fix tests

bin/mastodon-data.js

@@ -13,6 +13,7 @@ function unrollThread (user, prefix, privacy, thread) {
         post: {
           internalId: prefix + key,
           text: key,
+          privacy: privacy,
           inReplyTo: parentKey && (prefix + parentKey)
         }
       })

tests/spec/009-threads.js

@@ -73,7 +73,7 @@ test('Forked threads look correct online and offline', async t => {
     .hover(getFirstVisibleStatus())
   await navigateToBazAccount(t)
   await validateForkedThread(t)
-  await t.navigateTo('/')
+  await t.navigateTo('/') // clears in-memory cache while still preserving IDB cache
     .hover(getFirstVisibleStatus())
   await navigateToBazAccount(t)
   await forceOffline()