smallwins-add.js

var assert = require('@smallwins/validate/assert')

function add(params) {
  assert(params, {
    'a': Number,
    'b': Number,    
  })
  return params.a + params.b
}

add({a:1, b:2})

add({a:'1', b:2})

/* logs:

TypeError: expected Number but received String "1" for params.a
    at TypeError (native)
    at /Users/brianleroux/Repo/33ed82ee20aa0f4b11d630a9d423b2df/node_modules/@smallwins/validate/assert.js:47:13
    at Array.forEach (native)
    at assert (/Users/brianleroux/Repo/33ed82ee20aa0f4b11d630a9d423b2df/node_modules/@smallwins/validate/assert.js:36:23)
    at add (/Users/brianleroux/Repo/33ed82ee20aa0f4b11d630a9d423b2df/smallwins-add.js:4:3)
    at Object.<anonymous> (/Users/brianleroux/Repo/33ed82ee20aa0f4b11d630a9d423b2df/smallwins-add.js:13:1)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
*/