Add test for QgsVirtualLayerProvider

tests/src/providers/CMakeLists.txt

@@ -12,6 +12,7 @@ include_directories(
   ${CMAKE_SOURCE_DIR}/src/providers/mssql
   ${CMAKE_SOURCE_DIR}/src/providers/ogr
   ${CMAKE_SOURCE_DIR}/src/providers/virtualraster
+  ${CMAKE_SOURCE_DIR}/src/providers/virtual
   ${CMAKE_SOURCE_DIR}/src/test
 )
 include_directories(SYSTEM
@@ -35,6 +36,7 @@ set_target_properties(test_provider_wcsprovider PROPERTIES
 add_qgis_test(testqgswmscapabilities.cpp MODULE provider LINKEDLIBRARIES provider_wms_a qgis_core)
 add_qgis_test(testqgswmsccapabilities.cpp MODULE provider LINKEDLIBRARIES provider_wms_a qgis_core)
 add_qgis_test(testqgswmsprovider.cpp MODULE provider LINKEDLIBRARIES provider_wms_a qgis_core)
+add_qgis_test(testqgsvirtuallayerprovider.cpp MODULE provider LINKEDLIBRARIES provider_virtuallayer_a qgis_core)
 
 if (POSTGRES_FOUND)
   add_qgis_test(testqgspostgresexpressioncompiler.cpp MODULE provider LINKEDLIBRARIES provider_postgres_a qgis_core)

tests/src/providers/testqgsvirtuallayerprovider.cpp

@@ -0,0 +1,91 @@
+/***************************************************************************
+     testqgsvirtuallayerprovider.cpp
+     ------------------------------------
+    Date                 : October 2023
+    Copyright            : (C) 2023 by Sandro Santilli
+    Email                : strk at kbt dot net
+ ***************************************************************************
+ *                                                                         *
+ *   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 <limits>
+
+#include "qgstest.h"
+#include <QObject>
+#include <QString>
+#include <QStringList>
+#include <QApplication>
+#include <QFileInfo>
+#include <QDir>
+#include <fstream>
+#include <QVector>
+#include <QTest>
+#include <QStandardPaths>
+#include <QQueue>
+
+//qgis includes...
+#include "qgis.h"
+#include "qgsapplication.h"
+//#include "qgsproviderregistry.h"
+#include "qgsvirtuallayerprovider.h"
+//#include "qgsgeometry.h"
+//#include "qgsfeedback.h"
+//#include "qgsprovidermetadata.h"
+
+/**
+ * \ingroup UnitTests
+ * This is a unit test for the Virtual Layer provider
+ */
+class TestQgsVirtualLayerProvider : public QgsTest
+{
+    Q_OBJECT
+
+  public:
+
+    TestQgsVirtualLayerProvider() : QgsTest( QStringLiteral( "Virtual Layer Provider Tests" ) ) {}
+
+  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 testConstructor();
+
+  private:
+    QString mTestDataDir;
+};
+
+//runs before all tests
+void TestQgsVirtualLayerProvider::initTestCase()
+{
+  // init QGIS's paths - true means that all path will be inited from prefix
+  QgsApplication::init();
+  QgsApplication::initQgis();
+
+  mTestDataDir = QStringLiteral( TEST_DATA_DIR ) + '/'; //defined in CmakeLists.txt
+}
+
+//runs after all tests
+void TestQgsVirtualLayerProvider::cleanupTestCase()
+{
+  QgsApplication::exitQgis();
+}
+
+void TestQgsVirtualLayerProvider::testConstructor()
+{
+  QgsDataProvider::ProviderOptions opts;
+  QString uri;
+  std::unique_ptr<QgsVectorDataProvider> prov( new QgsVirtualLayerProvider( uri, opts ) );
+
+  const QgsRectangle rectNull = QgsRectangle::createNull();
+  QCOMPARE( prov->sourceExtent(), rectNull );
+}
+
+QGSTEST_MAIN( TestQgsVirtualLayerProvider )
+#include "testqgsvirtuallayerprovider.moc"