Deprecate methods for constructing CRS from Postgis srids

Constructing CRS using Postgis srids is highly discouraged,
and instead CRSes should always be constructed using auth:id
codes or WKT strings.

QGIS 4.0: The logic should be isolated into the postgres
provider alone, and not exposed to stable API

python/core/auto_generated/qgscoordinatereferencesystem.sip.in

@@ -349,13 +349,18 @@ and refer to QGIS internal CRS IDs.
 %End
 
 
-    bool createFromSrid( long srid );
+ bool createFromSrid( long srid ) /Deprecated/;
 %Docstring
 Sets this CRS by lookup of the given PostGIS SRID in the CRS database.
 
 :param srid: The PostGIS SRID for the desired spatial reference system.
 
 :return: ``True`` on success else ``False``
+
+.. deprecated::
+   Use alternative methods for SRS construction instead -- this
+method was specifically created for use by the postgres provider alone,
+and using it elsewhere will lead to subtle bugs.
 %End
 
     bool createFromWkt( const QString &wkt );

src/core/qgscoordinatereferencesystem.cpp

@@ -252,7 +252,7 @@ bool QgsCoordinateReferenceSystem::createFromId( const long id, CrsType type )
       result = createFromSrsId( id );
       break;
     case PostgisCrsId:
-      result = createFromSrid( id );
+      result = createFromPostgisSrid( id );
       break;
     case EpsgCrsId:
       result = createFromOgcWmsCrs( QStringLiteral( "EPSG:%1" ).arg( id ) );
@@ -292,7 +292,7 @@ bool QgsCoordinateReferenceSystem::createFromString( const QString &definition )
     else if ( authName == QLatin1String( "postgis" ) )
     {
       const long id = match.captured( 2 ).toLong();
-      result = createFromId( id, PostgisCrsId );
+      result = createFromPostgisSrid( id );
     }
     else if ( authName == QLatin1String( "esri" ) || authName == QLatin1String( "osgeo" ) || authName == QLatin1String( "ignf" ) || authName == QLatin1String( "zangi" ) || authName == QLatin1String( "iau2000" ) )
     {
@@ -498,6 +498,11 @@ void QgsCoordinateReferenceSystem::validate()
 }
 
 bool QgsCoordinateReferenceSystem::createFromSrid( const long id )
+{
+  return createFromPostgisSrid( id );
+}
+
+bool QgsCoordinateReferenceSystem::createFromPostgisSrid( const long id )
 {
   QgsReadWriteLocker locker( *sSrIdCacheLock(), QgsReadWriteLocker::Read );
   if ( !sDisableSrIdCache )

src/core/qgscoordinatereferencesystem.h

@@ -208,7 +208,7 @@ class CORE_EXPORT QgsCoordinateReferenceSystem
     enum CrsType
     {
       InternalCrsId,  //!< Internal ID used by QGIS in the local SQLite database
-      PostgisCrsId,   //!< SRID used in PostGIS
+      PostgisCrsId,   //!< SRID used in PostGIS. DEPRECATED -- DO NOT USE
       EpsgCrsId       //!< EPSG code
     };
 
@@ -364,8 +364,12 @@ class CORE_EXPORT QgsCoordinateReferenceSystem
      * Sets this CRS by lookup of the given PostGIS SRID in the CRS database.
      * \param srid The PostGIS SRID for the desired spatial reference system.
      * \returns TRUE on success else FALSE
+     *
+     * \deprecated Use alternative methods for SRS construction instead -- this
+     * method was specifically created for use by the postgres provider alone,
+     * and using it elsewhere will lead to subtle bugs.
      */
-    bool createFromSrid( long srid );
+    Q_DECL_DEPRECATED bool createFromSrid( long srid ) SIP_DEPRECATED;
 
     /**
      * Sets this CRS using a WKT definition.
@@ -933,6 +937,9 @@ class CORE_EXPORT QgsCoordinateReferenceSystem
     static const QHash< long, QgsCoordinateReferenceSystem > &srIdCache();
 
     friend class TestQgsCoordinateReferenceSystem;
+    friend class QgsPostgresProvider;
+
+    bool createFromPostgisSrid( const long id );
 };
 
