def test_convert_null(self):
"""null conversions to verify any conversion is undone consistently"""
pairs = [
['m', 'kg', 's'],
['mm', 'kg', 's'],
['mm', 'g', 's'],
['mm', 'Mg', 's'],
['ft', 'lbm', 's'],
['in', 'lbm', 's'],
['cm', 'kg', 's'],
]
for pair in pairs:
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
pair, pair, log)
assert xyz_scale == 1., xyz_scale
assert mass_scale == 1., mass_scale
assert time_scale == 1., time_scale
assert weight_scale == 1., weight_scale
assert gravity_scale == 1., gravity_scale
invalid_pairs = [
['cm', 'ton', 's'],
]
pair0 = ['m', 'kg', 's']
for pair in invalid_pairs:
with self.assertRaises(NotImplementedError):
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
pair, pair0, log)
with self.assertRaises(NotImplementedError):
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
pair0, pair, log)
def test_convert_units(self):
"""tests various conversions"""
# from -> to
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['in', 'lbm', 's'], ['ft', 'lbm', 's'])
assert xyz_scale == 1./12.
assert mass_scale == 1.
assert time_scale == 1.
assert weight_scale == 1., weight_scale
assert gravity_scale == 1./12., gravity_scale
wtmass = 1. / (32.2 * 12.)
wtmass_expected = 1. / (32.2)
assert allclose(wtmass/gravity_scale, wtmass_expected), 'wtmass=%s wtmass_expected=%s' % (wtmass, wtmass_expected)
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['mm', 'Mg', 's'], ['m', 'kg', 's'])
assert xyz_scale == 1./1000.
assert mass_scale == 1000.
assert time_scale == 1.
assert weight_scale == 1., weight_scale
assert gravity_scale == 1.
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['ft', 'lbm', 's'], ['m', 'kg', 's'])
assert xyz_scale == 0.3048
assert mass_scale == 0.45359237, mass_scale
assert time_scale == 1.
assert allclose(weight_scale, 4.4482216526), weight_scale
assert allclose(gravity_scale, 1/32.2), 'gravity_scale=%s 1/expected=%s' % (gravity_scale, 1/(32.2))
wtmass = 1. / (32.2)
wtmass_expected = 1.
assert allclose(wtmass/gravity_scale, wtmass_expected), 'wtmass=%s wtmass_expected=%s' % (wtmass/gravity_scale, wtmass_expected)
def test_convert_units(self):
"""tests various conversions"""
# from -> to
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['in', 'lbm', 's'], ['ft', 'lbm', 's'])
assert xyz_scale == 1./12.
assert mass_scale == 1.
assert time_scale == 1.
assert weight_scale == 1., weight_scale
assert gravity_scale == 1./12., gravity_scale
wtmass = 1. / (32.2 * 12.)
wtmass_expected = 1. / (32.2)
assert allclose(wtmass/gravity_scale, wtmass_expected), 'wtmass=%s wtmass_expected=%s' % (wtmass, wtmass_expected)
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['mm', 'Mg', 's'], ['m', 'kg', 's'])
assert xyz_scale == 1./1000.
assert mass_scale == 1000.
assert time_scale == 1.
assert weight_scale == 1., weight_scale
assert gravity_scale == 1.
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['ft', 'lbm', 's'], ['m', 'kg', 's'])
assert xyz_scale == 0.3048
assert mass_scale == 0.45359237, mass_scale
assert time_scale == 1.
assert allclose(weight_scale, 4.4482216526), weight_scale
assert allclose(gravity_scale, 1/32.2), 'gravity_scale=%s 1/expected=%s' % (gravity_scale, 1/(32.2))
wtmass = 1. / (32.2)
wtmass_expected = 1.
assert allclose(wtmass/gravity_scale, wtmass_expected), 'wtmass=%s wtmass_expected=%s' % (wtmass/gravity_scale, wtmass_expected)
def test_convert_units(self):
"""tests various conversions"""
log = SimpleLogger(level='error')
# from -> to
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['in', 'lbm', 's'], ['ft', 'lbm', 's'], log)
assert xyz_scale == 1./12.
assert mass_scale == 1.
assert time_scale == 1.
assert weight_scale == 1., weight_scale
assert gravity_scale == 1./12., gravity_scale
wtmass = 1. / (32.174 * 12.)
wtmass_expected = 1. / (32.174)
assert allclose(wtmass/gravity_scale, wtmass_expected), 'wtmass=%s wtmass_expected=%s' % (wtmass, wtmass_expected)
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['mm', 'Mg', 's'], ['m', 'kg', 's'], log)
assert xyz_scale == 1./1000.
assert mass_scale == 1000.
assert time_scale == 1.
assert weight_scale == 1., weight_scale
assert gravity_scale == 1.
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['ft', 'lbm', 's'], ['m', 'kg', 's'], log)
assert xyz_scale == 0.3048
assert mass_scale == 0.45359237, mass_scale
assert time_scale == 1.
assert allclose(weight_scale, 4.4482216526), weight_scale
assert allclose(gravity_scale, 1/32.174), 'gravity_scale=%s 1/expected=%s' % (gravity_scale, 1/(32.2))
wtmass = 1. / (32.174)
wtmass_expected = 1.
assert allclose(wtmass/gravity_scale, wtmass_expected), 'wtmass=%s wtmass_expected=%s' % (wtmass/gravity_scale, wtmass_expected)
# both are consistent systems, so wtmass=1.0
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['in', 'slinch', 's'], ['in', 'slug', 's'], log)
assert xyz_scale == 1.
assert mass_scale == 12., mass_scale
assert time_scale == 1.
assert np.allclose(weight_scale, 1.), weight_scale
assert gravity_scale == 1., gravity_scale
wtmass = 1.
wtmass_expected = 1.
assert allclose(wtmass/gravity_scale, wtmass_expected), 'wtmass=%s wtmass_expected=%s' % (wtmass, wtmass_expected)
# both are consistent systems, so wtmass=1.0
xyz_scale, mass_scale, time_scale, weight_scale, gravity_scale = get_scale_factors(
['ft', 'lbm', 's'], ['ft', 'slug', 's'], log)
assert xyz_scale == 1.
assert np.allclose(mass_scale, 1. / 32.174), 'mass_scale=%s expected=%s' % (mass_scale, 1/32.174)
assert time_scale == 1.
assert np.allclose(weight_scale, 1.), 'weight_scale=%s expected=%s' % (weight_scale, 1.)
assert gravity_scale == 1/32.174, 'gravity_scale=%s expected=%s' % (gravity_scale, 1./32.174)
wtmass = 1. / 32.174
wtmass_expected = 1.
assert allclose(wtmass/gravity_scale, wtmass_expected), 'wtmass=%s wtmass_expected=%s' % (wtmass, wtmass_expected)