Source code for sfepy.tests.test_units

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)