1 files changed, 21 insertions, 0 deletions
diff --git a/activerecord/test/cases/dup_test.rb b/activerecord/test/cases/dup_test.rb
index 1e6ccecfab..638cffe0e6 100644
--- a/activerecord/test/cases/dup_test.rb
+++ b/activerecord/test/cases/dup_test.rb
@@ -1,4 +1,5 @@
 require "cases/helper"
+require 'models/reply'
 require 'models/topic'
 
 module ActiveRecord
@@ -32,6 +33,14 @@ module ActiveRecord
       assert duped.new_record?, 'topic is new'
     end
 
+    def test_dup_not_destroyed
+      topic = Topic.first
+      topic.destroy
+
+      duped = topic.dup
+      assert_not duped.destroyed?
+    end
+
     def test_dup_has_no_id
       topic = Topic.first
       duped = topic.dup
@@ -132,5 +141,17 @@ module ActiveRecord
     ensure
       Topic.default_scopes = prev_default_scopes
     end
+
+    def test_dup_without_primary_key
+      klass = Class.new(ActiveRecord::Base) do
+        self.table_name = 'parrots_pirates'
+      end
+
+      record = klass.create!
+
+      assert_nothing_raised do
+        record.dup
+      end
+    end
   end
 end