"""scripts/init_db.py 的 Oracle 自增 SQL 生成器单测（与 migrate_db 对齐）。

Oracle create_all 不生成 Integer 主键自增，init_db 会补 sequence + BEFORE INSERT 触发器；
这里验证生成的 DDL 字符串正确（与 scripts/migrate_db.py 的既有实现一致）。
"""

import sys
from pathlib import Path

# scripts/ 下无 __init__.py，把 scripts 目录加进 sys.path 以便直接 import
_SCRIPTS_DIR = Path(__file__).resolve().parents[3] / "scripts"


def _setup_scripts_path():
    if str(_SCRIPTS_DIR) not in sys.path:
        sys.path.insert(0, str(_SCRIPTS_DIR))


_setup_scripts_path()

import init_db


def test_oracle_sequence_sql():
    seq = init_db.oracle_sequence_sql("fastapi_user", 27)
    assert seq == "CREATE SEQUENCE fastapi_user_id_seq START WITH 27 INCREMENT BY 1 NOCACHE"


def test_oracle_trigger_sql():
    trg = init_db.oracle_trigger_sql("fastapi_user")
    assert "BEFORE INSERT ON fastapi_user FOR EACH ROW" in trg
    assert "WHEN (NEW.id IS NULL)" in trg
    assert "SELECT fastapi_user_id_seq.NEXTVAL INTO :NEW.id FROM dual" in trg