from sfepy.base.base import assert_
import sfepy.base.testing as tst
def _cmp(s1, s2):
s1 = s1.split()
s2 = s2.split()
v1, t1 = float(s1[0]), s1[1:]
v2, t2 = float(s2[0]), s2[1:]
return (abs(v1 - v2) < (1e-15 * abs(v1))) and (t1 == t2)
[docs]def test_units():
from sfepy.mechanics.units import Unit, Quantity, sm
if sm is None:
tst.report('cannot import sympy, skipping')
return
units = ['m', 's', 'kg', 'C']
tst.report('units:', units)
unit_set = [Unit(key) for key in units]
q1 = Quantity('stress', unit_set)
tst.report(q1.name, ':', q1())
assert_(_cmp(q1(), '1.0 Pa'))
assert_(_cmp(q1('c'), '100.0 cPa'))
q2 = Quantity('force', unit_set)
tst.report(q2.name, ':', q2())
assert_(_cmp(q2(), '1.0 Newton'))
assert_(_cmp(q2('d'), '0.1 dNewton'))
q3 = Quantity('energy', unit_set)
tst.report(q3.name, ':', q3())
assert_(_cmp(q3(), '1.0 J'))
assert_(_cmp(q3('mu'), '1000000.0 muJ'))
units = ['mm', 's', 'g', 'C']
tst.report('units:', units)
unit_set = [Unit(key) for key in units]
q1 = Quantity('stress', unit_set)
tst.report(q1.name, ':', q1())
assert_(_cmp(q1(), '1.0 Pa'))
q2 = Quantity('force', unit_set)
tst.report(q2.name, ':', q2())
assert_(_cmp(q2(), '1.0 muNewton'))
q3 = Quantity('energy', unit_set)
tst.report(q3.name, ':', q3())
assert_(_cmp(q3(), '1.0 nJ'))
units = ['cm', 'ms', 'kg', 'kC']
tst.report('units:', units)
unit_set = [Unit(key) for key in units]
q1 = Quantity('stress', unit_set)
tst.report(q1.name, ':', q1())
assert_(_cmp(q1(), '0.1 GPa'))
q2 = Quantity('force', unit_set)
tst.report(q2.name, ':', q2())
assert_(_cmp(q2(), '10.0 kNewton'))
q3 = Quantity('energy', unit_set)
tst.report(q3.name, ':', q3())
assert_(_cmp(q3(), '0.1 kJ'))
q4 = Quantity('thermal_expandability', unit_set)
tst.report(q4.name, ':', q4())
assert_(_cmp(q4(), '0.1 MPa / C'))
assert_(_cmp(q4('G'), '0.0001 GPa / C'))
assert_(_cmp(q4('M'), '0.1 MPa / C'))
assert_(_cmp(q4('k'), '100.0 kPa / C'))
assert_(_cmp(q4('d'), '10000.0 dPa / C'))
assert_(_cmp(q4(''), '100000.0 Pa / C'))
units = ['m', 's', 'g', 'C']
tst.report('units:', units)
unit_set = [Unit(key) for key in units]
q4 = Quantity('thermal_expandability', unit_set)
tst.report(q4.name, ':', q4())
assert_(_cmp(q4(), '1.0 mPa / C'))
assert_(_cmp(q4('k'), str(0.000001) + ' kPa / C'))
assert_(_cmp(q4('d'), '0.0001 dPa / C'))
assert_(_cmp(q4(''), '0.001 Pa / C'))
assert_(_cmp(q4('c'), '0.1 cPa / C'))
assert_(_cmp(q4('m'), '1.0 mPa / C'))
assert_(_cmp(q4('mu'), '1000.0 muPa / C'))
assert_(_cmp(q4('n'), '1000000.0 nPa / C'))
[docs]def test_consistent_sets():
from sfepy.mechanics.units import get_consistent_unit_set, sm
if sm is None:
tst.report('cannot import sympy, skipping')
return True
u_sets = {
('m', 's', 'kg', 'C') : {'force' : '1.0 Newton',
'stress' : '1.0 Pa',
'energy' : '1.0 J',
'thermal_expandability' : '1.0 Pa / C'},
('mm', 's', 'kg', 'C') : {'force' : '1.0 mNewton',
'stress' : '1.0 kPa',
'energy' : '1.0 muJ',
'thermal_expandability' : '1.0 kPa / C'},
('mm', 's', 'g', 'C') : {'force' : '1.0 muNewton',
'stress' : '1.0 Pa',
'energy' : '1.0 nJ',
'thermal_expandability' : '1.0 Pa / C'},
}
ok = True
for unit_set, true_derived_units in u_sets.items():
tst.report('units:', unit_set)
derived_units = get_consistent_unit_set(*unit_set)
for key, true_val in true_derived_units.items():
val = derived_units[key]
_ok = _cmp(true_val, val)
tst.report('%s: %s == %s -> %s' % (key, true_val, val, _ok))
ok = ok and _ok
assert_(ok)