from pytest import approx, fail
|
|
from polynomial import Polynomial
|
|
def test_construct_polynomial_error():
|
coe = [3.5, -4.6, 0] # 3.5 - 4.6x + 0x^2
|
try:
|
p = Polynomial(coe) #
|
except RuntimeError as ex:
|
print(ex)
|
pass
|
|
def test_construct_quadratic_polynomial():
|
coe = [3, -4.5, 1.5] # 3 - 4.5x + 1.5x^2
|
p = Polynomial(coe)
|
assert p.getExponent(0) == 3
|
#e = p[0]
|
|
def test_get_coefficient():
|
coe = [3, -4.5, 1.5] # 3 - 4.5x + 1.5x^2
|
p = Polynomial(coe)
|
for idx in range(0, len(coe)):
|
assert p[idx] == coe[idx]
|
|
def test_get_coefficient_bad_argument():
|
coe = [3, -4.5, 1.5] # 3 - 4.5x + 1.5x^2
|
p = Polynomial(coe)
|
try:
|
p[-1]
|
fail("Expected an exception")
|
except IndexError as ex:
|
pass
|
|
|
def test_eval():
|
coe = [3, 2, 1] # 3 + 2x + x^2
|
p = Polynomial(coe)
|
w = p.eval(0) #
|
assert w == 3
|
w = p.eval(1)
|
assert w == 6
|
w = p.eval(-1)
|
|
def test_eval_per_operator():
|
coe = [3, 2, 1] # 3 + 2x + x^2
|
p = Polynomial(coe)
|
w = p(-4.5)
|
assert w == approx(14.25)
|
|
def test_eval_per_operator_with_str_argument():
|
coe = [3, 2, 1] # 3 + 2x + x^2
|
p = Polynomial(coe)
|
try:
|
w = p("hello world")
|
fail("Bad argument")
|
except TypeError as ex:
|
#assert ex.message == "Bad argument"
|
print(ex)
|
|
|
|
def test_approximate_eval():
|
coe = [3, 2, 1] # 3 + 2x + x^2
|
p = Polynomial(coe)
|
w = p.eval(1.25)
|
assert w == approx(7.0625)
|
w = p.eval(1/3)
|
assert w == approx(3.77777777)
|
|
|
|
|
