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Test of QgsDistanceArea + functionality addition
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| /*************************************************************************** | ||
| testqgsdistancearea.cpp | ||
| -------------------------------------- | ||
| Date : Tue 14 Aug 2012 | ||
| Copyright : (C) 2012 by Magnus Homann | ||
| Email : magnus at homann dot se | ||
| *************************************************************************** | ||
| * * | ||
| * 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 <QFile> | ||
| #include <QTextStream> | ||
| #include <QObject> | ||
| #include <QString> | ||
| #include <QStringList> | ||
| #include <qgsapplication.h> | ||
| //header for class being tested | ||
| #include <qgsdistancearea.h> | ||
| #include <qgspoint.h> | ||
| #include "qgslogger.h" | ||
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| class TestQgsDistanceArea: public QObject | ||
| { | ||
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| Q_OBJECT; | ||
| private slots: | ||
| void initTestCase(); | ||
| void basic(); | ||
| void test_distances(); | ||
| void unit_conversions(); | ||
| }; | ||
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| void TestQgsDistanceArea::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(); | ||
| } | ||
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| void TestQgsDistanceArea::basic() | ||
| { | ||
| QgsPoint p1( 1.0, 3.0 ), p2( -2.0, -1.0 ); | ||
| QgsDistanceArea daA; | ||
| double resultA, resultB, resultC; | ||
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| daA.setEllipsoid( "NONE" ); | ||
| resultA = daA.measureLine( p1, p2 ); | ||
| QCOMPARE( resultA, 5.0 ); | ||
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| // Now, on an ellipsoid. Always less? | ||
| daA.setSourceCrs( 3006 ); | ||
| daA.setEllipsoid( "WGS84" ); | ||
| daA.setEllipsoidalMode( true ); | ||
| resultA = daA.measureLine( p1, p2 ); | ||
| QVERIFY( resultA < 5.0 ); | ||
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| // Test copy constructor | ||
| QgsDistanceArea daB( daA ); | ||
| resultB = daB.measureLine( p1, p2 ); | ||
| QCOMPARE( resultA, resultB ); | ||
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| // Different Ellipsoid | ||
| daB.setEllipsoid( "WGS72" ); | ||
| resultB = daB.measureLine( p1, p2 ); | ||
| QVERIFY( ! qFuzzyCompare( resultA, resultB ) ); | ||
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| // Test assignment | ||
| QgsDistanceArea * daC; | ||
| daC = new QgsDistanceArea; | ||
| *daC = daB; | ||
| resultC = daC->measureLine( p1, p2 ); | ||
| QCOMPARE( resultB, resultC ); | ||
| delete daC; | ||
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| // Use parameter setting of ellipsoid radii (from WGS72 ) | ||
| daA.setEllipsoid( 6378135.0, 6378135.0 - ( 6378135.0 / 298.26 ) ); | ||
| resultA = daA.measureLine( p1, p2 ); | ||
| QCOMPARE( resultA, resultB ); | ||
| }; | ||
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| void TestQgsDistanceArea::test_distances() | ||
| { | ||
| // Read the file of Geod data | ||
| // Column 0 (first) is latitude point 1 | ||
| // Column 1 is longitude point 1 | ||
| // Column 3 is latitude point 2 | ||
| // Column 4 is longitude point 3 | ||
| // Column 6 is the resulting distance in meters on the WGS84 ellipsoid | ||
| // Note: lat is north/south, so the QgsPoint should be ( long, lat ) | ||
| // See http://geographiclib.sourceforge.net/html/geodesic.html#testgeod | ||
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| // Set up DA | ||
| QgsDistanceArea myDa; | ||
| myDa.setSourceAuthId( "EPSG:4030" ); | ||
| myDa.setEllipsoidalMode( true ); | ||
| myDa.setEllipsoid( "WGS84" ); | ||
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| QString myFileName = QString( TEST_DATA_DIR ) + QDir::separator() + "GeodTest-nano.dat"; | ||
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| QFile myFile( myFileName ); | ||
| if ( ! myFile.open( QIODevice::ReadOnly | QIODevice::Text ) ) | ||
| { | ||
| QFAIL( "Couldn't open file" ); | ||
| return; | ||
| } | ||
| QTextStream in( & myFile ); | ||
| while ( !in.atEnd() ) | ||
| { | ||
| QString line = in.readLine(); | ||
| // Some test points (antipodal) does not converge with the chosen algorithm! | ||
| // See calcaulator at http://www.movable-type.co.uk/scripts/latlong-vincenty.html | ||
| // These are commented out. | ||
| if ( line[0] != '#' ) | ||
| { | ||
| QStringList myLineList = line.split( ' ' ); // Split fields on space. | ||
| // Create points | ||
| QgsPoint p1( myLineList[1].toDouble(), myLineList[0].toDouble() ); | ||
| QgsPoint p2( myLineList[4].toDouble(), myLineList[3].toDouble() ); | ||
| double result = myDa.measureLine( p1, p2 ); | ||
| // QgsDebugMsg( QString( "Distance from %1 to %2 is %3" ).arg( p1.toString( 15 ) ).arg( p2.toString( 15 ) ).arg( result, 0, 'g', 15 ) ); | ||
| // QgsDebugMsg( QString( "Distance should be %1" ).arg( myLineList[6] ) ); | ||
| // Check result is less than 0.5mm from expected. | ||
| QVERIFY( qAbs( result - myLineList[6].toDouble() ) < 0.0005 ); | ||
| } | ||
| } | ||
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| }; | ||
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| void TestQgsDistanceArea::unit_conversions() | ||
| { | ||
| // Do some very simple test of conversion and units | ||
| QgsDistanceArea myDa; | ||
| myDa.setEllipsoidalMode( "NONE" ); | ||
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| double inputValue; | ||
| QGis::UnitType inputUnit; | ||
| QGis::UnitType outputUnit; | ||
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| inputValue = 10000.0; | ||
| inputUnit = QGis::Meters; | ||
| outputUnit = QGis::Feet; | ||
| //outputUnit = QGis::Meters; | ||
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| // First, convert from sq.meter to sq.feet | ||
| myDa.convertMeasurement( inputValue, inputUnit, outputUnit, true ); | ||
| QVERIFY( qAbs( inputValue - 107639.1041671 ) <= 0.0000001 ); | ||
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| // The print a text unit. This is i18n, so we should ignore the unit | ||
| // and use the locale settings for separation of digits. | ||
| QString myTxt = QgsDistanceArea::textUnit( inputValue, 7, inputUnit, true, false ); | ||
| QString expectedTxt = QLocale::system().toString( 2.4710538146717, 'g', 1 + 7 ); | ||
| QVERIFY( myTxt.startsWith( expectedTxt ) ); // Ignore units for now. | ||
| }; | ||
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| QTEST_MAIN( TestQgsDistanceArea ) | ||
| #include "moc_testqgsdistancearea.cxx" | ||
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