165 changes: 109 additions & 56 deletions tests/src/core/testqgsrulebasedrenderer.cpp
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//header for class being tested
#include <qgsrulebasedrendererv2.h>

#include <qgsapplication.h>
#include <qgssymbolv2.h>
#include <qgsvectorlayer.h>

#if QT_VERSION < 0x40701
// See http://hub.qgis.org/issues/4284
Q_DECLARE_METATYPE( QVariant )
#endif

typedef QgsRuleBasedRendererV2::Rule RRule;

class TestQgsRuleBasedRenderer: public QObject
{
Q_OBJECT
private slots:

void test_load_xml()
{
QDomDocument doc;
xml2domElement( "rulebasedrenderer_simple.xml", doc );
QDomElement elem = doc.documentElement();

QgsRuleBasedRendererV2* r = static_cast<QgsRuleBasedRendererV2*>( QgsRuleBasedRendererV2::create( elem ) );
QVERIFY( r );
check_tree_valid( r->rootRule() );
delete r;
}

void test_load_invalid_xml()
{
QDomDocument doc;
xml2domElement( "rulebasedrenderer_invalid.xml", doc );
QDomElement elem = doc.documentElement();

QgsRuleBasedRendererV2* r = static_cast<QgsRuleBasedRendererV2*>( QgsRuleBasedRendererV2::create( elem ) );
QVERIFY( r == NULL );
}

private:
void xml2domElement( QString testFile, QDomDocument& doc )
{
QString fileName = QString( TEST_DATA_DIR ) + QDir::separator() + testFile;
QFile f(fileName);
bool fileOpen = f.open(QIODevice::ReadOnly);
QVERIFY( fileOpen );

QString msg;
int line, col;
bool parse = doc.setContent( &f, &msg, &line, &col );
QVERIFY( parse );
}

void check_tree_valid( QgsRuleBasedRendererV2::Rule* root )
{
// root must always exist (although it does not have children)
QVERIFY( root );
// and does not have a parent
QVERIFY( root->parent() == NULL );

foreach ( QgsRuleBasedRendererV2::Rule* node, root->children() )
void initTestCase()
{
// we need memory provider, so make sure to load providers
QgsApplication::init();
QgsApplication::initQgis();
}

void test_load_xml()
{
QDomDocument doc;
xml2domElement( "rulebasedrenderer_simple.xml", doc );
QDomElement elem = doc.documentElement();

QgsRuleBasedRendererV2* r = static_cast<QgsRuleBasedRendererV2*>( QgsRuleBasedRendererV2::create( elem ) );
QVERIFY( r );
check_tree_valid( r->rootRule() );
delete r;
}

void test_load_invalid_xml()
{
QDomDocument doc;
xml2domElement( "rulebasedrenderer_invalid.xml", doc );
QDomElement elem = doc.documentElement();

QgsRuleBasedRendererV2* r = static_cast<QgsRuleBasedRendererV2*>( QgsRuleBasedRendererV2::create( elem ) );
QVERIFY( r == NULL );
}

void test_willRenderFeature_symbolsForFeature()
{
// prepare features
QgsVectorLayer* layer = new QgsVectorLayer( "point?field=fld:int", "x", "memory" );
int idx = layer->fieldNameIndex( "fld" );
QVERIFY( idx != -1 );
QgsFeature f1; f1.addAttribute( idx, QVariant( 2 ) );
QgsFeature f2; f2.addAttribute( idx, QVariant( 8 ) );
QgsFeature f3; f3.addAttribute( idx, QVariant( 100 ) );

// prepare renderer
QgsSymbolV2* s1 = QgsSymbolV2::defaultSymbol( QGis::Point );
QgsSymbolV2* s2 = QgsSymbolV2::defaultSymbol( QGis::Point );
RRule* rootRule = new RRule( NULL );
rootRule->appendChild( new RRule( s1, 0, 0, "fld >= 5 and fld <= 20" ) );
rootRule->appendChild( new RRule( s2, 0, 0, "fld <= 10" ) );
QgsRuleBasedRendererV2 r( rootRule );

QVERIFY( r.capabilities() & QgsFeatureRendererV2::MoreSymbolsPerFeature );

QgsRenderContext ctx; // dummy render context
r.startRender( ctx, layer );

// test willRenderFeature
QVERIFY( r.willRenderFeature( f1 ) == true );
QVERIFY( r.willRenderFeature( f2 ) == true );
QVERIFY( r.willRenderFeature( f3 ) == false );

// test symbolsForFeature
QgsSymbolV2List lst1 = r.symbolsForFeature( f1 );
QVERIFY( lst1.count() == 1 );
QgsSymbolV2List lst2 = r.symbolsForFeature( f2 );
QVERIFY( lst2.count() == 2 );
QgsSymbolV2List lst3 = r.symbolsForFeature( f3 );
QVERIFY( lst3.count() == 0 );

r.stopRender( ctx );

delete layer;
}

private:
void xml2domElement( QString testFile, QDomDocument& doc )
{
QString fileName = QString( TEST_DATA_DIR ) + QDir::separator() + testFile;
QFile f( fileName );
bool fileOpen = f.open( QIODevice::ReadOnly );
QVERIFY( fileOpen );

QString msg;
int line, col;
bool parse = doc.setContent( &f, &msg, &line, &col );
QVERIFY( parse );
}

void check_tree_valid( QgsRuleBasedRendererV2::Rule* root )
{
// root must always exist (although it does not have children)
QVERIFY( root );
// and does not have a parent
QVERIFY( root->parent() == NULL );

foreach( QgsRuleBasedRendererV2::Rule* node, root->children() )
check_non_root_rule( node );
}

void check_non_root_rule( QgsRuleBasedRendererV2::Rule* node )
{
qDebug() << node->dump();
// children must not be NULL
QVERIFY( node );
// and must have a parent
QVERIFY( node->parent() );
// check that all children are okay
foreach ( QgsRuleBasedRendererV2::Rule* child, node->children() )
}

void check_non_root_rule( QgsRuleBasedRendererV2::Rule* node )
{
qDebug() << node->dump();
// children must not be NULL
QVERIFY( node );
// and must have a parent
QVERIFY( node->parent() );
// check that all children are okay
foreach( QgsRuleBasedRendererV2::Rule* child, node->children() )
check_non_root_rule( child );
}
}

};

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