Add failing tests for previousURL field and postId query on get thread route

test/thread_post.js

@@ -8,6 +8,8 @@ let expect = chai.expect
 let { sequelize } = require('../models')
 
 const Errors = require('../lib/errors.js')
+let PAGINATION_THREAD_ID
+let MID_PAGINATION_POST_ID
 
 chai.use(require('chai-http'))
 chai.use(require('chai-things'))
@@ -365,11 +367,15 @@ describe('Thread and post', () => {
 				.set('content-type', 'application/json')
 				.send({ category: 'category_name', name: 'pagination' })
 
+			PAGINATION_THREAD_ID = thread.body.id
+
 			for(var i = 0; i < 30; i++) {
-				await userAgent
+				let post = await userAgent
 					.post('/api/v1/post')
 					.set('content-type', 'application/json')
 					.send({ threadId: thread.body.id, content: `POST ${i}` })
+
+				if(i === 15) MID_PAGINATION_POST_ID = post.body.id
 			}
 
 			let pageOne = await userAgent.get('/api/v1/thread/' + thread.body.id)
@@ -378,6 +384,7 @@ describe('Thread and post', () => {
 			let pageInvalid = await userAgent.get('/api/v1/thread/' + thread.body.id + '?lastId=' + 100)
 
 			pageOne.body.Posts.should.have.length(10)
+			pageOne.body.meta.should.have.property('previousURL', null)
 			pageOne.body.Posts[0].should.have.property('content', '<p>POST 0</p>\n')
 
 			pageTwo.body.Posts.should.have.length(10)
@@ -390,6 +397,29 @@ describe('Thread and post', () => {
 
 			pageInvalid.body.Posts.should.have.length(0)
 
+		})
+		it('should allow you to get an individual and surrounding posts', async () => {
+			let http = chai.request(server)
+			
+			let pageOne = http.get(`/api/v1/thread/${PAGINATION_THREAD_ID}?postId=${MID_PAGINATION_POST_ID}`)
+			let pageZero = http.get(pageOne.body.meta.previousURL)
+			let pageTwo = http.get(pageOne.body.meta.nextURL)
+
+			pageOne.body.Posts.should.have.length(11)
+			pageOne.body.Posts[0].should.have.property('content', '<p>POST 10</p>\n')
+			pageOne.body.Posts[5].should.have.property('content', '<p>POST 15</p>\n')
+			pageOne.body.Posts[10].should.have.property('content', '<p>POST 20</p>\n')
+
+			pageTwo.body.Posts.should.have.length(10)
+			pageTwo.body.Posts[0].should.have.property('content', '<p>POST 21</p>\n')
+			pageTwo.body.Posts[9].should.have.property('content', '<p>POST 30</p>\n')
+			pageTwo.body.meta.should.have.property('nextURL', null)
+
+			pageZero.body.Posts.should.have.length(10)
+			pageZero.body.Posts[0].should.have.property('content', '<p>POST 0</p>\n')
+			pageZero.body.Posts[9].should.have.property('content', '<p>POST 9</p>\n')
+			pageZero.body.meta.should.have.property('previousURL', null)
+
 		})
 		it('should return an error if :id is invalid', async () => {
 			try {