/*
 * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: CC0-1.0
 * 
 * This software is in the public domain, furnished "as is", without technical
 * support, and with no warranty, express or implied, as to its usefulness for
 * any purpose.
 */

#include "syncenginetestutils.h"

#include "common/vfs.h"
#include "openfilemanager.h"
#include "syncengine.h"
#include "vfs/cfapi/cfapiwrapper.h"

#include <QtTest>

using namespace Qt::StringLiterals;

namespace cfapi {
using namespace OCC::CfApiWrapper;
}

#define CFVERIFY_VIRTUAL(folder, path) \
    QVERIFY(QFileInfo((folder).localPath() + (path)).exists()); \
    QVERIFY(cfapi::isSparseFile((folder).localPath() + (path))); \
    QVERIFY(dbRecord((folder), (path)).isValid()); \
    QCOMPARE(dbRecord((folder), (path))._type, ItemTypeVirtualFile);

#define CFVERIFY_NONVIRTUAL(folder, path) \
    QVERIFY(QFileInfo((folder).localPath() + (path)).exists()); \
    QVERIFY(!cfapi::isSparseFile((folder).localPath() + (path))); \
    QVERIFY(dbRecord((folder), (path)).isValid()); \
    QCOMPARE(dbRecord((folder), (path))._type, ItemTypeFile);

#define CFVERIFY_GONE(folder, path) \
    QVERIFY(!QFileInfo((folder).localPath() + (path)).exists()); \
    QVERIFY(!dbRecord((folder), (path)).isValid());

using namespace OCC;

enum ErrorKind : int {
    NoError = 0,
    // Lower code are corresponding to HTTP error code
    Timeout = 1000,
};

void setPinState(const QString &path, PinState state, cfapi::SetPinRecurseMode mode)
{
    Q_ASSERT(mode == cfapi::Recurse || mode == cfapi::NoRecurse);

    const auto p = QDir::toNativeSeparators(path);
    const auto handle = cfapi::handleForPath(p);
    Q_ASSERT(handle);

    const auto result = cfapi::setPinState(p, state, mode);
    Q_ASSERT(result);

    if (mode == cfapi::NoRecurse) {
        const auto result = cfapi::setPinState(p, PinState::Inherited, cfapi::ChildrenOnly);
        Q_ASSERT(result);
    }
}

bool itemInstruction(const ItemCompletedSpy &spy, const QString &path, const SyncInstructions instr)
{
    auto item = spy.findItem(path);
    return item->_instruction == instr;
}

SyncJournalFileRecord dbRecord(FakeFolder &folder, const QString &path)
{
    SyncJournalFileRecord record;
    [[maybe_unused]] const auto result = folder.syncJournal().getFileRecord(path, &record);
    return record;
}

void triggerDownload(FakeFolder &folder, const QByteArray &path)
{
    auto &journal = folder.syncJournal();
    SyncJournalFileRecord record;
    if (!journal.getFileRecord(path, &record) || !record.isValid()) {
        return;
    }
    record._type = ItemTypeVirtualFileDownload;
    QVERIFY(journal.setFileRecord(record));
    journal.schedulePathForRemoteDiscovery(record._path);
}

void markForDehydration(FakeFolder &folder, const QByteArray &path)
{
    auto &journal = folder.syncJournal();
    SyncJournalFileRecord record;
    if (!journal.getFileRecord(path, &record) || !record.isValid()) {
        return;
    }
    record._type = ItemTypeVirtualFileDehydration;
    QVERIFY(journal.setFileRecord(record));
    journal.schedulePathForRemoteDiscovery(record._path);
}

QSharedPointer<Vfs> setupVfs(FakeFolder &folder)
{
    auto cfapiVfs = QSharedPointer<Vfs>(createVfsFromPlugin(Vfs::WindowsCfApi).release());
    QObject::connect(&folder.syncEngine().syncFileStatusTracker(), &SyncFileStatusTracker::fileStatusChanged,
                     cfapiVfs.data(), &Vfs::fileStatusChanged);
    folder.switchToVfs(cfapiVfs);

    ::setPinState(folder.localPath(), PinState::Unspecified, cfapi::NoRecurse);

    return cfapiVfs;
}

class TestSyncCfApi : public QObject
{
    Q_OBJECT

private slots:
    void initTestCase()
    {
        Logger::instance()->setLogFlush(true);
        Logger::instance()->setLogDebug(true);

        QStandardPaths::setTestModeEnabled(true);
    }

    void testVirtualFileLifecycle_data()
    {
        QTest::addColumn<bool>("doLocalDiscovery");

        QTest::newRow("full local discovery") << true;
        QTest::newRow("skip local discovery") << false;
    }

    void testReplaceFileByIdenticalFile()
    {
        FakeFolder fakeFolder{FileInfo{}};
        auto vfs = setupVfs(fakeFolder);
        ItemCompletedSpy completeSpy(fakeFolder);

        // Create a new local (non-placeholder) file
        fakeFolder.localModifier().insert("file0");
        fakeFolder.localModifier().insert("file1");
        CopyFile(QString(fakeFolder.localPath() + "file1").toStdWString().data(), QString(fakeFolder.localPath() + "file2").toStdWString().data(), false);
        QVERIFY(!vfs->pinState("file0").isValid());
        QVERIFY(!vfs->pinState("file1").isValid());
        QVERIFY(!vfs->pinState("file2").isValid());

        // Sync the files: files should be converted to placeholder files
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(vfs->pinState("file0").isValid());
        QVERIFY(vfs->pinState("file1").isValid());
        QVERIFY(vfs->pinState("file2").isValid());

        // Sync again to ensure items are fully synced, otherwise test may succeed due to those pending changes.
        QVERIFY(fakeFolder.syncOnce());
        completeSpy.clear();
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(completeSpy.isEmpty());

        // Replace file1 by identical file2: Windows will convert file1 to a regular (non-placeholder) file again.
        CopyFile(QString(fakeFolder.localPath() + "file2").toStdWString().data(), QString(fakeFolder.localPath() + "file1").toStdWString().data(), false);
        QVERIFY(vfs->pinState("file0").isValid());
        QVERIFY(!vfs->pinState("file1").isValid());
        QVERIFY(vfs->pinState("file2").isValid());

        // Sync again: file should be correctly converted to placeholders
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(vfs->pinState("file0").isValid());
        QVERIFY(vfs->pinState("file1").isValid());
        QVERIFY(vfs->pinState("file2").isValid());
    }

    void testReplaceOnlineOnlyFile()
    {
        FakeFolder fakeFolder{FileInfo{}};
        auto vfs = setupVfs(fakeFolder);

        // Create a new local (non-placeholder) file
        fakeFolder.localModifier().insert("file");
        QVERIFY(!vfs->pinState("file").isValid());

        CopyFile(QString(fakeFolder.localPath() + "file").toStdWString().data(), QString(fakeFolder.localPath() + "file1").toStdWString().data(), false);

        // Sync the files: files should be converted to placeholder files
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(vfs->pinState("file").isValid());

        // Convert to Online Only
        ::setPinState(fakeFolder.localPath() + "file", PinState::OnlineOnly, cfapi::Recurse);

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(*vfs->pinState("file"), PinState::OnlineOnly);
        CFVERIFY_VIRTUAL(fakeFolder, "file");

        // Replace the file
        CopyFile(QString(fakeFolder.localPath() + "file1").toStdWString().data(), QString(fakeFolder.localPath() + "file").toStdWString().data(), false);

        // Sync again: file should be correctly dehydrated again without error.
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(vfs->pinState("file").isValid());
        QCOMPARE(*vfs->pinState("file"), PinState::OnlineOnly);
        CFVERIFY_VIRTUAL(fakeFolder, "file");
    }

    void testVirtualFileLifecycle()
    {
        QFETCH(bool, doLocalDiscovery);

        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        ItemCompletedSpy completeSpy(fakeFolder);

        auto cleanup = [&]() {
            completeSpy.clear();
            if (!doLocalDiscovery)
                fakeFolder.syncEngine().setLocalDiscoveryOptions(LocalDiscoveryStyle::DatabaseAndFilesystem);
        };
        cleanup();

        // Create a virtual file for a new remote file
        fakeFolder.remoteModifier().mkdir("A");
        fakeFolder.remoteModifier().insert("A/a1", 64);
        auto someDate = QDateTime(QDate(1984, 07, 30), QTime(1,3,2));
        fakeFolder.remoteModifier().setModTime("A/a1", someDate);
        QVERIFY(fakeFolder.syncOnce());
        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").size(), 64);
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").lastModified(), someDate);
        QVERIFY(fakeFolder.currentRemoteState().find("A/a1"));
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_NEW));
        cleanup();

        // Another sync doesn't actually lead to changes
        QVERIFY(fakeFolder.syncOnce());
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").size(), 64);
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").lastModified(), someDate);
        QVERIFY(fakeFolder.currentRemoteState().find("A/a1"));
        QVERIFY(completeSpy.isEmpty());
        cleanup();

        // Not even when the remote is rediscovered
        fakeFolder.syncJournal().forceRemoteDiscoveryNextSync();
        QVERIFY(fakeFolder.syncOnce());
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").size(), 64);
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").lastModified(), someDate);
        QVERIFY(fakeFolder.currentRemoteState().find("A/a1"));
        QVERIFY(completeSpy.isEmpty());
        cleanup();

        // Neither does a remote change
        fakeFolder.remoteModifier().appendByte("A/a1");
        QVERIFY(fakeFolder.syncOnce());
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").size(), 65);
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").lastModified(), someDate);
        QVERIFY(fakeFolder.currentRemoteState().find("A/a1"));
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_UPDATE_METADATA));
        QCOMPARE(dbRecord(fakeFolder, "A/a1")._fileSize, 65);
        cleanup();

