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"""QGIS Unit tests for Grass Algorithm with postgreraster provider
.. note:: 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.
"""
__author__ = "Jan Caha"
__date__ = "01/08/2025"
__copyright__ = "Copyright 2025, The QGIS Project"
import os
import tempfile
from shutil import rmtree
import unittest
from qgis.testing import start_app, QgisTestCase
from qgis.core import (
QgsApplication,
QgsRasterLayer,
QgsDataSourceUri,
QgsAuthMethodConfig,
QgsProcessingContext,
QgsProcessingFeedback,
)
from qgis import processing
from grassprovider.grass_provider import GrassProvider
from grassprovider.grass_utils import GrassUtils
QGIS_AUTH_DB_DIR_PATH = tempfile.mkdtemp()
os.environ["QGIS_AUTH_DB_DIR_PATH"] = QGIS_AUTH_DB_DIR_PATH
start_app()
class TestProcessingGrassAlgsPostgreRasterProvider(QgisTestCase):
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.provider = GrassProvider()
QgsApplication.processingRegistry().addProvider(cls.provider)
cls.cleanup_paths = []
assert GrassUtils.installedVersion()
@classmethod
def tearDownClass(cls):
"""Run after all tests"""
rmtree(QGIS_AUTH_DB_DIR_PATH)
del os.environ["QGIS_AUTH_DB_DIR_PATH"]
super().tearDownClass()
def test_algorithm_r_buffer(self):
"""
Test grass algorithm r.buffer with postgreraster provider
"""
context = QgsProcessingContext()
feedback = QgsProcessingFeedback()
rl = QgsRasterLayer(
"dbname='mydb' host=localhost port=5432 user='asdf' password='42'"
" sslmode=disable table=some_table schema=some_schema column=rast sql=pk = 2",
"pg_layer",
"postgresraster",
)
alg = QgsApplication.processingRegistry().algorithmById("grass:r.buffer")
self.assertTrue(alg)
params = {
"input": rl,
"distances": "100,200,500",
"units": 0,
"-z": False,
"output": "TEMPORARY_OUTPUT",
"GRASS_REGION_PARAMETER": None,
"GRASS_REGION_CELLSIZE_PARAMETER": 0,
"GRASS_RASTER_FORMAT_OPT": "",
"GRASS_RASTER_FORMAT_META": "",
}
can_run, _ = alg.checkParameterValues(parameters=params, context=context)
self.assertTrue(can_run)
res = alg.run(params, context, feedback)
# should be tuple
self.assertTrue(res)
# should be true if algorithm run successfully
self.assertTrue(res[1])
# should be dict with output keys
self.assertTrue(isinstance(res[0], dict))
# should be path to result file
self.assertTrue(isinstance(res[0]["output"], str))
def test_algorithm_r_info(self):
"""
Test grass algorithm r.info with postgreraster provider
"""
context = QgsProcessingContext()
feedback = QgsProcessingFeedback()
rl = QgsRasterLayer(
"dbname='mydb' host=localhost port=5432 user='asdf' password='42'"
" sslmode=disable table=some_table schema=some_schema column=rast sql=pk = 2",
"pg_layer",
"postgresraster",
)
alg = QgsApplication.processingRegistry().algorithmById("grass:r.info")
params = {
"map": rl,
"-r": False,
"-g": False,
"-h": False,
"-e": False,
"html": "./report.html",
"GRASS_REGION_PARAMETER": None,
"GRASS_REGION_CELLSIZE_PARAMETER": 0,
}
can_run, _ = alg.checkParameterValues(parameters=params, context=context)
self.assertTrue(can_run)
res = alg.run(params, context, feedback)
# should be tuple
self.assertTrue(res)
# should be true if algorithm run successfully
self.assertTrue(res[1])
# should be dict with output keys
self.assertTrue(isinstance(res[0], dict))
# should be path to result file
self.assertTrue(isinstance(res[0]["html"], str))
if __name__ == "__main__":
unittest.main()
|
