def test_bitnum_overflow():
with pytest.raises(InvalidNumericType, match=r"overflow"):
Bitnum("0b10", 1, False)
with pytest.raises(InvalidNumericType, match=r"overflow"):
Bitnum("-2", 1, True)
with pytest.raises(InvalidNumericType, match=r"overflow"):
Bitnum("0x2", 1, False)
def convert(x):
if not is_fp:
return Bitnum(x, **shape[k]).base_64_encode()
try:
return FixedPoint(x, **shape[k]).base_64_encode()
except InvalidNumericType as error:
if round_float_to_fixed:
# Only round if it is not already representable.
fractional_width = width - int_width
x = float_to_fixed(float(x), fractional_width)
x = str(x)
return FixedPoint(x, **shape[k]).base_64_encode()
else:
raise error
def bitnum_round_trip(bit_string: str) -> Bitnum:
# Round-trips the bitnum conversion.
bin = Bitnum(f"0b{bit_string}", width, is_signed).str_value()
hex = Bitnum(f"0x{hex_string}", width, is_signed).str_value()
assert bin == hex
return Bitnum(bin, width, is_signed)
def test_non_string_initialization():
with pytest.raises(InvalidNumericType, match=r"string"):
Bitnum(16, 5, False)
with pytest.raises(InvalidNumericType, match=r"string"):
FixedPoint(0.5, 2, 1, False)
def test_empty_string():
with pytest.raises(InvalidNumericType, match=r"non-empty string"):
Bitnum("", 2, False)
with pytest.raises(InvalidNumericType, match=r"non-empty string"):
FixedPoint("", 2, 1, False)
def test_unsigned_negative_number():
with pytest.raises(InvalidNumericType, match=r"negative value"):
FixedPoint("-0.5", 2, 1, False)
with pytest.raises(InvalidNumericType, match=r"negative value"):
Bitnum("-1", 2, False)