def test_get_base_units_different_exponent(self):
sysname = 'mysys3'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
lines = ['@system %s using test-imperial' % sysname,
'pint:meter',
]
s = System.from_lines(lines, ureg.get_base_units, g._groups_systems)
# base_factor, destination_units
c = ureg.get_base_units('inch', system=sysname)
self.assertAlmostEqual(c[0], 0.326, places=3)
self.assertEqual(c[1], {'pint': 1./3})
c = ureg.get_base_units('cm', system=sysname)
self.assertAlmostEqual(c[0], 0.1283, places=3)
self.assertEqual(c[1], {'pint': 1./3})
c = ureg.get_base_units('inch**2', system=sysname)
self.assertAlmostEqual(c[0], 0.326**2, places=3)
self.assertEqual(c[1], {'pint': 2./3})
c = ureg.get_base_units('cm**2', system=sysname)
self.assertAlmostEqual(c[0], 0.1283**2, places=3)
self.assertEqual(c[1], {'pint': 2./3})
def test_get_base_units_different_exponent(self):
sysname = 'mysys3'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
lines = [
'@system %s using test-imperial' % sysname,
'pint:meter',
]
s = System.from_lines(lines, ureg.get_base_units, g._groups_systems)
# base_factor, destination_units
c = ureg.get_base_units('inch', system=sysname)
self.assertAlmostEqual(c[0], 0.326, places=3)
self.assertEqual(c[1], {'pint': 1. / 3})
c = ureg.get_base_units('cm', system=sysname)
self.assertAlmostEqual(c[0], 0.1283, places=3)
self.assertEqual(c[1], {'pint': 1. / 3})
c = ureg.get_base_units('inch**2', system=sysname)
self.assertAlmostEqual(c[0], 0.326**2, places=3)
self.assertEqual(c[1], {'pint': 2. / 3})
c = ureg.get_base_units('cm**2', system=sysname)
self.assertAlmostEqual(c[0], 0.1283**2, places=3)
self.assertEqual(c[1], {'pint': 2. / 3})
def test_members_group(self):
lines = ['@system mk',
'meter',
'kilogram',
]
d = {}
root = self._build_root(d)
root.add_units('second')
s = System.from_lines(lines, lambda x: x, d)
self.assertEqual(s.members, frozenset(['second']))
def test_simple_using(self):
lines = ['@system mks using g1',
'meter',
'kilogram',
'second',
]
d = {}
root = self._build_root(d)
s = System.from_lines(lines, lambda x: x, d)
s._used_groups = set(['root', 'g1'])
def test_members_group(self):
lines = [
'@system mk',
'meter',
'kilogram',
]
d = {}
root = self._build_root(d)
root.add_units('second')
s = System.from_lines(lines, lambda x: x, d)
self.assertEqual(s.members, frozenset(['second']))
def test_simple_using(self):
lines = [
'@system mks using g1',
'meter',
'kilogram',
'second',
]
d = {}
root = self._build_root(d)
s = System.from_lines(lines, lambda x: x, d)
s._used_groups = set(['root', 'g1'])
def test_get_compatible_units(self):
sysname = 'mysys1'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
lines = ['@system %s using test-imperial' % sysname,
'inch',
]
s = System.from_lines(lines, lambda x: x, g._groups_systems)
c = ureg.get_compatible_units('meter', sysname)
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
def test_get_compatible_units(self):
sysname = 'mysys1'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
lines = [
'@system %s using test-imperial' % sysname,
'inch',
]
s = System.from_lines(lines, lambda x: x, g._groups_systems)
c = ureg.get_compatible_units('meter', sysname)
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
def test_get_base_units_relation(self):
sysname = 'mysys4'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
lines = ['@system %s using test-imperial' % sysname,
'mph:meter',
]
s = System.from_lines(lines, ureg.get_base_units, g._groups_systems)
# base_factor, destination_units
c = ureg.get_base_units('inch', system=sysname)
self.assertAlmostEqual(c[0], 0.0568, places=3)
self.assertEqual(c[1], {'mph': 1, 'second': 1})
c = ureg.get_base_units('kph', system=sysname)
self.assertAlmostEqual(c[0], .6214, places=4)
self.assertEqual(c[1], {'mph': 1})
def test_get_base_units(self):
sysname = 'mysys2'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
lines = ['@system %s using test-imperial' % sysname,
'inch',
]
s = System.from_lines(lines, ureg.get_base_units, g._groups_systems)
# base_factor, destination_units
c = ureg.get_base_units('inch', system=sysname)
self.assertAlmostEqual(c[0], 1)
self.assertEqual(c[1], {'inch': 1})
c = ureg.get_base_units('cm', system=sysname)
self.assertAlmostEqual(c[0], 1./2.54)
self.assertEqual(c[1], {'inch': 1})
def test_get_base_units_relation(self):
sysname = 'mysys4'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
lines = [
'@system %s using test-imperial' % sysname,
'mph:meter',
]
s = System.from_lines(lines, ureg.get_base_units, g._groups_systems)
# base_factor, destination_units
c = ureg.get_base_units('inch', system=sysname)
self.assertAlmostEqual(c[0], 0.0568, places=3)
self.assertEqual(c[1], {'mph': 1, 'second': 1})
c = ureg.get_base_units('kph', system=sysname)
self.assertAlmostEqual(c[0], .6214, places=4)
self.assertEqual(c[1], {'mph': 1})
def test_get_base_units(self):
sysname = 'mysys2'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
lines = [
'@system %s using test-imperial' % sysname,
'inch',
]
s = System.from_lines(lines, ureg.get_base_units, g._groups_systems)
# base_factor, destination_units
c = ureg.get_base_units('inch', system=sysname)
self.assertAlmostEqual(c[0], 1)
self.assertEqual(c[1], {'inch': 1})
c = ureg.get_base_units('cm', system=sysname)
self.assertAlmostEqual(c[0], 1. / 2.54)
self.assertEqual(c[1], {'inch': 1})