        // If the local virtual file is removed, this will be propagated remotely
        if (!doLocalDiscovery)
            fakeFolder.syncEngine().setLocalDiscoveryOptions(LocalDiscoveryStyle::DatabaseAndFilesystem, { "A" });
        fakeFolder.localModifier().remove("A/a1");
        QVERIFY(!fakeFolder.syncOnce());
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(!fakeFolder.currentLocalState().find("A/a1"));
        QVERIFY(!fakeFolder.currentRemoteState().find("A/a1"));
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_REMOVE));
        QVERIFY(!dbRecord(fakeFolder, "A/a1").isValid());
        cleanup();

        // Recreate a1 before carrying on with the other tests
        fakeFolder.remoteModifier().insert("A/a1", 65);
        fakeFolder.remoteModifier().setModTime("A/a1", someDate);
        QVERIFY(fakeFolder.syncOnce());
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").size(), 65);
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").lastModified(), someDate);
        QVERIFY(fakeFolder.currentRemoteState().find("A/a1"));
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_NEW));
        cleanup();

        // Remote rename is propagated
        fakeFolder.remoteModifier().rename("A/a1", "A/a1m");
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(!QFileInfo(fakeFolder.localPath() + "A/a1").exists());
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1m");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1m").size(), 65);
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1m").lastModified(), someDate);
        QVERIFY(!fakeFolder.currentRemoteState().find("A/a1"));
        QVERIFY(fakeFolder.currentRemoteState().find("A/a1m"));
        QVERIFY(
            itemInstruction(completeSpy, "A/a1m", CSYNC_INSTRUCTION_RENAME)
            || (itemInstruction(completeSpy, "A/a1m", CSYNC_INSTRUCTION_NEW)
                && itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_REMOVE)));
        QVERIFY(!dbRecord(fakeFolder, "A/a1").isValid());
        cleanup();

        // Remote remove is propagated
        fakeFolder.remoteModifier().remove("A/a1m");
        QVERIFY(!fakeFolder.syncOnce());
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(!QFileInfo(fakeFolder.localPath() + "A/a1m").exists());
        QVERIFY(!fakeFolder.currentRemoteState().find("A/a1m"));
        QVERIFY(itemInstruction(completeSpy, "A/a1m", CSYNC_INSTRUCTION_REMOVE));
        QVERIFY(!dbRecord(fakeFolder, "A/a1").isValid());
        QVERIFY(!dbRecord(fakeFolder, "A/a1m").isValid());
        cleanup();

        // Edge case: Local virtual file but no db entry for some reason
        fakeFolder.remoteModifier().insert("A/a2", 32);
        fakeFolder.remoteModifier().insert("A/a3", 33);
        QVERIFY(fakeFolder.syncOnce());
        CFVERIFY_VIRTUAL(fakeFolder, "A/a2");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a2").size(), 32);
        CFVERIFY_VIRTUAL(fakeFolder, "A/a3");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a3").size(), 33);
        cleanup();

        QVERIFY(fakeFolder.syncEngine().journal()->deleteFileRecord("A/a2"));
        QVERIFY(fakeFolder.syncEngine().journal()->deleteFileRecord("A/a3"));
        fakeFolder.remoteModifier().remove("A/a3");
        fakeFolder.syncEngine().setLocalDiscoveryOptions(LocalDiscoveryStyle::FilesystemOnly);
        QVERIFY(!fakeFolder.syncOnce());
        QVERIFY(fakeFolder.syncOnce());
        CFVERIFY_VIRTUAL(fakeFolder, "A/a2");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a2").size(), 32);
        QVERIFY(itemInstruction(completeSpy, "A/a2", CSYNC_INSTRUCTION_UPDATE_METADATA));
        QVERIFY(!QFileInfo(fakeFolder.localPath() + "A/a3").exists());
        QVERIFY(itemInstruction(completeSpy, "A/a3", CSYNC_INSTRUCTION_REMOVE));
        QVERIFY(!dbRecord(fakeFolder, "A/a3").isValid());
        cleanup();
    }

    void testVirtualFileConflict()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        ItemCompletedSpy completeSpy(fakeFolder);

        auto cleanup = [&]() {
            completeSpy.clear();
        };
        cleanup();

        // Create a virtual file for a new remote file
        fakeFolder.remoteModifier().mkdir("A");
        fakeFolder.remoteModifier().insert("A/a1", 11);
        fakeFolder.remoteModifier().insert("A/a2", 12);
        fakeFolder.remoteModifier().mkdir("B");
        fakeFolder.remoteModifier().insert("B/b1", 21);
        QVERIFY(fakeFolder.syncOnce());
        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a2");
        CFVERIFY_VIRTUAL(fakeFolder, "B/b1");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a1").size(), 11);
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/a2").size(), 12);
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "B/b1").size(), 21);
        cleanup();

        // All the files are touched on the server
        fakeFolder.remoteModifier().appendByte("A/a1");
        fakeFolder.remoteModifier().appendByte("A/a2");
        fakeFolder.remoteModifier().appendByte("B/b1");

        // A: the correct file and a conflicting file are added
        // B: user adds a *directory* locally
        fakeFolder.localModifier().remove("A/a1");
        fakeFolder.localModifier().insert("A/a1", 12);
        fakeFolder.localModifier().remove("A/a2");
        fakeFolder.localModifier().insert("A/a2", 10);
        fakeFolder.localModifier().remove("B/b1");
        fakeFolder.localModifier().mkdir("B/b1");
        fakeFolder.localModifier().insert("B/b1/foo");
        QVERIFY(fakeFolder.syncOnce());

        // Everything is CONFLICT
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_CONFLICT));
        QVERIFY(itemInstruction(completeSpy, "A/a2", CSYNC_INSTRUCTION_CONFLICT));
        QVERIFY(itemInstruction(completeSpy, "B/b1", CSYNC_INSTRUCTION_CONFLICT));

        // conflict files should exist
        QCOMPARE(fakeFolder.syncJournal().conflictRecordPaths().size(), 2);

        // nothing should have the virtual file tag
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a1");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a2");
        CFVERIFY_NONVIRTUAL(fakeFolder, "B/b1");

        cleanup();
    }

    void testWithNormalSync()
    {
        FakeFolder fakeFolder{ FileInfo::A12_B12_C12_S12() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        ItemCompletedSpy completeSpy(fakeFolder);

        auto cleanup = [&]() {
            completeSpy.clear();
        };
        cleanup();

        // No effect sync
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        cleanup();

        // Existing files are propagated just fine in both directions
        fakeFolder.localModifier().appendByte("A/a1");
        fakeFolder.localModifier().insert("A/a3");
        fakeFolder.remoteModifier().appendByte("A/a2");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        cleanup();

        // New files on the remote create virtual files
        fakeFolder.remoteModifier().insert("A/new", 42);
        QVERIFY(fakeFolder.syncOnce());
        CFVERIFY_VIRTUAL(fakeFolder, "A/new");
        QCOMPARE(QFileInfo(fakeFolder.localPath() + "A/new").size(), 42);
        QVERIFY(fakeFolder.currentRemoteState().find("A/new"));
        QVERIFY(itemInstruction(completeSpy, "A/new", CSYNC_INSTRUCTION_NEW));
        cleanup();
    }

    void testVirtualFileDownload()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        ItemCompletedSpy completeSpy(fakeFolder);

        auto cleanup = [&]() {
            completeSpy.clear();
        };
        cleanup();

        // Create a virtual file for remote files
        fakeFolder.remoteModifier().mkdir("A");
        fakeFolder.remoteModifier().insert("A/a1");
        fakeFolder.remoteModifier().insert("A/a2");
        fakeFolder.remoteModifier().insert("A/a3");
        fakeFolder.remoteModifier().insert("A/a4");
        fakeFolder.remoteModifier().insert("A/a5");
        fakeFolder.remoteModifier().insert("A/a6");
        fakeFolder.remoteModifier().insert("A/a7");
        fakeFolder.remoteModifier().insert("A/b1");
        fakeFolder.remoteModifier().insert("A/b2");
        fakeFolder.remoteModifier().insert("A/b3");
        fakeFolder.remoteModifier().insert("A/b4");
        QVERIFY(fakeFolder.syncOnce());

        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a2");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a3");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a4");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a5");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a6");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a7");
        CFVERIFY_VIRTUAL(fakeFolder, "A/b1");
        CFVERIFY_VIRTUAL(fakeFolder, "A/b2");
        CFVERIFY_VIRTUAL(fakeFolder, "A/b3");
        CFVERIFY_VIRTUAL(fakeFolder, "A/b4");

        cleanup();

        // Download by changing the db entry
        triggerDownload(fakeFolder, "A/a1");
        triggerDownload(fakeFolder, "A/a2");
        triggerDownload(fakeFolder, "A/a3");
        triggerDownload(fakeFolder, "A/a4");
        triggerDownload(fakeFolder, "A/a5");
        triggerDownload(fakeFolder, "A/a6");
        triggerDownload(fakeFolder, "A/a7");
        triggerDownload(fakeFolder, "A/b1");
        triggerDownload(fakeFolder, "A/b2");
        triggerDownload(fakeFolder, "A/b3");
        triggerDownload(fakeFolder, "A/b4");

