Add tests for QgsFeatureListComboBox and friends

tests/src/gui/testqgsfeaturelistcombobox.cpp

@@ -0,0 +1,144 @@
+/***************************************************************************
+  testqgsfeaturelistcombobox.cpp
+
+ ---------------------
+ begin                : 3.10.2017
+ copyright            : (C) 2017 by Matthias Kuhn
+ email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   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 "qgstest.h"
+
+#include "qgsapplication.h"
+#include "qgsfeaturelistcombobox.h"
+#include "qgsvectorlayer.h"
+#include "qgsfeaturefiltermodel.h"
+#include "qgsgui.h"
+
+#include <memory>
+
+#include <QLineEdit>
+
+class TestQgsFeatureListComboBox : public QObject
+{
+    Q_OBJECT
+  public:
+    TestQgsFeatureListComboBox() = default;
+
+  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 testSetGetLayer();
+    void testSetGetForeignKey();
+    void testAllowNull();
+
+  private:
+    void waitForLoaded( QgsFeatureListComboBox *cb );
+
+    std::unique_ptr<QgsVectorLayer> mLayer;
+};
+
+void TestQgsFeatureListComboBox::initTestCase()
+{
+  QgsApplication::init();
+  QgsApplication::initQgis();
+}
+
+void TestQgsFeatureListComboBox::cleanupTestCase()
+{
+  QgsApplication::exitQgis();
+}
+
+void TestQgsFeatureListComboBox::init()
+{
+  // create layer
+  mLayer.reset( new QgsVectorLayer( QStringLiteral( "LineString?field=pk:int&field=material:string&field=diameter:int&field=raccord:string" ), QStringLiteral( "vl2" ), QStringLiteral( "memory" ) ) );
+
+  // add features
+  mLayer->startEditing();
+
+  QgsFeature ft1( mLayer->fields() );
+  ft1.setAttribute( QStringLiteral( "pk" ), 10 );
+  ft1.setAttribute( QStringLiteral( "material" ), "iron" );
+  ft1.setAttribute( QStringLiteral( "diameter" ), 120 );
+  ft1.setAttribute( QStringLiteral( "raccord" ), "brides" );
+  mLayer->addFeature( ft1 );
+
+  QgsFeature ft2( mLayer->fields() );
+  ft2.setAttribute( QStringLiteral( "pk" ), 11 );
+  ft2.setAttribute( QStringLiteral( "material" ), "iron" );
+  ft2.setAttribute( QStringLiteral( "diameter" ), 120 );
+  ft2.setAttribute( QStringLiteral( "raccord" ), "sleeve" );
+  mLayer->addFeature( ft2 );
+
+  QgsFeature ft3( mLayer->fields() );
+  ft3.setAttribute( QStringLiteral( "pk" ), 12 );
+  ft3.setAttribute( QStringLiteral( "material" ), "steel" );
+  ft3.setAttribute( QStringLiteral( "diameter" ), 120 );
+  ft3.setAttribute( QStringLiteral( "raccord" ), "collar" );
+  mLayer->addFeature( ft3 );
+
+  mLayer->commitChanges();
+}
+
+void TestQgsFeatureListComboBox::cleanup()
+{
+}
+
+void TestQgsFeatureListComboBox::testSetGetLayer()
+{
+  std::unique_ptr<QgsFeatureListComboBox> cb( new QgsFeatureListComboBox() );
+
+  Q_ASSERT( cb->sourceLayer() == nullptr );
+  cb->setSourceLayer( mLayer.get() );
+  QCOMPARE( cb->sourceLayer(), mLayer.get() );
+}
+
+void TestQgsFeatureListComboBox::testSetGetForeignKey()
+{
+  QgsFeatureListComboBox *cb = new QgsFeatureListComboBox();
+  // std::unique_ptr<QgsFeatureListComboBox> cb( new QgsFeatureListComboBox() );
+
+  Q_ASSERT( cb->identifierValue().isNull() );
+
+  cb->setSourceLayer( mLayer.get() );
+  cb->setDisplayExpression( "\"material\"" );
+  cb->lineEdit()->setText( "ro" );
+  emit cb->lineEdit()->textChanged( "ro" );
+  Q_ASSERT( cb->identifierValue().isNull() );
+
+  waitForLoaded( cb );
+
+  Q_ASSERT( cb->identifierValue().isNull() );
+
+  cb->setIdentifierValue( 20 );
+  QCOMPARE( cb->identifierValue(), QVariant( 20 ) );
+}
+
+void TestQgsFeatureListComboBox::testAllowNull()
+{
+  Q_ASSERT( false );
+  // Note to self: implement this!
+}
+
+void TestQgsFeatureListComboBox::waitForLoaded( QgsFeatureListComboBox *cb )
+{
+  QgsFeatureFilterModel *model = qobject_cast<QgsFeatureFilterModel *>( cb->model() );
+
+  // Wait
+  while ( model->isLoading() )
+  {}
+}
+
+QGSTEST_MAIN( TestQgsFeatureListComboBox )
+#include "testqgsfeaturelistcombobox.moc"