"""语言规则生成函数测试。"""

import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent.parent / "src"))

from prompt import _resolve_lang_rule


class TestLanguageRule:
    """测试语言规则生成函数。"""

    def test_explicit_language(self) -> None:
        """测试显式指定语言时，提示中包含该语言名称。"""
        result = _resolve_lang_rule("test content", "Chinese")
        assert "Chinese" in result

    def test_auto_with_chinese_content(self) -> None:
        """测试中文内容自动检测。"""
        result = _resolve_lang_rule("这是一段中文内容", None)
        assert "简体中文" in result

    def test_auto_with_english_content(self) -> None:
        """测试英文内容自动检测。"""
        result = _resolve_lang_rule("This is English content", None)
        assert "源文档" in result

    def test_auto_detection_string(self) -> None:
        """测试传入 "auto" 字符串时触发自动检测。"""
        result = _resolve_lang_rule("test", "auto")
        assert "源文档" in result