        // Remote complications
        fakeFolder.remoteModifier().appendByte("A/a2");
        fakeFolder.remoteModifier().remove("A/a3");
        fakeFolder.remoteModifier().rename("A/a4", "A/a4m");
        fakeFolder.remoteModifier().appendByte("A/b2");
        fakeFolder.remoteModifier().remove("A/b3");
        fakeFolder.remoteModifier().rename("A/b4", "A/b4m");

        // Local complications
        fakeFolder.localModifier().remove("A/a5");
        fakeFolder.localModifier().insert("A/a5");
        fakeFolder.localModifier().remove("A/a6");
        fakeFolder.localModifier().insert("A/a6");

        QVERIFY(!fakeFolder.syncOnce());
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_SYNC));
        QCOMPARE(completeSpy.findItem("A/a1")->_type, ItemTypeVirtualFileDownload);
        QVERIFY(itemInstruction(completeSpy, "A/a2", CSYNC_INSTRUCTION_SYNC));
        QCOMPARE(completeSpy.findItem("A/a2")->_type, ItemTypeVirtualFileDownload);
        QVERIFY(itemInstruction(completeSpy, "A/a3", CSYNC_INSTRUCTION_REMOVE));
        QVERIFY(itemInstruction(completeSpy, "A/a4m", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "A/a4", CSYNC_INSTRUCTION_REMOVE));
        QVERIFY(itemInstruction(completeSpy, "A/a5", CSYNC_INSTRUCTION_CONFLICT));
        QVERIFY(itemInstruction(completeSpy, "A/a6", CSYNC_INSTRUCTION_CONFLICT));
        QVERIFY(itemInstruction(completeSpy, "A/a7", CSYNC_INSTRUCTION_SYNC));
        QVERIFY(itemInstruction(completeSpy, "A/b1", CSYNC_INSTRUCTION_SYNC));
        QVERIFY(itemInstruction(completeSpy, "A/b2", CSYNC_INSTRUCTION_SYNC));
        QVERIFY(itemInstruction(completeSpy, "A/b3", CSYNC_INSTRUCTION_REMOVE));
        QVERIFY(itemInstruction(completeSpy, "A/b4m", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "A/b4", CSYNC_INSTRUCTION_REMOVE));

        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a1");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a2");
        CFVERIFY_GONE(fakeFolder, "A/a3");
        CFVERIFY_GONE(fakeFolder, "A/a4");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a4m");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a5");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a6");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a7");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/b1");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/b2");
        CFVERIFY_GONE(fakeFolder, "A/b3");
        CFVERIFY_GONE(fakeFolder, "A/b4");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/b4m");

        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
    }

    void testVirtualFileDownloadResume()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        ItemCompletedSpy completeSpy(fakeFolder);

        auto cleanup = [&]() {
            completeSpy.clear();
            QVERIFY(fakeFolder.syncJournal().wipeErrorBlacklist() != -1);
        };
        cleanup();

        // Create a virtual file for remote files
        fakeFolder.remoteModifier().mkdir("A");
        fakeFolder.remoteModifier().insert("A/a1");
        QVERIFY(fakeFolder.syncOnce());
        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        cleanup();

        // Download by changing the db entry
        triggerDownload(fakeFolder, "A/a1");
        fakeFolder.serverErrorPaths().append("A/a1", 500);
        QVERIFY(!fakeFolder.syncOnce());
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_SYNC));
        QVERIFY(cfapi::isSparseFile(fakeFolder.localPath() + "A/a1"));
        QVERIFY(QFileInfo(fakeFolder.localPath() + "A/a1").exists());
        QCOMPARE(dbRecord(fakeFolder, "A/a1")._type, ItemTypeVirtualFileDownload);
        cleanup();

        fakeFolder.serverErrorPaths().clear();
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_SYNC));
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a1");
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
    }

    void testNewFilesNotVirtual()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        fakeFolder.remoteModifier().mkdir("A");
        fakeFolder.remoteModifier().insert("A/a1");
        QVERIFY(fakeFolder.syncOnce());
        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");

        ::setPinState(fakeFolder.localPath(), PinState::AlwaysLocal, cfapi::NoRecurse);

        // Create a new remote file, it'll not be virtual
        fakeFolder.remoteModifier().insert("A/a2");
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a2");
    }

    void testDownloadRecursive()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        // Create a virtual file for remote files
        fakeFolder.remoteModifier().mkdir("A");
        fakeFolder.remoteModifier().mkdir("A/Sub");
        fakeFolder.remoteModifier().mkdir("A/Sub/SubSub");
        fakeFolder.remoteModifier().mkdir("A/Sub2");
        fakeFolder.remoteModifier().mkdir("B");
        fakeFolder.remoteModifier().mkdir("B/Sub");
        fakeFolder.remoteModifier().insert("A/a1");
        fakeFolder.remoteModifier().insert("A/a2");
        fakeFolder.remoteModifier().insert("A/Sub/a3");
        fakeFolder.remoteModifier().insert("A/Sub/a4");
        fakeFolder.remoteModifier().insert("A/Sub/SubSub/a5");
        fakeFolder.remoteModifier().insert("A/Sub2/a6");
        fakeFolder.remoteModifier().insert("B/b1");
        fakeFolder.remoteModifier().insert("B/Sub/b2");
        QVERIFY(fakeFolder.syncOnce());

        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a2");
        CFVERIFY_VIRTUAL(fakeFolder, "A/Sub/a3");
        CFVERIFY_VIRTUAL(fakeFolder, "A/Sub/a4");
        CFVERIFY_VIRTUAL(fakeFolder, "A/Sub/SubSub/a5");
        CFVERIFY_VIRTUAL(fakeFolder, "A/Sub2/a6");
        CFVERIFY_VIRTUAL(fakeFolder, "B/b1");
        CFVERIFY_VIRTUAL(fakeFolder, "B/Sub/b2");

        // Download All file in the directory A/Sub
        // (as in Folder::downloadVirtualFile)
        fakeFolder.syncJournal().markVirtualFileForDownloadRecursively("A/Sub");

        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_VIRTUAL(fakeFolder, "A/a1");
        CFVERIFY_VIRTUAL(fakeFolder, "A/a2");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/Sub/a3");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/Sub/a4");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/Sub/SubSub/a5");
        CFVERIFY_VIRTUAL(fakeFolder, "A/Sub2/a6");
        CFVERIFY_VIRTUAL(fakeFolder, "B/b1");
        CFVERIFY_VIRTUAL(fakeFolder, "B/Sub/b2");

        // Add a file in a subfolder that was downloaded
        // Currently, this continue to add it as a virtual file.
        fakeFolder.remoteModifier().insert("A/Sub/SubSub/a7");
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_VIRTUAL(fakeFolder, "A/Sub/SubSub/a7");

        // Now download all files in "A"
        fakeFolder.syncJournal().markVirtualFileForDownloadRecursively("A");
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a1");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/a2");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/Sub/a3");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/Sub/a4");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/Sub/SubSub/a5");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/Sub/SubSub/a7");
        CFVERIFY_NONVIRTUAL(fakeFolder, "A/Sub2/a6");
        CFVERIFY_VIRTUAL(fakeFolder, "B/b1");
        CFVERIFY_VIRTUAL(fakeFolder, "B/Sub/b2");

        // Now download remaining files in "B"
        fakeFolder.syncJournal().markVirtualFileForDownloadRecursively("B");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
    }

    void testRenameVirtual()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        ItemCompletedSpy completeSpy(fakeFolder);

        auto cleanup = [&]() {
            completeSpy.clear();
        };
        cleanup();

        fakeFolder.remoteModifier().insert("file1", 128, 'C');
        fakeFolder.remoteModifier().insert("file2", 256, 'C');
        fakeFolder.remoteModifier().insert("file3", 256, 'C');
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_VIRTUAL(fakeFolder, "file1");
        CFVERIFY_VIRTUAL(fakeFolder, "file2");
        CFVERIFY_VIRTUAL(fakeFolder, "file3");

        cleanup();

        fakeFolder.localModifier().rename("file1", "renamed1");
        fakeFolder.localModifier().rename("file2", "renamed2");
        triggerDownload(fakeFolder, "file2");
        triggerDownload(fakeFolder, "file3");
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_GONE(fakeFolder, "file1");
        CFVERIFY_VIRTUAL(fakeFolder, "renamed1");

        QVERIFY(fakeFolder.currentRemoteState().find("renamed1"));
        QVERIFY(itemInstruction(completeSpy, "renamed1", CSYNC_INSTRUCTION_RENAME));

        // file2 has a conflict between the download request and the rename:
        // the rename wins, the download is ignored

        CFVERIFY_GONE(fakeFolder, "file2");
        CFVERIFY_VIRTUAL(fakeFolder, "renamed2");

        QVERIFY(fakeFolder.currentRemoteState().find("renamed2"));
        QVERIFY(itemInstruction(completeSpy, "renamed2", CSYNC_INSTRUCTION_RENAME));

        QVERIFY(itemInstruction(completeSpy, "file3", CSYNC_INSTRUCTION_SYNC));
        CFVERIFY_NONVIRTUAL(fakeFolder, "file3");
        cleanup();
    }

    void testRenameVirtual2()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        ItemCompletedSpy completeSpy(fakeFolder);
        auto cleanup = [&]() {
            completeSpy.clear();
        };
        cleanup();

        fakeFolder.remoteModifier().insert("case3", 128, 'C');
        fakeFolder.remoteModifier().insert("case4", 256, 'C');
        QVERIFY(fakeFolder.syncOnce());

        triggerDownload(fakeFolder, "case4");
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_VIRTUAL(fakeFolder, "case3");
        CFVERIFY_NONVIRTUAL(fakeFolder, "case4");

        cleanup();

