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var crc32 = require('..');
var test = require('tap').test;
test('simple crc32 is no problem', function (t) {
var input = Buffer('hey sup bros');
var expected = Buffer([0x47, 0xfa, 0x55, 0x70]);
t.same(crc32(input), expected);
t.end();
});
test('another simple one', function (t) {
var input = Buffer('IEND');
var expected = Buffer([0xae, 0x42, 0x60, 0x82]);
t.same(crc32(input), expected);
t.end();
});
test('slightly more complex', function (t) {
var input = Buffer([0x00, 0x00, 0x00]);
var expected = Buffer([0xff, 0x41, 0xd9, 0x12]);
t.same(crc32(input), expected);
t.end();
});
test('complex crc32 gets calculated like a champ', function (t) {
var input = Buffer('शीर्षक');
var expected = Buffer([0x17, 0xb8, 0xaf, 0xf1]);
t.same(crc32(input), expected);
t.end();
});
test('casts to buffer if necessary', function (t) {
var input = 'शीर्षक';
var expected = Buffer([0x17, 0xb8, 0xaf, 0xf1]);
t.same(crc32(input), expected);
t.end();
});
test('can do signed', function (t) {
var input = 'ham sandwich';
var expected = -1891873021;
t.same(crc32.signed(input), expected);
t.end();
});
test('can do unsigned', function (t) {
var input = 'bear sandwich';
var expected = 3711466352;
t.same(crc32.unsigned(input), expected);
t.end();
});
test('simple crc32 in append mode', function (t) {
var input = [Buffer('hey'), Buffer(' '), Buffer('sup'), Buffer(' '), Buffer('bros')];
var expected = Buffer([0x47, 0xfa, 0x55, 0x70]);
for (var crc = 0, i = 0; i < input.length; i++) {
crc = crc32(input[i], crc);
}
t.same(crc, expected);
t.end();
});
test('can do signed in append mode', function (t) {
var input1 = 'ham';
var input2 = ' ';
var input3 = 'sandwich';
var expected = -1891873021;
var crc = crc32.signed(input1);
crc = crc32.signed(input2, crc);
crc = crc32.signed(input3, crc);
t.same(crc, expected);
t.end();
});
test('can do unsigned in append mode', function (t) {
var input1 = 'bear san';
var input2 = 'dwich';
var expected = 3711466352;
var crc = crc32.unsigned(input1);
crc = crc32.unsigned(input2, crc);
t.same(crc, expected);
t.end();
});
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