sigmund@google.com
68a26315ef
tools. Review URL: https://codereview.chromium.org//12207008 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@20300 260f80e4-7a28-3924-810f-c04153c831b5
60 lines
2.0 KiB
Dart
60 lines
2.0 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
|
|
library test.vlq_test;
|
|
|
|
import 'dart:math';
|
|
import 'package:unittest/unittest.dart';
|
|
import 'package:source_maps/src/vlq.dart';
|
|
|
|
main() {
|
|
test('encode and decode - simple values', () {
|
|
expect(encodeVlq(1).join(''), 'C');
|
|
expect(encodeVlq(2).join(''), 'E');
|
|
expect(encodeVlq(3).join(''), 'G');
|
|
expect(encodeVlq(100).join(''), 'oG');
|
|
expect(decodeVlq('C'.split('').iterator), 1);
|
|
expect(decodeVlq('E'.split('').iterator), 2);
|
|
expect(decodeVlq('G'.split('').iterator), 3);
|
|
expect(decodeVlq('oG'.split('').iterator), 100);
|
|
});
|
|
|
|
test('encode and decode', () {
|
|
for (int i = -10000; i < 10000; i++) {
|
|
_checkEncodeDecode(i);
|
|
}
|
|
});
|
|
|
|
test('only 32-bit ints allowed', () {
|
|
var max_int = pow(2, 31) - 1;
|
|
var min_int = -pow(2, 31);
|
|
_checkEncodeDecode(max_int - 1);
|
|
_checkEncodeDecode(min_int + 1);
|
|
_checkEncodeDecode(max_int);
|
|
_checkEncodeDecode(min_int);
|
|
|
|
expect(encodeVlq(min_int).join(''), 'hgggggE');
|
|
expect(decodeVlq('hgggggE'.split('').iterator), min_int);
|
|
|
|
expect(() => encodeVlq(max_int + 1), throws);
|
|
expect(() => encodeVlq(max_int + 2), throws);
|
|
expect(() => encodeVlq(min_int - 1), throws);
|
|
expect(() => encodeVlq(min_int - 2), throws);
|
|
|
|
|
|
// if we allowed more than 32 bits, these would be the expected encodings
|
|
// for the large numbers above.
|
|
expect(() => decodeVlq('ggggggE'.split('').iterator), throws);
|
|
expect(() => decodeVlq('igggggE'.split('').iterator), throws);
|
|
expect(() => decodeVlq('jgggggE'.split('').iterator), throws);
|
|
expect(() => decodeVlq('lgggggE'.split('').iterator), throws);
|
|
});
|
|
}
|
|
|
|
_checkEncodeDecode(int value) {
|
|
var encoded = encodeVlq(value);
|
|
expect(decodeVlq(encoded.iterator), value);
|
|
expect(decodeVlq(encoded.join('').split('').iterator), value);
|
|
}
|