rebuild(stage-2): establish runtime and persistence foundations

next/tests/test_database_tool.py

@@ -0,0 +1,22 @@
+import pytest
+
+from tools.database import main
+
+
+def test_status_uses_configured_data_directory(tmp_path, monkeypatch, capsys) -> None:
+    monkeypatch.setenv("APP_ENV", "test")
+    monkeypatch.setenv("APP_DATA_DIR", str(tmp_path))
+    monkeypatch.delenv("APP_DATABASE_PATH", raising=False)
+
+    assert main(["status"]) == 0
+
+    assert capsys.readouterr().out.strip() == "available=true schema_version=0"
+    assert (tmp_path / "xiaobai.db").exists()
+
+
+def test_downgrade_requires_explicit_confirmation(tmp_path, monkeypatch) -> None:
+    monkeypatch.setenv("APP_ENV", "test")
+    monkeypatch.setenv("APP_DATA_DIR", str(tmp_path))
+
+    with pytest.raises(SystemExit, match="confirm-downgrade"):
+        main(["downgrade", "--target", "0"])