Long live Qt!

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diff --git a/tests/auto/modeltest/modeltest.cpp b/tests/auto/modeltest/modeltest.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtGui/QtGui>
+
+#include "modeltest.h"
+
+#include <QtTest/QtTest>
+#undef Q_ASSERT
+#define Q_ASSERT  QVERIFY
+
+Q_DECLARE_METATYPE ( QModelIndex )
+
+/*!
+    Connect to all of the models signals.  Whenever anything happens recheck everything.
+*/
+ModelTest::ModelTest ( QAbstractItemModel *_model, QObject *parent ) : QObject ( parent ), model ( _model ), fetchingMore ( false )
+{
+    Q_ASSERT ( model );
+
+    connect ( model, SIGNAL ( columnsAboutToBeInserted ( const QModelIndex &, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( columnsAboutToBeRemoved ( const QModelIndex &, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( columnsInserted ( const QModelIndex &, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( columnsRemoved ( const QModelIndex &, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( dataChanged ( const QModelIndex &, const QModelIndex & ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( headerDataChanged ( Qt::Orientation, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( layoutAboutToBeChanged () ), this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( layoutChanged () ), this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( modelReset () ), this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( rowsAboutToBeInserted ( const QModelIndex &, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( rowsAboutToBeRemoved ( const QModelIndex &, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( rowsInserted ( const QModelIndex &, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+    connect ( model, SIGNAL ( rowsRemoved ( const QModelIndex &, int, int ) ),
+              this, SLOT ( runAllTests() ) );
+
+    // Special checks for inserting/removing
+    connect ( model, SIGNAL ( layoutAboutToBeChanged() ),
+              this, SLOT ( layoutAboutToBeChanged() ) );
+    connect ( model, SIGNAL ( layoutChanged() ),
+              this, SLOT ( layoutChanged() ) );
+
+    connect ( model, SIGNAL ( rowsAboutToBeInserted ( const QModelIndex &, int, int ) ),
+              this, SLOT ( rowsAboutToBeInserted ( const QModelIndex &, int, int ) ) );
+    connect ( model, SIGNAL ( rowsAboutToBeRemoved ( const QModelIndex &, int, int ) ),
+              this, SLOT ( rowsAboutToBeRemoved ( const QModelIndex &, int, int ) ) );
+    connect ( model, SIGNAL ( rowsInserted ( const QModelIndex &, int, int ) ),
+              this, SLOT ( rowsInserted ( const QModelIndex &, int, int ) ) );
+    connect ( model, SIGNAL ( rowsRemoved ( const QModelIndex &, int, int ) ),
+              this, SLOT ( rowsRemoved ( const QModelIndex &, int, int ) ) );
+
+    runAllTests();
+}
+
+void ModelTest::runAllTests()
+{
+    if ( fetchingMore )
+        return;
+    nonDestructiveBasicTest();
+    rowCount();
+    columnCount();
+    hasIndex();
+    index();
+    parent();
+    data();
+}
+
+/*!
+    nonDestructiveBasicTest tries to call a number of the basic functions (not all)
+    to make sure the model doesn't outright segfault, testing the functions that makes sense.
+*/
+void ModelTest::nonDestructiveBasicTest()
+{
+    Q_ASSERT ( model->buddy ( QModelIndex() ) == QModelIndex() );
+    model->canFetchMore ( QModelIndex() );
+    Q_ASSERT ( model->columnCount ( QModelIndex() ) >= 0 );
+    Q_ASSERT ( model->data ( QModelIndex() ) == QVariant() );
+    fetchingMore = true;
+    model->fetchMore ( QModelIndex() );
+    fetchingMore = false;
+    Qt::ItemFlags flags = model->flags ( QModelIndex() );
+    Q_ASSERT ( flags == Qt::ItemIsDropEnabled || flags == 0 );
+    model->hasChildren ( QModelIndex() );
+    model->hasIndex ( 0, 0 );
+    model->headerData ( 0, Qt::Horizontal );
+    model->index ( 0, 0 );
+    model->itemData ( QModelIndex() );
+    QVariant cache;
+    model->match ( QModelIndex(), -1, cache );
+    model->mimeTypes();
+    Q_ASSERT ( model->parent ( QModelIndex() ) == QModelIndex() );
+    Q_ASSERT ( model->rowCount() >= 0 );
+    QVariant variant;
+    model->setData ( QModelIndex(), variant, -1 );
+    model->setHeaderData ( -1, Qt::Horizontal, QVariant() );
+    model->setHeaderData ( 999999, Qt::Horizontal, QVariant() );
+    QMap<int, QVariant> roles;
+    model->sibling ( 0, 0, QModelIndex() );
+    model->span ( QModelIndex() );
+    model->supportedDropActions();
+}
+
+/*!
