1var crc32 = require('..');
 2var test = require('tap').test;
 3
 4test('simple crc32 is no problem', function (t) {
 5  var input = Buffer('hey sup bros');
 6  var expected = Buffer([0x47, 0xfa, 0x55, 0x70]);
 7  t.same(crc32(input), expected);
 8  t.end();
 9});
10
11test('another simple one', function (t) {
12  var input = Buffer('IEND');
13  var expected = Buffer([0xae, 0x42, 0x60, 0x82]);
14  t.same(crc32(input), expected);
15  t.end();
16});
17
18test('slightly more complex', function (t) {
19  var input = Buffer([0x00, 0x00, 0x00]);
20  var expected = Buffer([0xff, 0x41, 0xd9, 0x12]);
21  t.same(crc32(input), expected);
22  t.end();
23});
24
25test('complex crc32 gets calculated like a champ', function (t) {
26  var input = Buffer('शीर्षक');
27  var expected = Buffer([0x17, 0xb8, 0xaf, 0xf1]);
28  t.same(crc32(input), expected);
29  t.end();
30});
31
32test('casts to buffer if necessary', function (t) {
33  var input = 'शीर्षक';
34  var expected = Buffer([0x17, 0xb8, 0xaf, 0xf1]);
35  t.same(crc32(input), expected);
36  t.end();
37});
38
39test('can do signed', function (t) {
40  var input = 'ham sandwich';
41  var expected = -1891873021;
42  t.same(crc32.signed(input), expected);
43  t.end();
44});
45
46test('can do unsigned', function (t) {
47  var input = 'bear sandwich';
48  var expected = 3711466352;
49  t.same(crc32.unsigned(input), expected);
50  t.end();
51});
52
53
54test('simple crc32 in append mode', function (t) {
55  var input = [Buffer('hey'), Buffer(' '), Buffer('sup'), Buffer(' '), Buffer('bros')];
56  var expected = Buffer([0x47, 0xfa, 0x55, 0x70]);
57  for (var crc = 0, i = 0; i < input.length; i++) {
58    crc = crc32(input[i], crc);
59  }
60  t.same(crc, expected);
61  t.end();
62});
63
64
65test('can do signed in append mode', function (t) {
66  var input1 = 'ham';
67  var input2 = ' ';
68  var input3 = 'sandwich';
69  var expected = -1891873021;
70
71  var crc = crc32.signed(input1);
72  crc = crc32.signed(input2, crc);
73  crc = crc32.signed(input3, crc);
74
75  t.same(crc, expected);
76  t.end();
77});
78
79test('can do unsigned in append mode', function (t) {
80  var input1 = 'bear san';
81  var input2 = 'dwich';
82  var expected = 3711466352;
83
84  var crc = crc32.unsigned(input1);
85  crc = crc32.unsigned(input2, crc);
86  t.same(crc, expected);
87  t.end();
88});
89