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41 lines
1.1 KiB
41 lines
1.1 KiB
4 years ago
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var binary = require('../');
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var test = require('tap').test;
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var EventEmitter = require('events').EventEmitter;
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test('peek', function (t) {
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t.plan(4);
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var bufs = [
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new Buffer([ 6, 1, 6, 1, 6, 9, 0, 0, 0, 97 ]),
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new Buffer([ 98, 99 ]),
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new Buffer([ 100, 101, 102 ]),
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];
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var stream = new EventEmitter;
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var iv = setInterval(function () {
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var buf = bufs.shift();
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if (buf) stream.emit('data', buf)
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else clearInterval(iv)
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}, 20);
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binary.stream(stream)
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.buffer('sixone', 5)
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.peek(function () {
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this.word32le('len');
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})
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.buffer('buf', 'len')
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.word8('x')
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.tap(function (vars) {
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t.same(
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[].slice.call(vars.sixone),
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[].slice.call(new Buffer([ 6, 1, 6, 1, 6 ]))
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);
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t.same(vars.buf.length, vars.len);
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t.same(
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[].slice.call(vars.buf),
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[ 9, 0, 0, 0, 97, 98, 99, 100, 101 ]
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);
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t.same(vars.x, 102);
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})
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;
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});
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