        // Case 1: non-virtual, foo -> bar (tested elsewhere)
        // Case 2: virtual, foo -> bar (tested elsewhere)

        // Case 3: virtual, foo.oc -> bar.oc (db hydrate)
        fakeFolder.localModifier().rename("case3", "case3-rename");
        triggerDownload(fakeFolder, "case3");

        // Case 4: non-virtual foo -> bar (db dehydrate)
        fakeFolder.localModifier().rename("case4", "case4-rename");
        markForDehydration(fakeFolder, "case4");

        QVERIFY(fakeFolder.syncOnce());

        // Case 3: the rename went though, hydration is forgotten
        CFVERIFY_GONE(fakeFolder, "case3");
        CFVERIFY_VIRTUAL(fakeFolder, "case3-rename");
        QVERIFY(!fakeFolder.currentRemoteState().find("case3"));
        QVERIFY(fakeFolder.currentRemoteState().find("case3-rename"));
        QVERIFY(itemInstruction(completeSpy, "case3-rename", CSYNC_INSTRUCTION_RENAME));

        // Case 4: the rename went though, dehydration is forgotten
        CFVERIFY_GONE(fakeFolder, "case4");
        CFVERIFY_NONVIRTUAL(fakeFolder, "case4-rename");
        QVERIFY(!fakeFolder.currentRemoteState().find("case4"));
        QVERIFY(fakeFolder.currentRemoteState().find("case4-rename"));
        QVERIFY(itemInstruction(completeSpy, "case4-rename", CSYNC_INSTRUCTION_RENAME));
    }

    // Dehydration via sync works
    void testSyncDehydration()
    {
        FakeFolder fakeFolder{ FileInfo::A12_B12_C12_S12() };
        // empty files would not work, so, we're gonna remove and re-insert them with 1MB data
        fakeFolder.remoteModifier().remove("A/a1");
        fakeFolder.remoteModifier().remove("A/a2");
        fakeFolder.remoteModifier().insert("A/a1", 1024 * 1024);
        fakeFolder.remoteModifier().insert("A/a2", 1024 * 1024);
        setupVfs(fakeFolder);

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        ItemCompletedSpy completeSpy(fakeFolder);
        auto cleanup = [&]() {
            completeSpy.clear();
        };
        cleanup();

        //
        // Mark for dehydration and check
        //

        QVERIFY(fakeFolder.currentLocalState().find("A/a1"));

        markForDehydration(fakeFolder, "A/a1");

        markForDehydration(fakeFolder, "A/a2");
        fakeFolder.remoteModifier().appendByte("A/a2");
        // expect: normal dehydration

        markForDehydration(fakeFolder, "B/b1");
        fakeFolder.remoteModifier().remove("B/b1");
        // expect: local removal

        markForDehydration(fakeFolder, "B/b2");
        fakeFolder.remoteModifier().rename("B/b2", "B/b3");
        // expect: B/b2 is gone, B/b3 is NEW placeholder

        markForDehydration(fakeFolder, "C/c1");
        fakeFolder.localModifier().appendByte("C/c1");
        // expect: no dehydration, upload of c1

        markForDehydration(fakeFolder, "C/c2");
        fakeFolder.localModifier().appendByte("C/c2");
        fakeFolder.remoteModifier().appendByte("C/c2");
        fakeFolder.remoteModifier().appendByte("C/c2");
        // expect: no dehydration, conflict

        QVERIFY(fakeFolder.syncOnce());

        auto isDehydrated = [&](const QString &path) {
            return cfapi::isSparseFile(fakeFolder.localPath() + path)
                && QFileInfo(fakeFolder.localPath() + path).exists();
        };
        auto hasDehydratedDbEntries = [&](const QString &path) {
            SyncJournalFileRecord rec;
            return fakeFolder.syncJournal().getFileRecord(path, &rec) && rec.isValid() && rec._type == ItemTypeVirtualFile;
        };

        QVERIFY(isDehydrated("A/a1"));
        QVERIFY(hasDehydratedDbEntries("A/a1"));
        QVERIFY(itemInstruction(completeSpy, "A/a1", CSYNC_INSTRUCTION_SYNC));
        QCOMPARE(completeSpy.findItem("A/a1")->_type, ItemTypeVirtualFileDehydration);
        QCOMPARE(completeSpy.findItem("A/a1")->_file, QStringLiteral("A/a1"));
        QVERIFY(isDehydrated("A/a2"));
        QVERIFY(hasDehydratedDbEntries("A/a2"));
        QVERIFY(itemInstruction(completeSpy, "A/a2", CSYNC_INSTRUCTION_SYNC));
        QCOMPARE(completeSpy.findItem("A/a2")->_type, ItemTypeVirtualFileDehydration);

        QVERIFY(!QFileInfo(fakeFolder.localPath() + "B/b1").exists());
        QVERIFY(!fakeFolder.currentRemoteState().find("B/b1"));
        QVERIFY(itemInstruction(completeSpy, "B/b1", CSYNC_INSTRUCTION_REMOVE));

        QVERIFY(!QFileInfo(fakeFolder.localPath() + "B/b2").exists());
        QVERIFY(!fakeFolder.currentRemoteState().find("B/b2"));
        QVERIFY(isDehydrated("B/b3"));
        QVERIFY(hasDehydratedDbEntries("B/b3"));
        QVERIFY(itemInstruction(completeSpy, "B/b2", CSYNC_INSTRUCTION_REMOVE));
        QVERIFY(itemInstruction(completeSpy, "B/b3", CSYNC_INSTRUCTION_NEW));

        QCOMPARE(fakeFolder.currentRemoteState().find("C/c1")->size, 25);
        QVERIFY(itemInstruction(completeSpy, "C/c1", CSYNC_INSTRUCTION_SYNC));

        QCOMPARE(fakeFolder.currentRemoteState().find("C/c2")->size, 26);
        QVERIFY(itemInstruction(completeSpy, "C/c2", CSYNC_INSTRUCTION_CONFLICT));
        cleanup();

        auto expectedRemoteState = fakeFolder.currentRemoteState();
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentRemoteState(), expectedRemoteState);

        QVERIFY(isDehydrated("A/a1"));
        QVERIFY(hasDehydratedDbEntries("A/a1"));
        QVERIFY(isDehydrated("A/a2"));
        QVERIFY(hasDehydratedDbEntries("A/a2"));

        QVERIFY(!QFileInfo(fakeFolder.localPath() + "B/b1").exists());
        QVERIFY(!QFileInfo(fakeFolder.localPath() + "B/b2").exists());
        QVERIFY(isDehydrated("B/b3"));
        QVERIFY(hasDehydratedDbEntries("B/b3"));

        QVERIFY(QFileInfo(fakeFolder.localPath() + "C/c1").exists());
        QVERIFY(dbRecord(fakeFolder, "C/c1").isValid());
        QVERIFY(!isDehydrated("C/c1"));
        QVERIFY(!hasDehydratedDbEntries("C/c1"));

        QVERIFY(QFileInfo(fakeFolder.localPath() + "C/c2").exists());
        QVERIFY(dbRecord(fakeFolder, "C/c2").isValid());
        QVERIFY(!isDehydrated("C/c2"));
        QVERIFY(!hasDehydratedDbEntries("C/c2"));
    }

    void testNewVirtuals()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        fakeFolder.remoteModifier().mkdir("local");
        fakeFolder.remoteModifier().mkdir("online");
        fakeFolder.remoteModifier().mkdir("unspec");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        ::setPinState(fakeFolder.localPath() + "local", PinState::AlwaysLocal, cfapi::Recurse);
        ::setPinState(fakeFolder.localPath() + "online", PinState::OnlineOnly, cfapi::Recurse);
        ::setPinState(fakeFolder.localPath() + "unspec", PinState::Unspecified, cfapi::Recurse);

        // Test 1: root is Unspecified
        fakeFolder.remoteModifier().insert("file1", 1024 * 1024);
        fakeFolder.remoteModifier().insert("online/file1", 1024 * 1024);
        fakeFolder.remoteModifier().insert("local/file1", 1024 * 1024);
        fakeFolder.remoteModifier().insert("unspec/file1", 1024 * 1024);
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_VIRTUAL(fakeFolder, "file1");
        CFVERIFY_VIRTUAL(fakeFolder, "online/file1");
        CFVERIFY_NONVIRTUAL(fakeFolder, "local/file1");
        CFVERIFY_VIRTUAL(fakeFolder, "unspec/file1");

        // Test 2: change root to AlwaysLocal
        ::setPinState(fakeFolder.localPath(), PinState::AlwaysLocal, cfapi::Recurse);
        // Need to force pin state for the subfolders again
        ::setPinState(fakeFolder.localPath() + "local", PinState::AlwaysLocal, cfapi::Recurse);
        ::setPinState(fakeFolder.localPath() + "online", PinState::OnlineOnly, cfapi::Recurse);
        ::setPinState(fakeFolder.localPath() + "unspec", PinState::Unspecified, cfapi::Recurse);

        fakeFolder.remoteModifier().insert("file2", 1024 * 1024);
        fakeFolder.remoteModifier().insert("online/file2", 1024 * 1024);
        fakeFolder.remoteModifier().insert("local/file2", 1024 * 1024);
        fakeFolder.remoteModifier().insert("unspec/file2", 1024 * 1024);
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_NONVIRTUAL(fakeFolder, "file2");
        CFVERIFY_VIRTUAL(fakeFolder, "online/file2");
        CFVERIFY_NONVIRTUAL(fakeFolder, "local/file2");
        CFVERIFY_VIRTUAL(fakeFolder, "unspec/file2");

