Long live Qt 4.5!

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diff --git a/tests/auto/qsqlquerymodel/tst_qsqlquerymodel.cpp b/tests/auto/qsqlquerymodel/tst_qsqlquerymodel.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 <QtTest/QtTest>
+#include <QtGui>
+
+#include <qsqldriver.h>
+#include <qsqldatabase.h>
+#include <qsqlerror.h>
+#include <qsqlfield.h>
+#include <qsqlquery.h>
+#include <qsqlrecord.h>
+
+#include <qsqlquerymodel.h>
+#include <qsortfilterproxymodel.h>
+
+#include "../qsqldatabase/tst_databases.h"
+
+//TESTED_CLASS=
+//TESTED_FILES=
+
+Q_DECLARE_METATYPE(Qt::Orientation)
+
+class tst_QSqlQueryModel : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QSqlQueryModel();
+    virtual ~tst_QSqlQueryModel();
+
+public slots:
+    void initTestCase();
+    void cleanupTestCase();
+    void init();
+    void cleanup();
+
+private slots:
+    void insertColumn_data() { generic_data(); }
+    void insertColumn();
+    void removeColumn_data() { generic_data(); }
+    void removeColumn();
+    void record_data() { generic_data(); }
+    void record();
+    void setHeaderData_data() { generic_data(); }
+    void setHeaderData();
+    void fetchMore_data() { generic_data(); }
+    void fetchMore();
+
+    //problem specific tests
+    void withSortFilterProxyModel_data() { generic_data(); }
+    void withSortFilterProxyModel();
+    void setQuerySignalEmission_data() { generic_data(); }
+    void setQuerySignalEmission();
+    void setQueryWithNoRowsInResultSet_data() { generic_data(); }
+    void setQueryWithNoRowsInResultSet();
+
+private:
+    void generic_data();
+    void dropTestTables(QSqlDatabase db);
+    void createTestTables(QSqlDatabase db);
+    void populateTestTables(QSqlDatabase db);
+    tst_Databases dbs;
+};
+
+/* Stupid class that makes protected members public for testing */
+class DBTestModel: public QSqlQueryModel
+{
+public:
+    DBTestModel(QObject *parent = 0): QSqlQueryModel(parent) {}
+    QModelIndex indexInQuery(const QModelIndex &item) const { return QSqlQueryModel::indexInQuery(item); }
+};
+
+tst_QSqlQueryModel::tst_QSqlQueryModel()
+{
+}
+
+tst_QSqlQueryModel::~tst_QSqlQueryModel()
+{
+}
+
+void tst_QSqlQueryModel::initTestCase()
+{
+    qRegisterMetaType<QModelIndex>("QModelIndex");
+    dbs.open();
+    for (QStringList::ConstIterator it = dbs.dbNames.begin(); it != dbs.dbNames.end(); ++it) {
+	QSqlDatabase db = QSqlDatabase::database((*it));
+	CHECK_DATABASE(db);
+	dropTestTables(db); //in case of leftovers
+	createTestTables(db);
+	populateTestTables(db);
+    }
+}
+
+void tst_QSqlQueryModel::cleanupTestCase()
+{
+    for (QStringList::ConstIterator it = dbs.dbNames.begin(); it != dbs.dbNames.end(); ++it) {
+	QSqlDatabase db = QSqlDatabase::database((*it));
+	CHECK_DATABASE(db);
+	dropTestTables(db);
+    }
+    dbs.close();
+}
+
+void tst_QSqlQueryModel::dropTestTables(QSqlDatabase db)
+{
+    QStringList tableNames;
+    tableNames << qTableName("test")
+            << qTableName("test2")
+            << qTableName("test3")
+            << qTableName("many");
+    tst_Databases::safeDropTables(db, tableNames);
+}
+
+void tst_QSqlQueryModel::createTestTables(QSqlDatabase db)
+{
+    dropTestTables(db);
+    QSqlQuery q(db);
