Standardise layout and naming in corelib benchmarks

Make file names match CMake's test names (and those follow dir-name)
and class names follow tst_ClassName pattern when testing
ClassName. Purge comments about the qmake configs the CMakeLists.txt
are generated from.  Purge empty constructors and init/cleanup methods
of classes.  Fix petty coding style violations.

Add qdir/tree/, qurl, qbench and qset benchmarks to their parent directories'
lists of subdirs. Fix unused return error from qurl benchmark.

Change-Id: Ifc15a3a46e71cf82ad0637753517e0df34049763
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 226 insertions, 0 deletions

diff --git a/tests/benchmarks/corelib/io/qdir/tree/tst_bench_qdir_tree.cpp b/tests/benchmarks/corelib/io/qdir/tree/tst_bench_qdir_tree.cpp
new file mode 100644
index 0000000000..d960cb41e2
--- /dev/null
+++ b/tests/benchmarks/corelib/io/qdir/tree/tst_bench_qdir_tree.cpp
@@ -0,0 +1,226 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QTest>
+
+#include <QDirIterator>
+#include <QFile>
+#include <QString>
+#include <QStack>
+
+#include "../../../../../shared/filesystem.h"
+
+class tst_QDir_tree
+    : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QDir_tree()
+        : prefix("test-tree/"),
+          musicprefix(QLatin1String("music")),
+          photoprefix(QLatin1String("photos")),
+          sourceprefix(QLatin1String("source")),
+          musicsize(0),
+          photosize(0),
+          sourcesize(0)
+    {
+    }
+
+private:
+    QByteArray prefix;
+    QString musicprefix;
+    QString photoprefix;
+    QString sourceprefix;
+    qint64 musicsize;
+    qint64 photosize;
+    qint64 sourcesize;
+    FileSystem fs; // Uses QTemporaryDir to tidy away file tree created.
+
+private slots:
+    void initTestCase()
+    {
+        QFile list(":/4.6.0-list.txt");
+        QVERIFY(list.open(QIODevice::ReadOnly | QIODevice::Text));
+
+        QVERIFY(fs.createDirectory(prefix));
+
+        QStack<QByteArray> stack;
+        QByteArray line;
+        while (true) {
+            char ch;
+            if (!list.getChar(&ch))
+                break;
+            if (ch != ' ') {
+                line.append(ch);
+                continue;
+            }
+
+            int pop = 1;
+            if (!line.isEmpty())
+                pop = line.toInt();
+
+            while (pop) {
+                stack.pop();
+                --pop;
+            }
+
+            line = list.readLine().trimmed();
+            stack.push(line);
+
+            line = prefix;
+            for (const QByteArray &pathElement : qAsConst(stack))
+                line += pathElement;
+
+            if (line.endsWith('/'))
+                QVERIFY(fs.createDirectory(line));
+            else
+                QVERIFY(fs.createFile(line));
+
+            line.clear();
+        }
+
+        //Use case: music collection - 10 files in 100 directories (albums)
+        QVERIFY(fs.createDirectory(musicprefix));
+        for (int i=0;i<1000;i++) {
+            if ((i % 10) == 0)
+                QVERIFY(fs.createDirectory(QString("%1/directory%2").arg(musicprefix).arg(i/10)));
+            qint64 size = fs.createFileWithContent(QString("%1/directory%2/file%3").arg(musicprefix).arg(i/10).arg(i));
+            QVERIFY(size > 0);
+            musicsize += size;
+        }
+        //Use case: photos - 1000 files in 1 directory
+        QVERIFY(fs.createDirectory(photoprefix));
+        for (int i=0;i<1000;i++) {
+            qint64 size = fs.createFileWithContent(QString("%1/file%2").arg(photoprefix).arg(i));
+            QVERIFY(size > 0);
+            photosize += size;
+        }
+        //Use case: source - 10 files in 10 subdirectories in 10 directories (1000 total)
+        QVERIFY(fs.createDirectory(sourceprefix));
+        for (int i=0;i<1000;i++) {
+            if ((i % 100) == 0)
+                QVERIFY(fs.createDirectory(QString("%1/directory%2").arg(sourceprefix).arg(i/100)));
+            if ((i % 10) == 0)
+                QVERIFY(fs.createDirectory(QString("%1/directory%2/subdirectory%3").arg(sourceprefix).arg(i/100).arg(i/10)));
+            qint64 size = fs.createFileWithContent(QString("%1/directory%2/subdirectory%3/file%4").arg(sourceprefix).arg(i/100).arg(i/10).arg(i));
+            QVERIFY(size > 0);
+            sourcesize += size;
+        }
+    }
+
+    void fileSearch_data() const
+    {
+        QTest::addColumn<QStringList>("nameFilters");
+        QTest::addColumn<int>("filter");
+        QTest::addColumn<int>("entryCount");
+
+        QTest::newRow("*.cpp") << QStringList("*.cpp") << int(QDir::Files) << 3791;
+        QTest::newRow("executables")
+            << QStringList("*")
+            << int(QDir::Executable | QDir::Files | QDir::AllDirs | QDir::NoDotAndDotDot)
+            << 536;
+    }
+
+    void fileSearch() const
+    {
+        QFETCH(QStringList, nameFilters);
+        QFETCH(int, filter);
+        QFETCH(int, entryCount);
+
+        int count = 0;
+        QBENCHMARK {
+            // Recursive directory iteration
+            QDirIterator iterator(fs.absoluteFilePath(prefix),
+                                  nameFilters, QDir::Filter(filter),
+                                  QDirIterator::Subdirectories | QDirIterator::FollowSymlinks);
+
+            count = 0;
+            while (iterator.hasNext()) {
+                iterator.next();
+                ++count;
+            }
+
+            QCOMPARE(count, entryCount);
+        }
+
+        QCOMPARE(count, entryCount);
+    }
+
+    void traverseDirectory() const
+    {
+        int count = 0;
+        QBENCHMARK {
+            QDirIterator iterator(
+                    fs.absoluteFilePath(prefix),
+                    QDir::AllEntries | QDir::NoDotAndDotDot | QDir::Hidden | QDir::System,
+                    QDirIterator::Subdirectories | QDirIterator::FollowSymlinks);
+
+            count = 0;
+            while (iterator.hasNext()) {
+                iterator.next();
+                ++count;
+            }
+
+            QCOMPARE(count, 11906);
+        }
+
+        QCOMPARE(count, 11906);
+    }
+
+    void thousandFiles_data() const
+    {
+        QTest::addColumn<QString>("dirName");
+        QTest::addColumn<qint64>("expectedSize");
+        QTest::newRow("music") << musicprefix << musicsize;
+        QTest::newRow("photos") << photoprefix << photosize;
+        QTest::newRow("src") << sourceprefix << sourcesize;
+    }
+
+    void thousandFiles() const
+    {
+        QFETCH(QString, dirName);
+        QFETCH(qint64, expectedSize);
+        QBENCHMARK {
+            qint64 totalsize = 0;
+            int count = 0;
+            QDirIterator iter(fs.absoluteFilePath(dirName),
+                              QDir::Files, QDirIterator::Subdirectories);
+            while(iter.hasNext()) {
+                count++;
+                totalsize += iter.nextFileInfo().size();
+            }
+            QCOMPARE(count, 1000);
+            QCOMPARE(totalsize, expectedSize);
+        }
+    }
+};
+
+QTEST_MAIN(tst_QDir_tree)
+
+#include "tst_bench_qdir_tree.moc"