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testqgsreclassifyutils.cpp
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testqgsreclassifyutils.cpp
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/***************************************************************************
testqgsreclassifyutils.cpp
---------------------
begin : June 2018
copyright : (C) 2018 by Nyall Dawson
email : nyall dot dawson at gmail dot 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 "qgstest.h"
#include "qgsreclassifyutils.h"
#include "qgsrasterdataprovider.h"
#include "qgsrasterfilewriter.h"
class TestQgsReclassifyUtils: 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 reclassifyValue();
void testReclassify_data();
void testReclassify();
private:
QVector<double> reclassifyBlock( const QVector<double> &input, int nRows, int nCols,
const QVector< QgsReclassifyUtils::RasterClass > &classes,
double destNoDataValue, bool useNoDataForMissing );
};
void TestQgsReclassifyUtils::initTestCase()
{
QgsApplication::init();
QgsApplication::initQgis();
}
void TestQgsReclassifyUtils::cleanupTestCase()
{
QgsApplication::exitQgis();
}
void TestQgsReclassifyUtils::reclassifyValue()
{
// no classes
bool ok = false;
QVector< QgsReclassifyUtils::RasterClass > classes;
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 5.9, ok ), 5.9 );
QVERIFY( !ok );
// one class
classes << QgsReclassifyUtils::RasterClass( 5, 11, QgsRasterRange::IncludeMin, -99.5 );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 5.9, ok ), -99.5 );
QVERIFY( ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 15.9, ok ), 15.9 );
QVERIFY( !ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, -15.9, ok ), -15.9 );
QVERIFY( !ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 5, ok ), -99.5 );
QVERIFY( ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 11, ok ), 11.0 );
QVERIFY( !ok );
// second class
classes << QgsReclassifyUtils::RasterClass( 11, 15, QgsRasterRange::IncludeMin, -59.5 );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 5.9, ok ), -99.5 );
QVERIFY( ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 11.9, ok ), -59.5 );
QVERIFY( ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 15.9, ok ), 15.9 );
QVERIFY( !ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, -15.9, ok ), -15.9 );
QVERIFY( !ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 5, ok ), -99.5 );
QVERIFY( ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 11, ok ), -59.5 );
QVERIFY( ok );
QCOMPARE( QgsReclassifyUtils::reclassifyValue( classes, 15, ok ), 15.0 );
QVERIFY( !ok );
}
Q_DECLARE_METATYPE( QgsReclassifyUtils::RasterClass );
void TestQgsReclassifyUtils::testReclassify_data()
{
QTest::addColumn<QVector< double >>( "input" );
QTest::addColumn<int>( "nRows" );
QTest::addColumn<int>( "nCols" );
QTest::addColumn<QVector< QgsReclassifyUtils::RasterClass >>( "classes" );
QTest::addColumn<double>( "destNoDataValue" );
QTest::addColumn<bool>( "useNoDataForMissing" );
QTest::addColumn<int>( "dataType" );
QTest::addColumn<QVector< double >>( "expected" );
QTest::newRow( "no change" ) << QVector< double > { 1, 2, 3, 4, 5, 6 }
<< 3 << 2
<< QVector< QgsReclassifyUtils::RasterClass >()
<< -9999.0 << false << static_cast< int >( Qgis::Float32 )
<< QVector< double > { 1, 2, 3, 4, 5, 6 };
QTest::newRow( "one class" ) << QVector< double > { 1, 2, 3, 4, 5, 6 }
<< 3 << 2
<< ( QVector< QgsReclassifyUtils::RasterClass >()
<< QgsReclassifyUtils::RasterClass( 3, 5, QgsRasterRange::IncludeMax, 8 ) )
<< -9999.0 << false << static_cast< int >( Qgis::Float32 )
<< QVector< double > { 1, 2, 3, 8, 8, 6 };
QTest::newRow( "byte type" ) << QVector< double > { 1, 2, 3, 4, 5, 6 }
<< 3 << 2
<< ( QVector< QgsReclassifyUtils::RasterClass >()
<< QgsReclassifyUtils::RasterClass( 3, 5, QgsRasterRange::IncludeMax, 8 ) )
<< -9999.0 << false << static_cast< int >( Qgis::Byte )
<< QVector< double > { 1, 2, 3, 8, 8, 6 };
QTest::newRow( "two class" ) << QVector< double > { 1, 2, 3, 4, 5, 6 }
