'use strict'

require! {
  '../src/index.ls': resistance
  'chai': {expect}
}

describe "resistance.js Testing Specifications" ->

  resistors = [1 to 3]

  series    = resistance resistors, \series
  parallel  = resistance resistors, \parallel
  error     = resistance resistors, \error

  specify 'Series: Equivalent resistance is equal to the sum of all resistors which make up the association' ->
    expect series .to.equal 6

  specify 'Series: Equivalent resistance is greater than the greatest resistor in the association' ->
    expect series .to.be.above resistors.2

  specify 'Parallel: Equivalent resistance is equal to the inverse of the sum of all the inverted resistors which make up the association' ->
    expect parallel .to.equal 0.5454545454545455

  specify 'Parallel: Equivalent resistance is lower than the lowest resistor in the association' ->
    expect parallel .to.be.below resistors.0

  specify 'Error: It should return a valid error message when user enters a non-valid resistor type parameter' ->
    expect error .to.be.a \string

  specify 'Error: It should return the correct error message when user enters a non-valid resistor type parameter' ->
    expect error .to.equal 'Please enter a valid type of resistors association.'