from __future__ import annotations

from yuxi.channel.session.user_mapping import (
    build_channel_user_uid,
    is_channel_user,
)


class TestBuildChannelUserUid:
    def test_builds_expected_format(self):
        assert build_channel_user_uid("feishu", "acc1") == "channel:feishu:acc1"

    def test_includes_special_characters_verbatim(self):
        assert build_channel_user_uid("we-com", "acc@123") == "channel:we-com:acc@123"


class TestIsChannelUser:
    def test_channel_prefix_returns_true(self):
        assert is_channel_user("channel:feishu:acc1") is True

    def test_non_channel_prefix_returns_false(self):
        assert is_channel_user("user:123") is False

    def test_empty_string_returns_false(self):
        assert is_channel_user("") is False