[processing][gdal] More descriptive name for separate parameter

in buildvrt algorithm

Fixes #19212

Author: nyalldawson

python/plugins/processing/algs/gdal/buildvrt.py

@@ -83,7 +83,7 @@ def defaultFileExtension(self):
                                                      options=self.RESOLUTION_OPTIONS,
                                                      defaultValue=0))
         self.addParameter(QgsProcessingParameterBoolean(self.SEPARATE,
-                                                        QCoreApplication.translate("ParameterVrtDestination", 'Layer stack'),
+                                                        QCoreApplication.translate("ParameterVrtDestination", 'Place each input file into a separate band'),
                                                         defaultValue=True))
         self.addParameter(QgsProcessingParameterBoolean(self.PROJ_DIFFERENCE,
                                                         QCoreApplication.translate("ParameterVrtDestination", 'Allow projection difference'),

python/plugins/processing/tests/GdalAlgorithmsTest.py

@@ -41,6 +41,7 @@
 from processing.algs.gdal.GridInverseDistanceNearestNeighbor import GridInverseDistanceNearestNeighbor
 from processing.algs.gdal.GridLinear import GridLinear
 from processing.algs.gdal.GridNearestNeighbor import GridNearestNeighbor
+from processing.algs.gdal.buildvrt import buildvrt
 from processing.algs.gdal.hillshade import hillshade
 from processing.algs.gdal.ogr2ogr import ogr2ogr
 from processing.algs.gdal.proximity import proximity
@@ -638,6 +639,56 @@ def testGdalCalc(self):
                 'OUTPUT': output}, context, feedback),
             ['gdal_calc', '--calc "{}" --format JPEG --type Float32 -A {} --A_band 1 --outfile {}'.format(formula, source, output)])
 
+    def testBuildVrt(self):
+        context = QgsProcessingContext()
+        feedback = QgsProcessingFeedback()
+        source = os.path.join(testDataPath, 'dem.tif')
+        alg = buildvrt()
+        alg.initAlgorithm()
+
+        commands = alg.getConsoleCommands({'LAYERS': [source],
+                                           'OUTPUT': 'd:/temp/test.vrt'}, context, feedback)
+        self.assertEqual(len(commands), 2)
+        self.assertEqual(commands[0], 'gdalbuildvrt')
+        self.assertIn('-resolution average', commands[1])
+        self.assertIn('-separate', commands[1])
+        self.assertNotIn('-allow_projection_difference', commands[1])
+        self.assertIn('-input_file_list', commands[1])
+        self.assertIn('d:/temp/test.vrt', commands[1])
+
+        commands = alg.getConsoleCommands({'LAYERS': [source],
+                                           'RESOLUTION': 2,
+                                           'OUTPUT': 'd:/temp/test.vrt'}, context, feedback)
+        self.assertEqual(len(commands), 2)
+        self.assertEqual(commands[0], 'gdalbuildvrt')
+        self.assertIn('-resolution lowest', commands[1])
+        self.assertIn('-separate', commands[1])
+        self.assertNotIn('-allow_projection_difference', commands[1])
+        self.assertIn('-input_file_list', commands[1])
+        self.assertIn('d:/temp/test.vrt', commands[1])
+
+        commands = alg.getConsoleCommands({'LAYERS': [source],
+                                           'SEPARATE': False,
+                                           'OUTPUT': 'd:/temp/test.vrt'}, context, feedback)
+        self.assertEqual(len(commands), 2)
+        self.assertEqual(commands[0], 'gdalbuildvrt')
+        self.assertIn('-resolution average', commands[1])
+        self.assertNotIn('-allow_projection_difference', commands[1])
+        self.assertNotIn('-separate', commands[1])
+        self.assertIn('-input_file_list', commands[1])
+        self.assertIn('d:/temp/test.vrt', commands[1])
+
+        commands = alg.getConsoleCommands({'LAYERS': [source],
+                                           'PROJ_DIFFERENCE': True,
+                                           'OUTPUT': 'd:/temp/test.vrt'}, context, feedback)
+        self.assertEqual(len(commands), 2)
+        self.assertEqual(commands[0], 'gdalbuildvrt')
+        self.assertIn('-resolution average', commands[1])
+        self.assertIn('-allow_projection_difference', commands[1])
+        self.assertIn('-separate', commands[1])
+        self.assertIn('-input_file_list', commands[1])
+        self.assertIn('d:/temp/test.vrt', commands[1])
+
     def testGdalTindex(self):
         context = QgsProcessingContext()
         feedback = QgsProcessingFeedback()