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++ // Copyright (C) 2023 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ #include <QtPositioning/QGeoCoordinate>
++ #include <QtPositioning/private/qdoublevector2d_p.h>
++ #include <QtPositioning/private/qwebmercator_p.h>
++ #include <qtest.h>
++
++ QT_USE_NAMESPACE
++
++ class tst_qwebmercator : public QObject
++ {
++ Q_OBJECT
++
++ private:
++ void transformForwardAndBackward(double lat, double lon)
++ {
++ QGeoCoordinate c(lat, lon);
++ QDoubleVector2D cmap = QWebMercator().coordToMercator(c);
++ QGeoCoordinate c1 = QWebMercator().mercatorToCoord(cmap);
++ QCOMPARE(c1.latitude(), c.latitude());
++ QCOMPARE(c1.longitude(), c.longitude());
++ }
++
++ private slots:
++ void transformForwardAndBackward()
++ {
++ transformForwardAndBackward(0, 0);
++ // transformForwardAndBackward(42,180); //Will fail.
++
++ for (double lon=-180; lon<181; lon += 22/3.) {
++ for (double lat=-90; lat<91; lat += 22/3.)
++ transformForwardAndBackward(lat, lon);
++ }
++ for (double eps = 1.0; eps > 1e-12; eps /= 10.0) {
++ transformForwardAndBackward(-90 + eps, 0.0);
++ transformForwardAndBackward(90 - eps, 0.0);
++ }
++ }
++ };
++
++ QTEST_GUILESS_MAIN(tst_qwebmercator)
++ #include "tst_qwebmercator.moc"