+    Tests model's implementation of QAbstractItemModel::rowCount() and hasChildren()
+
+    Models that are dynamically populated are not as fully tested here.
+ */
+void ModelTest::rowCount()
+{
+//     qDebug() << "rc";
+    // check top row
+    QModelIndex topIndex = model->index ( 0, 0, QModelIndex() );
+    int rows = model->rowCount ( topIndex );
+    Q_ASSERT ( rows >= 0 );
+    if ( rows > 0 )
+        Q_ASSERT ( model->hasChildren ( topIndex ) == true );
+
+    QModelIndex secondLevelIndex = model->index ( 0, 0, topIndex );
+    if ( secondLevelIndex.isValid() ) { // not the top level
+        // check a row count where parent is valid
+        rows = model->rowCount ( secondLevelIndex );
+        Q_ASSERT ( rows >= 0 );
+        if ( rows > 0 )
+            Q_ASSERT ( model->hasChildren ( secondLevelIndex ) == true );
+    }
+
+    // The models rowCount() is tested more extensively in checkChildren(),
+    // but this catches the big mistakes
+}
+
+/*!
+    Tests model's implementation of QAbstractItemModel::columnCount() and hasChildren()
+ */
+void ModelTest::columnCount()
+{
+    // check top row
+    QModelIndex topIndex = model->index ( 0, 0, QModelIndex() );
+    Q_ASSERT ( model->columnCount ( topIndex ) >= 0 );
+
+    // check a column count where parent is valid
+    QModelIndex childIndex = model->index ( 0, 0, topIndex );
+    if ( childIndex.isValid() )
+        Q_ASSERT ( model->columnCount ( childIndex ) >= 0 );
+
+    // columnCount() is tested more extensively in checkChildren(),
+    // but this catches the big mistakes
+}
+
+/*!
+    Tests model's implementation of QAbstractItemModel::hasIndex()
+ */
+void ModelTest::hasIndex()
+{
+//     qDebug() << "hi";
+    // Make sure that invalid values returns an invalid index
+    Q_ASSERT ( model->hasIndex ( -2, -2 ) == false );
+    Q_ASSERT ( model->hasIndex ( -2, 0 ) == false );
+    Q_ASSERT ( model->hasIndex ( 0, -2 ) == false );
+
+    int rows = model->rowCount();
+    int columns = model->columnCount();
+
+    // check out of bounds
+    Q_ASSERT ( model->hasIndex ( rows, columns ) == false );
+    Q_ASSERT ( model->hasIndex ( rows + 1, columns + 1 ) == false );
+
+    if ( rows > 0 )
+        Q_ASSERT ( model->hasIndex ( 0, 0 ) == true );
+
+    // hasIndex() is tested more extensively in checkChildren(),
+    // but this catches the big mistakes
+}
+
+/*!
+    Tests model's implementation of QAbstractItemModel::index()
+ */
+void ModelTest::index()
+{
+//     qDebug() << "i";
+    // Make sure that invalid values returns an invalid index
+    Q_ASSERT ( model->index ( -2, -2 ) == QModelIndex() );
+    Q_ASSERT ( model->index ( -2, 0 ) == QModelIndex() );
+    Q_ASSERT ( model->index ( 0, -2 ) == QModelIndex() );
+
+    int rows = model->rowCount();
+    int columns = model->columnCount();
+
+    if ( rows == 0 )
+        return;
+
+    // Catch off by one errors
+    Q_ASSERT ( model->index ( rows, columns ) == QModelIndex() );
+    Q_ASSERT ( model->index ( 0, 0 ).isValid() == true );
+
+    // Make sure that the same index is *always* returned
+    QModelIndex a = model->index ( 0, 0 );
+    QModelIndex b = model->index ( 0, 0 );
+    Q_ASSERT ( a == b );
+
+    // index() is tested more extensively in checkChildren(),
+    // but this catches the big mistakes
+}
+
+/*!
+    Tests model's implementation of QAbstractItemModel::parent()
+ */
+void ModelTest::parent()
+{
+//     qDebug() << "p";
+    // Make sure the model wont crash and will return an invalid QModelIndex
+    // when asked for the parent of an invalid index.