        // root file1 was hydrated due to its new pin state
        CFVERIFY_NONVIRTUAL(fakeFolder, "file1");

        // file1 is unchanged in the explicitly pinned subfolders
        CFVERIFY_VIRTUAL(fakeFolder, "online/file1");
        CFVERIFY_NONVIRTUAL(fakeFolder, "local/file1");
        CFVERIFY_VIRTUAL(fakeFolder, "unspec/file1");

        // Test 3: change root to OnlineOnly
        ::setPinState(fakeFolder.localPath(), PinState::OnlineOnly, cfapi::Recurse);
        // Need to force pin state for the subfolders again
        ::setPinState(fakeFolder.localPath() + "local", PinState::AlwaysLocal, cfapi::Recurse);
        ::setPinState(fakeFolder.localPath() + "online", PinState::OnlineOnly, cfapi::Recurse);
        ::setPinState(fakeFolder.localPath() + "unspec", PinState::Unspecified, cfapi::Recurse);

        fakeFolder.remoteModifier().insert("file3", 1024 * 1024);
        fakeFolder.remoteModifier().insert("online/file3", 1024 * 1024);
        fakeFolder.remoteModifier().insert("local/file3", 1024 * 1024);
        fakeFolder.remoteModifier().insert("unspec/file3", 1024 * 1024);
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_VIRTUAL(fakeFolder, "file3");
        CFVERIFY_VIRTUAL(fakeFolder, "online/file3");
        CFVERIFY_NONVIRTUAL(fakeFolder, "local/file3");
        CFVERIFY_VIRTUAL(fakeFolder, "unspec/file3");

        // root file1 was dehydrated due to its new pin state
        CFVERIFY_VIRTUAL(fakeFolder, "file1");

        // file1 is unchanged in the explicitly pinned subfolders
        CFVERIFY_VIRTUAL(fakeFolder, "online/file1");
        CFVERIFY_NONVIRTUAL(fakeFolder, "local/file1");
        CFVERIFY_VIRTUAL(fakeFolder, "unspec/file1");
    }

    void testAvailability()
    {
        FakeFolder fakeFolder{ FileInfo() };
        auto vfs = setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        fakeFolder.remoteModifier().mkdir("local");
        fakeFolder.remoteModifier().mkdir("local/sub");
        fakeFolder.remoteModifier().mkdir("online");
        fakeFolder.remoteModifier().mkdir("online/sub");
        fakeFolder.remoteModifier().mkdir("unspec");
        QVERIFY(fakeFolder.syncOnce());
        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        ::setPinState(fakeFolder.localPath() + "local", PinState::AlwaysLocal, cfapi::Recurse);
        ::setPinState(fakeFolder.localPath() + "online", PinState::OnlineOnly, cfapi::Recurse);
        ::setPinState(fakeFolder.localPath() + "unspec", PinState::Unspecified, cfapi::Recurse);

        fakeFolder.remoteModifier().insert("file1", 1024 * 1024);
        fakeFolder.remoteModifier().insert("online/file1", 1024 * 1024);
        fakeFolder.remoteModifier().insert("online/file2", 1024 * 1024);
        fakeFolder.remoteModifier().insert("local/file1", 1024 * 1024);
        fakeFolder.remoteModifier().insert("local/file2", 1024 * 1024);
        fakeFolder.remoteModifier().insert("unspec/file1", 1024 * 1024);
        QVERIFY(fakeFolder.syncOnce());

        // root is unspecified
        QCOMPARE(*vfs->availability("file1", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AllDehydrated);
        QCOMPARE(*vfs->availability("local", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AlwaysLocal);
        QCOMPARE(*vfs->availability("local/file1", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AlwaysLocal);
        QCOMPARE(*vfs->availability("online", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::OnlineOnly);
        QCOMPARE(*vfs->availability("online/file1", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::OnlineOnly);
        QCOMPARE(*vfs->availability("unspec", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AllDehydrated);
        QCOMPARE(*vfs->availability("unspec/file1", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AllDehydrated);

        // Subitem pin states can ruin "pure" availabilities
        ::setPinState(fakeFolder.localPath() + "local/sub", PinState::OnlineOnly, cfapi::NoRecurse);
        QCOMPARE(*vfs->availability("local", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AllHydrated);
        ::setPinState(fakeFolder.localPath() + "online/sub", PinState::Unspecified, cfapi::NoRecurse);
        QCOMPARE(*vfs->availability("online", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AllDehydrated);

        triggerDownload(fakeFolder, "unspec/file1");
        ::setPinState(fakeFolder.localPath() + "local/file2", PinState::OnlineOnly, cfapi::NoRecurse);
        ::setPinState(fakeFolder.localPath() + "online/file2", PinState::AlwaysLocal, cfapi::NoRecurse);
        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(*vfs->availability("unspec", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AllHydrated);
        QCOMPARE(*vfs->availability("local", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::Mixed);
        QCOMPARE(*vfs->availability("online", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::Mixed);

        QVERIFY(vfs->setPinState("local", PinState::AlwaysLocal));
        QVERIFY(vfs->setPinState("online", PinState::OnlineOnly));
        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(*vfs->availability("online", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::OnlineOnly);
        QCOMPARE(*vfs->availability("local", Vfs::AvailabilityRecursivity::RecursiveAvailability), VfsItemAvailability::AlwaysLocal);

        auto r = vfs->availability("nonexistent", Vfs::AvailabilityRecursivity::RecursiveAvailability);
        QVERIFY(!r);
        QCOMPARE(r.error(), Vfs::AvailabilityError::NoSuchItem);
    }

    void testPinStateLocals()
    {
        FakeFolder fakeFolder{ FileInfo() };
        auto vfs = setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        fakeFolder.remoteModifier().mkdir("local");
        fakeFolder.remoteModifier().mkdir("online");
        fakeFolder.remoteModifier().mkdir("unspec");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        ::setPinState(fakeFolder.localPath() + "local", PinState::AlwaysLocal, cfapi::NoRecurse);
        ::setPinState(fakeFolder.localPath() + "online", PinState::OnlineOnly, cfapi::NoRecurse);
        ::setPinState(fakeFolder.localPath() + "unspec", PinState::Unspecified, cfapi::NoRecurse);

        fakeFolder.localModifier().insert("file1", 1024 * 1024);
        fakeFolder.localModifier().insert("online/file1", 1024 * 1024);
        fakeFolder.localModifier().insert("online/file2", 1024 * 1024);
        fakeFolder.localModifier().insert("local/file1", 1024 * 1024);
        fakeFolder.localModifier().insert("unspec/file1", 1024 * 1024);
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        // root is unspecified
        QCOMPARE(*vfs->pinState("file1"), PinState::Unspecified);
        QCOMPARE(*vfs->pinState("local/file1"), PinState::AlwaysLocal);
        QCOMPARE(*vfs->pinState("online/file1"), PinState::Unspecified);
        QCOMPARE(*vfs->pinState("unspec/file1"), PinState::Unspecified);

        // Sync again: bad pin states of new local files usually take effect on second sync
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        // When a file in an online-only folder is renamed, it retains its pin
        fakeFolder.localModifier().rename("online/file1", "online/file1rename");
        fakeFolder.remoteModifier().rename("online/file2", "online/file2rename");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(*vfs->pinState("online/file1rename"), PinState::Unspecified);
        QCOMPARE(*vfs->pinState("online/file2rename"), PinState::Unspecified);

        // When a folder is renamed, the pin states inside should be retained
        fakeFolder.localModifier().rename("online", "onlinerenamed1");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(*vfs->pinState("onlinerenamed1"), PinState::OnlineOnly);
        QCOMPARE(*vfs->pinState("onlinerenamed1/file1rename"), PinState::Unspecified);

        fakeFolder.remoteModifier().rename("onlinerenamed1", "onlinerenamed2");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(*vfs->pinState("onlinerenamed2"), PinState::OnlineOnly);
        QCOMPARE(*vfs->pinState("onlinerenamed2/file1rename"), PinState::Unspecified);

        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        // When a file is deleted and later a new file has the same name, the old pin
        // state isn't preserved.
        QCOMPARE(*vfs->pinState("onlinerenamed2/file1rename"), PinState::Unspecified);
        fakeFolder.remoteModifier().remove("onlinerenamed2/file1rename");
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(!vfs->pinState("onlinerenamed2/file1rename"));
        fakeFolder.remoteModifier().insert("onlinerenamed2/file1rename", 1024 * 1024);
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(*vfs->pinState("onlinerenamed2/file1rename"), PinState::OnlineOnly);

        // When a file is hydrated or dehydrated due to pin state it retains its pin state
        QVERIFY(vfs->setPinState("onlinerenamed2/file1rename", PinState::AlwaysLocal));
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(fakeFolder.currentLocalState().find("onlinerenamed2/file1rename"));
        QCOMPARE(*vfs->pinState("onlinerenamed2/file1rename"), PinState::AlwaysLocal);

        QVERIFY(vfs->setPinState("onlinerenamed2", PinState::Unspecified));
        QVERIFY(vfs->setPinState("onlinerenamed2/file1rename", PinState::OnlineOnly));
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_VIRTUAL(fakeFolder, "onlinerenamed2/file1rename");

        QCOMPARE(*vfs->pinState("onlinerenamed2/file1rename"), PinState::OnlineOnly);
    }

    void testEmptyFolderInOnlineOnlyRoot()
    {
        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        ItemCompletedSpy completeSpy(fakeFolder);

        auto cleanup = [&]() {
            completeSpy.clear();
        };
        cleanup();

        // OnlineOnly forced on the root
        ::setPinState(fakeFolder.localPath(), PinState::OnlineOnly, cfapi::NoRecurse);

