mirror of
https://github.com/qgis/QGIS.git
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286 lines
9.5 KiB
Python
286 lines
9.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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__init__.py
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---------------------
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Date : January 2016
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Copyright : (C) 2016 by Matthias Kuhn
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Email : matthias@opengis.ch
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Matthias Kuhn'
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__date__ = 'January 2016'
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__copyright__ = '(C) 2016, Matthias Kuhn'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = ':%H$'
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import os
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import sys
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import difflib
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import functools
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from PyQt.QtCore import QVariant
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from qgis.core import QgsApplication, QgsFeatureRequest, QgsVectorLayer
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from nose2.compat import unittest
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# Get a backup, we will patch this one later
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_TestCase = unittest.TestCase
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class TestCase(_TestCase):
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def assertLayersEqual(self, layer_expected, layer_result, **kwargs):
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"""
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:param layer_expected: The first layer to compare
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:param layer_result: The second layer to compare
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:param request: Optional, A feature request. This can be used to specify
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an order by clause to make sure features are compared in
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a given sequence if they don't match by default.
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:keyword compare: A map of comparison options. e.g.
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{ fields: { a: skip, b: { precision: 2 }, geometry: { precision: 5 } }
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{ fields: { __all__: cast( str ) } }
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"""
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try:
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request = kwargs['request']
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except KeyError:
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request = QgsFeatureRequest()
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try:
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compare = kwargs['compare']
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except KeyError:
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compare = {}
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# Compare CRS
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_TestCase.assertEqual(self, layer_expected.dataProvider().crs().authid(), layer_result.dataProvider().crs().authid())
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# Compare features
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_TestCase.assertEqual(self, layer_expected.featureCount(), layer_result.featureCount())
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try:
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precision = compare['geometry']['precision']
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except KeyError:
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precision = 14
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for feats in zip(layer_expected.getFeatures(request), layer_result.getFeatures(request)):
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if feats[0].geometry() is not None:
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geom0 = feats[0].geometry().geometry().asWkt(precision)
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else:
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geom0 = None
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if feats[1].geometry() is not None:
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geom1 = feats[1].geometry().geometry().asWkt(precision)
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else:
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geom1 = None
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_TestCase.assertEquals(
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self,
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geom0,
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geom1,
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'Features {}/{} differ in geometry: \n\n {}\n\n vs \n\n {}'.format(
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feats[0].id(),
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feats[1].id(),
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geom0,
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geom1
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)
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)
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for attr_expected, field_expected in zip(feats[0].attributes(), layer_expected.fields().toList()):
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attr_result = feats[1][field_expected.name()]
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field_result = [fld for fld in layer_expected.fields().toList() if fld.name() == field_expected.name()][0]
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try:
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cmp = compare['fields'][field1.name()]
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except KeyError:
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try:
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cmp = compare['fields']['__all__']
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except KeyError:
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cmp = {}
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# Skip field
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if 'skip' in cmp:
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continue
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# Cast field to a given type
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if 'cast' in cmp:
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if cmp['cast'] == 'int':
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attr_expected = int(attr_expected) if attr_expected else None
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attr_result = int(attr_result) if attr_result else None
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if cmp['cast'] == 'float':
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attr_expected = float(attr_expected) if attr_expected else None
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attr_result = float(attr_result) if attr_result else None
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if cmp['cast'] == 'str':
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attr_expected = str(attr_expected) if attr_expected else None
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attr_result = str(attr_result) if attr_result else None
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# Round field (only numeric so it works with __all__)
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if 'precision' in cmp and field_expected.type() in [QVariant.Int, QVariant.Double, QVariant.LongLong]:
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attr_expected = round(attr_expected, cmp['precision'])
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attr_result = round(attr_result, cmp['precision'])
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_TestCase.assertEqual(
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self,
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attr_expected,
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attr_result,
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'Features {}/{} differ in attributes\n\n * Field1: {} ({})\n * Field2: {} ({})\n\n * {} != {}'.format(
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feats[0].id(),
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feats[1].id(),
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field_expected.name(),
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field_expected.typeName(),
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field_result.name(),
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field_result.typeName(),
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repr(attr_expected),
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repr(attr_result)
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)
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)
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def assertFilesEqual(self, filepath_expected, filepath_result):
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with open(filepath_expected, 'r') as file_expected:
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with open(filepath_result, 'r') as file_result:
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diff = difflib.unified_diff(
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file_expected.readlines(),
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file_result.readlines(),
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fromfile='expected',
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tofile='result',
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)
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diff = list(diff)
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self.assertEqual(0, len(diff), ''.join(diff))
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class _UnexpectedSuccess(Exception):
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"""
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The test was supposed to fail, but it didn't!
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"""
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pass
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def expectedFailure(*args):
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"""
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Will decorate a unittest function as an expectedFailure. A function
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flagged as expectedFailure will be succeed if it raises an exception.
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If it does not raise an exception, this will throw an
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`_UnexpectedSuccess` exception.
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@expectedFailure
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def my_test(self):
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self.assertTrue(False)
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The decorator also accepts a parameter to only expect a failure under
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certain conditions.
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@expectedFailure(time.localtime().tm_year < 2002)
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def my_test(self):
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self.assertTrue(qgisIsInvented())
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"""
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if hasattr(args[0], '__call__'):
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# We got a function as parameter: assume usage like
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# @expectedFailure
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# def testfunction():
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func = args[0]
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@functools.wraps(func)
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def wrapper(*args, **kwargs):
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try:
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func(*args, **kwargs)
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except Exception:
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pass
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else:
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raise _UnexpectedSuccess
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return wrapper
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else:
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# We got a function as parameter: assume usage like
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# @expectedFailure(failsOnThisPlatform)
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# def testfunction():
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condition = args[0]
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def realExpectedFailure(func):
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@functools.wraps(func)
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def wrapper(*args, **kwargs):
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if condition:
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try:
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func(*args, **kwargs)
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except Exception:
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pass
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else:
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raise _UnexpectedSuccess
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else:
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func(*args, **kwargs)
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return wrapper
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return realExpectedFailure
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# Patch unittest
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unittest.TestCase = TestCase
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unittest.expectedFailure = expectedFailure
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def start_app(cleanup=True):
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"""
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Will start a QgsApplication and call all initialization code like
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registering the providers and other infrastructure. It will not load
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any plugins.
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You can always get the reference to a running app by calling `QgsApplication.instance()`.
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The initialization will only happen once, so it is safe to call this method repeatedly.
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Parameters
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----------
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cleanup: Do cleanup on exit. Defaults to true.
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Returns
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-------
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QgsApplication
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A QgsApplication singleton
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"""
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global QGISAPP
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try:
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QGISAPP
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except NameError:
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myGuiFlag = True # All test will run qgis in gui mode
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# In python3 we need to convert to a bytes object (or should
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# QgsApplication accept a QString instead of const char* ?)
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try:
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argvb = list(map(os.fsencode, sys.argv))
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except AttributeError:
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argvb = sys.argv
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# Note: QGIS_PREFIX_PATH is evaluated in QgsApplication -
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# no need to mess with it here.
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QGISAPP = QgsApplication(argvb, myGuiFlag)
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QGISAPP.initQgis()
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print(QGISAPP.showSettings())
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if cleanup:
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import atexit
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@atexit.register
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def exitQgis():
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QGISAPP.exitQgis()
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return QGISAPP
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def stop_app():
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"""
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Cleans up and exits QGIS
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"""
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global QGISAPP
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QGISAPP.exitQgis()
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del QGISAPP
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