124 lines
4.4 KiB
JavaScript
124 lines
4.4 KiB
JavaScript
var ebml = require('../lib/ebml/index.js'),
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assert = require('assert');
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var STATE_TAG = 1,
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STATE_SIZE = 2,
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STATE_CONTENT = 3;
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describe('embl', function() {
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describe('Decoder', function() {
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it('should wait for more data if a tag is longer than the buffer', function() {
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var decoder = new ebml.Decoder();
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decoder.write(new Buffer([0x1A, 0x45]));
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assert.equal(STATE_TAG, decoder._state);
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assert.equal(2, decoder._buffer.length);
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assert.equal(0, decoder._cursor);
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});
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it('should clear the buffer after a full tag is written in one chunk', function() {
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var decoder = new ebml.Decoder();
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decoder.write(new Buffer([0x42, 0x86, 0x81, 0x01]));
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assert.equal(STATE_TAG, decoder._state);
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assert.equal(0, decoder._buffer.length);
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assert.equal(0, decoder._cursor);
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});
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it('should clear the buffer after a full tag is written in multiple chunks', function() {
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var decoder = new ebml.Decoder();
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decoder.write(new Buffer([0x42, 0x86]));
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decoder.write(new Buffer([0x81, 0x01]));
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assert.equal(STATE_TAG, decoder._state);
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assert.equal(0, decoder._buffer.length);
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assert.equal(0, decoder._cursor);
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});
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it('should increment the cursor on each step', function() {
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var decoder = new ebml.Decoder();
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decoder.write(new Buffer([0x42])); // 4
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assert.equal(STATE_TAG, decoder._state);
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assert.equal(1, decoder._buffer.length);
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assert.equal(0, decoder._cursor);
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decoder.write(new Buffer([0x86])); // 5
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assert.equal(STATE_SIZE, decoder._state);
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assert.equal(2, decoder._buffer.length);
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assert.equal(2, decoder._cursor);
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decoder.write(new Buffer([0x81])); // 6 & 7
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assert.equal(STATE_CONTENT, decoder._state);
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assert.equal(3, decoder._buffer.length);
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assert.equal(3, decoder._cursor);
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decoder.write(new Buffer([0x01])); // 6 & 7
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assert.equal(STATE_TAG, decoder._state);
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assert.equal(0, decoder._buffer.length);
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assert.equal(0, decoder._cursor);
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});
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it('should emit correct tag events for simple data', function(done) {
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var decoder = new ebml.Decoder();
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decoder.on('data', function(data) {
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var state = data[0];
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data = data[1];
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assert.equal(state, 'tag');
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assert.equal(data.tag, 0x286);
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assert.equal(data.tagStr, "4286");
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assert.equal(data.dataSize, 0x01);
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assert.equal(data.type, 'u');
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assert.deepEqual(data.data, new Buffer([0x01]));
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done();
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});
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decoder.write(new Buffer([0x42, 0x86, 0x81, 0x01]));
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});
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it('should emit correct EBML tag events for master tags', function(done) {
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var decoder = new ebml.Decoder();
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decoder.on('data', function(data) {
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var state = data[0];
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data = data[1];
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assert.equal(state, 'start');
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assert.equal(data.tag, 0x0a45dfa3);
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assert.equal(data.tagStr, "1a45dfa3");
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assert.equal(data.dataSize, 0);
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assert.equal(data.type, 'm');
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assert.equal(data.data, undefined);
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done();
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});
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decoder.write(new Buffer([0x1a, 0x45, 0xdf, 0xa3, 0x80]));
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});
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it('should emit correct EBML:end events for master tags', function(done) {
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var decoder = new ebml.Decoder();
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var tags = 0;
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decoder.on('data', function(data) {
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var state = data[0];
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data = data[1];
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if(state != 'end') {
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tags++;
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} else {
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assert.equal(tags, 2); // two tags
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assert.equal(data.tag, 0x0a45dfa3);
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assert.equal(data.tagStr, "1a45dfa3");
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assert.equal(data.dataSize, 4);
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assert.equal(data.type, 'm');
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assert.equal(data.data, undefined);
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done();
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}
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});
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decoder.write(new Buffer([0x1a, 0x45, 0xdf, 0xa3]));
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decoder.write(new Buffer([0x84, 0x42, 0x86, 0x81, 0x00]));
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});
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});
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});
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