/usr/lib/python2.7/dist-packages/qgis/testing/__init__.py is in python-qgis 2.18.17+dfsg-1.
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"""
***************************************************************************
__init__.py
---------------------
Date : January 2016
Copyright : (C) 2016 by Matthias Kuhn
Email : matthias@opengis.ch
***************************************************************************
* *
* 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__ = 'Matthias Kuhn'
__date__ = 'January 2016'
__copyright__ = '(C) 2016, Matthias Kuhn'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = ':%H$'
import os
import sys
import difflib
import functools
from qgis.PyQt.QtCore import QVariant
from qgis.core import QgsApplication, QgsFeatureRequest, QgsVectorLayer
from nose2.compat import unittest
# Get a backup, we will patch this one later
_TestCase = unittest.TestCase
class TestCase(_TestCase):
def assertLayersEqual(self, layer_expected, layer_result, **kwargs):
"""
:param layer_expected: The first layer to compare
:param layer_result: The second layer to compare
:param request: Optional, A feature request. This can be used to specify
an order by clause to make sure features are compared in
a given sequence if they don't match by default.
:keyword compare: A map of comparison options. e.g.
{ fields: { a: skip, b: { precision: 2 }, geometry: { precision: 5 } }
{ fields: { __all__: cast( str ) } }
"""
try:
request = kwargs['request']
except KeyError:
request = QgsFeatureRequest()
try:
compare = kwargs['compare']
except KeyError:
compare = {}
# Compare CRS
_TestCase.assertEqual(self, layer_expected.dataProvider().crs().authid(), layer_result.dataProvider().crs().authid())
# Compare features
_TestCase.assertEqual(self, layer_expected.featureCount(), layer_result.featureCount())
try:
precision = compare['geometry']['precision']
except KeyError:
precision = 14
expected_features = sorted(layer_expected.getFeatures(request), key=lambda f: f.id())
result_features = sorted(layer_expected.getFeatures(request), key=lambda f: f.id())
for feats in zip(expected_features, result_features):
if feats[0].geometry() is not None:
geom0 = feats[0].geometry().geometry().asWkt(precision)
else:
geom0 = None
if feats[1].geometry() is not None:
geom1 = feats[1].geometry().geometry().asWkt(precision)
else:
geom1 = None
_TestCase.assertEqual(
self,
geom0,
geom1,
'Features {}/{} differ in geometry: \n\n {}\n\n vs \n\n {}'.format(
feats[0].id(),
feats[1].id(),
geom0,
geom1
)
)
for attr_expected, field_expected in zip(feats[0].attributes(), layer_expected.fields().toList()):
attr_result = feats[1][field_expected.name()]
field_result = [fld for fld in layer_expected.fields().toList() if fld.name() == field_expected.name()][0]
try:
cmp = compare['fields'][field1.name()]
except KeyError:
try:
cmp = compare['fields']['__all__']
except KeyError:
cmp = {}
# Skip field
if 'skip' in cmp:
continue
# Cast field to a given type
if 'cast' in cmp:
if cmp['cast'] == 'int':
attr_expected = int(attr_expected) if attr_expected else None
attr_result = int(attr_result) if attr_result else None
if cmp['cast'] == 'float':
attr_expected = float(attr_expected) if attr_expected else None
attr_result = float(attr_result) if attr_result else None
if cmp['cast'] == 'str':
attr_expected = str(attr_expected) if attr_expected else None
attr_result = str(attr_result) if attr_result else None
# Round field (only numeric so it works with __all__)
if 'precision' in cmp and field_expected.type() in [QVariant.Int, QVariant.Double, QVariant.LongLong]:
attr_expected = round(attr_expected, cmp['precision'])
attr_result = round(attr_result, cmp['precision'])
_TestCase.assertEqual(
self,
attr_expected,
attr_result,
'Features {}/{} differ in attributes\n\n * Field1: {} ({})\n * Field2: {} ({})\n\n * {} != {}'.format(
feats[0].id(),
feats[1].id(),
field_expected.name(),
field_expected.typeName(),
field_result.name(),
field_result.typeName(),
repr(attr_expected),
repr(attr_result)
)
)
def assertFilesEqual(self, filepath_expected, filepath_result):
with open(filepath_expected, 'r') as file_expected:
with open(filepath_result, 'r') as file_result:
diff = difflib.unified_diff(
file_expected.readlines(),
file_result.readlines(),
fromfile='expected',
tofile='result',
)
diff = list(diff)
self.assertEqual(0, len(diff), ''.join(diff))
class _UnexpectedSuccess(Exception):
"""
The test was supposed to fail, but it didn't!
"""
pass
def expectedFailure(*args):
"""
Will decorate a unittest function as an expectedFailure. A function
flagged as expectedFailure will be succeed if it raises an exception.
If it does not raise an exception, this will throw an
`_UnexpectedSuccess` exception.
@expectedFailure
def my_test(self):
self.assertTrue(False)
The decorator also accepts a parameter to only expect a failure under
certain conditions.
@expectedFailure(time.localtime().tm_year < 2002)
def my_test(self):
self.assertTrue(qgisIsInvented())
"""
if hasattr(args[0], '__call__'):
# We got a function as parameter: assume usage like
# @expectedFailure
# def testfunction():
func = args[0]
@functools.wraps(func)
def wrapper(*args, **kwargs):
try:
func(*args, **kwargs)
except Exception:
pass
else:
raise _UnexpectedSuccess
return wrapper
else:
# We got a function as parameter: assume usage like
# @expectedFailure(failsOnThisPlatform)
# def testfunction():
condition = args[0]
def realExpectedFailure(func):
@functools.wraps(func)
def wrapper(*args, **kwargs):
if condition:
try:
func(*args, **kwargs)
except Exception:
pass
else:
raise _UnexpectedSuccess
else:
func(*args, **kwargs)
return wrapper
return realExpectedFailure
# Patch unittest
unittest.TestCase = TestCase
unittest.expectedFailure = expectedFailure
def start_app(cleanup=True):
"""
Will start a QgsApplication and call all initialization code like
registering the providers and other infrastructure. It will not load
any plugins.
You can always get the reference to a running app by calling `QgsApplication.instance()`.
The initialization will only happen once, so it is safe to call this method repeatedly.
Parameters
----------
cleanup: Do cleanup on exit. Defaults to true.
Returns
-------
QgsApplication
A QgsApplication singleton
"""
global QGISAPP
try:
QGISAPP
except NameError:
myGuiFlag = True # All test will run qgis in gui mode
# In python3 we need to convert to a bytes object (or should
# QgsApplication accept a QString instead of const char* ?)
try:
argvb = list(map(os.fsencode, sys.argv))
except AttributeError:
argvb = sys.argv
# Note: QGIS_PREFIX_PATH is evaluated in QgsApplication -
# no need to mess with it here.
QGISAPP = QgsApplication(argvb, myGuiFlag)
QGISAPP.initQgis()
print(QGISAPP.showSettings())
if cleanup:
import atexit
@atexit.register
def exitQgis():
QGISAPP.exitQgis()
return QGISAPP
def stop_app():
"""
Cleans up and exits QGIS
"""
global QGISAPP
QGISAPP.exitQgis()
del QGISAPP
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