import abc

from abc import ABC

from types import ModuleType

import numpy.testing as npt

from xarray.namedarray._typing import duckarray

class DuckArrayTestMixin(ABC):

@property

@abc.abstractmethod

def xp() -> ModuleType:

pass

@staticmethod

def array_type(op: str) -> type[duckarray]:

pass

@staticmethod

@abc.abstractmethod

def array_strategy_fn(*, shape, dtype):

raise NotImplementedError("has to be overridden")

@staticmethod

def assert_equal(a, b):

npt.assert_equal(a, b)

def assert_dimension_indexers_equal(self, a, b):

assert type(a) is type(b), f"types don't match: {type(a)} vs {type(b)}"

if isinstance(a, dict):

assert a.keys() == b.keys(), f"Different dimensions: {list(a)} vs {list(b)}"

assert all(

self.xp.all(self.xp.equal(a[k], b[k])) for k in a

), "Differing indexers"

else:

npt.assert_equal(a, b)