| from scipy.constants import find, value, ConstantWarning, c, speed_of_light |
| from numpy.testing import (assert_equal, assert_, assert_almost_equal, |
| suppress_warnings) |
| import scipy.constants._codata as _cd |
|
|
|
|
| def test_find(): |
| keys = find('weak mixing', disp=False) |
| assert_equal(keys, ['weak mixing angle']) |
|
|
| keys = find('qwertyuiop', disp=False) |
| assert_equal(keys, []) |
|
|
| keys = find('natural unit', disp=False) |
| assert_equal(keys, sorted(['natural unit of velocity', |
| 'natural unit of action', |
| 'natural unit of action in eV s', |
| 'natural unit of mass', |
| 'natural unit of energy', |
| 'natural unit of energy in MeV', |
| 'natural unit of momentum', |
| 'natural unit of momentum in MeV/c', |
| 'natural unit of length', |
| 'natural unit of time'])) |
|
|
|
|
| def test_basic_table_parse(): |
| c_s = 'speed of light in vacuum' |
| assert_equal(value(c_s), c) |
| assert_equal(value(c_s), speed_of_light) |
|
|
|
|
| def test_basic_lookup(): |
| assert_equal('%d %s' % (_cd.c, _cd.unit('speed of light in vacuum')), |
| '299792458 m s^-1') |
|
|
|
|
| def test_find_all(): |
| assert_(len(find(disp=False)) > 300) |
|
|
|
|
| def test_find_single(): |
| assert_equal(find('Wien freq', disp=False)[0], |
| 'Wien frequency displacement law constant') |
|
|
|
|
| def test_2002_vs_2006(): |
| assert_almost_equal(value('magn. flux quantum'), |
| value('mag. flux quantum')) |
|
|
|
|
| def test_exact_values(): |
| |
| with suppress_warnings() as sup: |
| sup.filter(ConstantWarning) |
| for key in _cd.exact_values: |
| assert_((_cd.exact_values[key][0] - value(key)) / value(key) == 0) |
|
|