 Q_DECLARE_METATYPE( QgsCoordinateReferenceSystem )

src/providers/db2/qgsdb2provider.cpp

@@ -548,12 +548,6 @@ QgsCoordinateReferenceSystem QgsDb2Provider::crs() const
 {
   if ( !mCrs.isValid() && mSRId > 0 )
   {
-    mCrs.createFromSrid( mSRId );
-    if ( mCrs.isValid() )
-    {
-      return mCrs;
-    }
-
     // try to load crs from the database tables as a fallback
     QSqlQuery query = QSqlQuery( mDatabase );
     query.setForwardOnly( true );

src/providers/gpx/qgsgpxprovider.cpp

@@ -534,7 +534,7 @@ QString QgsGPXProvider::description() const
 
 QgsCoordinateReferenceSystem QgsGPXProvider::crs() const
 {
-  return QgsCoordinateReferenceSystem( GEOSRID, QgsCoordinateReferenceSystem::PostgisCrsId ); // use WGS84
+  return QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:4326" ) );
 }
 
 QgsDataProvider *QgsGpxProviderMetadata::createProvider( const QString &uri, const QgsDataProvider::ProviderOptions &options )

src/providers/postgres/qgspostgresprovider.cpp

@@ -4328,7 +4328,9 @@ QgsCoordinateReferenceSystem QgsPostgresProvider::crs() const
 {
   QgsCoordinateReferenceSystem srs;
   int srid = mRequestedSrid.isEmpty() ? mDetectedSrid.toInt() : mRequestedSrid.toInt();
-  srs.createFromSrid( srid );
+
+  // TODO QGIS 4 - move the logic from createFromSridInternal to sit within the postgres provider alone
+  srs.createFromPostgisSrid( srid );
   if ( !srs.isValid() )
   {
     static QMutex sMutex;

tests/src/core/testqgscoordinatereferencesystem.cpp

@@ -337,7 +337,7 @@ void TestQgsCoordinateReferenceSystem::ogcWmsCrsCache()
 void TestQgsCoordinateReferenceSystem::createFromSrid()
 {
   QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
+  myCrs.createFromPostgisSrid( GEOSRID );
   debugPrint( myCrs );
   QVERIFY( myCrs.isValid() );
   QCOMPARE( myCrs.srsid(), GEOCRS_ID );
@@ -353,24 +353,24 @@ void TestQgsCoordinateReferenceSystem::sridCache()
 {
   // test that crs can be retrieved correctly from cache
   QgsCoordinateReferenceSystem crs;
-  crs.createFromSrid( 3112 );
+  crs.createFromPostgisSrid( 3112 );
   QVERIFY( crs.isValid() );
   QCOMPARE( crs.authid(), QStringLiteral( "EPSG:3112" ) );
   QVERIFY( QgsCoordinateReferenceSystem::srIdCache().contains( 3112 ) );
   // a second time, so crs is fetched from cache
   QgsCoordinateReferenceSystem crs2;
-  crs2.createFromSrid( 3112 );
+  crs2.createFromPostgisSrid( 3112 );
   QVERIFY( crs2.isValid() );
   QCOMPARE( crs2.authid(), QStringLiteral( "EPSG:3112" ) );
 
   // invalid
   QgsCoordinateReferenceSystem crs3;
-  crs3.createFromSrid( -3141 );
+  crs3.createFromPostgisSrid( -3141 );
   QVERIFY( !crs3.isValid() );
   QVERIFY( QgsCoordinateReferenceSystem::srIdCache().contains( -3141 ) );
   // a second time, so invalid crs is fetched from cache
   QgsCoordinateReferenceSystem crs4;
-  crs4.createFromSrid( -3141 );
+  crs4.createFromPostgisSrid( -3141 );
   QVERIFY( !crs4.isValid() );
 
