src/analysis/vector/qgsgeometryanalyzer.cpp

@@ -149,12 +149,14 @@ bool QgsGeometryAnalyzer::centroids( QgsVectorLayer* layer, const QString& shape
 {
   if ( !layer )
   {
+    QgsDebugMsg( "No layer passed to centroids" );
     return false;
   }
 
   QgsVectorDataProvider* dp = layer->dataProvider();
   if ( !dp )
   {
+    QgsDebugMsg( "No data provider for layer passed to centroids" );
     return false;
   }
 

src/core/qgsapplication.h

@@ -34,7 +34,10 @@ class CORE_EXPORT QgsApplication: public QApplication
     virtual ~QgsApplication();
 
     /** This method initialises paths etc for QGIS. Called by the ctor or call it manually
-        when your app does not extend the QApplication class. */
+        when your app does not extend the QApplication class. 
+        @note you will probably want to call initQgis too to load the providers in 
+        the above case.
+        */
     static void init( QString customConfigPath = QString() );
 
     //! Watch for QFileOpenEvent.

tests/src/analysis/testqgsvectoranalyzer.cpp

@@ -51,28 +51,30 @@ void  TestQgsVectorAnalyzer::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::init( INSTALL_PREFIX );
+  QgsApplication::initQgis( );
   QgsApplication::showSettings();
   // Instantiate the plugin directory so that providers are loaded
   QgsProviderRegistry::instance(QgsApplication::pluginPath());
 
   //create some objects that will be used in all tests...
   //create a map layer that will be used in all tests...
-  QString myFileName (TEST_DATA_DIR); //defined in CmakeLists.txt
+  QString myBaseFileName (TEST_DATA_DIR); //defined in CmakeLists.txt
   QString myEndName = "lines.shp";
-  myFileName = myFileName + QDir::separator() + myEndName;
+  QString myFileName = myBaseFileName + QDir::separator() + myEndName;
+  qDebug() << myFileName;
   QFileInfo myLineInfo ( myFileName );
   mpLineLayer = new QgsVectorLayer ( myLineInfo.filePath(),
             myLineInfo.completeBaseName(), "ogr" );
 
   myEndName = "polys.shp";
-  myFileName = myFileName + QDir::separator() + myEndName;
+  myFileName = myBaseFileName + QDir::separator() + myEndName;
   QFileInfo myPolyInfo ( myFileName );
   mpPolyLayer = new QgsVectorLayer ( myPolyInfo.filePath(),
             myPolyInfo.completeBaseName(), "ogr" );
 
   myEndName = "points.shp";
-  myFileName = myFileName + QDir::separator() + myEndName;
+  myFileName = myBaseFileName + QDir::separator() + myEndName;
   QFileInfo myPointInfo ( myFileName );
   mpPointLayer = new QgsVectorLayer ( myPointInfo.filePath(),
             myPointInfo.completeBaseName(), "ogr" );

tests/src/core/regression992.cpp

@@ -64,7 +64,8 @@ void Regression992::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::init( INSTALL_PREFIX );
+  QgsApplication::initQgis();
   QgsApplication::showSettings();
   //create some objects that will be used in all tests...
   //create a raster layer that will be used in all tests...