        // No effect sync
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        cleanup();

        // Add an empty folder which should propagate
        fakeFolder.localModifier().mkdir("A");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        cleanup();
    }

    void testIncompatiblePins()
    {
        FakeFolder fakeFolder{ FileInfo() };
        auto vfs = setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        fakeFolder.remoteModifier().mkdir("local");
        fakeFolder.remoteModifier().mkdir("online");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        ::setPinState(fakeFolder.localPath() + "local", PinState::AlwaysLocal, cfapi::NoRecurse);
        ::setPinState(fakeFolder.localPath() + "online", PinState::OnlineOnly, cfapi::NoRecurse);

        fakeFolder.localModifier().insert("local/file1", 1024 * 1024);
        fakeFolder.localModifier().insert("online/file1", 1024 * 1024);
        QVERIFY(fakeFolder.syncOnce());

        ::setPinState(fakeFolder.localPath() + "local/file1", PinState::Unspecified, cfapi::Recurse);
        markForDehydration(fakeFolder, "local/file1");
        triggerDownload(fakeFolder, "online/file1");

        // the sync sets the changed files pin states to unspecified
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_NONVIRTUAL(fakeFolder, "online/file1");
        CFVERIFY_VIRTUAL(fakeFolder, "local/file1");

        QCOMPARE(*vfs->pinState("online/file1"), PinState::Unspecified);
        QCOMPARE(*vfs->pinState("local/file1"), PinState::OnlineOnly);

        // no change on another sync
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_NONVIRTUAL(fakeFolder, "online/file1");
        CFVERIFY_VIRTUAL(fakeFolder, "local/file1");
    }

    void testOpeningOnlineFileTriggersDownload_data()
    {
        QTest::addColumn<int>("errorKind");
        QTest::newRow("no error") << static_cast<int>(NoError);
        QTest::newRow("400") << 400;
        QTest::newRow("401") << 401;
        QTest::newRow("403") << 403;
        QTest::newRow("404") << 404;
        QTest::newRow("500") << 500;
        QTest::newRow("503") << 503;
        QTest::newRow("Timeout") << static_cast<int>(Timeout);
    }

    void testOpeningOnlineFileTriggersDownload()
    {
        QFETCH(int, errorKind);

        FakeFolder fakeFolder{ FileInfo() };
        setupVfs(fakeFolder);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        fakeFolder.remoteModifier().mkdir("online");
        fakeFolder.remoteModifier().mkdir("online/sub");
        QVERIFY(fakeFolder.syncOnce());
        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        ::setPinState(fakeFolder.localPath() + "online", PinState::OnlineOnly, cfapi::Recurse);

        fakeFolder.remoteModifier().insert("online/sub/file1", 10 * 1024 * 1024);
        QVERIFY(fakeFolder.syncOnce());

        CFVERIFY_VIRTUAL(fakeFolder, "online/sub/file1");

        // Setup error case if needed
        if (errorKind == Timeout) {
            fakeFolder.setServerOverride([&](QNetworkAccessManager::Operation op, const QNetworkRequest &req, QIODevice *) -> QNetworkReply * {
                if (req.url().path().endsWith("online/sub/file1")) {
                    return new FakeHangingReply(op, req, this);
                }
                return nullptr;
            });
        } else if (errorKind != NoError) {
            fakeFolder.serverErrorPaths().append("online/sub/file1", errorKind);
        }

        // So the test that test timeout finishes fast
        QScopedValueRollback<int> setHttpTimeout(AbstractNetworkJob::httpTimeout, errorKind == Timeout ? 1 : 10000);

        // Simulate another process requesting the open
        QEventLoop loop;
        std::thread t([&] {
            QFile file(fakeFolder.localPath() + "online/sub/file1");
            if (file.open(QFile::ReadOnly)) {
                file.readAll();
                file.close();
            }
            QMetaObject::invokeMethod(&loop, &QEventLoop::quit, Qt::QueuedConnection);
        });
        loop.exec();
        t.detach();

        // if (errorKind == NoError) {
        //     CFVERIFY_NONVIRTUAL(fakeFolder, "online/sub/file1");
        // } else {
        //     CFVERIFY_VIRTUAL(fakeFolder, "online/sub/file1");
        // }

        // Nothing should change
        ItemCompletedSpy completeSpy(fakeFolder);
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(completeSpy.isEmpty());

        // if (errorKind == NoError) {
        //     CFVERIFY_NONVIRTUAL(fakeFolder, "online/sub/file1");
        // } else {
        //     CFVERIFY_VIRTUAL(fakeFolder, "online/sub/file1");
        // }
    }

    void testDataFingerPrint()
    {
        FakeFolder fakeFolder{ FileInfo{} };
        setupVfs(fakeFolder);

        fakeFolder.remoteModifier().mkdir("a");
        fakeFolder.remoteModifier().mkdir("a/b");
        fakeFolder.remoteModifier().mkdir("a/b/d");
        fakeFolder.remoteModifier().insert("a/b/otherFile.txt");

        //Server support finger print, but none is set.
        fakeFolder.remoteModifier().extraDavProperties = "<oc:data-fingerprint></oc:data-fingerprint>";

        fakeFolder.syncEngine().setLocalDiscoveryOptions(OCC::LocalDiscoveryStyle::DatabaseAndFilesystem);
        QVERIFY(fakeFolder.syncOnce());

        fakeFolder.remoteModifier().remove("a/b/otherFile.txt");
        fakeFolder.remoteModifier().remove("a/b/d");
        fakeFolder.remoteModifier().extraDavProperties = "<oc:data-fingerprint>initial_finger_print</oc:data-fingerprint>";

        fakeFolder.syncEngine().setLocalDiscoveryOptions(OCC::LocalDiscoveryStyle::DatabaseAndFilesystem);
        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
    }

    void testLockFile_lockedFileReadOnly_afterSync()
    {
        FakeFolder fakeFolder{ FileInfo{} };
        setupVfs(fakeFolder);

        ItemCompletedSpy completeSpy(fakeFolder);

        fakeFolder.remoteModifier().mkdir("A");
        fakeFolder.remoteModifier().insert("A/a1");

        completeSpy.clear();
        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(completeSpy.findItem(QStringLiteral("A/a1"))->_locked, OCC::SyncFileItem::LockStatus::UnlockedItem);
        OCC::SyncJournalFileRecord fileRecordBefore;
        QVERIFY(fakeFolder.syncJournal().getFileRecord(QStringLiteral("A/a1"), &fileRecordBefore));
        QEXPECT_FAIL("", "folders on-demand breaks existing tests", Abort);
        QVERIFY(fileRecordBefore.isValid());
        QVERIFY(!fileRecordBefore._lockstate._locked);

        const auto localFileNotLocked = QFileInfo{fakeFolder.localPath() + u"A/a1"};
        QVERIFY(localFileNotLocked.isWritable());

        fakeFolder.remoteModifier().modifyLockState(QStringLiteral("A/a1"), FileModifier::LockState::FileLocked, 1, QStringLiteral("Nextcloud Office"), {}, QStringLiteral("richdocuments"), QDateTime::currentDateTime().toSecsSinceEpoch(), 1226);
        fakeFolder.remoteModifier().setModTimeKeepEtag(QStringLiteral("A/a1"), QDateTime::currentDateTime());
        fakeFolder.remoteModifier().appendByte(QStringLiteral("A/a1"));

        completeSpy.clear();
        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(completeSpy.findItem(QStringLiteral("A/a1"))->_locked, OCC::SyncFileItem::LockStatus::LockedItem);
        OCC::SyncJournalFileRecord fileRecordLocked;
        QVERIFY(fakeFolder.syncJournal().getFileRecord(QStringLiteral("A/a1"), &fileRecordLocked));
        QVERIFY(fileRecordLocked.isValid());
        QVERIFY(fileRecordLocked._lockstate._locked);

        const auto localFileLocked = QFileInfo{fakeFolder.localPath() + u"A/a1"};
        QVERIFY(!localFileLocked.isWritable());
    }

    void testLinkFileDownload()
    {
        FakeFolder fakeFolder{FileInfo{}};
        auto vfs = setupVfs(fakeFolder);

        qInfo("Starting .lnk test. It might hand and will get killed after timeout...");

        // Create a Windows shortcut (.lnk) file
        fakeFolder.remoteModifier().insert("linkfile.lnk");

        QVERIFY(fakeFolder.syncOnce());
        ItemCompletedSpy completeSpy(fakeFolder);
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(vfs->pinState("linkfile.lnk").isValid());
        QVERIFY(itemInstruction(completeSpy, "linkfile.lnk", CSYNC_INSTRUCTION_NONE));
        triggerDownload(fakeFolder, "linkfile.lnk");
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(itemInstruction(completeSpy, "linkfile.lnk", CSYNC_INSTRUCTION_SYNC));

        // a real .lnk file contents stored as base64 for tests
        QFile fakeShortcutBase64(QStringLiteral("fakeshortcut.base64"));
        QVERIFY(fakeShortcutBase64.open(QFile::ReadOnly));
        const auto fakeShortcutBase64Binary = QByteArray::fromBase64(fakeShortcutBase64.readAll());
        fakeShortcutBase64.close();
        
        // fill the .lnk file with binary data from real shortcut and turn it into OnlineOnly file
        const QString shortcutFilePathOnDisk = fakeFolder.localPath() + "linkfile.lnk";
        QFile shorcutFileOnDisk(shortcutFilePathOnDisk);
        QVERIFY(shorcutFileOnDisk.open(QFile::WriteOnly));
        QVERIFY(shorcutFileOnDisk.write(fakeShortcutBase64Binary));
        shorcutFileOnDisk.close();

