Stub test for QgsMapToPixelGeometrySimplifier

See #12416

tests/src/core/CMakeLists.txt

@@ -146,6 +146,7 @@ ADD_QGIS_TEST(maplayertest testqgsmaplayer.cpp)
 ADD_QGIS_TEST(maprenderertest testqgsmaprenderer.cpp)
 ADD_QGIS_TEST(maprotationtest testqgsmaprotation.cpp)
 ADD_QGIS_TEST(mapsettingstest testqgsmapsettings.cpp)
+ADD_QGIS_TEST(maptopixelgeometrysimplifiertest testqgsmaptopixelgeometrysimplifier.cpp)
 ADD_QGIS_TEST(maptopixeltest testqgsmaptopixel.cpp)
 ADD_QGIS_TEST(markerlinessymboltest testqgsmarkerlinesymbol.cpp)
 ADD_QGIS_TEST(networkcontentfetcher testqgsnetworkcontentfetcher.cpp )

tests/src/core/testqgsmaptopixelgeometrysimplifier.cpp

@@ -0,0 +1,156 @@
+/***************************************************************************
+     testqgsmaptopixelgeometrysimplifier.cpp
+     --------------------------------------
+    Date                 : 20 Jan 2008
+    Copyright            : (C) 2016 by Sandro Santilli
+    Email                : strk @ keybit.net
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#include <QtTest/QtTest>
+#include <QObject>
+#include <QString>
+#include <QStringList>
+#include <QApplication>
+#include <QFileInfo>
+#include <QDir>
+#include <QDesktopServices>
+#include <QVector>
+#include <QPointF>
+#include <QImage>
+#include <QPainter>
+
+//qgis includes...
+#include <qgsapplication.h>
+#include <qgsgeometry.h>
+#include <qgsmaptopixelgeometrysimplifier.h>
+#if 0
+#include <qgspoint.h>
+#include "qgsgeometryutils.h"
+#include "qgspointv2.h"
+#include "qgslinestringv2.h"
+#include "qgspolygonv2.h"
+#include "qgscircularstringv2.h"
+#endif
+
+//qgs unit test utility class
+#include "qgsrenderchecker.h"
+
+/** \ingroup UnitTests
+ * This is a unit test for the QgsMapToPixelGeometrySimplifier class
+ */
+class TestQgsMapToPixelGeometrySimplifier : public QObject
+{
+    Q_OBJECT
+
+  public:
+    TestQgsMapToPixelGeometrySimplifier();
+
+  private slots:
+    void initTestCase();// will be called before the first testfunction is executed.
+    void cleanupTestCase();// will be called after the last testfunction was executed.
+    void init();// will be called before each testfunction is executed.
+    void cleanup();// will be called after every testfunction.
+
+    void testDefaultGeometry();
+    void testLine1();
+    void testIsGeneralizableByMapBoundingBox();
+    void testMismatchWKB();
+
+};
+
+TestQgsMapToPixelGeometrySimplifier::TestQgsMapToPixelGeometrySimplifier()
+{
+}
+
+void TestQgsMapToPixelGeometrySimplifier::initTestCase()
+{
+  // Runs once before any tests are run
+  // init QGIS's paths - true means that all path will be inited from prefix
+  QgsApplication::init();
+  QgsApplication::initQgis();
+  QgsApplication::showSettings();
+}
+
+
+void TestQgsMapToPixelGeometrySimplifier::cleanupTestCase()
+{
+  // Runs once after all tests are run
+  QgsApplication::exitQgis();
+}
+
+void TestQgsMapToPixelGeometrySimplifier::init()
+{
+  // will be called before every testfunction.
+}
+
+void TestQgsMapToPixelGeometrySimplifier::cleanup()
+{
+  // will be called after every testfunction.
+}
+
+void TestQgsMapToPixelGeometrySimplifier::testDefaultGeometry()
+{
+  QgsGeometry *g = new QgsGeometry();
+  int fl = QgsMapToPixelSimplifier::SimplifyGeometry;
+  bool ret = QgsMapToPixelSimplifier::simplifyGeometry( g, fl, 10.0 );
+  QVERIFY( ! ret ); // not simplifiable
+}
+
+void TestQgsMapToPixelGeometrySimplifier::testLine1()
+{
+  // NOTE: we need more than 4 vertices, or the line will not be
+  //       reduced at all by the algorithm
+  QgsGeometry *g = QgsGeometry::fromWkt( "LINESTRING(0 0,1 1,2 0,3 1,4 0,20 1,20 0,10 0,5 0)" );
+  int fl;
+  bool ret;
+  QString wkt;
+
+  fl = QgsMapToPixelSimplifier::SimplifyGeometry;
+  ret = QgsMapToPixelSimplifier::simplifyGeometry( g, fl, 10.0 );
+  QVERIFY( ret );
+  wkt = g->exportToWkt();
+  // NOTE: I don't think vertex 1,1 should be in this result,
+  //       but that's what we get now
+  QCOMPARE( wkt, QString( "LineString (0 0, 1 1, 20 1, 10 0, 5 0)" ) );
+
+  fl = QgsMapToPixelSimplifier::SimplifyEnvelope;
+  ret = QgsMapToPixelSimplifier::simplifyGeometry( g, fl, 20.0 );
+  QVERIFY( ! ret );
+
+  ret = QgsMapToPixelSimplifier::simplifyGeometry( g, fl, 30.0 );
+  QVERIFY( ret );
+  wkt = g->exportToWkt();
+  // NOTE: I don't understand this result either
+  QCOMPARE( wkt, QString( "LineString (0 0, 20 1)" ) );
+}
+
+void
+TestQgsMapToPixelGeometrySimplifier::testIsGeneralizableByMapBoundingBox()
+{
+  QgsRectangle r1( 0, 0, 10, 1 );
+  bool ret;
+
+  ret = QgsMapToPixelSimplifier::isGeneralizableByMapBoundingBox( r1, 15 );
+  QVERIFY( ret );
+
+  // NOTE: boundary case
+  ret = QgsMapToPixelSimplifier::isGeneralizableByMapBoundingBox( r1, 10 );
+  QVERIFY( ! ret );
+
+  ret = QgsMapToPixelSimplifier::isGeneralizableByMapBoundingBox( r1, 5 );
+  QVERIFY( ! ret );
+}
+
+void TestQgsMapToPixelGeometrySimplifier::testMismatchWKB()
+{
+  // TODO see http://hub.qgis.org/issues/12416
+}
+
+QTEST_MAIN( TestQgsMapToPixelGeometrySimplifier )
+#include "testqgsmaptopixelgeometrysimplifier.moc"