add QIcon benchmark

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>

tests/benchmarks/gui/image/qicon/CMakeLists.txt

@@ -0,0 +1,3 @@
+katie_gui_test(tst_bench_qicon
+    ${CMAKE_CURRENT_SOURCE_DIR}/tst_qicon.cpp
+)

tests/benchmarks/gui/image/qicon/tst_qicon.cpp

@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** Copyright (C) 2023 Ivailo Monev
+**
+** This file is part of the test suite of the Katie Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+**
+** GNU Lesser General Public License Usage
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qtest.h>
+#include <QDebug>
+#include <QFile>
+#include <QIcon>
+#include <QPixmap>
+#include <QImageReader>
+
+//TESTED_FILES=
+
+class tst_QIcon : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QIcon();
+    virtual ~tst_QIcon();
+
+private slots:
+    void iconPixmap_data();
+    void iconPixmap();
+
+    void iconFromTheme_data();
+    void iconFromTheme();
+
+private:
+    QList< QPair<QString, QByteArray> > images; // filename, format
+};
+
+tst_QIcon::tst_QIcon()
+{
+    foreach (const QByteArray &format, QImageReader::supportedImageFormats()) {
+        const QString benchfilepath = QLatin1String(SRCDIR "/images/bench.") + format;
+
+        if (QFile::exists(benchfilepath)) {
+            images << QPair<QString, QByteArray>(benchfilepath, format);
+        }
+    }
+}
+
+tst_QIcon::~tst_QIcon()
+{
+}
+
+void tst_QIcon::iconPixmap_data()
+{
+    QTest::addColumn<QString>("fileName");
+    QTest::addColumn<QByteArray>("format");
+
+    for (int i = 0; i < images.size(); ++i) {
+        const QString file = images[i].first;
+        const QByteArray format = images[i].second;
+        QTest::newRow(qPrintable(file)) << file << format;
+    }
+}
+
+void tst_QIcon::iconPixmap()
+{
+    QFETCH(QString, fileName);
+    QFETCH(QByteArray, format);
+
+    const QSize iconSize = QSize(32, 32);
+    QBENCHMARK {
+        QIcon icon(fileName);
+        QPixmap pixmap = icon.pixmap(iconSize);
+        QVERIFY(!pixmap.isNull());
+    }
+}
+
+void tst_QIcon::iconFromTheme_data()
+{
+    QTest::addColumn<QString>("fileName");
+
+    QTest::newRow("folder") << QString::fromLatin1("folder");
+    QTest::newRow("dialog-close") << QString::fromLatin1("dialog-close");
+    QTest::newRow("user-home") << QString::fromLatin1("user-home");
+}
+
+void tst_QIcon::iconFromTheme()
+{
+    QFETCH(QString, fileName);
+
+    const QSize iconSize = QSize(32, 32);
+    QBENCHMARK {
+        QIcon icon = QIcon::fromTheme(fileName);
+        QPixmap pixmap = icon.pixmap(iconSize);
+        QVERIFY(!pixmap.isNull());
+    }
+}
+
+QTEST_MAIN(tst_QIcon)
+
+#include "moc_tst_qicon.cpp"