        // run tests on it
        ::setPinState(shortcutFilePathOnDisk, PinState::OnlineOnly, cfapi::NoRecurse);
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(vfs->pinState("linkfile.lnk").isValid());
        QVERIFY(itemInstruction(completeSpy, "linkfile.lnk", CSYNC_INSTRUCTION_SYNC));

        // trigget download of online only .lnk file
        triggerDownload(fakeFolder, "linkfile.lnk");
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(vfs->pinState("linkfile.lnk").isValid());
        QVERIFY(itemInstruction(completeSpy, "linkfile.lnk", CSYNC_INSTRUCTION_SYNC));

        qInfo("Finishing .lnk test");
    }

    void testFolderDoesNotUpdatePlaceholderMetadata()
    {
        FakeFolder fakeFolder{FileInfo{}};
        auto vfs = setupVfs(fakeFolder);

        fakeFolder.remoteModifier().mkdir("A");
        fakeFolder.remoteModifier().insert("A/file");

        QVERIFY(fakeFolder.syncOnce());
        ItemCompletedSpy completeSpy(fakeFolder);
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(itemInstruction(completeSpy, "A", CSYNC_INSTRUCTION_NONE));
    }

    void testRemoteTypeChangeExistingLocalMustGetRemoved()
    {
        FakeFolder fakeFolder{FileInfo{}};
        setupVfs(fakeFolder);

        // test file change to directory on remote
        fakeFolder.remoteModifier().mkdir("a");
        fakeFolder.remoteModifier().insert("a/TESTFILE");
        QVERIFY(fakeFolder.syncOnce());

        fakeFolder.remoteModifier().remove("a/TESTFILE");
        fakeFolder.remoteModifier().mkdir("a/TESTFILE");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());


        // test directory change to file on remote
        fakeFolder.remoteModifier().mkdir("a/TESTDIR");
        QVERIFY(fakeFolder.syncOnce());

        fakeFolder.remoteModifier().remove("a/TESTDIR");
        fakeFolder.remoteModifier().insert("a/TESTDIR");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
    }

    void testDetectSpuriousNotification() {
#if !defined Q_OS_WIN
        QSKIP("not applicable");
#endif
        FakeFolder fakeFolder{FileInfo{}};
        auto vfs = setupVfs(fakeFolder);

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());

        const QString odpFile("odp/presentation.odp");
        const QString odtFile("odt/document.odt");
        fakeFolder.localModifier().mkdir("odp");
        fakeFolder.localModifier().insert(odpFile);
        fakeFolder.localModifier().mkdir("odt");
        fakeFolder.localModifier().insert(odtFile);

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
        ItemCompletedSpy completeSpy(fakeFolder);

        QFile odp(fakeFolder.localPath() + odpFile);
        QVERIFY(odp.open(QIODevice::ReadWrite));
        odp.write(odpFile.toLatin1(), qstrlen(odpFile.toLatin1()));
        odp.close();
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(itemInstruction(completeSpy, odpFile, CSYNC_INSTRUCTION_SYNC));
        QCOMPARE(*vfs->pinState(odpFile), PinState::Unspecified);

        QFile odt(fakeFolder.localPath() + odtFile);
        QVERIFY(odt.open(QIODevice::ReadWrite));
        odt.close();
        QVERIFY(fakeFolder.syncOnce());
        QVERIFY(itemInstruction(completeSpy, odtFile, CSYNC_INSTRUCTION_UPDATE_METADATA));
        QCOMPARE(*vfs->pinState(odtFile), PinState::Unspecified);
    }

    void renameOnBothSides()
    {
        FakeFolder fakeFolder { FileInfo::A12_B12_C12_S12() };
        auto vfs = setupVfs(fakeFolder);

        // Test that renaming a file within a directory that was renamed on the other side actually do a rename.

        // 1) move the folder alphabetically before
        fakeFolder.remoteModifier().rename("A/a1", "A/a1m");
        fakeFolder.localModifier().rename("A", "_A");
        fakeFolder.localModifier().rename("B/b1", "B/b1m");
        fakeFolder.remoteModifier().rename("B", "_B");

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentRemoteState(), fakeFolder.currentLocalState());
        QVERIFY(fakeFolder.currentRemoteState().find("_A/a1m"));
        QVERIFY(fakeFolder.currentRemoteState().find("_B/b1m"));

        // 2) move alphabetically after
        fakeFolder.remoteModifier().rename("_A/a2", "_A/a2m");
        fakeFolder.localModifier().rename("_B/b2", "_B/b2m");
        fakeFolder.localModifier().rename("_A", "S/A");
        fakeFolder.remoteModifier().rename("_B", "S/B");
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(fakeFolder.currentRemoteState(), fakeFolder.currentLocalState());
        QVERIFY(fakeFolder.currentRemoteState().find("S/A/a2m"));
        QVERIFY(fakeFolder.currentRemoteState().find("S/B/b2m"));
    }

    void createFolderAndFiles()
    {
        FakeFolder fakeFolder {FileInfo{}};
        auto vfs = setupVfs(fakeFolder);

        fakeFolder.remoteModifier().mkdir("first folder");

        QVERIFY(fakeFolder.syncOnce());

        fakeFolder.remoteModifier().insert("first folder/file1");
        fakeFolder.remoteModifier().insert("first folder/file2");
        fakeFolder.remoteModifier().insert("first folder/file3");
        fakeFolder.remoteModifier().mkdir("first folder/second folder");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file1");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file2");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file3");

        QVERIFY(fakeFolder.syncOnce());
        QEXPECT_FAIL("", "windows VFS breaks comparison using currentLocalState()", Abort);
        QCOMPARE(fakeFolder.currentRemoteState(), fakeFolder.currentLocalState());
    }

    void testSyncFolderNewDeleteConflictExpectDeletion()
    {
        QSKIP("folders on-demand breaks existing tests");

        FakeFolder fakeFolder{FileInfo{}};
        setupVfs(fakeFolder);

        fakeFolder.remoteModifier().mkdir("directory");
        fakeFolder.remoteModifier().mkdir("directory/subdir");
        fakeFolder.remoteModifier().insert("directory/file1");
        fakeFolder.remoteModifier().insert("directory/file2");
        fakeFolder.remoteModifier().insert("directory/file3");
        fakeFolder.remoteModifier().insert("directory/subdir/fileTxt1.txt");
        fakeFolder.remoteModifier().insert("directory/subdir/fileTxt2.txt");
        fakeFolder.remoteModifier().insert("directory/subdir/fileTxt3.txt");

        // perform an initial sync to ensure local and remote have the same state
        QVERIFY(fakeFolder.syncOnce());

        fakeFolder.remoteModifier().remove("directory");
        fakeFolder.localModifier().mkdir("directory/subFolder");
        fakeFolder.localModifier().insert("directory/file4");
        fakeFolder.localModifier().insert("directory/subdir/fileTxt4.txt");

        QVERIFY(!fakeFolder.syncOnce());
        QVERIFY(fakeFolder.syncOnce());
        const auto directoryItem = fakeFolder.remoteModifier().find("directory");
        QCOMPARE(directoryItem, nullptr);
    }

    void syncFoldersOnDemand()
    {
        FakeFolder fakeFolder {FileInfo{}};
        auto vfs = setupVfs(fakeFolder);

        ItemCompletedSpy completeSpy(fakeFolder);

        const auto cleanup = [&]() {
            completeSpy.clear();
        };

        cleanup();

        fakeFolder.remoteModifier().insert("rootfile1");
        fakeFolder.remoteModifier().mkdir("first folder");
        fakeFolder.remoteModifier().insert("first folder/file1");
        fakeFolder.remoteModifier().insert("first folder/file2");
        fakeFolder.remoteModifier().insert("first folder/file3");
        fakeFolder.remoteModifier().mkdir("first folder/second folder");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file1");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file2");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file3");

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(completeSpy.size(), 2);
        QVERIFY(itemInstruction(completeSpy, "rootfile1", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "first folder", CSYNC_INSTRUCTION_NEW));

        cleanup();

        OCC::showInFileManager(fakeFolder.localPath() + "first folder");

        QTest::qWait(5000);

        QVERIFY(fakeFolder.syncOnce());

        OCC::showInFileManager(fakeFolder.localPath() + "first folder");

        QTest::qWait(5000);

        const auto file3Info = fakeFolder.localModifier().find("first folder/file3");
        QVERIFY(file3Info.exists());
        const auto secondFolderInfo = fakeFolder.localModifier().find("first folder/second folder");
        QVERIFY(secondFolderInfo.exists());
        const auto wrongFirstFolderInfo = fakeFolder.localModifier().find("first folder/first folder");
        QVERIFY(!wrongFirstFolderInfo.exists());

        QVERIFY(fakeFolder.syncOnce());

        OCC::showInFileManager(fakeFolder.localPath() + "first folder/second folder");

        QTest::qWait(5000);

        const auto secondFile3Info = fakeFolder.localModifier().find("first folder/second folder/second file3");
        QVERIFY(secondFile3Info.exists());
        const auto wrongSecondFolderInfo = fakeFolder.localModifier().find("first folder/second folder/second folder");
        QVERIFY(!wrongSecondFolderInfo.exists());

        QVERIFY(fakeFolder.syncOnce());
    }

    void syncFoldersOnDemandFromSubFolder()
    {
        FileInfo localRoot{u"first folder"_s, {}};
        FileInfo remoteRoot{{}, {localRoot}};
        FakeFolder fakeFolder {remoteRoot, localRoot, u"/first folder"_s};
        auto vfs = setupVfs(fakeFolder);

