nodeTest.js

import chai, { expect } from 'chai'
import chaiChange from 'chai-change'
import Node from '../src/node'

chai.use(chaiChange)

describe('Node', () => {

    const nodeA = new Node({data: 'apple'})
    const nodeB = new Node({data: 'banana'})

    it('checks to see if Node is a function', () => {
        expect(Node).to.be.a('function')
    })

    context('getData()', () => {
        it('returns the data ("apple") of the node', () => {
            nodeA.getData()
            expect(nodeA.data.data).to.equal('apple')
        })
    })
    context('setNext()', () => {
        it('changes the reference to the next node and returns the original node', () => {
            nodeA.setNext(nodeB)
            expect(nodeA.next.data.data).to.equal('banana')
        })
    })
    context('getNext()', () => {
        it('returns the next node', () => {
            expect(nodeA.getNext(nodeB) ).to.equal(nodeA.next)
        })

        it('return null if no next node', () => {
            expect(nodeA.getNext() ).to.equal(null)
        })
    })

})