def test_hw06_prob01_ut01(self):
print(
'\n***** CS3430: S20: HW06: Problem 01: Unit Test 01 ************')
rslt = drv.drv_const(maker.make_const(1.0))
err = 0.0001
assert isinstance(rslt, const)
assert abs(rslt.get_val() - 0.0) <= err
rslt = drv.drv_const(maker.make_const(153.0))
assert isinstance(rslt, const)
assert abs(rslt.get_val() - 0.0) <= err
print('CS 3430: S20: HW06: Problem 01: Unit Test 01: pass')
def parse_elt(elt):
# let's make sure that elt is a string.
assert isinstance(elt, str)
elt = elt.split('^')
prod = maker.make_prod(maker.make_const(float(elt[0][:-1])),
maker.make_pwr(elt[0][-1], float(elt[1])))
return prod
def drv_prod(expr):
m1 = expr.get_mult1()
m2 = expr.get_mult2()
assert isinstance(m1, const)
assert isinstance(m2, pwr)
pr = drv.drv_pwr(m2)
return maker.make_prod(
maker.make_const(m1.get_val() * m2.get_deg().get_val()), pr)
def drv_pwr(expr):
b = expr.get_base()
d = expr.get_deg()
assert (isinstance(b, pwr) and b.get_deg().get_val() == 1.0) or \
(isinstance(b, var))
assert isinstance(d, const)
return maker.make_prod(maker.make_const(1),
maker.make_pwr(b.get_name(),
d.get_val() - 1))
def drv_const(expr):
return maker.make_const(0)