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authorJan-Arve Sæther <jan-arve.saether@nokia.com>2009-09-23 14:33:33 (GMT)
committerJan-Arve Sæther <jan-arve.saether@nokia.com>2009-09-23 14:45:24 (GMT)
commitf4c948dde1159b3a04a507781f1e0f89bd4b3b37 (patch)
tree6160f9ba611bec95f1af1347e5a2cf189d3baf89 /tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
parenta90629bf80c1635226b42c299238878c8e6847ec (diff)
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Add test for to see if the layout is stable if it has several solutions.
Currently this fails, so we have to use QEXPECT_FAIL.
Diffstat (limited to 'tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp')
-rw-r--r--tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp65
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;