veilid/veilid-flutter/test/test_encoding.dart

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import 'dart:convert';
import 'dart:math';
import 'dart:typed_data';
import 'package:flutter_test/flutter_test.dart';
import 'package:veilid/veilid_encoding.dart';
const knownVectors = [
['', ''],
['f', 'Zg'],
['fo', 'Zm8'],
['foo', 'Zm9v'],
['foob', 'Zm9vYg'],
['fooba', 'Zm9vYmE'],
['foobar', 'Zm9vYmFy']
];
Future<void> _testEncodingKnownVector(Uint8List k, String v) async {
final e = base64UrlNoPadEncode(k);
expect(e, v, reason: 'encode mismatch');
final d = base64UrlNoPadDecode(v);
expect(d, k, reason: 'decode mismatch');
final r = base64UrlNoPadDecode(e);
expect(r, k, reason: 'round trip mismatch');
}
Future<void> testEncodingKnownVectors() async {
for (final kv in knownVectors) {
final k = Uint8List.fromList(kv[0].codeUnits);
final v = kv[1];
await _testEncodingKnownVector(k, v);
}
}
Future<void> testEncodeDecodeGarbage() async {
final random = Random(0);
for (var n = 0; n < 8192; n++) {
final kl = List<int>.empty(growable: true);
for (var p = 0; p < n; p++) {
final v = random.nextInt(256);
kl.add(v);
}
final k = Uint8List.fromList(kl);
final e = base64UrlNoPadEncode(k);
final r = base64UrlNoPadDecode(e);
expect(r, k, reason: 'garbage round trip mismatch');
}
}
Future<void> testEncodeDecodeGarbagePad() async {
final random = Random(0);
for (var n = 0; n < 8192; n++) {
final kl = List<int>.empty(growable: true);
for (var p = 0; p < n; p++) {
final v = random.nextInt(256);
kl.add(v);
}
final k = Uint8List.fromList(kl);
final e = base64Url.encode(k);
final r = base64UrlNoPadDecode(e);
expect(r, k, reason: 'garbage w/pad round trip mismatch');
}
}