Fix catching of warnings during testing.

pint/constants_en.txt

@@ -15,7 +15,7 @@ planck_constant = 6.62606957e-34 J s = h
 hbar = planck_constant / (2 * pi) = ħ
 
 # 0.000 80 e-11
-newtonian_constant_of_gravitation = 6.67384e-11 m^3 kg^-1 s^-2 = G
+newtonian_constant_of_gravitation = 6.67384e-11 m^3 kg^-1 s^-2
 
 # 0.000 000 035 e-19
 # elementary_charge = 1.602176565e-19 C = e

pint/default_en.txt

@@ -72,7 +72,7 @@ US_survey_acre = 160 * rod ** 2
 esu = 1 * erg**0.5 * centimeter**0.5 = statcoulombs = statC = franklin = Fr
 esu_per_second = 1 * esu / second = statampere
 ampere_turn = 1 * A
-gilbert = 10 / (4 * pi ) * ampere_turn = G
+gilbert = 10 / (4 * pi ) * ampere_turn
 coulomb = ampere * second = C
 volt = joule / coulomb = V
 farad = coulomb / volt = F

pint/testsuite/__init__.py

@@ -9,6 +9,7 @@ from pint.compat import ndarray, unittest
 
 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")
@@ -18,6 +19,22 @@ logger.addHandler(h)
 logger.setLevel(logging.DEBUG)
 
 
+class TestHandler(BufferingHandler):
+    def __init__(self):
+        # 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.
+        BufferingHandler.__init__(self, 0)
+
+    def shouldFlush(self):
+        return False
+
+    def emit(self, record):
+        self.buffer.append(record.__dict__)
+
+
 class TestCase(unittest.TestCase):
 
     @classmethod

pint/testsuite/test_contexts.py

@@ -8,28 +8,11 @@ from collections import defaultdict
 from pint import UnitRegistry
 from pint.context import Context, _freeze
 from pint.unit import UnitsContainer
-from pint.testsuite import TestCase
+from pint.testsuite import TestCase, TestHandler
 from pint.compat import unittest
 
 from pint import logger
 
-from logging.handlers import BufferingHandler
-
-class TestHandler(BufferingHandler):
-    def __init__(self):
-        # 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.
-        BufferingHandler.__init__(self, 0)
-
-    def shouldFlush(self):
-        return False
-
-    def emit(self, record):
-        self.buffer.append(record.__dict__)
-
 def add_ctxs(ureg):
     a, b = UnitsContainer({'[length]': 1}), UnitsContainer({'[time]': -1})
     d = Context('lc')

pint/testsuite/test_unit.py

@@ -4,7 +4,6 @@ from __future__ import division, unicode_literals, print_function, absolute_impo
 
 import math
 import copy
-import warnings
 import operator as op
 
 from pint.unit import (ScaleConverter, OffsetConverter, UnitsContainer,
@@ -13,7 +12,7 @@ from pint.unit import (ScaleConverter, OffsetConverter, UnitsContainer,
                        LazyRegistry, ParserHelper)
 from pint import DimensionalityError, UndefinedUnitError
 from pint.compat import u, unittest
-from pint.testsuite import TestCase
+from pint.testsuite import TestCase, logger, TestHandler
 
 
 class TestConverter(unittest.TestCase):
@@ -434,6 +433,21 @@ class TestRegistry(TestCase):
         self.assertEqual(t.to('kelvin').magnitude, self.ureg._units['degF'].converter.to_reference(8.))
         self.assertEqual(dt.to('delta_kelvin').magnitude, self.ureg._units['delta_degF'].converter.to_reference(8.))
 
+    def test_redefinition(self):
+        d = UnitRegistry().define
+
+        th = TestHandler()
+        logger.addHandler(th)
+        d('meter = [fruits]')
+        d('kilo- = 1000')
+        d('[speed] = [vegetables]')
+
+        # aliases
+        d('bla = 3.2 meter = inch')
+        d('myk- = 1000 = kilo-')
+
+        self.assertEqual(len(th.buffer), 5)
+
 
 class TestEquivalents(TestCase):
 
@@ -496,20 +510,6 @@ class TestEquivalents(TestCase):
         self.assertEqual(ureg.parse_units(''), UnitsContainer())
         self.assertRaises(ValueError, ureg.parse_units, '2 * meter')
 
-    def test_redefinition(self):
-        d = UnitRegistry().define
-
-        with warnings.catch_warnings(record=True) as w:
-            d('meter = [time]')
-            d('kilo- = 1000')
-            d('[speed] = [length]')
-
-            # aliases
-            d('bla = 3.2 meter = inch')
-            d('myk- = 1000 = kilo-')
-
-            self.assertEqual(len(w), 5)
-
 
 class TestRegistryWithDefaultRegistry(TestRegistry):