   QgsCoordinateReferenceSystem::invalidateCache();
@@ -611,8 +611,7 @@ void TestQgsCoordinateReferenceSystem::createFromESRIWkt()
 void TestQgsCoordinateReferenceSystem::createFromSrId()
 {
   QgsCoordinateReferenceSystem myCrs;
-  QVERIFY( myCrs.createFromSrid( GEOSRID ) );
-  debugPrint( myCrs );
+  QVERIFY( myCrs.createFromPostgisSrid( GEOSRID ) );
   QVERIFY( myCrs.isValid() );
   QCOMPARE( myCrs.srsid(), GEOCRS_ID );
 }
@@ -778,10 +777,10 @@ void TestQgsCoordinateReferenceSystem::fromStringCache()
 
 void TestQgsCoordinateReferenceSystem::isValid()
 {
-  QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
-  QVERIFY( myCrs.isValid() );
-  debugPrint( myCrs );
+  QgsCoordinateReferenceSystem crs( QStringLiteral( "EPSG:4326" ) );
+  QVERIFY( crs.isValid() );
+  crs = QgsCoordinateReferenceSystem( QStringLiteral( "xxxxxxxxxxxxxxx" ) );
+  QVERIFY( !crs.isValid() );
 }
 
 void TestQgsCoordinateReferenceSystem::validate()
@@ -815,20 +814,14 @@ void TestQgsCoordinateReferenceSystem::validate()
 
 void TestQgsCoordinateReferenceSystem::equality()
 {
-  QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
-  QgsCoordinateReferenceSystem myCrs2;
-  myCrs2.createFromSrsId( GEOCRS_ID );
-  debugPrint( myCrs );
+  QgsCoordinateReferenceSystem myCrs( QStringLiteral( "EPSG:4326" ) );
+  QgsCoordinateReferenceSystem myCrs2( QStringLiteral( "EPSG:4326" ) );
   QVERIFY( myCrs == myCrs2 );
 }
 void TestQgsCoordinateReferenceSystem::noEquality()
 {
-  QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
-  QgsCoordinateReferenceSystem myCrs2;
-  myCrs2.createFromSrsId( 4327 );
-  debugPrint( myCrs );
+  QgsCoordinateReferenceSystem myCrs( QStringLiteral( "EPSG:4326" ) );
+  QgsCoordinateReferenceSystem myCrs2( QStringLiteral( "EPSG:4327" ) );
   QVERIFY( myCrs != myCrs2 );
 }
 
@@ -840,8 +833,7 @@ void TestQgsCoordinateReferenceSystem::equalityInvalid()
 }
 void TestQgsCoordinateReferenceSystem::readWriteXml()
 {
-  QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
+  QgsCoordinateReferenceSystem myCrs( QStringLiteral( "EPSG:4326" ) );
   QVERIFY( myCrs.isValid() );
   QDomDocument document( QStringLiteral( "test" ) );
   QDomElement node = document.createElement( QStringLiteral( "crs" ) );
@@ -1056,15 +1048,13 @@ void TestQgsCoordinateReferenceSystem::customSrsValidation()
 void TestQgsCoordinateReferenceSystem::postgisSrid()
 {
   QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
+  myCrs.createFromPostgisSrid( GEOSRID );
   QVERIFY( myCrs.postgisSrid() == GEOSRID );
   debugPrint( myCrs );
 }
 void TestQgsCoordinateReferenceSystem::ellipsoidAcronym()
 {
-  QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
-  debugPrint( myCrs );
+  QgsCoordinateReferenceSystem myCrs( QStringLiteral( "EPSG:4326" ) );
 #if PROJ_VERSION_MAJOR>=6
   QCOMPARE( myCrs.ellipsoidAcronym(), QStringLiteral( "EPSG:7030" ) );
 #else
@@ -1081,35 +1071,26 @@ void TestQgsCoordinateReferenceSystem::ellipsoidAcronym()
 }
 void TestQgsCoordinateReferenceSystem::toWkt()
 {
-  QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
+  QgsCoordinateReferenceSystem myCrs( QStringLiteral( "EPSG:4326" ) );
   QString myWkt = myCrs.toWkt();
-  debugPrint( myCrs );
-  //Note: this is not the same as geoWkt() as OGR strips off the TOWGS clause...
   QString myStrippedWkt( "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\",0.0174532925199433,AUTHORITY"
                          "[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4326\"]]" );
-  qDebug() << "wkt:      " << myWkt;
-  qDebug() << "stripped: " << myStrippedWkt;
-  QVERIFY( myWkt == myStrippedWkt );
+  QCOMPARE( myWkt, myStrippedWkt );
 }
 void TestQgsCoordinateReferenceSystem::toProj()
 {
-  QgsCoordinateReferenceSystem myCrs;
-  myCrs.createFromSrid( GEOSRID );
-  debugPrint( myCrs );
+  QgsCoordinateReferenceSystem myCrs( QStringLiteral( "EPSG:4326" ) );
   //first proj string produced by gdal 1.8-1.9
   //second by gdal 1.7
   QCOMPARE( myCrs.toProj(), geoProj4() );
 }
 void TestQgsCoordinateReferenceSystem::isGeographic()
 {
-  QgsCoordinateReferenceSystem geographic;
-  geographic.createFromSrid( GEOSRID );
+  QgsCoordinateReferenceSystem geographic( QStringLiteral( "EPSG:4326" ) );
   QVERIFY( geographic.isGeographic() );
-  debugPrint( geographic );
 
