testqgsrasterlayer.cpp

/***************************************************************************
     testqgsvectorfilewriter.cpp
     --------------------------------------
    Date                 : Frida  Nov 23  2007
    Copyright            : (C) 2007 by Tim Sutton
    Email                : tim@linfiniti.com
 ***************************************************************************
 *                                                                         *
 *   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>
#include <QObject>
#include <QString>
#include <QStringList>
#include <QObject>
#include <iostream>
#include <QApplication>
#include <QFileInfo>
#include <QDir>
#include <QPainter>
#include <QSettings>
#include <QTime>
#include <QDesktopServices>


//qgis includes...
#include <qgsrasterlayer.h>
#include <qgsrasterpyramid.h>
#include <qgsrasterbandstats.h>
#include <qgsmaplayerregistry.h>
#include <qgsapplication.h>
#include <qgsmaprenderer.h>
#include <qgsmaplayerregistry.h>

//qgis unit test includes
#include <qgsrenderchecker.h>


/** \ingroup UnitTests
 * This is a unit test for the QgsRasterLayer class.
 */
class TestQgsRasterLayer: public QObject
{
    Q_OBJECT;
  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 isValid();
    void pseudoColor();
    void landsatBasic();
    void landsatBasic875Qml();
    void checkDimensions();
    void buildExternalOverviews();
    void registry();
  private:
    bool render( QString theFileName );
    bool setQml( QString theType );
    QString mTestDataDir;
    QgsRasterLayer * mpRasterLayer;
    QgsRasterLayer * mpLandsatRasterLayer;
    QgsMapRenderer * mpMapRenderer;
    QString mReport;
};

//runs before all tests
void TestQgsRasterLayer::initTestCase()
{
  // init QGIS's paths - true means that all path will be inited from prefix
  QString qgisPath = QCoreApplication::applicationDirPath();
  QgsApplication::setPrefixPath( INSTALL_PREFIX, true );
  QgsApplication::showSettings();
  //create some objects that will be used in all tests...
  //create a raster layer that will be used in all tests...
  mTestDataDir = QString( TEST_DATA_DIR ) + QDir::separator(); //defined in CmakeLists.txt
  QString myFileName = mTestDataDir + "tenbytenraster.asc";
  QString myLandsatFileName = mTestDataDir + "landsat.tif";
  QFileInfo myRasterFileInfo( myFileName );
  mpRasterLayer = new QgsRasterLayer( myRasterFileInfo.filePath(),
                                      myRasterFileInfo.completeBaseName() );
  QFileInfo myLandsatRasterFileInfo( myLandsatFileName );
  mpLandsatRasterLayer = new QgsRasterLayer( myLandsatRasterFileInfo.filePath(),
      myLandsatRasterFileInfo.completeBaseName() );
  // Register the layer with the registry
  QgsMapLayerRegistry::instance()->addMapLayer( mpRasterLayer );
  QgsMapLayerRegistry::instance()->addMapLayer( mpLandsatRasterLayer );
  // add the test layer to the maprender
  mpMapRenderer = new QgsMapRenderer();
  QStringList myLayers;
  myLayers << mpRasterLayer->getLayerID();
  mpMapRenderer->setLayerSet( myLayers );
  mReport += "<h1>Raster Layer Tests</h1>\n";
}
//runs after all tests
void TestQgsRasterLayer::cleanupTestCase()
{
  QString myReportFile = QDir::tempPath() + QDir::separator() + "rastertest.html";
  QFile myFile( myReportFile );
  if ( myFile.open( QIODevice::WriteOnly ) )
  {
    QTextStream myQTextStream( &myFile );
    myQTextStream << mReport;
    myFile.close();
    QDesktopServices::openUrl( "file://" + myReportFile );
  }

}

void TestQgsRasterLayer::isValid()
{
  QVERIFY( mpRasterLayer->isValid() );
  mpMapRenderer->setExtent( mpRasterLayer->extent() );
  QVERIFY( render( "raster" ) );
}

void TestQgsRasterLayer::pseudoColor()
{
  mpRasterLayer->setDrawingStyle( QgsRasterLayer::SingleBandPseudoColor );
  mpRasterLayer->setColorShadingAlgorithm( QgsRasterLayer::PseudoColorShader );
  mpRasterLayer->setContrastEnhancementAlgorithm(
    QgsContrastEnhancement::StretchToMinimumMaximum, false );
  mpRasterLayer->setMinimumValue( mpRasterLayer->grayBandName(), 0.0, false );
  mpRasterLayer->setMaximumValue( mpRasterLayer->grayBandName(), 10.0 );
  mpMapRenderer->setExtent( mpRasterLayer->extent() );
  QVERIFY( render( "raster_pseudo" ) );
}

