def test_invalid():
with pytest.raises(TypeError, match="next_raw must be"):
UserBitGenerator.from_cfunc("next_raw", "next_64", "next_32",
"next_double", "state")
with pytest.raises(TypeError, match="next_raw must be"):
UserBitGenerator.from_ctypes("next_raw", "next_64", "next_32",
"next_double", "state")
def test_32():
def next_raw(vp):
return np.iinfo(np.uint32).max
bg = UserBitGenerator(next_raw, 32)
assert bg.random_raw() == np.iinfo(np.uint32).max
gen = Generator(bg)
assert gen.integers(0, 2**64, dtype=np.uint64) == np.iinfo(np.uint64).max
np.testing.assert_allclose(gen.random(), (2**53 - 1) / (2**53), rtol=1e-14)
assert "UserBitGenerator(Python)" in repr(bg)
def test_smoke(python_pcg):
bg = UserBitGenerator(python_pcg, 64)
gen = Generator(bg)
assert isinstance(gen.random(), float)
assert isinstance(gen.standard_normal(dtype=np.float32), float)
assert isinstance(gen.integers(0, 2**32, dtype=np.uint32), np.integer)
assert isinstance(gen.integers(0, 2**64, dtype=np.uint64), np.integer)
def test_no_setter_getter(split_mix):
bgf = UserBitGenerator.from_cfunc(
split_mix.next_raw,
split_mix.next_64,
split_mix.next_32,
split_mix.next_double,
split_mix.state_address,
)
gen = Generator(bgf)
gen.standard_normal(size=10)
gen.standard_normal(size=10, dtype=np.float32)
gen.integers(0, 2**63, dtype=np.uint64, size=10)
with pytest.raises(NotImplementedError):
bgf.state
with pytest.raises(NotImplementedError):
bgf.state = {"apple"}
bgf = UserBitGenerator.from_cfunc(
split_mix.next_raw,
split_mix.next_64,
split_mix.next_32,
split_mix.next_double,
split_mix.state_address,
state_getter=split_mix.state_getter,
)
assert isinstance(bgf.state, dict)
with pytest.raises(NotImplementedError):
bgf.state = {"apple"}
bgf = UserBitGenerator.from_cfunc(
split_mix.next_raw,
split_mix.next_64,
split_mix.next_32,
split_mix.next_double,
split_mix.state_address,
state_setter=split_mix.state_setter,
)
bgf.state = split_mix.state_getter()
def test_cfunc_smoke(split_mix):
bgf = UserBitGenerator.from_cfunc(
split_mix.next_raw,
split_mix.next_64,
split_mix.next_32,
split_mix.next_double,
split_mix.state_address,
state_getter=split_mix.state_getter,
state_setter=split_mix.state_setter,
)
gen = Generator(bgf)
gen.standard_normal(size=10)
assert bgf.state == split_mix.state_getter()
gen.standard_normal(dtype=np.float32)
assert bgf.state == split_mix.state_getter()
gen.integers(0, 2**63, dtype=np.uint64, size=10)
assert bgf.state == split_mix.state_getter()
old_state = bgf.state.copy()
old_state["state"] = 1
bgf.state = old_state
assert bgf.state == split_mix.state_getter()
def pcg_python(request):
bit_gen = _PCG64(PCG64_INITIAL_STATE["state"]["state"],
PCG64_INITIAL_STATE["state"]["inc"])
return UserBitGenerator(bit_gen.next_64(), 64, next_32=bit_gen.next_32())