<< 3 << 2
<< ( QVector< QgsReclassifyUtils::RasterClass >()
<< QgsReclassifyUtils::RasterClass( 3, 5, QgsRasterRange::IncludeMax, 8 )
<< QgsReclassifyUtils::RasterClass( 1, 3, QgsRasterRange::IncludeMin, -7 ) )
<< -9999.0 << false << static_cast< int >( Qgis::Float32 )
<< QVector< double > { -7, -7, 3, 8, 8, 6 };
QTest::newRow( "with source no data" ) << QVector< double > { 1, 2, -9999, 4, 5, 6 }
<< 3 << 2
<< ( QVector< QgsReclassifyUtils::RasterClass >()
<< QgsReclassifyUtils::RasterClass( 3, 5, QgsRasterRange::IncludeMinAndMax, 8 ) )
<< -9999.0 << false << static_cast< int >( Qgis::Float32 )
<< QVector< double > { 1, 2, -9999, 8, 8, 6 };
QTest::newRow( "with dest no data" ) << QVector< double > { 1, 2, -9999, 4, 5, 6 }
<< 3 << 2
<< ( QVector< QgsReclassifyUtils::RasterClass >()
<< QgsReclassifyUtils::RasterClass( 3, 5, QgsRasterRange::IncludeMinAndMax, 8 ) )
<< -99.0 << false << static_cast< int >( Qgis::Float32 )
<< QVector< double > { 1, 2, -99, 8, 8, 6 };
QTest::newRow( "use no data for missing" ) << QVector< double > { 1, 2, -9999, 4, 5, 6 }
<< 3 << 2
<< ( QVector< QgsReclassifyUtils::RasterClass >()
<< QgsReclassifyUtils::RasterClass( 3, 5, QgsRasterRange::IncludeMinAndMax, 8 ) )
<< -9999.0 << true << static_cast< int >( Qgis::Float32 )
<< QVector< double > { -9999, -9999, -9999, 8, 8, -9999 };
}
void TestQgsReclassifyUtils::testReclassify()
{
QFETCH( QVector< double >, input );
QFETCH( int, nRows );
QFETCH( int, nCols );
QFETCH( QVector< QgsReclassifyUtils::RasterClass >, classes );
QFETCH( double, destNoDataValue );
QFETCH( bool, useNoDataForMissing );
QFETCH( int, dataType );
QFETCH( QVector< double >, expected );
QgsRectangle extent = QgsRectangle( 0, 0, nRows, nCols );
QgsCoordinateReferenceSystem crs( 3857 );
double tform[] =
{
extent.xMinimum(), extent.width() / nCols, 0.0,
extent.yMaximum(), 0.0, -extent.height() / nRows
};
// generate unique filename (need to open the file first to generate it)
QTemporaryFile tmpFile;
tmpFile.open();
tmpFile.close();
// create a GeoTIFF - this will create data provider in editable mode
QString filename = tmpFile.fileName();
std::unique_ptr< QgsRasterFileWriter > writer = qgis::make_unique< QgsRasterFileWriter >( filename );
writer->setOutputProviderKey( QStringLiteral( "gdal" ) );
writer->setOutputFormat( QStringLiteral( "GTiff" ) );
std::unique_ptr<QgsRasterDataProvider > dp( writer->createOneBandRaster( Qgis::Float32, nCols, nRows, extent, crs ) );
QVERIFY( dp->isValid() );
dp->setNoDataValue( 1, -9999 );
std::unique_ptr< QgsRasterBlock > block( dp->block( 1, extent, nCols, nRows ) );
if ( !dp->isEditable() )
{
QVERIFY( dp->setEditable( true ) );
}
int i = 0;
for ( int row = 0; row < nRows; row++ )
{
for ( int col = 0; col < nCols; col++ )
{
block->setValue( row, col, input[i++] );
}
}
QVERIFY( dp->writeBlock( block.get(), 1 ) );
QVERIFY( dp->setEditable( false ) );
// make destination raster
QTemporaryFile tmpFile2;
tmpFile2.open();
tmpFile2.close();
// create a GeoTIFF - this will create data provider in editable mode
filename = tmpFile2.fileName();
std::unique_ptr< QgsRasterDataProvider > dp2( QgsRasterDataProvider::create( QStringLiteral( "gdal" ), filename, QStringLiteral( "GTiff" ), 1, static_cast< Qgis::DataType >( dataType ), 10, 10, tform, crs ) );
QVERIFY( dp2->isValid() );
// reclassify
QgsReclassifyUtils::reclassify( classes, dp.get(), 1, extent, nCols, nRows, dp2.get(), destNoDataValue, useNoDataForMissing );
// read back in values
block.reset( dp2->block( 1, extent, nCols, nRows ) );
QVector< double > res( nCols * nRows );
i = 0;
for ( int row = 0; row < nRows; row++ )
{
for ( int col = 0; col < nCols; col++ )
{
res[i++] = block->value( row, col );
}
}
for ( int row = 0; row < nRows; row++ )
{
for ( int col = 0; col < nCols; col++ )
{
QCOMPARE( res[row * nCols + col], expected[row * nCols + col] );
}
}
}
QGSTEST_MAIN( TestQgsReclassifyUtils )
#include "testqgsreclassifyutils.moc"