+    QVERIFY_SQL( q, exec("create table " + qTableName("test") + "(id integer not null, name varchar(20), title integer, primary key (id))"));
+    QVERIFY_SQL( q, exec("create table " + qTableName("test2") + "(id integer not null, title varchar(20), primary key (id))"));
+    QVERIFY_SQL( q, exec("create table " + qTableName("test3") + "(id integer not null, primary key (id))"));
+    QVERIFY_SQL( q, exec("create table " + qTableName("many") + "(id integer not null, name varchar(20), primary key (id))"));
+}
+
+void tst_QSqlQueryModel::populateTestTables(QSqlDatabase db)
+{
+    qWarning() << "Populating test tables, this can take quite a while... ZZZzzz...";
+    bool hasTransactions = db.driver()->hasFeature(QSqlDriver::Transactions);
+
+    QSqlQuery q(db), q2(db);
+
+    tst_Databases::safeDropTables(db, QStringList() << qTableName("manytmp") << qTableName("test3tmp"));
+    QVERIFY_SQL(q, exec("create table " + qTableName("manytmp") + "(id integer not null, name varchar(20), primary key (id))"));
+    QVERIFY_SQL(q, exec("create table " + qTableName("test3tmp") + "(id integer not null, primary key (id))"));
+
+    if (hasTransactions) QVERIFY_SQL(db, transaction());
+
+    QVERIFY_SQL(q, exec("insert into " + qTableName("test") + " values(1, 'harry', 1)"));
+    QVERIFY_SQL(q, exec("insert into " + qTableName("test") + " values(2, 'trond', 2)"));
+    QVERIFY_SQL(q, exec("insert into " + qTableName("test2") + " values(1, 'herr')"));
+    QVERIFY_SQL(q, exec("insert into " + qTableName("test2") + " values(2, 'mister')"));
+
+    QVERIFY_SQL(q, exec(QString("insert into " + qTableName("test3") + " values(0)")));
+    QVERIFY_SQL(q, prepare("insert into "+qTableName("test3")+"(id) select id + ? from "+qTableName("test3tmp")));
+    for (int i=1; i<260; i*=2) {
+        q2.exec("delete from "+qTableName("test3tmp"));
+        QVERIFY_SQL(q2, exec("insert into "+qTableName("test3tmp")+"(id) select id from "+qTableName("test3")));
+        q.bindValue(0, i);
+        QVERIFY_SQL(q, exec());
+    }
+
+    QVERIFY_SQL(q, exec(QString("insert into " + qTableName("many") + "(id, name) values (0, \'harry\')")));
+    QVERIFY_SQL(q, prepare("insert into "+qTableName("many")+"(id, name) select id + ?, name from "+qTableName("manytmp")));
+    for (int i=1; i < 2048; i*=2) {
+        q2.exec("delete from "+qTableName("manytmp"));
+        QVERIFY_SQL(q2, exec("insert into "+qTableName("manytmp")+"(id, name) select id, name from "+qTableName("many")));
+        q.bindValue(0, i);
+        QVERIFY_SQL(q, exec());
+    }
+
+    if (hasTransactions) QVERIFY_SQL(db, commit());
+
+    tst_Databases::safeDropTables(db, QStringList() << qTableName("manytmp") << qTableName("test3tmp"));
+}
+
+void tst_QSqlQueryModel::generic_data()
+{
+    if (dbs.fillTestTable() == 0)
+	QSKIP("No database drivers are available in this Qt configuration", SkipAll);
+}
+
+void tst_QSqlQueryModel::init()
+{
+}
+
+void tst_QSqlQueryModel::cleanup()
+{
+}
+
+void tst_QSqlQueryModel::removeColumn()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    DBTestModel model;
+    model.setQuery(QSqlQuery("select * from " + qTableName("test"), db));
+    model.fetchMore();
