from griffe.tests import temporary_visited_module

code = """
from dataclasses import dataclass, field

@dataclass
class PointA:
    x: float
    y: float
    z: float = field(init=False)

@dataclass(init=False)
class PointB:
    x: float
    y: float

@dataclass(init=False)
class PointC:
    x: float
    y: float = field(init=True)  # init=True has no effect
"""

with temporary_visited_module(code) as module:
    paramsA = module["PointA"].parameters
    paramsB = module["PointB"].parameters
    paramsC = module["PointC"].parameters

    assert "z" not in paramsA
    assert "x" not in paramsB and "y" not in paramsB
    assert "x" not in paramsC and "y" not in paramsC

def no_init(default: T) -> T:
    """
    Set default value of a dataclass field that will not be __init__ed
    """
    return field(init=False, default=default)

@dataclass
class Point:
    x: float
    y: float = no_init(0)  # y is not a parameter