"""Unit tests for the Platform module."""

from __future__ import annotations

from typing import Generator

import pytest

from pythonnative.platform import Platform, _set_platform_for_test, get_platform

@pytest.fixture(autouse=True)

def _reset_platform() -> Generator[None, None, None]:

"""Reset Platform after each test so suite order doesn't matter."""

yield

_set_platform_for_test(None)

def test_default_platform_is_test() -> None:

assert Platform.OS == "test"

assert Platform.is_test is True

assert Platform.is_ios is False

assert Platform.is_android is False

def test_get_platform_matches_os() -> None:

assert get_platform() == Platform.OS

def test_version_string_present() -> None:

assert isinstance(Platform.Version, str)

assert len(Platform.Version) > 0

def test_select_picks_current_platform() -> None:

_set_platform_for_test("ios")

assert Platform.select({"ios": "A", "android": "B"}) == "A"

_set_platform_for_test("android")

assert Platform.select({"ios": "A", "android": "B"}) == "B"

def test_select_falls_back_to_native() -> None:

_set_platform_for_test("ios")

assert Platform.select({"native": "X", "default": "Y"}) == "X"

_set_platform_for_test("test")

# 'test' doesn't match 'native', so falls back to 'default'.

assert Platform.select({"native": "X", "default": "Y"}) == "Y"

def test_select_default_then_explicit() -> None:

_set_platform_for_test("test")

assert Platform.select({"default": "D"}) == "D"

assert Platform.select({}, default="E") == "E"

assert Platform.select({}) is None

def test_set_platform_for_test_toggles_flags() -> None:

_set_platform_for_test("ios")

assert Platform.is_ios is True

assert Platform.is_android is False

_set_platform_for_test("android")

assert Platform.is_ios is False

assert Platform.is_android is True