Unit tests for raster contrast enhancements

git-svn-id: http://svn.osgeo.org/qgis/trunk@9230 c8812cc2-4d05-0410-92ff-de0c093fc19c

tests/src/core/CMakeLists.txt

@@ -191,6 +191,27 @@ ELSE (APPLE)
   INSTALL(TARGETS qgis_rasterlayertest RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
 ENDIF (APPLE)
 #
+# Contrast Enhancements Test
+#
+SET(qgis_contrastenhancementtest_SRCS testcontrastenhancements.cpp)
+SET(qgis_contrastenhancementtest_MOC_CPPS testcontrastenhancements.cpp)
+QT4_WRAP_CPP(qgis_contrastenhancementtest_MOC_SRCS ${qgis_contrastenhancementtest_MOC_CPPS})
+ADD_CUSTOM_TARGET(qgis_contrastenhancementtestmoc ALL DEPENDS ${qgis_contrastenhancementtest_MOC_SRCS})
+ADD_EXECUTABLE(qgis_contrastenhancementtest ${qgis_contrastenhancementtest_SRCS})
+ADD_DEPENDENCIES(qgis_contrastenhancementtest qgis_contrastenhancementtestmoc)
+TARGET_LINK_LIBRARIES(qgis_contrastenhancementtest ${QT_LIBRARIES} qgis_core)
+SET_TARGET_PROPERTIES(qgis_contrastenhancementtest
+  PROPERTIES INSTALL_RPATH ${QGIS_LIB_DIR}
+  INSTALL_RPATH_USE_LINK_PATH true)
+IF (APPLE)
+  # For Mac OS X, the executable must be at the root of the bundle's executable folder
+  ADD_TEST(qgis_contrastenhancementtest ${CMAKE_INSTALL_PREFIX}/qgis_contrastenhancementtest)
+  INSTALL(TARGETS qgis_contrastenhancementtest RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX})
+ELSE (APPLE)
+  ADD_TEST(qgis_contrastenhancementtest ${CMAKE_INSTALL_PREFIX}/bin/qgis_contrastenhancementtest)
+  INSTALL(TARGETS qgis_contrastenhancementtest RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
+ENDIF (APPLE)
+#
 # QgsMapLayer test
 #
 SET(qgis_maplayertest_SRCS testqgsmaplayer.cpp ${util_SRCS})

tests/src/core/testcontrastenhancements.cpp

@@ -0,0 +1,83 @@
+/***************************************************************************
+     testcontrastenhancements.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 <QApplication>
+#include <QDesktopServices>
+
+
+//qgis includes...
+#include <qgsrasterlayer.h>
+#include <qgscliptominmaxenhancement.h>
+#include <qgscontrastenhancement.h>
+#include <qgslinearminmaxenhancement.h>
+
+/** \ingroup UnitTests
+ * This is a unit test for the ContrastEnhancements contrast enhancement classes.
+ */
+class TestContrastEnhancements: 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 minMaxEnhancementTest();
+    void linearMinMaxEnhancementTest();
+  private:
+    QString mReport;
+};
+
+//runs before all tests
+void TestContrastEnhancements::initTestCase()
+{
+  mReport += "<h1>Raster Contrast Enhancement Tests</h1>\n";
+}
+//runs after all tests
+void TestContrastEnhancements::cleanupTestCase()
+{
+  QString myReportFile = QDir::tempPath() + QDir::separator() + "contrastenhancementest.html";
+  QFile myFile( myReportFile );
+  if ( myFile.open( QIODevice::WriteOnly ) )
+  {
+    QTextStream myQTextStream( &myFile );
+    myQTextStream << mReport;
+    myFile.close();
+    QDesktopServices::openUrl( "file://" + myReportFile );
+  }
+
+}
+
+
+void TestContrastEnhancements::minMaxEnhancementTest()
+{
+  QgsClipToMinMaxEnhancement myEnhancement(QgsContrastEnhancement::QGS_Byte, 10.0, 240.0);
+  QVERIFY(!myEnhancement.isValueInDisplayableRange(0.0));
+  QVERIFY(10.0 == myEnhancement.enhanceValue(0.0)) ; 
+  QVERIFY(250.0 == myEnhancement.enhanceValue(240.0)) ; 
+}
+void TestContrastEnhancements::linearMinMaxEnhancementTest()
+{
+  QgsLinearMinMaxEnhancement myEnhancement(QgsContrastEnhancement::QGS_Byte, 10.0, 240.0);
+  //0 should be scaled to 10 and not clipped
+  QVERIFY(myEnhancement.isValueInDisplayableRange(0.0));
+  QVERIFY(10.0 == myEnhancement.enhanceValue(0.0)) ; 
+  QVERIFY(250.0 == myEnhancement.enhanceValue(240.0)) ; 
+}
+QTEST_MAIN( TestContrastEnhancements )
+#include "moc_testcontrastenhancements.cxx"
+