fix(lib-classifier): expire classification session IDs

- fix the session ID tests so that they fail properly.
- fix `getSessionID` to pass the tests.
- refresh the session TTL whenever an annotation is updated.

packages/lib-classifier/src/store/utils/session.js

@@ -25,6 +25,7 @@ const sessionUtils = {
   getSessionID () {
     const stored = (storage.getItem('session_id')) ? JSON.parse(storage.getItem('session_id')) : this.generateSessionID()
     let { id, ttl } = stored
+    console.log(stored)
 
     if (ttl < Date.now()) {
       id = this.generateSessionID()

packages/lib-classifier/src/store/utils/session.spec.js

@@ -2,7 +2,7 @@ import sinon from 'sinon'
 import hash from 'hash.js'
 import sessionUtils from './session'
 
-describe('Store utils > sessionUtils', function () {
+describe.only('Store utils > sessionUtils', function () {
   describe('fiveMinutesFromNow', function () {
     it('should return a Date object', function () {
       const time = sessionUtils.fiveMinutesFromNow()
@@ -49,7 +49,9 @@ describe('Store utils > sessionUtils', function () {
     })
 
     it('it should retrieve id from session or local storage if it exists', function () {
-      const stored = { id: 'foobar', ttl: (Date.now() + 50000) }
+      const ttl = new Date()
+      ttl.setMinutes(ttl.getMinutes() + 5)
+      const stored = { id: 'foobar', ttl }
       sessionStorage.setItem('session_id', JSON.stringify(stored))
       sessionUtils.getSessionID()
       expect(generateSessionIDSpy).to.have.not.been.called()
@@ -72,7 +74,9 @@ describe('Store utils > sessionUtils', function () {
 
     describe('when the stored token has expired', function () {
       before(function () {
-        const stored = { id: 'foobar', ttl: (Date.now() - 1) }
+        const ttl = new Date()
+        ttl.setMinutes(ttl.getMinutes() - 10)
+        const stored = { id: 'foobar', ttl }
         sessionStorage.setItem('session_id', JSON.stringify(stored))
       })