   QgsCoordinateReferenceSystem nonGeographic;
   nonGeographic.createFromId( 3857, QgsCoordinateReferenceSystem::EpsgCrsId );
@@ -1211,8 +1192,7 @@ void TestQgsCoordinateReferenceSystem::validSrsIds()
 
 void TestQgsCoordinateReferenceSystem::asVariant()
 {
-  QgsCoordinateReferenceSystem original;
-  original.createFromSrid( 3112 );
+  QgsCoordinateReferenceSystem original( QStringLiteral( "EPSG:3112" ) );
 
   //convert to and from a QVariant
   QVariant var = QVariant::fromValue( original );

tests/src/core/testqgscoordinatetransform.cpp

@@ -130,10 +130,8 @@ void TestQgsCoordinateTransform::isValid()
   QgsCoordinateTransform tr;
   QVERIFY( !tr.isValid() );
 
-  QgsCoordinateReferenceSystem srs1;
-  srs1.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem srs2;
-  srs2.createFromSrid( 4326 );
+  QgsCoordinateReferenceSystem srs1( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem srs2( QStringLiteral( "EPSG:4326" ) );
 
   // valid source, invalid destination
   QgsCoordinateTransform tr2( srs1, QgsCoordinateReferenceSystem(), QgsProject::instance() );
@@ -163,10 +161,8 @@ void TestQgsCoordinateTransform::isShortCircuited()
   //invalid transform shortcircuits
   QVERIFY( tr.isShortCircuited() );
 
-  QgsCoordinateReferenceSystem srs1;
-  srs1.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem srs2;
-  srs2.createFromSrid( 4326 );
+  QgsCoordinateReferenceSystem srs1( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem srs2( QStringLiteral( "EPSG:4326" ) );
 
   // valid source, invalid destination
   QgsCoordinateTransform tr2( srs1, QgsCoordinateReferenceSystem(), QgsProject::instance() );
@@ -400,10 +396,8 @@ void TestQgsCoordinateTransform::transform()
 void TestQgsCoordinateTransform::transformBoundingBox()
 {
   //test transforming a bounding box which crosses the 180 degree longitude line
-  QgsCoordinateReferenceSystem sourceSrs;
-  sourceSrs.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem destSrs;
-  destSrs.createFromSrid( 4326 );
+  QgsCoordinateReferenceSystem sourceSrs( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem destSrs( QStringLiteral( "EPSG:4326" ) );
 
   QgsCoordinateTransform tr( sourceSrs, destSrs, QgsProject::instance() );
   QgsRectangle crossingRect( 6374985, -3626584, 7021195, -3272435 );

tests/src/core/testqgsgeometry.cpp

@@ -837,10 +837,8 @@ void TestQgsGeometry::point()
   QCOMPARE( p15.boundingBox(), QgsRectangle( 21.0, 23.0, 21.0, 23.0 ) );
 
   //CRS transform
-  QgsCoordinateReferenceSystem sourceSrs;
-  sourceSrs.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem destSrs;
-  destSrs.createFromSrid( 4202 ); // want a transform with ellipsoid change
+  QgsCoordinateReferenceSystem sourceSrs( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem destSrs( QStringLiteral( "EPSG:4202" ) ); // want a transform with ellipsoid change
   QgsCoordinateTransform tr( sourceSrs, destSrs, QgsProject::instance() );
   QgsPoint p16( QgsWkbTypes::PointZM, 6374985, -3626584, 1, 2 );
   p16.transform( tr, QgsCoordinateTransform::ForwardTransform );
@@ -1881,10 +1879,8 @@ void TestQgsGeometry::circularString()
   QCOMPARE( points.at( 2 ), QgsPoint( QgsWkbTypes::PointZM, 15, 10, 6, 7 ) );
 
