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37 lines
1.2 KiB
37 lines
1.2 KiB
4 years ago
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'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;
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