def test_log(trig_cls, trig_var):
f1 = AD.log(trig_cls)
f2 = AD.log(trig_var)
assert f1.func_val == np.log(np.pi / 4)
assert f1.partial_dict['x1'] == 1 / (np.pi / 4)
assert f2 == np.log(np.pi / 4)
def test_misc_funcs():
ar_f = AD.from_array([1, 4], 'f')
assert AD.sqrt(ar_f)[1].func_val == 2
assert AD.sqrt(ar_f)[1].partial_dict['f_1'] == 0.25
assert AD.log(ar_f)[0].func_val == 0
assert AD.log(ar_f)[1].partial_dict['f_1'] == 0.25
assert np.round(AD.sinh(ar_f)[0].func_val,
7) == np.round(1.1752011936438014, 7)
assert np.round(AD.sinh(ar_f)[1].partial_dict['f_1'],
7) == np.round(27.308232836016487, 7)
assert np.round(AD.cosh(ar_f)[0].func_val,
7) == np.round(1.5430806348152437, 7)
assert np.round(AD.cosh(ar_f)[1].partial_dict['f_1'],
7) == np.round(27.289917197127753, 7)
assert np.round(AD.cosh(1), 7) == np.round(1.5430806348152437, 7)
assert np.round(AD.tanh(ar_f)[0].func_val,
7) == np.round(0.7615941559557649, 7)
assert np.round(AD.tanh(ar_f)[1].partial_dict['f_1'],
7) == np.round(0.001340950683025897, 7)
def test_improper_logbase():
x = AD(3)
with pytest.raises(Exception):
AD.log(x, base = AD(4))