+    QSignalSpy spy(&model, SIGNAL(columnsAboutToBeRemoved(QModelIndex, int, int)));
+
+    QCOMPARE(model.columnCount(), 3);
+    QVERIFY(model.removeColumn(0));
+    QCOMPARE(spy.count(), 1);
+    QVERIFY(*(QModelIndex *)spy.at(0).at(0).constData() == QModelIndex());
+    QCOMPARE(spy.at(0).at(1).toInt(), 0);
+    QCOMPARE(spy.at(0).at(2).toInt(), 0);
+
+    QCOMPARE(model.columnCount(), 2);
+    QCOMPARE(model.indexInQuery(model.index(0, 0)).column(), 1);
+    QCOMPARE(model.indexInQuery(model.index(0, 1)).column(), 2);
+    QCOMPARE(model.indexInQuery(model.index(0, 2)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 3)).column(), -1);
+
+    QVERIFY(model.insertColumn(1));
+    QCOMPARE(model.columnCount(), 3);
+    QCOMPARE(model.indexInQuery(model.index(0, 0)).column(), 1);
+    QCOMPARE(model.indexInQuery(model.index(0, 1)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 2)).column(), 2);
+    QCOMPARE(model.indexInQuery(model.index(0, 3)).column(), -1);
+
+    QCOMPARE(model.data(model.index(0, 0)).toString(), QString("harry"));
+    QCOMPARE(model.data(model.index(0, 1)), QVariant());
+    QCOMPARE(model.data(model.index(0, 2)).toInt(), 1);
+    QCOMPARE(model.data(model.index(0, 3)), QVariant());
+
+    QVERIFY(!model.removeColumn(42));
+    QVERIFY(!model.removeColumn(3));
+    QVERIFY(!model.removeColumn(1, model.index(1, 2)));
+    QCOMPARE(model.columnCount(), 3);
+
+    QVERIFY(model.removeColumn(2));
+
+    QCOMPARE(spy.count(), 2);
+    QVERIFY(*(QModelIndex *)spy.at(1).at(0).constData() == QModelIndex());
+    QCOMPARE(spy.at(1).at(1).toInt(), 2);
+    QCOMPARE(spy.at(1).at(2).toInt(), 2);
+
+    QCOMPARE(model.columnCount(), 2);
+    QCOMPARE(model.indexInQuery(model.index(0, 0)).column(), 1);
+    QCOMPARE(model.indexInQuery(model.index(0, 1)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 2)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 3)).column(), -1);
+
+    QVERIFY(model.removeColumn(1));
+
+    QCOMPARE(spy.count(), 3);
+    QVERIFY(*(QModelIndex *)spy.at(2).at(0).constData() == QModelIndex());
+    QCOMPARE(spy.at(2).at(1).toInt(), 1);
+    QCOMPARE(spy.at(2).at(2).toInt(), 1);
+
+    QCOMPARE(model.columnCount(), 1);
+    QCOMPARE(model.indexInQuery(model.index(0, 0)).column(), 1);
+    QCOMPARE(model.indexInQuery(model.index(0, 1)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 2)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 3)).column(), -1);
+    QCOMPARE(model.data(model.index(0, 0)).toString(), QString("harry"));
+
+    QVERIFY(model.removeColumn(0));
+
+    QCOMPARE(spy.count(), 4);
+    QVERIFY(*(QModelIndex *)spy.at(3).at(0).constData() == QModelIndex());
+    QCOMPARE(spy.at(3).at(1).toInt(), 0);
+    QCOMPARE(spy.at(3).at(2).toInt(), 0);
+
+    QCOMPARE(model.columnCount(), 0);
+    QCOMPARE(model.indexInQuery(model.index(0, 0)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 1)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 2)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 3)).column(), -1);
+}
+
+void tst_QSqlQueryModel::insertColumn()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    DBTestModel model;
+    model.setQuery(QSqlQuery("select * from " + qTableName("test"), db));
+    model.fetchMore(); // necessary???
