DEV: Improve flaky time-sensitive specs (#9141)

plugins/poll/spec/controllers/posts_controller_spec.rb

@@ -11,7 +11,6 @@ describe PostsController do
   end
 
   describe "polls" do
-
     it "works" do
       post :create, params: {
         title: title, raw: "[poll]\n- A\n- B\n[/poll]"
@@ -39,7 +38,7 @@ describe PostsController do
     it "schedules auto-close job" do
       freeze_time
       name = "auto_close"
-      close_date = 1.month.from_now
+      close_date = 1.month.from_now.round
 
       expect do
         post :create, params: {
@@ -53,7 +52,7 @@ describe PostsController do
       json = ::JSON.parse(response.body)
       post_id = json["id"]
 
-      expect(Poll.find_by(post_id: post_id).close_at).to be_within_one_second_of(1.month.from_now)
+      expect(Poll.find_by(post_id: post_id).close_at).to eq_time(close_date)
 
       job = Jobs::ClosePoll.jobs.first
       job_args = job["args"].first

plugins/poll/spec/db/post_migrate/migrate_polls_data_spec.rb

@@ -267,7 +267,7 @@ RSpec.describe MigratePollsData do
       poll = Poll.find_by(name: "poll")
 
       expect(poll.post_id).to eq(post.id)
-      expect(poll.close_at).to eq("2018-10-08T00:00:00.000Z")
+      expect(poll.close_at).to eq_time(Time.parse("2018-10-08T00:00:00.000Z"))
 
       expect(poll.regular?).to eq(true)
       expect(poll.open?).to eq(true)