QGAL (Test): redundant anchors shouldn't harm simplification

Adds a simple test to check whether redundant anchors avoid
simplification to happen. In this case, the use of addCornerAnchors
generate redundant anchors.

Signed-off-by: Caio Marcelo de Oliveira Filho <caio.oliveira@openbossa.org>
Reviewed-by: Eduardo M. Fleury <eduardo.fleury@openbossa.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
index 8b52674cff..c7ed309a2b 100644
--- a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
+++ b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
@@ -84,6 +84,7 @@ private slots:
     void simplifiableUnfeasible();
     void simplificationVsOrder();
     void parallelSimplificationOfCenter();
+    void simplificationVsRedundance();
 };
 
 class RectWidget : public QGraphicsWidget
@@ -1827,5 +1828,43 @@ void tst_QGraphicsAnchorLayout::parallelSimplificationOfCenter()
     QCOMPARE(b->geometry(), QRectF(20, 0, 20, 10));
 }
 
+/*
+    Test whether redundance of anchors (in this case by using addCornerAnchors), will
+    prevent simplification to take place when it should.
+*/
+void tst_QGraphicsAnchorLayout::simplificationVsRedundance()
+{
+    QSizeF min(10, 10);
+    QSizeF pref(20, 10);
+    QSizeF max(50, 30);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "A");
+    QGraphicsWidget *b = createItem(min, pref, max, "B");
+    QGraphicsWidget *c = createItem(min, pref, max, "C");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+
+    l->addCornerAnchors(a, Qt::TopLeftCorner, l, Qt::TopLeftCorner);
+    l->addCornerAnchors(a, Qt::BottomLeftCorner, l, Qt::BottomLeftCorner);
+
+    l->addCornerAnchors(b, Qt::TopLeftCorner, a, Qt::TopRightCorner);
+    l->addCornerAnchors(b, Qt::TopRightCorner, l, Qt::TopRightCorner);
+
+    l->addCornerAnchors(c, Qt::TopLeftCorner, b, Qt::BottomLeftCorner);
+    l->addCornerAnchors(c, Qt::BottomLeftCorner, a, Qt::BottomRightCorner);
+    l->addCornerAnchors(c, Qt::TopRightCorner, b, Qt::BottomRightCorner);
+    l->addCornerAnchors(c, Qt::BottomRightCorner, l, Qt::BottomRightCorner);
+
+    l->effectiveSizeHint(Qt::MinimumSize);
+
+    QCOMPARE(layoutHasConflict(l), false);
+
+    if (!hasSimplification)
+        QEXPECT_FAIL("", "Test depends on simplification.", Abort);
+
+    QCOMPARE(usedSimplex(l, Qt::Horizontal), false);
+    QCOMPARE(usedSimplex(l, Qt::Vertical), false);
+}
+
 QTEST_MAIN(tst_QGraphicsAnchorLayout)
 #include "tst_qgraphicsanchorlayout.moc"