   //CRS transform
-  QgsCoordinateReferenceSystem sourceSrs;
-  sourceSrs.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem destSrs;
-  destSrs.createFromSrid( 4202 ); // want a transform with ellipsoid change
+  QgsCoordinateReferenceSystem sourceSrs( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem destSrs( QStringLiteral( "EPSG:4202" ) );// want a transform with ellipsoid change
   QgsCoordinateTransform tr( sourceSrs, destSrs, QgsProject::instance() );
 
   // 2d CRS transform
@@ -3857,10 +3853,8 @@ void TestQgsGeometry::lineString()
   QCOMPARE( points.at( 2 ), QgsPoint( QgsWkbTypes::PointZM, 15, 10, 6, 7 ) );
 
   //CRS transform
-  QgsCoordinateReferenceSystem sourceSrs;
-  sourceSrs.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem destSrs;
-  destSrs.createFromSrid( 4202 ); // want a transform with ellipsoid change
+  QgsCoordinateReferenceSystem sourceSrs( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem destSrs( QStringLiteral( "EPSG:4202" ) );// want a transform with ellipsoid change
   QgsCoordinateTransform tr( sourceSrs, destSrs, QgsProject::instance() );
 
   // 2d CRS transform
@@ -5793,10 +5787,8 @@ void TestQgsGeometry::polygon()
 
   //transform
   //CRS transform
-  QgsCoordinateReferenceSystem sourceSrs;
-  sourceSrs.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem destSrs;
-  destSrs.createFromSrid( 4202 ); // want a transform with ellipsoid change
+  QgsCoordinateReferenceSystem sourceSrs( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem destSrs( QStringLiteral( "EPSG:4202" ) ); // want a transform with ellipsoid change
   QgsCoordinateTransform tr( sourceSrs, destSrs, QgsProject::instance() );
 
   // 2d CRS transform
@@ -10405,10 +10397,8 @@ void TestQgsGeometry::compoundCurve()
   QCOMPARE( points.at( 3 ), QgsPoint( QgsWkbTypes::PointZM, 25, 10, 6, 7 ) );
 
   //CRS transform
-  QgsCoordinateReferenceSystem sourceSrs;
-  sourceSrs.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem destSrs;
-  destSrs.createFromSrid( 4202 ); // want a transform with ellipsoid change
+  QgsCoordinateReferenceSystem sourceSrs( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem destSrs( QStringLiteral( "EPSG:4202" ) ); // want a transform with ellipsoid change
   QgsCoordinateTransform tr( sourceSrs, destSrs, QgsProject::instance() );
 
   // 2d CRS transform
@@ -15379,10 +15369,8 @@ void TestQgsGeometry::geometryCollection()
 
   //transform
   //CRS transform
-  QgsCoordinateReferenceSystem sourceSrs;
-  sourceSrs.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem destSrs;
-  destSrs.createFromSrid( 4202 ); // want a transform with ellipsoid change
+  QgsCoordinateReferenceSystem sourceSrs( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem destSrs( QStringLiteral( "EPSG:4202" ) ); // want a transform with ellipsoid change
   QgsCoordinateTransform tr( sourceSrs, destSrs, QgsProject::instance() );
 
   // 2d CRS transform

tests/src/core/testqgslayoutatlas.cpp

@@ -122,9 +122,7 @@ void TestQgsLayoutAtlas::init()
 {
   //create composition with composer map
 
-  // select epsg:2154
-  QgsCoordinateReferenceSystem crs;
-  crs.createFromSrid( 2154 );
+  QgsCoordinateReferenceSystem crs( QStringLiteral( "EPSG:2154" ) );
   QgsProject::instance()->setCrs( crs );
   mLayout = new QgsPrintLayout( QgsProject::instance() );
   mLayout->initializeDefaults();

tests/src/core/testqgslayoutmapgrid.cpp

@@ -1203,10 +1203,8 @@ void TestQgsLayoutMapGrid::annotationFormats()
   l.addLayoutItem( map );
 
