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import doctest
import logging
import math
import os
import unittest
from contextlib import contextmanager
from logging.handlers import BufferingHandler
from pint import Quantity, UnitRegistry, logger
from pint.compat import ndarray, np
from pint.testsuite.helpers import PintOutputChecker
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 BaseTestCase(unittest.TestCase):
CHECK_NO_WARNING = True
@contextmanager
def capture_log(self, level=logging.DEBUG):
th = TestHandler()
th.setLevel(level)
logger.addHandler(th)
if self._test_handler is not None:
buflen = len(self._test_handler.buffer)
yield th.buffer
if self._test_handler is not None:
self._test_handler.buffer = self._test_handler.buffer[:buflen]
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
msg = "\n".join(record.get("msg", str(record)) for record in buf)
self.assertEqual(len(buf), 0, msg=f"{len(buf)} warnings raised.\n{msg}")
class QuantityTestCase(BaseTestCase):
FORCE_NDARRAY = False
@classmethod
def setUpClass(cls):
cls.ureg = UnitRegistry(force_ndarray=cls.FORCE_NDARRAY)
cls.Q_ = cls.ureg.Quantity
cls.U_ = cls.ureg.Unit
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)
elif math.isnan(m1):
self.assertTrue(math.isnan(m2), msg)
elif math.isnan(m2):
self.assertTrue(math.isnan(m1), msg)
else:
self.assertEqual(m1, m2, msg)
def assertQuantityAlmostEqual(self, first, second, rtol=1e-07, atol=0, msg=None):
if msg is None:
try:
msg = "Comparing %r and %r. " % (first, second)
except TypeError:
try:
msg = "Comparing %s and %s. " % (first, second)
except Exception:
msg = "Comparing"
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)
elif math.isnan(m1):
self.assertTrue(math.isnan(m2), msg)
elif math.isnan(m2):
self.assertTrue(math.isnan(m1), msg)
else:
self.assertLessEqual(abs(m1 - m2), atol + rtol * abs(m2), msg=msg)
class CaseInsensitveQuantityTestCase(QuantityTestCase):
@classmethod
def setUpClass(cls):
cls.ureg = UnitRegistry(case_sensitive=False)
cls.Q_ = cls.ureg.Quantity
cls.U_ = cls.ureg.Unit
def testsuite():
"""A testsuite that has all the pint tests."""
suite = unittest.TestLoader().discover(os.path.dirname(__file__))
from pint.compat import HAS_NUMPY, HAS_UNCERTAINTIES
# TESTING THE DOCUMENTATION requires pyyaml, serialize, numpy and uncertainties
if HAS_NUMPY and HAS_UNCERTAINTIES:
try:
import serialize # noqa: F401
import yaml # noqa: F401
add_docs(suite)
except ImportError:
pass
return suite
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.
:return: a :class:`unittest.TestResult` object
Parameters
----------
Returns
-------
"""
test_runner = unittest.TextTestRunner()
return test_runner.run(testsuite())
_GLOBS = {
"wrapping.rst": {
"pendulum_period": lambda length: 2 * math.pi * math.sqrt(length / 9.806650),
"pendulum_period2": lambda length, swing_amplitude: 1.0,
"pendulum_period_maxspeed": lambda length, swing_amplitude: (1.0, 2.0),
"pendulum_period_error": lambda length: (1.0, False),
}
}
def add_docs(suite):
"""Add docs to suite
Parameters
----------
suite :
Returns
-------
"""
docpath = os.path.join(os.path.dirname(__file__), "..", "..", "docs")
docpath = os.path.abspath(docpath)
if os.path.exists(docpath):
checker = PintOutputChecker()
for name in (name for name in os.listdir(docpath) if name.endswith(".rst")):
file = os.path.join(docpath, name)
suite.addTest(
doctest.DocFileSuite(
file,
module_relative=False,
checker=checker,
globs=_GLOBS.get(name, None),
)
)
def test_docs():
suite = unittest.TestSuite()
add_docs(suite)
runner = unittest.TextTestRunner()
return runner.run(suite)
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