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# -*- coding: utf-8 -*-
from __future__ import division, unicode_literals, print_function, absolute_import
import os
import logging
from contextlib import contextmanager
from pint.compat import ndarray, unittest, np
from pint import logger, UnitRegistry
from pint.quantity import _Quantity
from logging.handlers import BufferingHandler
#h = logging.StreamHandler()
#f = logging.Formatter("%(levelname)s %(asctime)s %(funcName)s %(lineno)d %(message)s")
#h.setLevel(logging.DEBUG)
#h.setFormatter(f)
#logger.addHandler(h)
#logger.setLevel(logging.DEBUG)
class TestHandler(BufferingHandler):
def __init__(self, only_warnings=False):
# BufferingHandler takes a "capacity" argument
# so as to know when to flush. As we're overriding
# shouldFlush anyway, we can set a capacity of zero.
# You can call flush() manually to clear out the
# buffer.
self.only_warnings = only_warnings
BufferingHandler.__init__(self, 0)
def shouldFlush(self):
return False
def emit(self, record):
if self.only_warnings and record.level != logging.WARNING:
return
self.buffer.append(record.__dict__)
class QuantityTestCase(unittest.TestCase):
FORCE_NDARRAY = False
CHECK_NO_WARNING = True
@classmethod
def setUpClass(cls):
cls.ureg = UnitRegistry(force_ndarray=cls.FORCE_NDARRAY)
cls.Q_ = cls.ureg.Quantity
@contextmanager
def capture_log(self, level=logging.DEBUG):
th = TestHandler()
th.setLevel(level)
logger.addHandler(th)
if self._test_handler is not None:
l = len(self._test_handler.buffer)
yield th.buffer
if self._test_handler is not None:
self._test_handler.buffer = self._test_handler.buffer[:l]
def setUp(self):
self._test_handler = None
if self.CHECK_NO_WARNING:
self._test_handler = th = TestHandler()
th.setLevel(logging.WARNING)
logger.addHandler(th)
def tearDown(self):
if self._test_handler is not None:
buf = self._test_handler.buffer
l = len(buf)
msg = '\n'.join(record.get('msg', str(record)) for record in buf)
self.assertEqual(l, 0, msg='%d warnings raised.\n%s' % (l, msg))
def _get_comparable_magnitudes(self, first, second, msg):
if isinstance(first, _Quantity) and isinstance(second, _Quantity):
second = second.to(first)
self.assertEqual(first.units, second.units, msg=msg + 'Units are not equal.')
m1, m2 = first.magnitude, second.magnitude
elif isinstance(first, _Quantity):
self.assertTrue(first.dimensionless, msg=msg + 'The first is not dimensionless.')
first = first.to('')
m1, m2 = first.magnitude, second
elif isinstance(second, _Quantity):
self.assertTrue(second.dimensionless, msg=msg + 'The second is not dimensionless.')
second = second.to('')
m1, m2 = first, second.magnitude
else:
m1, m2 = first, second
return m1, m2
def assertQuantityEqual(self, first, second, msg=None):
if msg is None:
msg = 'Comparing %r and %r. ' % (first, second)
m1, m2 = self._get_comparable_magnitudes(first, second, msg)
if isinstance(m1, ndarray) or isinstance(m2, ndarray):
np.testing.assert_array_equal(m1, m2, err_msg=msg)
else:
unittest.TestCase.assertEqual(self, m1, m2, msg)
def assertQuantityAlmostEqual(self, first, second, rtol=1e-07, atol=0, msg=None):
if msg is None:
msg = 'Comparing %r and %r. ' % (first, second)
m1, m2 = self._get_comparable_magnitudes(first, second, msg)
if isinstance(m1, ndarray) or isinstance(m2, ndarray):
np.testing.assert_allclose(m1, m2, rtol=rtol, atol=atol, err_msg=msg)
else:
self.assertLessEqual(abs(m1 - m2), atol + rtol * abs(m2))
def testsuite():
"""A testsuite that has all the pint tests.
"""
return unittest.TestLoader().discover(os.path.dirname(__file__))
def main():
"""Runs the testsuite as command line application.
"""
try:
unittest.main()
except Exception as e:
print('Error: %s' % e)
def run():
"""Run all tests.
"""
test_runner = unittest.TextTestRunner()
test_runner.run(testsuite())
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