Fix comparison of times for #at in job matchers.

Prior to 4.0.0 we used `to_f` to ensure parity of precision with Rails internals
this was lost when we added support for date matching, but this restores
it for Time objects only.

Co-authored-by: Markus Doits <markus.doits@stellenticket.de>

lib/rspec/rails/matchers/active_job.rb

@@ -30,8 +30,12 @@ def on_queue(queue)
             self
           end
 
-          def at(date)
-            @at = date
+          def at(time_or_date)
+            case time_or_date
+            when Time then @at = Time.at(time_or_date.to_f)
+            else
+              @at = time_or_date
+            end
             self
           end
 

spec/rspec/rails/matchers/active_job_spec.rb

@@ -216,6 +216,13 @@ def self.name; "LoggingJob"; end
       }.to have_enqueued_job.at(date)
     end
 
+    it "passes with provided at time" do
+      time = Time.now + 1.day
+      expect {
+        hello_job.set(wait_until: time).perform_later
+      }.to have_enqueued_job.at(time)
+    end
+
     it "accepts composable matchers as an at date" do
       future = 1.minute.from_now
       slightly_earlier = 58.seconds.from_now