sanya-dbms/processing/tests/ToolsTest.py

"""
***************************************************************************
    ToolsTest
    ---------------------
    Date                 : July 2016
    Copyright            : (C) 2016 by Nyall Dawson
    Email                : nyall dot dawson at gmail dot com
***************************************************************************
*                                                                         *
*   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__ = 'Nyall Dawson'
__date__ = 'July 2016'
__copyright__ = '(C) 2016, Nyall Dawson'

import os
import shutil

from qgis.core import NULL, QgsVectorLayer
import unittest
from qgis.testing import start_app, QgisTestCase

from processing.tests.TestData import points
from processing.tools import vector

testDataPath = os.path.join(os.path.dirname(__file__), 'testdata')

start_app()


class VectorTest(QgisTestCase):

    @classmethod
    def setUpClass(cls):
        cls.cleanup_paths = []

    @classmethod
    def tearDownClass(cls):
        for path in cls.cleanup_paths:
            shutil.rmtree(path)

    def testValues(self):
        test_data = points()
        test_layer = QgsVectorLayer(test_data, 'test', 'ogr')

        # field by index
        res = vector.values(test_layer, 1)
        self.assertEqual(res[1], [1, 2, 3, 4, 5, 6, 7, 8, 9])

        # field by name
        res = vector.values(test_layer, 'id')
        self.assertEqual(res['id'], [1, 2, 3, 4, 5, 6, 7, 8, 9])

        # two fields
        res = vector.values(test_layer, 1, 2)
        self.assertEqual(res[1], [1, 2, 3, 4, 5, 6, 7, 8, 9])
        self.assertEqual(res[2], [2, 1, 0, 2, 1, 0, 0, 0, 0])

        # two fields by name
        res = vector.values(test_layer, 'id', 'id2')
        self.assertEqual(res['id'], [1, 2, 3, 4, 5, 6, 7, 8, 9])
        self.assertEqual(res['id2'], [2, 1, 0, 2, 1, 0, 0, 0, 0])

        # two fields by name and index
        res = vector.values(test_layer, 'id', 2)
        self.assertEqual(res['id'], [1, 2, 3, 4, 5, 6, 7, 8, 9])
        self.assertEqual(res[2], [2, 1, 0, 2, 1, 0, 0, 0, 0])

    def testConvertNulls(self):
        self.assertEqual(vector.convert_nulls([]), [])
        self.assertEqual(vector.convert_nulls([], '_'), [])
        self.assertEqual(vector.convert_nulls([NULL]), [None])
        self.assertEqual(vector.convert_nulls([NULL], '_'), ['_'])
        self.assertEqual(vector.convert_nulls([NULL], -1), [-1])
        self.assertEqual(vector.convert_nulls([1, 2, 3]), [1, 2, 3])
        self.assertEqual(vector.convert_nulls([1, None, 3]), [1, None, 3])
        self.assertEqual(vector.convert_nulls([1, NULL, 3, NULL]), [1, None, 3, None])
        self.assertEqual(vector.convert_nulls([1, NULL, 3, NULL], '_'), [1, '_', 3, '_'])


if __name__ == '__main__':
    unittest.main()