Remove Q_ASSERT's in qitemview autotest

Rather than aborting in debug builds and failing silently in release
builds, report a meaningful warning message and return an appropriate
value to indicate the error.

Change-Id: I0ceb0a0bfaef34cc6127d768cc75ecfc5a24e3c9
Task-number: QTBUG-17582
Reviewed-by: Rohan McGovern
(cherry picked from commit 7cb0a3baeb361c9909e8ab2caf436e8e44b6a3b6)

1 files changed, 53 insertions, 12 deletions

diff --git a/tests/auto/qitemview/tst_qitemview.cpp b/tests/auto/qitemview/tst_qitemview.cpp
index c987c8f267..fa8367e145 100644
--- a/tests/auto/qitemview/tst_qitemview.cpp
+++ b/tests/auto/qitemview/tst_qitemview.cpp
@@ -148,12 +148,18 @@ public:
     CheckerModel() : QStandardItemModel() {};
 
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole ) const {
-        Q_ASSERT(index.isValid());
+        if (!index.isValid()) {
+            qWarning("%s: index is not valid", Q_FUNC_INFO);
+            return QVariant();
+        }
         return QStandardItemModel::data(index, role);
     };
 
     Qt::ItemFlags flags(const QModelIndex & index) const {
-        Q_ASSERT(index.isValid());
+        if (!index.isValid()) {
+            qWarning("%s: index is not valid", Q_FUNC_INFO);
+            return Qt::ItemFlags();
+        }
         if (index.row() == 2 || index.row() == rowCount() - 3
             || index.column() == 2 || index.column() == columnCount() - 3) {
             Qt::ItemFlags f = QStandardItemModel::flags(index);
@@ -164,14 +170,26 @@ public:
     };
 
     QModelIndex parent ( const QModelIndex & child ) const {
-        Q_ASSERT(child.isValid());
+        if (!child.isValid()) {
+            qWarning("%s: child index is not valid", Q_FUNC_INFO);
+            return QModelIndex();
+        }
         return QStandardItemModel::parent(child);
     };
 
     QVariant headerData ( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const {
-        Q_ASSERT(section >= 0);
-        if (orientation == Qt::Horizontal) { Q_ASSERT(section <= columnCount());};
-        if (orientation == Qt::Vertical) { Q_ASSERT(section <= rowCount());};
+        if (orientation == Qt::Horizontal
+            && (section < 0 || section > columnCount())) {
+            qWarning("%s: invalid section %d, must be in range 0..%d",
+                     Q_FUNC_INFO, section, columnCount());
+            return QVariant();
+        }
+        if (orientation == Qt::Vertical
+            && (section < 0 || section > rowCount())) {
+            qWarning("%s: invalid section %d, must be in range 0..%d",
+                     Q_FUNC_INFO, section, rowCount());
+            return QVariant();
+        }
         return QStandardItemModel::headerData(section, orientation, role);
     }
 
@@ -180,23 +198,46 @@ public:
     };
 
     bool setData ( const QModelIndex & index, const QVariant & value, int role = Qt::EditRole ) {
-        Q_ASSERT(index.isValid());
+        if (!index.isValid()) {
+            qWarning("%s: index is not valid", Q_FUNC_INFO);
+            return false;
+        }
         return QStandardItemModel::setData(index, value, role);
     }
 
     void sort( int column, Qt::SortOrder order = Qt::AscendingOrder ) {
-        Q_ASSERT(column >= 0 && column <= columnCount());
-        QStandardItemModel::sort(column, order);
+        if (column < 0 || column > columnCount())
+            qWarning("%s: invalid column %d, must be in range 0..%d",
+                     Q_FUNC_INFO, column, columnCount());
+        else
+            QStandardItemModel::sort(column, order);
     };
 
     QModelIndexList match ( const QModelIndex & start, int role, const QVariant & value, int hits = 1, Qt::MatchFlags flags = Qt::MatchFlags( Qt::MatchStartsWith | Qt::MatchWrap ) ) const {
-        Q_ASSERT(hits > 0);
-        Q_ASSERT(value.isValid());
+        if (hits <= 0) {
+            qWarning("%s: hits must be greater than zero", Q_FUNC_INFO);
+            return QModelIndexList();
+        }
+        if (!value.isValid()) {
+            qWarning("%s: value is not valid", Q_FUNC_INFO);
+            return QModelIndexList();
+        }
         return QAbstractItemModel::match(start, role, value, hits, flags);
     };
 
     bool setHeaderData ( int section, Qt::Orientation orientation, const QVariant & value, int role = Qt::EditRole ) {
-        Q_ASSERT(section >= 0);
+        if (orientation == Qt::Horizontal
+            && (section < 0 || section > columnCount())) {
+            qWarning("%s: invalid section %d, must be in range 0..%d",
+                     Q_FUNC_INFO, section, columnCount());
+            return false;
+        }
+        if (orientation == Qt::Vertical
+            && (section < 0 || section > rowCount())) {
+            qWarning("%s: invalid section %d, must be in range 0..%d",
+                     Q_FUNC_INFO, section, rowCount());
+            return false;
+        }
         return QAbstractItemModel::setHeaderData(section, orientation, value, role);
     };
 };