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Contents
/*!
* Chai - expectTypes utility
* Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
* MIT Licensed
*/
import {AssertionError} from 'assertion-error';
import {flag} from './flag.js';
import {type} from './type-detect.js';
/**
* ### .expectTypes(obj, types)
*
* Ensures that the object being tested against is of a valid type.
*
* utils.expectTypes(this, ['array', 'object', 'string']);
*
* @param {unknown} obj constructed Assertion
* @param {Array} types A list of allowed types for this assertion
* @namespace Utils
* @name expectTypes
* @public
*/
export function expectTypes(obj, types) {
var flagMsg = flag(obj, 'message');
var ssfi = flag(obj, 'ssfi');
flagMsg = flagMsg ? flagMsg + ': ' : '';
obj = flag(obj, 'object');
types = types.map(function (t) { return t.toLowerCase(); });
types.sort();
// Transforms ['lorem', 'ipsum'] into 'a lorem, or an ipsum'
var str = types.map(function (t, index) {
var art = ~[ 'a', 'e', 'i', 'o', 'u' ].indexOf(t.charAt(0)) ? 'an' : 'a';
var or = types.length > 1 && index === types.length - 1 ? 'or ' : '';
return or + art + ' ' + t;
}).join(', ');
var objType = type(obj).toLowerCase();
if (!types.some(function (expected) { return objType === expected; })) {
throw new AssertionError(
flagMsg + 'object tested must be ' + str + ', but ' + objType + ' given',
undefined,
ssfi
);
}
}
Version data entries
26 entries across 26 versions & 1 rubygems