def test_simple_ratio(self):
f23 = Fraction(2, 3)
assert to_fraction(0.66666666) == f23
for i in f23, '2/3', 2 / 3, '2 / 3', 0.66666666, 0.6666666:
assert to_fraction(i) == f23
assert to_fraction(0.666666) == Fraction(333333, 500000)
assert to_fraction(0.66666) == Fraction(33333, 50000)
def test_fractions(self):
MAX = 10000 # Set to 0 for a big test!
for pp, p in more_itertools.windowed(gen_primes(), 2):
if MAX and p >= MAX:
break
floating = to_fraction(p / pp)
fractional = Fraction(p, pp)
if pp > 1000000:
assert floating == Fraction(766692, 766669)
assert fractional == Fraction(1000033, 1000003)
break
else:
assert floating == fractional
pp = p
def test_to_samples(self):
assert to_samples('2', 44100) == 88200
assert to_samples('2.3', 44100) == to_fraction(2.3) * 44100
assert to_samples('300s', 44100) == 300 * 44100
assert to_samples('300ms', 44100) == 13230
assert to_samples('300 samples', 44100) == 300
def test_type_error(self):
with self.assertRaises(TypeError) as m:
to_fraction(set())
assert m.exception.args == (
"Do not understand set() of type <class 'set'>",
)
def test_empty(self):
for x in 0, 0.0:
assert to_fraction(x) == Fraction()
def test_value_error(self):
with self.assertRaises(ValueError) as m:
to_fraction('junk')
assert m.exception.args == (
"could not convert string to float: 'junk'",
)