+    Q_ASSERT ( model->parent ( QModelIndex() ) == QModelIndex() );
+
+    if ( model->rowCount() == 0 )
+        return;
+
+    // Column 0                | Column 1    |
+    // QModelIndex()           |             |
+    //    \- topIndex          | topIndex1   |
+    //         \- childIndex   | childIndex1 |
+
+    // Common error test #1, make sure that a top level index has a parent
+    // that is a invalid QModelIndex.
+    QModelIndex topIndex = model->index ( 0, 0, QModelIndex() );
+    Q_ASSERT ( model->parent ( topIndex ) == QModelIndex() );
+
+    // Common error test #2, make sure that a second level index has a parent
+    // that is the first level index.
+    if ( model->rowCount ( topIndex ) > 0 ) {
+        QModelIndex childIndex = model->index ( 0, 0, topIndex );
+        Q_ASSERT ( model->parent ( childIndex ) == topIndex );
+    }
+
+    // Common error test #3, the second column should NOT have the same children
+    // as the first column in a row.
+    // Usually the second column shouldn't have children.
+    QModelIndex topIndex1 = model->index ( 0, 1, QModelIndex() );
+    if ( model->rowCount ( topIndex1 ) > 0 ) {
+        QModelIndex childIndex = model->index ( 0, 0, topIndex );
+        QModelIndex childIndex1 = model->index ( 0, 0, topIndex1 );
+        Q_ASSERT ( childIndex != childIndex1 );
+    }
+
+    // Full test, walk n levels deep through the model making sure that all
+    // parent's children correctly specify their parent.
+    checkChildren ( QModelIndex() );
+}
+
+/*!
+    Called from the parent() test.
+
+    A model that returns an index of parent X should also return X when asking
+    for the parent of the index.
+
+    This recursive function does pretty extensive testing on the whole model in an
+    effort to catch edge cases.
+
+    This function assumes that rowCount(), columnCount() and index() already work.
+    If they have a bug it will point it out, but the above tests should have already
+    found the basic bugs because it is easier to figure out the problem in
+    those tests then this one.
+ */
+void ModelTest::checkChildren ( const QModelIndex &parent, int currentDepth )
+{
+    // First just try walking back up the tree.
+    QModelIndex p = parent;
+    while ( p.isValid() )
+        p = p.parent();
+
+    // For models that are dynamically populated
+    if ( model->canFetchMore ( parent ) ) {
+        fetchingMore = true;
+        model->fetchMore ( parent );
+        fetchingMore = false;
+    }
+
+    int rows = model->rowCount ( parent );
+    int columns = model->columnCount ( parent );
+
+    if ( rows > 0 )
+        Q_ASSERT ( model->hasChildren ( parent ) );
+
+    // Some further testing against rows(), columns(), and hasChildren()
+    Q_ASSERT ( rows >= 0 );
+    Q_ASSERT ( columns >= 0 );
+    if ( rows > 0 )
+        Q_ASSERT ( model->hasChildren ( parent ) == true );
+
+    //qDebug() << "parent:" << model->data(parent).toString() << "rows:" << rows
+    //         << "columns:" << columns << "parent column:" << parent.column();
+
+    Q_ASSERT ( model->hasIndex ( rows + 1, 0, parent ) == false );
+    for ( int r = 0; r < rows; ++r ) {
+        if ( model->canFetchMore ( parent ) ) {
+            fetchingMore = true;
+            model->fetchMore ( parent );
+            fetchingMore = false;
+        }
+        Q_ASSERT ( model->hasIndex ( r, columns + 1, parent ) == false );
+        for ( int c = 0; c < columns; ++c ) {
+            Q_ASSERT ( model->hasIndex ( r, c, parent ) == true );
+            QModelIndex index = model->index ( r, c, parent );
+            // rowCount() and columnCount() said that it existed...
+            Q_ASSERT ( index.isValid() == true );
+
+            // index() should always return the same index when called twice in a row
+            QModelIndex modifiedIndex = model->index ( r, c, parent );
+            Q_ASSERT ( index == modifiedIndex );
+
+            // Make sure we get the same index if we request it twice in a row
+            QModelIndex a = model->index ( r, c, parent );
+            QModelIndex b = model->index ( r, c, parent );
+            Q_ASSERT ( a == b );
+
+            // Some basic checking on the index that is returned
+            Q_ASSERT ( index.model() == model );
+            Q_ASSERT ( index.row() == r );
+            Q_ASSERT ( index.column() == c );
+            // While you can technically return a QVariant usually this is a sign
+            // of an bug in data()  Disable if this really is ok in your model.
