diff options
| -rw-r--r-- | tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp | 65 |
1 files changed, 59 insertions, 6 deletions
diff --git a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp index 385fb3e..2c4a253 100644 --- a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp +++ b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp @@ -64,6 +64,7 @@ private slots: void example(); void setSpacing(); void hardComplexS60(); + void stability(); void delete_anchor(); void conflicts(); void sizePolicy(); @@ -986,10 +987,26 @@ void tst_QGraphicsAnchorLayout::setSpacing() } -void tst_QGraphicsAnchorLayout::hardComplexS60() +/*! + Taken from "hard" complex case, found at + https://cwiki.nokia.com/S60QTUI/AnchorLayoutComplexCases + + This layout has a special property, since it has two possible solutions for its minimum size. + + For instance, when it is in its minimum size - the layout have two possible solutions: + 1. c.width == 10, e.width == 10 and g.width == 10 + (all others have width 0) + 2. d.width == 10 and g.width == 10 + (all others have width 0) + + It also has several solutions for preferred size. +*/ +static QGraphicsAnchorLayout *createAmbiguousS60Layout() { - // Test for "hard" complex case, taken from wiki - // https://cwiki.nokia.com/S60QTUI/AnchorLayoutComplexCases + QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout; + l->setContentsMargins(0, 0, 0, 0); + l->setSpacing(0); + QSizeF min(0, 10); QSizeF pref(50, 10); QSizeF max(100, 10); @@ -1002,9 +1019,6 @@ void tst_QGraphicsAnchorLayout::hardComplexS60() QGraphicsWidget *f = createItem(min, pref, max, "f"); QGraphicsWidget *g = createItem(min, pref, max, "g"); - QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout; - l->setContentsMargins(0, 0, 0, 0); - //<!-- Trunk --> setAnchor(l, l, Qt::AnchorLeft, a, Qt::AnchorLeft, 10); setAnchor(l, a, Qt::AnchorRight, b, Qt::AnchorLeft, 10); @@ -1034,7 +1048,12 @@ void tst_QGraphicsAnchorLayout::hardComplexS60() setAnchor(l, a, Qt::AnchorBottom, d, Qt::AnchorBottom, 0); setAnchor(l, f, Qt::AnchorBottom, g, Qt::AnchorTop, 0); setAnchor(l, g, Qt::AnchorBottom, l, Qt::AnchorBottom, 0); + return l; +} +void tst_QGraphicsAnchorLayout::hardComplexS60() +{ + QGraphicsAnchorLayout *l = createAmbiguousS60Layout(); QCOMPARE(l->count(), 7); QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window); @@ -1050,6 +1069,40 @@ void tst_QGraphicsAnchorLayout::hardComplexS60() } +void tst_QGraphicsAnchorLayout::stability() +{ + QVector<QRectF> geometries; + geometries.resize(7); + QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window); + bool sameAsPreviousArrangement = true; + // it usually fails after 3-4 iterations + for (int pass = 0; pass < 20 && sameAsPreviousArrangement; ++pass) { + // In case we need to "scramble" the heap allocator to provoke this bug. + //static const int primes[] = {2, 3, 5, 13, 89, 233, 1597, 28657, 514229}; // fibo primes + //const int primeCount = sizeof(primes)/sizeof(int); + //int alloc = primes[pass % primeCount] + pass; + //void *mem = qMalloc(alloc); + //qFree(mem); + QGraphicsAnchorLayout *l = createAmbiguousS60Layout(); + p->setLayout(l); + QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize); + l->setGeometry(QRectF(QPointF(0,0), layoutMinimumSize)); + QApplication::processEvents(); + for (int i = l->count() - 1; i >=0 && sameAsPreviousArrangement; --i) { + QRectF geom = l->itemAt(i)->geometry(); + if (pass != 0) { + sameAsPreviousArrangement = (geometries[i] == geom); + } + geometries[i] = geom; + } + p->setLayout(0); // uninstalls and deletes the layout + QApplication::processEvents(); + } + delete p; + QEXPECT_FAIL("", "The layout have several solutions, but which solution it picks is not stable", Continue); + QCOMPARE(sameAsPreviousArrangement, true); +} + void tst_QGraphicsAnchorLayout::delete_anchor() { QGraphicsScene scene; |