Delete discarded domains at the random moment within next 24h

#790

test/models/domain/discardable_test.rb

@@ -1,30 +1,54 @@
 require 'test_helper'
 
 class DomainDiscardableTest < ActiveSupport::TestCase
-  setup do
+  def setup
+    travel_to Time.zone.parse('2010-07-05 10:30')
     @domain = domains(:shop)
+    @domain.delete_at = Time.zone.parse('2010-07-05 10:00')
   end
 
-  def test_discarding_a_domain
+  def teardown
+    travel_back
+  end
+
+  def test_discarding_a_domain_persists_the_state
     @domain.discard
     @domain.reload
     assert @domain.discarded?
   end
 
-  def test_discarding_a_domain_deletes_schedules_domain_deletion
+  def test_discarding_a_domain_schedules_deletion_at_random_time
     @domain.discard
-    assert QueJob.find_by("args->>0 = '#{@domain.id}'", job_class: DomainDeleteJob.name)
+    other_domain = domains(:airport)
+    other_domain.delete_at = Time.zone.parse('2010-07-05 10:00')
+    other_domain.discard
+
+    background_job = QueJob.find_by("args->>0 = '#{@domain.id}'", job_class: DomainDeleteJob.name)
+    other_background_job = QueJob.find_by("args->>0 = '#{other_domain.id}'",
+                                          job_class: DomainDeleteJob.name)
+    assert_not_equal background_job.run_at, other_background_job.run_at
   end
 
   def test_discarding_a_domain_bypasses_validation
     domain = domains(:invalid)
+    domain.delete_at = Time.zone.parse('2010-07-05 10:00')
     domain.discard
     domain.reload
     assert domain.discarded?
   end
 
+  def test_domain_cannot_be_discarded_repeatedly
+    @domain.discard
+
+    exception = assert_raises do
+      @domain.discard
+    end
+    assert_equal 'Domain is already discarded', exception.message
+  end
+
   def test_keeping_a_domain_bypasses_validation
     domain = domains(:invalid)
+    domain.delete_at = Time.zone.parse('2010-07-05 10:00')
     domain.discard
     domain.keep
     domain.reload