+//            Q_ASSERT ( model->data ( index, Qt::DisplayRole ).isValid() == true );
+
+            // If the next test fails here is some somewhat useful debug you play with.
+
+            if (model->parent(index) != parent) {
+                qDebug() << r << c << currentDepth << model->data(index).toString()
+                         << model->data(parent).toString();
+                qDebug() << index << parent << model->parent(index);
+//                 And a view that you can even use to show the model.
+//                 QTreeView view;
+//                 view.setModel(model);
+//                 view.show();
+            }
+
+            // Check that we can get back our real parent.
+//             qDebug() << model->parent ( index ) << parent ;
+            Q_ASSERT ( model->parent ( index ) == parent );
+
+            // recursively go down the children
+            if ( model->hasChildren ( index ) && currentDepth < 10 ) {
+                //qDebug() << r << c << "has children" << model->rowCount(index);
+                checkChildren ( index, ++currentDepth );
+            }/* else { if (currentDepth >= 10) qDebug() << "checked 10 deep"; };*/
+
+            // make sure that after testing the children that the index doesn't change.
+            QModelIndex newerIndex = model->index ( r, c, parent );
+            Q_ASSERT ( index == newerIndex );
+        }
+    }
+}
+
+/*!
+    Tests model's implementation of QAbstractItemModel::data()
+ */
+void ModelTest::data()
+{
+    // Invalid index should return an invalid qvariant
+    Q_ASSERT ( !model->data ( QModelIndex() ).isValid() );
+
+    if ( model->rowCount() == 0 )
+        return;
+
+    // A valid index should have a valid QVariant data
+    Q_ASSERT ( model->index ( 0, 0 ).isValid() );
+
+    // shouldn't be able to set data on an invalid index
+    Q_ASSERT ( model->setData ( QModelIndex(), QLatin1String ( "foo" ), Qt::DisplayRole ) == false );
+
+    // General Purpose roles that should return a QString
+    QVariant variant = model->data ( model->index ( 0, 0 ), Qt::ToolTipRole );
+    if ( variant.isValid() ) {
+        Q_ASSERT ( qVariantCanConvert<QString> ( variant ) );
+    }
+    variant = model->data ( model->index ( 0, 0 ), Qt::StatusTipRole );
+    if ( variant.isValid() ) {
+        Q_ASSERT ( qVariantCanConvert<QString> ( variant ) );
+    }
+    variant = model->data ( model->index ( 0, 0 ), Qt::WhatsThisRole );
+    if ( variant.isValid() ) {
+        Q_ASSERT ( qVariantCanConvert<QString> ( variant ) );
+    }
+
+    // General Purpose roles that should return a QSize
+    variant = model->data ( model->index ( 0, 0 ), Qt::SizeHintRole );
+    if ( variant.isValid() ) {
+        Q_ASSERT ( qVariantCanConvert<QSize> ( variant ) );
+    }
+
+    // General Purpose roles that should return a QFont
+    QVariant fontVariant = model->data ( model->index ( 0, 0 ), Qt::FontRole );
+    if ( fontVariant.isValid() ) {
+        Q_ASSERT ( qVariantCanConvert<QFont> ( fontVariant ) );
+    }
+
+    // Check that the alignment is one we know about
+    QVariant textAlignmentVariant = model->data ( model->index ( 0, 0 ), Qt::TextAlignmentRole );
+    if ( textAlignmentVariant.isValid() ) {
+        int alignment = textAlignmentVariant.toInt();
+        Q_ASSERT ( alignment == ( alignment & ( Qt::AlignHorizontal_Mask | Qt::AlignVertical_Mask ) ) );
+    }
+
+    // General Purpose roles that should return a QColor
+    QVariant colorVariant = model->data ( model->index ( 0, 0 ), Qt::BackgroundColorRole );
+    if ( colorVariant.isValid() ) {
+        Q_ASSERT ( qVariantCanConvert<QColor> ( colorVariant ) );
+    }
+
+    colorVariant = model->data ( model->index ( 0, 0 ), Qt::TextColorRole );
+    if ( colorVariant.isValid() ) {
+        Q_ASSERT ( qVariantCanConvert<QColor> ( colorVariant ) );
+    }
+
+    // Check that the "check state" is one we know about.
