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<title>Code coverage report for modules/headers/AcceptLanguage.js</title>
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<h1>
<a href="../../index.html">all files</a> / <a href="index.html">modules/headers/</a> AcceptLanguage.js
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<span class="strong">91.43% </span>
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<span class="strong">83.33% </span>
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<span class="strong">100% </span>
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<span class='fraction'>32/35</span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">const parseMediaValue = require("../utils/parseMediaValue");
const parseMediaValues = require("../utils/parseMediaValues");
const qualityFactorForMediaValue = require("../utils/qualityFactorForMediaValue");
const stringifyMediaValues = require("../utils/stringifyMediaValues");
const stringifyMediaValueWithoutQualityFactor = require("../utils/stringifyMediaValueWithoutQualityFactor");
const Header = require("../Header");
const R = require("ramda");
function byMostSpecific(a, b) {
return stringifyMediaValueWithoutQualityFactor(b).length - stringifyMediaValueWithoutQualityFactor(a).length;
}
function byHighestPrecedence(a, b) {
// "*" gets least precedence, all others are equal
let precedence;
<span class="missing-if-branch" title="if path not taken" >I</span>if (a === "*") {
<span class="cstat-no" title="statement not covered" > precedence = -1;</span>
} else <span class="missing-if-branch" title="if path not taken" >I</span>if (b === "*") {
<span class="cstat-no" title="statement not covered" > precedence = 1;</span>
} else {
precedence = byMostSpecific(a, b);
}
return precedence;
}
/**
* Represents an HTTP Accept-Language header and provides several methods
* for determining acceptable content languages.
*
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
*/
class AcceptLanguage extends Header {
constructor(value) {
super("Accept-Language", value);
}
/**
* Returns the value of this header as a string.
*/
get value() {
return stringifyMediaValues(this._mediaValues, "-") || "";
}
set value(value) {
this._mediaValues = value ? parseMediaValues(value, "-") : [];
}
/**
* Returns true if the given language is acceptable.
*/
accepts(language) {
return this.qualityFactorForLanguage(language) !== 0;
}
/**
* Returns the quality factor for the given language.
*/
qualityFactorForLanguage(language) {
const values = this._mediaValues;
if (R.isEmpty(values)) {
return 1;
}
const givenValue = parseMediaValue(language, "-");
const matchingValues = values.filter(function (value) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (value.type === "*") {
<span class="cstat-no" title="statement not covered" > return true;</span>
}
if (value.subtype && value.subtype !== givenValue.subtype) {
return false;
}
return value.type === givenValue.type;
}).sort(byHighestPrecedence);
if (R.isEmpty(matchingValues)) {
return 0;
}
return qualityFactorForMediaValue(matchingValues[0]);
}
}
module.exports = AcceptLanguage;
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