assert-is

is mixin for assert.

Getting Started

Install the module with: npm install assert-is

API

It modifies is API by taking one extra argument being either a string or a callback.

If a string is given, then it will be used as the message for the error that will be thrown in case the assertion fails..

If a callback is passed then it will be called in case the assertion fails.

general

• assert.isA (value, type, message) or assert.isType (value, type, message)
• assert.isDefined (value, message)
• assert.isEmpty (value, message)
• assert.isEqual (value, other, message)
• assert.isHosted (value, host, message)
• assert.isInstance (value, constructor, message)
• assert.isInstanceof (value, constructor, message) - deprecated, because in ES3 browsers, "instanceof" is a reserved word
• assert.isNil (value, message)
• assert.isNull (value, message) - deprecated, because in ES3 browsers, "null" is a reserved word
• assert.isUndef (value, message)
• assert.isUndefined (value, message) - deprecated, because in ES3 browsers, "undefined" is a reserved word

arguments

• isArgs (value, message)

array

• isArray (value, message)
• isArraylike (value, message)

boolean

• isBool (value, message)

date

• assert.isDate (value, message)

element

• assert.isElement (value, message)

error

• assert.isError (value, message)

function

• assert.isFn (value, message)

number

• assert.isNumber (value, message)
• assert.isInfinite (value, message)
• assert.isDecimal (value, message)
• assert.isDivisibleBy (value, n, message)
• assert.isInteger (value, message)
• assert.isInt (value, message) - deprecated, because in ES3 browsers, "int" is a reserved word
• assert.isMaximum (value, others, message)
• assert.isMinimum (value, others, message)
• assert.isNan (value, message)
• assert.isEven (value, message)
• assert.isOdd (value, message)
• assert.isGe (value, other, message)
• assert.isGt (value, other, message)
• assert.isLe (value, other, message)
• assert.isLt (value, other, message)
• assert.isWithin (value, start, finish, message)

object

• assert.isObject (value, message)

regexp

• assert.isRegexp (value, message)

string

• assert.isString (value, message)

encoded binary

• assert.isBase64 (value, message)
• assert.isHex (value, message)

ES6 Symbols

• assert.isSymbol (value, message)

Examples

var assert = require('assert-is');
assert.isDefined({}, 'This is OK.');
assert.isObject("foo", '"foo" is not an object');

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

Release History

(Nothing yet)

License

Copyright (c) 2015 goliatone
Licensed under the MIT license.

https://github.com/tj/better-assert/blob/master/index.js