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// Copyright (C) 2017 Ford Motor Company
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtTest/QtTest>
#include <QModelIndex>
// Helper class which can be used by tests for starting a task and
// waiting for its completion. It takes care of running an event
// loop while waiting, until finished() method is called (or the
// timeout is reached).
class WaitHelper : public QObject
{
Q_OBJECT
public:
WaitHelper() { m_promise.start(); }
~WaitHelper()
{
if (m_promise.future().isRunning())
m_promise.finish();
}
/*
Starts an event loop and waits until finish() method is called
or the timeout is reached.
*/
bool wait(int timeout = 30000)
{
if (m_promise.future().isFinished())
return true;
QFutureWatcher<void> watcher;
QSignalSpy watcherSpy(&watcher, &QFutureWatcher<void>::finished);
watcher.setFuture(m_promise.future());
return watcherSpy.wait(timeout);
}
protected:
/*
The derived classes need to call this method to stop waiting.
*/
void finish() { m_promise.finish(); }
private:
QPromise<void> m_promise;
};
namespace {
inline bool compareIndices(const QModelIndex &lhs, const QModelIndex &rhs)
{
QModelIndex left = lhs;
QModelIndex right = rhs;
while (left.row() == right.row() && left.column() == right.column() && left.isValid() && right.isValid()) {
left = left.parent();
right = right.parent();
}
if (left.isValid() || right.isValid())
return false;
return true;
}
struct WaitForDataChanged : public WaitHelper
{
WaitForDataChanged(const QAbstractItemModel *model, const QList<QModelIndex> &pending)
: WaitHelper(), m_model(model), m_pending(pending)
{
connect(m_model, &QAbstractItemModel::dataChanged, this,
[this](const QModelIndex &topLeft, const QModelIndex &bottomRight,
const QList<int> &roles) {
Q_UNUSED(roles)
checkAndRemoveRange(topLeft, bottomRight);
if (m_pending.isEmpty())
finish();
});
}
void checkAndRemoveRange(const QModelIndex &topLeft, const QModelIndex &bottomRight)
{
QVERIFY(topLeft.parent() == bottomRight.parent());
const auto isInRange = [topLeft, bottomRight] (const QModelIndex &pending) noexcept -> bool {
if (pending.isValid() && compareIndices(pending.parent(), topLeft.parent())) {
const bool fitLeft = topLeft.column() <= pending.column();
const bool fitRight = bottomRight.column() >= pending.column();
const bool fitTop = topLeft.row() <= pending.row();
const bool fitBottom = bottomRight.row() >= pending.row();
if (fitLeft && fitRight && fitTop && fitBottom)
return true;
}
return false;
};
m_pending.erase(std::remove_if(m_pending.begin(), m_pending.end(), isInRange),
m_pending.end());
}
private:
const QAbstractItemModel *m_model = nullptr;
QList<QModelIndex> m_pending;
};
} // namespace
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