def test_round_trip(self):
test_data = [struct.unpack('<d', os.urandom(8))[0]
for _ in range(1000)]
for value in test_data:
round_tripped = bin_to_double(double_to_bin(value))
if math.isnan(value):
assert math.isnan(round_tripped)
else:
assert round_tripped == value
def test_round_trip(self):
test_data = [
_pad_to(bin(struct.unpack('<Q', os.urandom(8))[0]), 64)
for _ in range(1000)]
for value in test_data:
frombin = bin_to_double(value)
if math.isnan(frombin):
continue
round_tripped = double_to_bin(frombin)
assert round_tripped == value
def test_negative_inf(self):
result = bin_to_double('0b1111111111110000000000000000000000000000000000000000000000000000')
assert math.isinf(result)
assert result < 0
def test_inf(self):
result = bin_to_double('0b0111111111110000000000000000000000000000000000000000000000000000')
assert math.isinf(result)
assert result > 0
def test_nan(self):
result = bin_to_double('0b0111111111110000000000000000000000000000000000000000000000000001')
assert math.isnan(result)
def test_negative_zero(self):
expected = -0.0
result = bin_to_double('0b1000000000000000000000000000000000000000000000000000000000000000')
assert result == expected
def test_zero(self):
expected = 0.0
result = bin_to_double('0b0000000000000000000000000000000000000000000000000000000000000000')
assert result == expected
def test_nan(self):
round_tripped = bin_to_double(double_to_bin(float('nan')))
assert math.isnan(round_tripped)
