import {
  SESSION_ID_MAX_LENGTH,
  isValidSessionId,
  toSessionId,
} from "./session-id";

describe("isValidSessionId", () => {
  test.each(["default", "a", "A1", "my-game", "under_score", "-"])(
    "accepts %p",
    (id) => {
      expect(isValidSessionId(id)).toBe(true);
    },
  );

  test.each([
    "",
    ".",
    "..",
    "../evil",
    "..\\..\\evil",
    "a/b",
    "a\\b",
    "a b",
    "a.b",
    "a/b/../c",
  ])("rejects %p", (id) => {
    expect(isValidSessionId(id)).toBe(false);
  });

  test("rejects non-strings and over-long ids", () => {
    expect(isValidSessionId(null)).toBe(false);
    expect(isValidSessionId(undefined)).toBe(false);
    expect(isValidSessionId(42)).toBe(false);
    expect(isValidSessionId("a".repeat(SESSION_ID_MAX_LENGTH + 1))).toBe(false);
  });

  test("rejects Windows reserved device names", () => {
    expect(isValidSessionId("con")).toBe(false);
    expect(isValidSessionId("COM1")).toBe(false);
    expect(isValidSessionId("Nul")).toBe(false);
  });
});

describe("toSessionId", () => {
  test("slugifies names", () => {
    expect(toSessionId("My Game")).toBe("my-game");
    expect(toSessionId("  Curse of Strahd!! ")).toBe("curse-of-strahd");
    expect(toSessionId("")).toBe("session");
    expect(toSessionId("!!!")).toBe("session");
  });

  test("avoids Windows reserved device names", () => {
    expect(toSessionId("CON")).toBe("con-session");
    expect(isValidSessionId(toSessionId("CON"))).toBe(true);
  });

  test("always yields a valid id, including for hostile input", () => {
    const names = [
      "My Game",
      "",
      "..",
      "../etc/passwd",
      "a/b\\c",
      "CON",
      "Ünïcödé",
      "x".repeat(200),
      "\0\0",
    ];
    for (const name of names) {
      expect(isValidSessionId(toSessionId(name))).toBe(true);
    }
  });
});