shamjs/test/random/pick.test.js

Mock data generator.

var expect = require('expect.js')
var sham = require('../../lib/index')
var util = require('../../lib/util/test')
var gabble = util.gabble
describe('random/pick.js', function () {
    it('pick array', function () {
        gabble(function () {
            var arr = ['a','b','c','d']
            var result = sham.r.pick(arr)
            expect(arr.indexOf(result)).not.be(-1)
        })
    })
    it('pick string', function () {
        gabble(function () {
            var arr = 'abcd'
            var result = sham.r.pick(arr)
            expect(arr.indexOf(result)).not.be(-1)
            expect(result).to.be.a('string')
        })
    })
    it('pick(array, count)', function () {
        gabble(function () {
            var result = sham.r.pick([1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18], 10)
            expect(result.length).to.eql(10)
            expect(result).to.be.a('array')
            expect(result).to.not.eql([1,2,3,4,5,6,7,8,9,10])
        })
    })
    it('pick(array, default 2)', function () {
        let systemWarn = console.warn
        let hasWran = false
        console.warn = function(){
            hasWran = true
        }
        gabble(function () {
            var result = sham.r.pick([1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18], 0)
            expect(result.length).to.eql(2)
            expect(result).to.be.a('array')
        })
        expect(hasWran).be.ok()
        console.warn = systemWarn
    })
})