFY(qIsNaN(nan)); QVERIFY(qIsNaN(nan + 1)); QVERIFY(qIsNaN(-nan)); + + Q_STATIC_ASSERT(sizeof(double) == 8); +#ifdef Q_LITTLE_ENDIAN + const uchar bytes[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x7f }; +#else + const uchar bytes[] = { 0x7f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }; +#endif + memcpy(&nan, bytes, 8); + QVERIFY(!qIsFinite(nan)); + QVERIFY(!qIsInf(nan)); + QVERIFY(qIsNaN(nan)); + double inf = qInf(); QVERIFY(inf > 0); QVERIFY(-inf < 0); @@ -366,5 +379,35 @@ void tst_QNumeric::mulOverflow() MulOverflowDispatch<quint64>()(); } +void tst_QNumeric::signedOverflow() +{ + const int minInt = std::numeric_limits<int>::min(); + const int maxInt = std::numeric_limits<int>::max(); + int r; + + QCOMPARE(add_overflow(minInt + 1, int(-1), &r), false); + QCOMPARE(add_overflow(minInt, int(-1), &r), true); + QCOMPARE(add_overflow(minInt, minInt, &r), true); + QCOMPARE(add_overflow(maxInt - 1, int(1), &r), false); + QCOMPARE(add_overflow(maxInt, int(1), &r), true); + QCOMPARE(add_overflow(maxInt, maxInt, &r), true); + + QCOMPARE(sub_overflow(minInt + 1, int(1), &r), false); + QCOMPARE(sub_overflow(minInt, int(1), &r), true); + QCOMPARE(sub_overflow(minInt, maxInt, &r), true); + QCOMPARE(sub_overflow(maxInt - 1, int(-1), &r), false); + QCOMPARE(sub_overflow(maxInt, int(-1), &r), true); + QCOMPARE(sub_overflow(maxInt, minInt, &r), true); + + QCOMPARE(mul_overflow(minInt, int(1), &r), false); + QCOMPARE(mul_overflow(minInt, int(-1), &r), true); + QCOMPARE(mul_overflow(minInt, int(2), &r), true); + QCOMPARE(mul_overflow(minInt, minInt, &r), true); + QCOMPARE(mul_overflow(maxInt, int(1), &r), false); + QCOMPARE(mul_overflow(maxInt, int(-1), &r), false); + QCOMPARE(mul_overflow(maxInt, int(2), &r), true); + QCOMPARE(mul_overflow(maxInt, maxInt, &r), true); +} + QTEST_APPLESS_MAIN(tst_QNumeric) #include "tst_qnumeric.moc" |