Add a test unit for expressions in QgsComposerLabel

tests/src/core/CMakeLists.txt

@@ -101,6 +101,7 @@ ADD_QGIS_TEST(rulebasedrenderertest testqgsrulebasedrenderer.cpp)
 ADD_QGIS_TEST(ziplayertest testziplayer.cpp)
 ADD_QGIS_TEST(dataitemtest testqgsdataitem.cpp)
 ADD_QGIS_TEST(composermaptest testqgscomposermap.cpp)
+ADD_QGIS_TEST(composerlabeltest testqgscomposerlabel.cpp)
 ADD_QGIS_TEST(stylev2test testqgsstylev2.cpp)
 #ADD_QGIS_TEST(composerhtmltest testqgscomposerhtml.cpp )
 ADD_QGIS_TEST(rectangletest testqgsrectangle.cpp)

tests/src/core/testqgscomposerlabel.cpp

@@ -0,0 +1,164 @@
+/***************************************************************************
+                         testqgscomposerlabel.cpp
+                         ----------------------
+    begin                : Sept 2012
+    copyright            : (C) 2012 by Hugo Mercier
+    email                : hugo dot mercier at oslandia 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 "qgsapplication.h"
+#include "qgscomposition.h"
+#include "qgscomposerlabel.h"
+#include "qgsmaplayerregistry.h"
+#include "qgsmaprenderer.h"
+#include "qgsvectorlayer.h"
+#include "qgsvectordataprovider.h"
+#include <QObject>
+#include <QtTest>
+
+class TestQgsComposerLabel: 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.
+  
+  // test simple expression evaluation
+  void evaluation();
+  // test expression evaluation when a feature is set
+  void feature_evaluation();
+  private:
+  QgsComposition* mComposition;
+  QgsComposerLabel* mComposerLabel;
+  QgsMapRenderer* mMapRenderer;
+  QgsVectorLayer* mVectorLayer;
+};
+
+void TestQgsComposerLabel::initTestCase()
+{
+  QgsApplication::init();
+  QgsApplication::initQgis();
+
+  //create maplayers from testdata and add to layer registry
+  QFileInfo vectorFileInfo( QString( TEST_DATA_DIR ) + QDir::separator() +  "france_parts.shp" );
+  mVectorLayer = new QgsVectorLayer( vectorFileInfo.filePath(),
+                                     vectorFileInfo.completeBaseName(),
+				     "ogr" );
+  QgsMapLayerRegistry::instance()->addMapLayers( QList<QgsMapLayer*>() << mVectorLayer );
+
+  //create composition with composer map
+  mMapRenderer = new QgsMapRenderer();
+  mMapRenderer->setLayerSet( QStringList() << mVectorLayer->id() );
+  mMapRenderer->setProjectionsEnabled( false );
+  mComposition = new QgsComposition( mMapRenderer );
+  mComposition->setPaperSize( 297, 210 ); //A4 landscape
+
+  mComposerLabel = new QgsComposerLabel( mComposition );
+  mComposition->addComposerLabel( mComposerLabel );
+}
+
+void TestQgsComposerLabel::cleanupTestCase()
+{
+  delete mComposition;
+  delete mMapRenderer;
+  delete mVectorLayer;
+}
+
+void TestQgsComposerLabel::init()
+{
+
+}
+
+void TestQgsComposerLabel::cleanup()
+{
+
+}
+
+void TestQgsComposerLabel::evaluation()
+{
+  {
+    // $CURRENT_DATE evaluation
+    QString expected = "__" + QDate::currentDate().toString() + "__";
+    mComposerLabel->setText( "__$CURRENT_DATE__" );
+    QString evaluated = mComposerLabel->displayText();
+    QCOMPARE( evaluated, expected );
+  }
+  {
+    // $CURRENT_DATE() evaluation
+    QDateTime now = QDateTime::currentDateTime();
+    QString expected = "__" + now.toString( "dd" ) + "(ok)__";
+    mComposerLabel->setText( "__$CURRENT_DATE(dd)(ok)__" );
+    QString evaluated = mComposerLabel->displayText();
+    QCOMPARE( evaluated, expected );
+  }
+  {
+    // $CURRENT_DATE() evaluation (inside an expression)
+    QDate now = QDate::currentDate();
+    int dd = now.day();
+    
+    QString expected = "__" + QString("%1").arg(dd+1, 2, 10, QChar('0')) + "(ok)__";
+    mComposerLabel->setText( "__[%$CURRENT_DATE(dd) + 1%](ok)__" );
+    QString evaluated = mComposerLabel->displayText();
+    QCOMPARE( evaluated, expected );
+  }
+  {
+    // expression evaluation (without feature)
+    QString expected = "__[NAME_1]42__";
+    mComposerLabel->setText( "__[%\"NAME_1\"%][%21*2%]__" );
+    QString evaluated = mComposerLabel->displayText();
+    QCOMPARE( evaluated, expected );
+  }
+}
+
+void TestQgsComposerLabel::feature_evaluation()
+{
+  QgsVectorDataProvider* provider = mVectorLayer->dataProvider();
+
+  QgsAttributeList allAttrs = provider->attributeIndexes();
+  provider->select( allAttrs );
+  QgsFeature feat;
+
+  provider->nextFeature( feat );
+  {
+    // evaluation with a feature
+    mComposerLabel->setExpressionContext( &feat, mVectorLayer );
+    mComposerLabel->setText( "[%\"NAME_1\"||'_ok'%]" );
+    QString evaluated = mComposerLabel->displayText();
+    QString expected = "Basse-Normandie_ok";
+    QCOMPARE( evaluated, expected );
+  }
+  provider->nextFeature( feat );
+  {
+    // evaluation with a feature
+    mComposerLabel->setExpressionContext( &feat, mVectorLayer );
+    mComposerLabel->setText( "[%\"NAME_1\"||'_ok'%]" );
+    QString evaluated = mComposerLabel->displayText();
+    QString expected = "Bretagne_ok";
+    QCOMPARE( evaluated, expected );
+  }
+  {
+    // evaluation with a feature and local variables
+    QMap<QString, QVariant> locals;
+    locals.insert( "$test", "OK" );
+
+    mComposerLabel->setExpressionContext( &feat, mVectorLayer, locals );
+    mComposerLabel->setText( "[%\"NAME_1\"||$test%]" );
+    QString evaluated = mComposerLabel->displayText();
+    QString expected = "BretagneOK";
+    QCOMPARE( evaluated, expected );
+  }
+}
+
+QTEST_MAIN( TestQgsComposerLabel )
+#include "moc_testqgscomposerlabel.cxx"

tests/testdata/france_parts.prj

@@ -0,0 +1 @@
+GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]

tests/testdata/france_parts.qpj

@@ -0,0 +1 @@
+GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]