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37 lines
1.2 KiB
37 lines
1.2 KiB
'use strict'; |
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var assert = require('assert'); |
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/** |
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* Reducer function that converts a codec list to a hash. |
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* @throws Error on bad codec |
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* @param {{name:string, decode:function, encode:function, root:function}} candidate A possible codec |
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* @returns True where an error is not thrown |
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*/ |
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function testCodec(candidate) { |
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assert( |
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!!candidate && (typeof candidate === 'object'), |
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'Codec must be an object' |
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); |
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assert( |
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(typeof candidate.name === 'string') && /^[\w-]+$/.test(candidate.name), |
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'Codec.name must be a kebab-case string' |
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); |
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assert( |
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(typeof candidate.decode === 'function') && (candidate.decode.length === 1), |
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'Codec.decode must be a function that accepts a single source string' |
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); |
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assert( |
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(typeof candidate.encode === 'undefined') || |
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((typeof candidate.encode === 'function') && (candidate.encode.length === 1)), |
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'Codec.encode must be a function that accepts a single absolute path string, or else be omitted' |
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); |
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assert( |
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(typeof candidate.root === 'undefined') || |
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(typeof candidate.root === 'function') && (candidate.root.length === 0), |
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'Codec.root must be a function that accepts no arguments, or else be omitted' |
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); |
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return true; |
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} |
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module.exports = testCodec; |