import { describe, expect, test } from "vitest";

import { isSafeSystemPath } from "#src/safe-system-paths";

describe("isSafeSystemPath", () => {
  test("returns true for the whitelisted device paths", () => {
    for (const p of ["/dev/null", "/dev/stdin", "/dev/stdout", "/dev/stderr"]) {
      expect(isSafeSystemPath(p)).toBe(true);
    }
  });

  test("returns false for an arbitrary absolute path", () => {
    expect(isSafeSystemPath("/etc/passwd")).toBe(false);
  });

  test("returns false for a path prefixed with a safe system path", () => {
    expect(isSafeSystemPath("/dev/null/subdir")).toBe(false);
  });

  test("returns false for an empty string", () => {
    expect(isSafeSystemPath("")).toBe(false);
  });

  test("returns false for a relative path", () => {
    expect(isSafeSystemPath("dev/null")).toBe(false);
  });
});