// Copyright (c) 2023, Sudipto Chandra
// All rights reserved. Check LICENSE file for details.

import 'dart:math';

import 'package:hashlib/hashlib.dart';
import 'package:test/test.dart';

final tests = {
  "": "d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f",
  "a": "abd37534c7d9a2efb9465de931cd7055ffdb8879563ae98078d6d6d5",
  "abc": "23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7",
  "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq":
      "75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525",
  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789":
      "bff72b4fcb7d75e5632900ac5f90d219e05e97a7bde72e740db393d9",
  "12345678901234567890123456789012345678901234567890123456789012345678901234567890":
      "b50aecbe4e9bb0b57bc5f3ae760a8e01db24f203fb3cdcd13148046e",
  "The quick brown fox jumps over the lazy dog":
      "730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525",
  "The quick brown fox jumps over the lazy cog":
      "fee755f44a55f20fb3362cdc3c493615b3cb574ed95ce610ee5b1e9b",
  List.filled(512, "a").join():
      "e926c6b764d4b216c99067c92f838ca1c5793c13c782d9ef7b668d71",
  List.filled(128, "a").join():
      "39873a2441c56608137850f4c54dde157710b9a2b83c8bdc756dd643",
  List.filled(513, "a").join():
      "e0afca6342847c80827fdc511f0004e53239d3c2f82f67ddd8185bef",
  List.filled(511, "a").join():
      "6eb1c24577241c0871ec3ab020786f59cecb2edb6acef2d483051d6a",
  List.filled(1000000, "a").join():
      "20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67",
};

void main() {
  group('SHA224 test', () {
    test('with empty string', () {
      expect(sha224sum(""), tests[""]);
    });

    test('with single letter', () {
      expect(sha224sum("a"), tests["a"]);
    });

    test('with few letters', () {
      expect(sha224sum("abc"), tests["abc"]);
    });

    test('with string of length 511', () {
      var key = tests.keys.firstWhere((x) => x.length == 511);
      var value = tests[key]!;
      expect(sha224sum(key), value);
    });

    test('with known cases', () {
      tests.forEach((key, value) {
        expect(sha224sum(key), value);
      });
    });

    test('with stream', () async {
      for (final entry in tests.entries) {
        final stream = Stream.fromIterable(
                List.generate(1 + (entry.key.length >>> 3), (i) => i << 3))
            .map((e) => entry.key.substring(e, min(entry.key.length, e + 8)))
            .map((s) => s.codeUnits);
        final result = await sha224.bind(stream).first;
        expect(result.hex(), entry.value);
      }
    });
  });
}