#!/usr/bin/env python3
# Copyright 2016 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Tests for generate_token.py"""

import argparse
import generate_token
from unittest import main, mock, TestCase


class GenerateTokenTest(TestCase):
  def test_hostname_validation(self):
    for hostname, expected_result in [
      ("", None),
      (None, None),
      ("example.com", "example.com"),
      ("127.0.0.1", "127.0.0.1"),
      ("localhost", "localhost"),
      ("example.com.", "example.com"),
      ("ExAmPlE.coM", "example.com"),
      (".example.com", None),
      ("example..com", None),
      ("example123.com", "example123.com"),
      ("123example.com", "123example.com"),
      ("a.com", "a.com"),
      ("1.com", "1.com"),
      ("-.com", None),
      ("aa.com", "aa.com"),
      ("a1.com", "a1.com"),
      ("a-.com", None),
      ("-a.com", None),
      ("123-example.com", "123-example.com"),
      ("-123example.com", None),
      ("123example-.com", None),
      (("a" * 63) + ".com", ("a" * 63) + ".com"),
      (("a" * 64) + ".com", None),
      (".".join([("a" * 15)] * 16), ".".join([("a" * 15)] * 16)),
      (".".join([("a" * 15)] * 17), None),
    ]:
      self.assertEqual(
        generate_token.HostnameFromArg(hostname), expected_result
      )

  def test_extension_id_validation(self):
    for extension_id, expected_result in [
      ("a" * 32, True),
      ("p" * 32, True),
      ("a" * 2, False),
      ("a" * 33, False),
      ("q" * 32, False),
      ("A" * 32, False),
    ]:
      self.assertEqual(
        generate_token.IsExtensionId(extension_id), expected_result
      )

  def test_origin_constructed_correctly(self):
    for origin_arg, expected_result in [
      ("example.com", "https://example.com:443"),
      ("https://example.com", "https://example.com:443"),
      ("https://example.com/", "https://example.com:443"),
      ("http://example.com", "http://example.com:80"),
      ("http://127.0.0.1:8000", "http://127.0.0.1:8000"),
      ("http://user:pass@example.com/path", "http://example.com:80"),
      ("chrome-extension://" + "a" * 32, "chrome-extension://" + "a" * 32),
      (
        "chrome-extension://" + "a" * 32 + "/",
        "chrome-extension://" + "a" * 32,
      ),
    ]:
      self.assertEqual(
        generate_token.OriginFromArg(origin_arg), expected_result
      )

  def test_origin_fails_correctly(self):
    for invalid_hostname in [
      "example..com",
      "gopher://gopher.tc.umn.edu",
      "https://",
      "https://example.com:NaN/",
      "chrome-extension://user:pass@" + "a" * 32,
      "chrome-extension://" + "a" * 32 + ":1",
      "chrome-extension://aaa",
      "chrome-extension://" + "a" * 32 + "x",
      "chrome-extension://x" + "a" * 32,
      "Not even close",
    ]:
      self.assertRaises(
        argparse.ArgumentTypeError,
        generate_token.OriginFromArg,
        invalid_hostname,
      )

  def test_end_to_end(self):
    with mock.patch(
      'sys.argv', ['generate-token.py', 'example.com', 'example']
    ):
      generate_token.GenerateTokenAndSignature()

  def test_FormatToken(self):
    for version, signature, token_data, expected in [
      (b'\x03', bytes([1, 2, 3]), bytes([4, 5, 6]), 'AwECAwAAAAMEBQY='),
      (b'\x03', bytes([200, 100, 1]), bytes([30, 40, 50]), 'A8hkAQAAAAMeKDI='),
      (b'\x02', bytes([2, 3, 2]), bytes([2, 3, 2]), 'AgIDAgAAAAMCAwI='),
      (
        b'\x02',
        bytes([255, 150, 10]),
        bytes([10, 150, 255]),
        'Av+WCgAAAAMKlv8=',
      ),
    ]:
      self.assertEqual(
        generate_token.FormatToken(version, signature, token_data), expected
      )


if __name__ == '__main__':
  main()