void TestQgsRasterLayer::landsatBasic()
{
  QStringList myLayers;
  myLayers << mpLandsatRasterLayer->getLayerID();
  mpMapRenderer->setLayerSet( myLayers );
  mpMapRenderer->setExtent( mpLandsatRasterLayer->extent() );
  QVERIFY( render( "landsat_basic" ) );
}
void TestQgsRasterLayer::landsatBasic875Qml()
{
  //a qml that orders the rgb bands as 8,7,5
  QStringList myLayers;
  myLayers << mpLandsatRasterLayer->getLayerID();
  mpMapRenderer->setLayerSet( myLayers );
  mpMapRenderer->setExtent( mpLandsatRasterLayer->extent() );
  QVERIFY( setQml( "875" ) );
  QVERIFY( render( "landsat_875" ) );
}
void TestQgsRasterLayer::checkDimensions()
{
  QVERIFY( mpRasterLayer->width() == 10 );
  QVERIFY( mpRasterLayer->height() == 10 );
  // regression check for ticket #832
  // note bandStatistics call is base 1
  QVERIFY( mpRasterLayer->bandStatistics( 1 ).elementCount == 100 );
}

void TestQgsRasterLayer::buildExternalOverviews()
{
  //before we begin delete any old ovr file (if it exists)
  //and make a copy of the landsat raster into the temp dir

  QString myTempPath = QDir::tempPath() + QDir::separator();
  QFile::remove( myTempPath + "landsat.tif.ovr" );
  QFile::copy( mTestDataDir + "landsat.tif", myTempPath + "landsat.tif" );
  QFileInfo myRasterFileInfo( myTempPath + "landsat.tif" );
  QgsRasterLayer * mypLayer = new QgsRasterLayer( myRasterFileInfo.filePath(),
      myRasterFileInfo.completeBaseName() );


  //
  // Ok now we can go on to test
  //

  bool myInternalFlag = false;
  QgsRasterLayer::RasterPyramidList myPyramidList = mypLayer->buildPyramidList();
  for ( int myCounterInt = 0; myCounterInt < myPyramidList.count(); myCounterInt++ )
  {
    //mark to be pyramided
    myPyramidList[myCounterInt].build = true;
  }
  //now actually make the pyramids
  QString myResult = mypLayer->buildPyramids(
                       myPyramidList,
                       "NEAREST",
                       myInternalFlag
                     );
  qDebug( "%s", myResult.toLocal8Bit().constData() );
  //
  // Lets verify we have pyramids now...
  //
  myPyramidList = mypLayer->buildPyramidList();
  for ( int myCounterInt = 0; myCounterInt < myPyramidList.count(); myCounterInt++ )
  {
    //mark to be pyramided
    QVERIFY( myPyramidList.at( myCounterInt ).exists );
  }

  //
  // And that they were indeed in an external file...
  //
  QVERIFY( QFile::exists( myTempPath + "landsat.tif.ovr" ) );
  //cleanup
  delete mypLayer;
}


void TestQgsRasterLayer::registry()
{
  QString myTempPath = QDir::tempPath() + QDir::separator();
  QFile::remove( myTempPath + "landsat.tif.ovr" );
  QFile::copy( mTestDataDir + "landsat.tif", myTempPath + "landsat.tif" );
  QFileInfo myRasterFileInfo( myTempPath + "landsat.tif" );
  QgsRasterLayer * mypLayer = new QgsRasterLayer( myRasterFileInfo.filePath(),
      myRasterFileInfo.completeBaseName() );

  QgsMapLayerRegistry::instance()->addMapLayer(mypLayer,false);
  QgsMapLayerRegistry::instance()->removeMapLayer(mypLayer->getLayerID());
  //cleanup
  delete mypLayer;
}

//
// Helper methods
//


bool TestQgsRasterLayer::render( QString theTestType )
{
  mReport += "<h2>" + theTestType + "</h2>\n";
  QString myDataDir( TEST_DATA_DIR ); //defined in CmakeLists.txt
  QString myTestDataDir = myDataDir + QDir::separator();
  QgsRenderChecker myChecker;
  myChecker.setExpectedImage( myTestDataDir + "expected_" + theTestType + ".png" );
  myChecker.setMapRenderer( mpMapRenderer );
  bool myResultFlag = myChecker.runTest( theTestType );
  mReport += "\n\n\n" + myChecker.report();
  return myResultFlag;
}

bool TestQgsRasterLayer::setQml( QString theType )
{
  //load a qml style and apply to our layer
  // huh? this is failing but shouldnt!
  //if (! mpLandsatRasterLayer->isValid() )
  //{
  //  qDebug(" **** setQml -> mpLandsatRasterLayer is invalid");
  //  return false;
  //}
  QString myFileName = mTestDataDir + "landsat_" + theType + ".qml";
  bool myStyleFlag = false;
  mpLandsatRasterLayer->loadNamedStyle( myFileName, myStyleFlag );
  if ( !myStyleFlag )
  {
    qDebug( " **** setQml -> mpLandsatRasterLayer is invalid" );
    qDebug( "Qml File :%s", myFileName.toLocal8Bit().constData() );
  }
  return myStyleFlag;
}

QTEST_MAIN( TestQgsRasterLayer )
#include "moc_testqgsrasterlayer.cxx"