+
+    QSignalSpy spy(&model, SIGNAL(columnsInserted(QModelIndex, int, int)));
+
+    QCOMPARE(model.data(model.index(0, 0)).toInt(), 1);
+    QCOMPARE(model.data(model.index(0, 1)).toString(), QString("harry"));
+    QCOMPARE(model.data(model.index(0, 2)).toInt(), 1);
+    QCOMPARE(model.data(model.index(0, 3)), QVariant());
+
+    QVERIFY(model.insertColumn(1));
+
+    QCOMPARE(spy.count(), 1);
+    QVERIFY(*(QModelIndex *)spy.at(0).at(0).constData() == QModelIndex());
+    QCOMPARE(spy.at(0).at(1).toInt(), 1);
+    QCOMPARE(spy.at(0).at(2).toInt(), 1);
+
+    QCOMPARE(model.indexInQuery(model.index(0, 0)).column(), 0);
+    QCOMPARE(model.indexInQuery(model.index(0, 1)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 2)).column(), 1);
+    QCOMPARE(model.indexInQuery(model.index(0, 3)).column(), 2);
+    QCOMPARE(model.indexInQuery(model.index(0, 4)).column(), -1);
+
+    QCOMPARE(model.data(model.index(0, 0)).toInt(), 1);
+    QCOMPARE(model.data(model.index(0, 1)), QVariant());
+    QCOMPARE(model.data(model.index(0, 2)).toString(), QString("harry"));
+    QCOMPARE(model.data(model.index(0, 3)).toInt(), 1);
+    QCOMPARE(model.data(model.index(0, 4)), QVariant());
+
+    QVERIFY(!model.insertColumn(-1));
+    QVERIFY(!model.insertColumn(100));
+    QVERIFY(!model.insertColumn(1, model.index(1, 1)));
+
+    QVERIFY(model.insertColumn(0));
+
+    QCOMPARE(spy.count(), 2);
+    QVERIFY(*(QModelIndex *)spy.at(1).at(0).constData() == QModelIndex());
+    QCOMPARE(spy.at(1).at(1).toInt(), 0);
+    QCOMPARE(spy.at(1).at(2).toInt(), 0);
+
+    QCOMPARE(model.indexInQuery(model.index(0, 0)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 1)).column(), 0);
+    QCOMPARE(model.indexInQuery(model.index(0, 2)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 3)).column(), 1);
+    QCOMPARE(model.indexInQuery(model.index(0, 4)).column(), 2);
+    QCOMPARE(model.indexInQuery(model.index(0, 5)).column(), -1);
+
+    QVERIFY(!model.insertColumn(6));
+    QVERIFY(model.insertColumn(5));
+
+    QCOMPARE(spy.count(), 3);
+    QVERIFY(*(QModelIndex *)spy.at(2).at(0).constData() == QModelIndex());
+    QCOMPARE(spy.at(2).at(1).toInt(), 5);
+    QCOMPARE(spy.at(2).at(2).toInt(), 5);
+
+    QCOMPARE(model.indexInQuery(model.index(0, 0)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 1)).column(), 0);
+    QCOMPARE(model.indexInQuery(model.index(0, 2)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 3)).column(), 1);
+    QCOMPARE(model.indexInQuery(model.index(0, 4)).column(), 2);
+    QCOMPARE(model.indexInQuery(model.index(0, 5)).column(), -1);
+    QCOMPARE(model.indexInQuery(model.index(0, 6)).column(), -1);
+
+    bool isToUpper = db.driverName().startsWith("QIBASE") || db.driverName().startsWith("QOCI") || db.driverName().startsWith("QDB2");
+    QCOMPARE(model.record().field(0).name(), QString());
+    QCOMPARE(model.record().field(1).name(), isToUpper ? QString("ID") : QString("id"));
+    QCOMPARE(model.record().field(2).name(), QString());
+    QCOMPARE(model.record().field(3).name(), isToUpper ? QString("NAME") : QString("name"));
+    QCOMPARE(model.record().field(4).name(), isToUpper ? QString("TITLE") : QString("title"));
+    QCOMPARE(model.record().field(5).name(), QString());
+    QCOMPARE(model.record().field(6).name(), QString());
+}
+
+void tst_QSqlQueryModel::record()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    QSqlQueryModel model;
+    model.setQuery(QSqlQuery("select * from " + qTableName("test"), db));
+
+    QSqlRecord rec = model.record();
+