   //create grids in geographic and projected coordinates
-  QgsCoordinateReferenceSystem projectedCrs;
-  projectedCrs.createFromSrid( 3994 );
-  QgsCoordinateReferenceSystem geographicCrs;
-  geographicCrs.createFromSrid( 4326 );
+  QgsCoordinateReferenceSystem projectedCrs( QStringLiteral( "EPSG:3994" ) );
+  QgsCoordinateReferenceSystem geographicCrs( QStringLiteral( "EPSG:4326" ) );
 
   QgsLayoutItemMapGrid gridGeographic( QStringLiteral( "geographic grid" ), map );
   gridGeographic.setCrs( geographicCrs );

tests/src/python/qgis_local_server.py

@@ -787,9 +787,8 @@ if __name__ == '__main__':
     # local_srv.open_temp_dir()
     # sys.exit()
     # creating crs needs app instance to access /resources/srs.db
-    #   crs = QgsCoordinateReferenceSystem()
+    #   crs = QgsCoordinateReferenceSystem('EPSG:32613')
     # default for labeling test data sources: WGS 84 / UTM zone 13N
-    #   crs.createFromSrid(32613)
     req_params = {
         'SERVICE': 'WMS',
         'VERSION': '1.3.0',

tests/src/python/test_qgslayoutatlas.py

@@ -87,8 +87,7 @@ class TestQgsLayoutAtlas(unittest.TestCase):
         # create layout with layout map
 
         # select epsg:2154
-        crs = QgsCoordinateReferenceSystem()
-        crs.createFromSrid(2154)
+        crs = QgsCoordinateReferenceSystem('epsg:2154')
         QgsProject.instance().setCrs(crs)
 
         self.layout = QgsPrintLayout(QgsProject.instance())

tests/src/python/test_qgslayoutexporter.py

@@ -890,8 +890,7 @@ class TestQgsLayoutExporter(unittest.TestCase):
         project = QgsProject()
         project.addMapLayers([layer])
         # select epsg:2154
-        crs = QgsCoordinateReferenceSystem()
-        crs.createFromSrid(2154)
+        crs = QgsCoordinateReferenceSystem('epsg:2154')
         project.setCrs(crs)
 
         layout = QgsPrintLayout(project)

tests/src/python/test_qgspallabeling_base.py

@@ -186,10 +186,8 @@ class TestQgsPalLabeling(unittest.TestCase):
         :rtype: QgsMapSettings
         """
         ms = QgsMapSettings()
-        crs = QgsCoordinateReferenceSystem()
-        """:type: QgsCoordinateReferenceSystem"""
         # default for labeling test data: WGS 84 / UTM zone 13N
-        crs.createFromSrid(32613)
+        crs = QgsCoordinateReferenceSystem('epsg:32613')
         ms.setBackgroundColor(QColor(152, 219, 249))
         ms.setOutputSize(QSize(420, 280))
         ms.setOutputDpi(72)

tests/src/python/test_qgsprojectbadlayers.py

@@ -56,9 +56,7 @@ class TestQgsProjectBadLayers(unittest.TestCase):
         :rtype: QgsMapSettings
         """
         ms = QgsMapSettings()
-        crs = QgsCoordinateReferenceSystem()
-        """:type: QgsCoordinateReferenceSystem"""
-        crs.createFromSrid(4326)
+        crs = QgsCoordinateReferenceSystem('epsg:4326')
         ms.setBackgroundColor(QColor(152, 219, 249))
         ms.setOutputSize(QSize(420, 280))
         ms.setOutputDpi(72)

tests/src/python/test_selective_masking.py

@@ -99,8 +99,7 @@ class TestSelectiveMasking(unittest.TestCase):
         self.report = "<h1>Python Selective Masking Tests</h1>\n"
 
         self.map_settings = QgsMapSettings()
-        crs = QgsCoordinateReferenceSystem()
-        crs.createFromSrid(4326)
+        crs = QgsCoordinateReferenceSystem('epsg:4326')
         extent = QgsRectangle(-123.0, 22.7, -76.4, 46.9)
         self.map_settings.setBackgroundColor(QColor(152, 219, 249))
         self.map_settings.setOutputSize(QSize(420, 280))