time-to-botec

Benchmark sampling in different programming languages
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validate.js (1267B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2018 The Stdlib Authors.
      5 *
      6 * Licensed under the Apache License, Version 2.0 (the "License");
      7 * you may not use this file except in compliance with the License.
      8 * You may obtain a copy of the License at
      9 *
     10 *    http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing, software
     13 * distributed under the License is distributed on an "AS IS" BASIS,
     14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15 * See the License for the specific language governing permissions and
     16 * limitations under the License.
     17 */
     18 
     19 'use strict';
     20 
     21 /**
     22 * Tests that a value is a valid constructor.
     23 *
     24 * @private
     25 * @param {*} value - value to test
     26 * @returns {(Error|null)} error object or null
     27 *
     28 * @example
     29 * var ctor = function ctor() {};
     30 *
     31 * var err = validate( ctor );
     32 * // returns null
     33 *
     34 * err = validate( null );
     35 * // returns <TypeError>
     36 */
     37 function validate( value ) {
     38 	var type = typeof value;
     39 	if (
     40 		value === null ||
     41 		(type !== 'object' && type !== 'function')
     42 	) {
     43 		return new TypeError( 'invalid argument. A provided constructor must be either an object (except null) or a function. Value: `'+value+'`.' );
     44 	}
     45 	return null;
     46 }
     47 
     48 
     49 // EXPORTS //
     50 
     51 module.exports = validate;