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<!doctype html>
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<title>Code coverage report for lib/_stream_duplex.js</title>
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<h1>
<a href="../index.html">all files</a> / <a href="index.html">lib/</a> _stream_duplex.js
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<div class='clearfix'>
<div class='fl pad1y space-right2'>
<span class="strong">69.23% </span>
<span class="quiet">Statements</span>
<span class='fraction'>27/39</span>
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<div class='fl pad1y space-right2'>
<span class="strong">68.18% </span>
<span class="quiet">Branches</span>
<span class='fraction'>15/22</span>
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<div class='fl pad1y space-right2'>
<span class="strong">40% </span>
<span class="quiet">Functions</span>
<span class='fraction'>2/5</span>
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<div class='fl pad1y space-right2'>
<span class="strong">75.76% </span>
<span class="quiet">Lines</span>
<span class='fraction'>25/33</span>
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75</td><td class="line-coverage quiet"><span class="cline-any cline-neutral"> </span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">// a duplex stream is just a stream that is both readable and writable.
// Since JS doesn't have multiple prototypal inheritance, this class
// prototypally inherits from Readable, and then parasitically from
// Writable.
'use strict';
/*<replacement>*/
var objectKeys = Object.keys || <span class="fstat-no" title="function not covered" ><span class="branch-1 cbranch-no" title="branch not covered" >function (obj) {</span></span>
<span class="cstat-no" title="statement not covered" > var keys = [];</span>
<span class="cstat-no" title="statement not covered" > for (var key in obj) {</span>
<span class="cstat-no" title="statement not covered" > keys.push(key);</span>
}<span class="cstat-no" title="statement not covered" >return keys;</span>
};
/*</replacement>*/
module.exports = Duplex;
/*<replacement>*/
var processNextTick = require('process-nextick-args');
/*</replacement>*/
/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/
var Readable = require('./_stream_readable');
var Writable = require('./_stream_writable');
util.inherits(Duplex, Readable);
var keys = objectKeys(Writable.prototype);
for (var v = 0; v < keys.length; v++) {
var method = keys[v];
if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
}
function Duplex(options) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (!(this instanceof Duplex)) <span class="cstat-no" title="statement not covered" >return new Duplex(options);</span>
Readable.call(this, options);
Writable.call(this, options);
<span class="missing-if-branch" title="if path not taken" >I</span>if (options && options.readable === false) <span class="cstat-no" title="statement not covered" >this.readable = false;</span>
<span class="missing-if-branch" title="if path not taken" >I</span>if (options && options.writable === false) <span class="cstat-no" title="statement not covered" >this.writable = false;</span>
this.allowHalfOpen = true;
<span class="missing-if-branch" title="if path not taken" >I</span>if (options && options.allowHalfOpen === false) <span class="cstat-no" title="statement not covered" >this.allowHalfOpen = false;</span>
this.once('end', onend);
}
// the no-half-open enforcer
function onend() {
// if we allow half-open state, or if the writable side ended,
// then we're ok.
<span class="missing-if-branch" title="else path not taken" >E</span>if (this.allowHalfOpen || <span class="branch-1 cbranch-no" title="branch not covered" >this._writableState.ended)</span> return;
// no more data can be written.
// But allow more writes to happen in this tick.
<span class="cstat-no" title="statement not covered" > processNextTick(onEndNT, this);</span>
}
<span class="fstat-no" title="function not covered" >function onEndNT(self) {</span>
<span class="cstat-no" title="statement not covered" > self.end();</span>
}
<span class="fstat-no" title="function not covered" >function forEach(xs, f) {</span>
<span class="cstat-no" title="statement not covered" > for (var i = 0, l = xs.length; i < l; i++) {</span>
<span class="cstat-no" title="statement not covered" > f(xs[i], i);</span>
}
}</pre></td></tr>
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