2 files changed, 45 insertions, 0 deletions
diff --git a/activerecord/test/cases/modules_test.rb b/activerecord/test/cases/modules_test.rb
index d781a229f4..7209966bf8 100644
--- a/activerecord/test/cases/modules_test.rb
+++ b/activerecord/test/cases/modules_test.rb
@@ -82,4 +82,32 @@ class ModulesTest < ActiveRecord::TestCase
       end
     end
   end
+
+  def test_module_table_name_prefix
+    assert_equal 'prefixed_companies', MyApplication::Business::Prefixed::Company.table_name, 'inferred table_name for ActiveRecord model in module with table_name_prefix'
+    assert_equal 'prefixed_companies', MyApplication::Business::Prefixed::Nested::Company.table_name, 'table_name for ActiveRecord model in nested module with a parent table_name_prefix'
+    assert_equal 'companies', MyApplication::Business::Prefixed::Firm.table_name, 'explicit table_name for ActiveRecord model in module with table_name_prefix should not be prefixed'
+  end
+
+  def test_module_table_name_prefix_with_global_prefix
+    classes = [ MyApplication::Business::Company,
+                MyApplication::Business::Firm,
+                MyApplication::Business::Client,
+                MyApplication::Business::Client::Contact,
+                MyApplication::Business::Developer,
+                MyApplication::Business::Project,
+                MyApplication::Business::Prefixed::Company,
+                MyApplication::Business::Prefixed::Nested::Company,
+                MyApplication::Billing::Account ]
+
+    ActiveRecord::Base.table_name_prefix = 'global_'
+    classes.each(&:reset_table_name)
+    assert_equal 'global_companies', MyApplication::Business::Company.table_name, 'inferred table_name for ActiveRecord model in module without table_name_prefix'
+    assert_equal 'prefixed_companies', MyApplication::Business::Prefixed::Company.table_name, 'inferred table_name for ActiveRecord model in module with table_name_prefix'
+    assert_equal 'prefixed_companies', MyApplication::Business::Prefixed::Nested::Company.table_name, 'table_name for ActiveRecord model in nested module with a parent table_name_prefix'
+    assert_equal 'companies', MyApplication::Business::Prefixed::Firm.table_name, 'explicit table_name for ActiveRecord model in module with table_name_prefix should not be prefixed'
+  ensure
+    ActiveRecord::Base.table_name_prefix = ''
+    classes.each(&:reset_table_name)
+  end
 end
diff --git a/activerecord/test/models/company_in_module.rb b/activerecord/test/models/company_in_module.rb
index cdda7a44d4..83d71b6909 100644
--- a/activerecord/test/models/company_in_module.rb
+++ b/activerecord/test/models/company_in_module.rb
@@ -32,6 +32,23 @@ module MyApplication
       has_and_belongs_to_many :developers
     end
 
+    module Prefixed
+      def self.table_name_prefix
+        'prefixed_'
+      end
+
+      class Company < ActiveRecord::Base
+      end
+
+      class Firm < Company
+        self.table_name = 'companies'
+      end
+
+      module Nested
+        class Company < ActiveRecord::Base
+        end
+      end
+    end
   end
 
   module Billing