+    QVariant checkStateVariant = model->data ( model->index ( 0, 0 ), Qt::CheckStateRole );
+    if ( checkStateVariant.isValid() ) {
+        int state = checkStateVariant.toInt();
+        Q_ASSERT ( state == Qt::Unchecked ||
+                   state == Qt::PartiallyChecked ||
+                   state == Qt::Checked );
+    }
+}
+
+/*!
+    Store what is about to be inserted to make sure it actually happens
+
+    \sa rowsInserted()
+ */
+void ModelTest::rowsAboutToBeInserted ( const QModelIndex &parent, int start, int end )
+{
+//     Q_UNUSED(end);
+    qDebug() << "rowsAboutToBeInserted" << "start=" << start << "end=" << end << "parent=" << model->data ( parent ).value<QString>()
+    << "current count of parent=" << model->rowCount ( parent ); // << "display of last=" << model->data( model->index(start-1, 0, parent) );
+//     qDebug() << model->index(start-1, 0, parent) << model->data( model->index(start-1, 0, parent) );
+    Changing c;
+    c.parent = parent;
+    c.oldSize = model->rowCount ( parent );
+    c.last = model->data ( model->index ( start - 1, 0, parent ) );
+    c.next = model->data ( model->index ( start, 0, parent ) );
+    insert.push ( c );
+}
+
+/*!
+    Confirm that what was said was going to happen actually did
+
+    \sa rowsAboutToBeInserted()
+ */
+void ModelTest::rowsInserted ( const QModelIndex & parent, int start, int end )
+{
+    Changing c = insert.pop();
+    Q_ASSERT ( c.parent == parent );
+    qDebug() << "rowsInserted"  << "start=" << start << "end=" << end << "oldsize=" << c.oldSize
+    << "parent=" << model->data ( parent ).value<QString>() << "current rowcount of parent=" << model->rowCount ( parent );
+
+    for (int ii=start; ii <= end; ii++)
+    {
+      qDebug() << "itemWasInserted:" << ii << model->data ( model->index ( ii, 0, parent ));
+    }
+    qDebug();
+
+    Q_ASSERT ( c.oldSize + ( end - start + 1 ) == model->rowCount ( parent ) );
+    Q_ASSERT ( c.last == model->data ( model->index ( start - 1, 0, c.parent ) ) );
+
+    if (c.next != model->data(model->index(end + 1, 0, c.parent))) {
+        qDebug() << start << end;
+        for (int i=0; i < model->rowCount(); ++i)
+            qDebug() << model->index(i, 0).data().toString();
+        qDebug() << c.next << model->data(model->index(end + 1, 0, c.parent));
+    }
+
+    Q_ASSERT ( c.next == model->data ( model->index ( end + 1, 0, c.parent ) ) );
+}
+
+void ModelTest::layoutAboutToBeChanged()
+{
+    for ( int i = 0; i < qBound ( 0, model->rowCount(), 100 ); ++i )
+        changing.append ( QPersistentModelIndex ( model->index ( i, 0 ) ) );
+}
+
+void ModelTest::layoutChanged()
+{
+    for ( int i = 0; i < changing.count(); ++i ) {
+        QPersistentModelIndex p = changing[i];
+        Q_ASSERT ( p == model->index ( p.row(), p.column(), p.parent() ) );
+    }
+    changing.clear();
+}
+
+/*!
+    Store what is about to be inserted to make sure it actually happens
+
+    \sa rowsRemoved()
+ */
+void ModelTest::rowsAboutToBeRemoved ( const QModelIndex &parent, int start, int end )
+{
+qDebug() << "ratbr" << parent << start << end;
+    Changing c;
+    c.parent = parent;
+    c.oldSize = model->rowCount ( parent );
+    c.last = model->data ( model->index ( start - 1, 0, parent ) );
+    c.next = model->data ( model->index ( end + 1, 0, parent ) );
+    remove.push ( c );
+}
+
+/*!
+    Confirm that what was said was going to happen actually did
+
+    \sa rowsAboutToBeRemoved()
+ */
+void ModelTest::rowsRemoved ( const QModelIndex & parent, int start, int end )
+{
+  qDebug() << "rr" << parent << start << end;
+    Changing c = remove.pop();
+    Q_ASSERT ( c.parent == parent );
+    Q_ASSERT ( c.oldSize - ( end - start + 1 ) == model->rowCount ( parent ) );
+    Q_ASSERT ( c.last == model->data ( model->index ( start - 1, 0, c.parent ) ) );
+    Q_ASSERT ( c.next == model->data ( model->index ( start, 0, c.parent ) ) );
+}
+
+