+    bool isToUpper = db.driverName().startsWith("QIBASE") || db.driverName().startsWith("QOCI") || db.driverName().startsWith("QDB2");
+
+    QCOMPARE(rec.count(), 3);
+    QCOMPARE(rec.fieldName(0), isToUpper ? QString("ID") : QString("id"));
+    QCOMPARE(rec.fieldName(1), isToUpper ? QString("NAME") : QString("name"));
+    QCOMPARE(rec.fieldName(2), isToUpper ? QString("TITLE") : QString("title"));
+    QCOMPARE(rec.value(0), QVariant());
+    QCOMPARE(rec.value(1), QVariant());
+    QCOMPARE(rec.value(2), QVariant());
+
+    rec = model.record(0);
+    QCOMPARE(rec.fieldName(0), isToUpper ? QString("ID") : QString("id"));
+    QCOMPARE(rec.fieldName(1), isToUpper ? QString("NAME") : QString("name"));
+    QCOMPARE(rec.fieldName(2), isToUpper ? QString("TITLE") : QString("title"));
+    QCOMPARE(rec.value(0).toString(), QString("1"));
+    QCOMPARE(rec.value(1), QVariant("harry"));
+    QCOMPARE(rec.value(2), QVariant(1));
+}
+
+void tst_QSqlQueryModel::setHeaderData()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    QSqlQueryModel model;
+
+    QVERIFY(!model.setHeaderData(5, Qt::Vertical, "foo"));
+    QVERIFY(model.headerData(5, Qt::Vertical).isValid());
+
+    qRegisterMetaType<Qt::Orientation>("Qt::Orientation");
+    QSignalSpy spy(&model, SIGNAL(headerDataChanged(Qt::Orientation, int, int)));
+    QVERIFY(model.setHeaderData(2, Qt::Horizontal, "bar"));
+    QCOMPARE(model.headerData(2, Qt::Horizontal).toString(), QString("bar"));
+    QCOMPARE(spy.count(), 1);
+    QCOMPARE(qvariant_cast<Qt::Orientation>(spy.value(0).value(0)), Qt::Horizontal);
+    QCOMPARE(spy.value(0).value(1).toInt(), 2);
+    QCOMPARE(spy.value(0).value(2).toInt(), 2);
+
+    QVERIFY(model.setHeaderData(7, Qt::Horizontal, "foo", Qt::ToolTipRole));
+    QVERIFY(model.headerData(7, Qt::Horizontal, Qt::ToolTipRole).isValid());
+
+    model.setQuery(QSqlQuery("select * from " + qTableName("test"), db));
+
+    bool isToUpper = db.driverName().startsWith("QIBASE") || db.driverName().startsWith("QOCI") || db.driverName().startsWith("QDB2");
+    QCOMPARE(model.headerData(0, Qt::Horizontal).toString(), isToUpper ? QString("ID") : QString("id"));
+    QCOMPARE(model.headerData(1, Qt::Horizontal).toString(), isToUpper ? QString("NAME") : QString("name"));
+    QCOMPARE(model.headerData(2, Qt::Horizontal).toString(), QString("bar"));
+    QVERIFY(model.headerData(3, Qt::Horizontal).isValid());
+}
+
+void tst_QSqlQueryModel::fetchMore()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    QSqlQueryModel model;
+    QSignalSpy spy(&model, SIGNAL(rowsInserted(QModelIndex, int, int)));
+
+    model.setQuery(QSqlQuery("select * from " + qTableName("many"), db));
+    int rowCount = model.rowCount();
+
+    QCOMPARE(spy.value(0).value(1).toInt(), 0);
+    QCOMPARE(spy.value(0).value(2).toInt(), rowCount - 1);
+
+    // If the driver doesn't return the query size fetchMore() causes the
+    // model to grow and new signals are emitted
+    if (!db.driver()->hasFeature(QSqlDriver::QuerySize)) {
+        spy.clear();
+        model.fetchMore();
+        int newRowCount = model.rowCount();
+        QCOMPARE(spy.value(0).value(1).toInt(), rowCount);
+        QCOMPARE(spy.value(0).value(2).toInt(), newRowCount - 1);
+    }
+}
+
+// For task 149491: When used with QSortFilterProxyModel, a view and a
+// database that doesn't support the QuerySize feature, blank rows was
+// appended if the query returned more than 256 rows and setQuery()
+// was called more than once. This because an insertion of rows was
+// triggered at the same time as the model was being cleared.
