Function test_float_convert

tests/test_builtin_casters.py:327–360

(doc)

def test_float_convert(doc):
    class Int:
        def __int__(self):
            return -5

    class Index:
        def __index__(self) -> int:
            return -7

    class Float:
        def __float__(self):
            return 41.45

    convert, noconvert = m.float_passthrough, m.float_passthrough_noconvert
    assert (
        doc(convert)
        == "float_passthrough(arg0: typing.SupportsFloat | typing.SupportsIndex) -> float"
    )
    assert doc(noconvert) == "float_passthrough_noconvert(arg0: float) -> float"

    def requires_conversion(v):
        pytest.raises(TypeError, noconvert, v)

    def cant_convert(v):
        pytest.raises(TypeError, convert, v)

    requires_conversion(Float())
    requires_conversion(Index())
    assert pytest.approx(convert(Float())) == 41.45
    assert pytest.approx(convert(Index())) == -7.0
    assert isinstance(convert(Float()), float)
    assert pytest.approx(convert(3)) == 3.0
    requires_conversion(3)
    cant_convert(Int())


def test_numpy_int_convert():