        ItemCompletedSpy completeSpy(fakeFolder);

        const auto cleanup = [&]() {
            completeSpy.clear();
        };

        cleanup();

        fakeFolder.remoteModifier().insert("rootfile1");
        fakeFolder.remoteModifier().insert("first folder/file1");
        fakeFolder.remoteModifier().insert("first folder/file2");
        fakeFolder.remoteModifier().insert("first folder/file3");
        fakeFolder.remoteModifier().mkdir("first folder/second folder");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file1");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file2");
        fakeFolder.remoteModifier().insert("first folder/second folder/second file3");
        fakeFolder.remoteModifier().mkdir("first folder/second folder/third folder");
        fakeFolder.remoteModifier().insert("first folder/second folder/third folder/third file1");
        fakeFolder.remoteModifier().insert("first folder/second folder/third folder/third file2");
        fakeFolder.remoteModifier().insert("first folder/second folder/third folder/third file3");

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(completeSpy.size(), 4);
        QVERIFY(itemInstruction(completeSpy, "file1", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "file2", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "file3", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "second folder", CSYNC_INSTRUCTION_NEW));

        cleanup();

        OCC::showInFileManager(fakeFolder.localPath() + "second folder");

        QTest::qWait(5000);

        QVERIFY(fakeFolder.syncOnce());

        OCC::showInFileManager(fakeFolder.localPath() + "second folder");

        QTest::qWait(5000);

        const auto file3Info = fakeFolder.localModifier().find("second folder/second file3");
        QVERIFY(file3Info.exists());
        const auto secondFolderInfo = fakeFolder.localModifier().find("second folder/third folder");
        QVERIFY(secondFolderInfo.exists());
        const auto wrongFirstFolderInfo = fakeFolder.localModifier().find("second folder/second folder");
        QVERIFY(!wrongFirstFolderInfo.exists());

        QVERIFY(fakeFolder.syncOnce());

        OCC::showInFileManager(fakeFolder.localPath() + "second folder/third folder");

        QTest::qWait(5000);

        const auto secondFile3Info = fakeFolder.localModifier().find("second folder/third folder/third file3");
        QVERIFY(secondFile3Info.exists());
        const auto wrongSecondFolderInfo = fakeFolder.localModifier().find("second folder/third folder/third folder");
        QVERIFY(!wrongSecondFolderInfo.exists());

        QVERIFY(fakeFolder.syncOnce());
    }

    void switchVfsOffWithOnDemandFolder()
    {
        FakeFolder fakeFolder{FileInfo{}};
        setupVfs(fakeFolder);

        ItemCompletedSpy completeSpy(fakeFolder);

        fakeFolder.remoteModifier().insert("firstFile1.txt");
        fakeFolder.remoteModifier().insert("firstFile2.txt");
        fakeFolder.remoteModifier().insert("firstFile3.txt");
        fakeFolder.remoteModifier().mkdir("directory");
        fakeFolder.remoteModifier().mkdir("directory/subdir");
        fakeFolder.remoteModifier().insert("directory/file1");
        fakeFolder.remoteModifier().insert("directory/file2");
        fakeFolder.remoteModifier().insert("directory/file3");
        fakeFolder.remoteModifier().insert("directory/subdir/fileTxt1.txt");
        fakeFolder.remoteModifier().insert("directory/subdir/fileTxt2.txt");
        fakeFolder.remoteModifier().insert("directory/subdir/fileTxt3.txt");

        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(completeSpy.size(), 4);
        QVERIFY(itemInstruction(completeSpy, "directory", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "firstFile1.txt", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "firstFile2.txt", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "firstFile3.txt", CSYNC_INSTRUCTION_NEW));
        completeSpy.clear();

        SyncEngine::wipeVirtualFiles(fakeFolder.localPath(), fakeFolder.syncJournal(), *fakeFolder.syncEngine().syncOptions()._vfs);

        fakeFolder.syncEngine().syncOptions()._vfs->stop();
        fakeFolder.syncEngine().syncOptions()._vfs->unregisterFolder();

        auto noVfsPlugin = QSharedPointer<Vfs>(createVfsFromPlugin(Vfs::Off).release());
        QObject::connect(&fakeFolder.syncEngine().syncFileStatusTracker(), &SyncFileStatusTracker::fileStatusChanged,
                         noVfsPlugin.data(), &Vfs::fileStatusChanged);
        fakeFolder.switchToVfs(noVfsPlugin);

        ::setPinState(fakeFolder.localPath(), PinState::Unspecified, cfapi::NoRecurse);

        fakeFolder.syncJournal().setSelectiveSyncList(SyncJournalDb::SelectiveSyncBlackList, {});

        fakeFolder.syncEngine().setLocalDiscoveryOptions(LocalDiscoveryStyle::FilesystemOnly);
        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(completeSpy.size(), 11);
        QVERIFY(itemInstruction(completeSpy, "directory", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "firstFile1.txt", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "firstFile2.txt", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "firstFile3.txt", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "directory/subdir", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "directory/file1", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "directory/file2", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "directory/file3", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "directory/subdir/fileTxt1.txt", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "directory/subdir/fileTxt2.txt", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "directory/subdir/fileTxt3.txt", CSYNC_INSTRUCTION_NEW));
        completeSpy.clear();

        fakeFolder.syncEngine().setLocalDiscoveryOptions(LocalDiscoveryStyle::FilesystemOnly);
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(completeSpy.size(), 0);
    }

    void moveItemsFromClientShouldBeMoveOnServer()
    {
        FakeFolder fakeFolder{FileInfo{}};
        setupVfs(fakeFolder);

        ItemCompletedSpy completeSpy(fakeFolder);
        const auto cleanup = [&]() {
            completeSpy.clear();
        };

        fakeFolder.remoteModifier().mkdir("zdirectory");
        fakeFolder.remoteModifier().mkdir("zdirectory/zsubdir");
        fakeFolder.remoteModifier().insert("fileFromRoot.txt");
        fakeFolder.remoteModifier().insert("zdirectory/afileFromDirectory.txt");
        fakeFolder.remoteModifier().insert("zdirectory/zsubdir/afileFromSubdir.txt");

        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(completeSpy.size(), 2);
        QVERIFY(itemInstruction(completeSpy, "zdirectory", CSYNC_INSTRUCTION_NEW));
        QVERIFY(itemInstruction(completeSpy, "fileFromRoot.txt", CSYNC_INSTRUCTION_NEW));
        cleanup();

        OCC::showInFileManager(fakeFolder.localPath() + "zdirectory");

        QTest::qWait(5000);

        OCC::showInFileManager(fakeFolder.localPath() + "zdirectory");

        QTest::qWait(5000);

        OCC::showInFileManager(fakeFolder.localPath() + "zdirectory/zsubdir");

        QTest::qWait(5000);

        const auto afileFromDirectoryInfo = fakeFolder.localModifier().find("zdirectory/afileFromDirectory.txt");
        QVERIFY(afileFromDirectoryInfo.exists());
        const auto zsubdirInfo = fakeFolder.localModifier().find("zdirectory/zsubdir");
        QVERIFY(zsubdirInfo.exists());
        const auto afileFromSubdirInfo = fakeFolder.localModifier().find("zdirectory/zsubdir/afileFromSubdir.txt");
        QVERIFY(afileFromSubdirInfo.exists());

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(completeSpy.size(), 0);
        cleanup();

        fakeFolder.localModifier().rename("fileFromRoot.txt", "zdirectory/zsubdir/fileFromRoot.txt");
        fakeFolder.localModifier().rename("zdirectory/afileFromDirectory.txt", "afileFromDirectory.txt");
        fakeFolder.localModifier().rename("zdirectory/zsubdir/afileFromSubdir.txt", "afileFromSubdir.txt");

        QVERIFY(fakeFolder.syncOnce());

        QCOMPARE(completeSpy.size(), 3);

        QVERIFY(itemInstruction(completeSpy, "zdirectory/zsubdir/fileFromRoot.txt", CSYNC_INSTRUCTION_RENAME));
        QVERIFY(itemInstruction(completeSpy, "afileFromDirectory.txt", CSYNC_INSTRUCTION_RENAME));
        QVERIFY(itemInstruction(completeSpy, "afileFromSubdir.txt", CSYNC_INSTRUCTION_RENAME));
    }


    void testServer_caseClash_createConflict()
    {
        FakeFolder fakeFolder{ FileInfo{} };
        setupVfs(fakeFolder);

        ItemCompletedSpy completeSpy(fakeFolder);

        const auto cleanup = [&]() {
            completeSpy.clear();
        };

        cleanup();

        fakeFolder.remoteModifier().mkdir("perso");
        fakeFolder.remoteModifier().mkdir("perso/hello");
        fakeFolder.remoteModifier().mkdir("perso/Hello");

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(completeSpy.size(), 1);
        QVERIFY(itemInstruction(completeSpy, "perso", CSYNC_INSTRUCTION_NEW));

        cleanup();

        OCC::showInFileManager(fakeFolder.localPath() + "perso");

        QTest::qWait(5000);

        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(completeSpy.size(), 0);

        OCC::showInFileManager(fakeFolder.localPath() + "perso");

        QTest::qWait(5000);

        cleanup();
        fakeFolder.syncOnce();
        QCOMPARE(completeSpy.size(), 0);

        cleanup();
        QVERIFY(fakeFolder.syncOnce());
        QCOMPARE(completeSpy.size(), 0);
    }
};

QTEST_GUILESS_MAIN(TestSyncCfApi)
#include "testsynccfapi.moc"
