Validate Argument types.

Validate parameters you pass into methods. Can log or throw errors.

Mostly written for the purpose of understanding npm, writing a module, functional programming, etc. There are lots of argument validators I could have used.

Installation

  npm install https://github.com/emileswain/validate-arg-types/tarball/master --save
  

  npm install validate-arg-types --save
  

Usage

New instance

  var ValidateArgs = require('validate-arg-types');

  var validator = ValidateArgs('MyMethod');
  

To Throw or not to Throw

Fail fast?, in which case call throwThem first. All tests will throw at the first opportunity.

  validator.throwThem().isString('isAString');
  

or fail last and once.

  validator.throwThem(false).isString('isAString').throw();
  

you may want to log all errors detected.

  validator.throwThem(false).isString('isAString').log().throw();
  
  validator.isString('isAString').log().throw();
  

Basic tests

  
  validator.throwThem().isString('isAString');
  validator.throwThem().isArray([]);
  validator.throwThem().isObject({});
  validator.throwThem().isNumber(1234);
  validator.throwThem().isFunction(function(){});
  

Advanced tests.

  
  validator.throwThem().isObject({name:'firstname'}).has('name');
  
  

Contributing

I'm no javascript expert, writing this was in part a foray into writing an npm module on a whim.

Thanks to

https://quickleft.com/blog/creating-and-publishing-a-node-js-module/

Pondering

For the purpose of experimentation, how to re-factor to add in <,>,= tests on properties.

Release History

• 1.0.0 follows semver recommendations.
• 0.2.0 Adding functionality, docs.
• 0.1.0 Initial release