+void tst_QSqlQueryModel::withSortFilterProxyModel()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    if (db.driver()->hasFeature(QSqlDriver::QuerySize))
+        QSKIP("Test applies only for drivers not reporting the query size.", SkipSingle);
+
+    QSqlQueryModel model;
+    model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test3"), db));
+    QSortFilterProxyModel proxy;
+    proxy.setSourceModel(&model);
+
+    QTableView view;
+    view.setModel(&proxy);
+
+    QSignalSpy modelRowsRemovedSpy(&model, SIGNAL(rowsRemoved(const QModelIndex &, int, int)));
+    QSignalSpy modelRowsInsertedSpy(&model, SIGNAL(rowsInserted(const QModelIndex &, int, int)));
+    model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test3"), db));
+    view.scrollToBottom();
+    
+    QTestEventLoop::instance().enterLoop(1);
+
+    QCOMPARE(proxy.rowCount(), 511);
+
+    // The second call to setQuery() clears the model by removing it's rows.
+    // Only 256 rows because that is what was cached.
+    QCOMPARE(modelRowsRemovedSpy.count(), 1);
+    QCOMPARE(modelRowsRemovedSpy.value(0).value(1).toInt(), 0);
+    QCOMPARE(modelRowsRemovedSpy.value(0).value(2).toInt(), 255);
+
+    // The call to scrollToBottom() forces the model to fetch all rows,
+    // which will be done in two steps.
+    QCOMPARE(modelRowsInsertedSpy.count(), 2);
+    QCOMPARE(modelRowsInsertedSpy.value(0).value(1).toInt(), 0);
+    QCOMPARE(modelRowsInsertedSpy.value(0).value(2).toInt(), 255);
+    QCOMPARE(modelRowsInsertedSpy.value(1).value(1).toInt(), 256);
+    QCOMPARE(modelRowsInsertedSpy.value(1).value(2).toInt(), 510);
+}
+
+// For task 155402: When the model is already empty when setQuery() is called
+// no rows have to be removed and rowsAboutToBeRemoved and rowsRemoved should
+// not be emitted.
+void tst_QSqlQueryModel::setQuerySignalEmission()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    QSqlQueryModel model;
+    QSignalSpy modelRowsAboutToBeRemovedSpy(&model, SIGNAL(rowsAboutToBeRemoved(const QModelIndex &, int, int)));
+    QSignalSpy modelRowsRemovedSpy(&model, SIGNAL(rowsRemoved(const QModelIndex &, int, int)));
+
+    // First select, the model was empty and no rows had to be removed!
+    model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test"), db)); 
+    QCOMPARE(modelRowsAboutToBeRemovedSpy.count(), 0);
+    QCOMPARE(modelRowsRemovedSpy.count(), 0);
+
+    // Second select, the model wasn't empty and two rows had to be removed!
+    model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test"), db)); 
+    QCOMPARE(modelRowsAboutToBeRemovedSpy.count(), 1);
+    QCOMPARE(modelRowsAboutToBeRemovedSpy.value(0).value(1).toInt(), 0);
+    QCOMPARE(modelRowsAboutToBeRemovedSpy.value(0).value(2).toInt(), 1);
+    QCOMPARE(modelRowsRemovedSpy.count(), 1);
+    QCOMPARE(modelRowsRemovedSpy.value(0).value(1).toInt(), 0);
+    QCOMPARE(modelRowsRemovedSpy.value(0).value(2).toInt(), 1);
+}
+
+// For task 170783: When the query's result set is empty no rows should be inserted,
+// i.e. no rowsAboutToBeInserted or rowsInserted signals should be emitted.
+void tst_QSqlQueryModel::setQueryWithNoRowsInResultSet()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    QSqlQueryModel model;
+    QSignalSpy modelRowsAboutToBeInsertedSpy(&model, SIGNAL(rowsAboutToBeInserted(const QModelIndex &, int, int)));
+    QSignalSpy modelRowsInsertedSpy(&model, SIGNAL(rowsInserted(const QModelIndex &, int, int)));
+
+    // The query's result set will be empty so no signals should be emitted!
+    QSqlQuery query(db);
+    QVERIFY_SQL(query, exec("SELECT * FROM " + qTableName("test") + " where 0 = 1"));
+    model.setQuery(query); 
+    QCOMPARE(modelRowsAboutToBeInsertedSpy.count(), 0);
+    QCOMPARE(modelRowsInsertedSpy.count(), 0);
+}
+
+QTEST_MAIN(tst_QSqlQueryModel)
+#include "tst_qsqlquerymodel.moc"