1 files changed, 118 insertions, 0 deletions
diff --git a/activerecord/test/cases/migration/rename_table_test.rb b/activerecord/test/cases/migration/rename_table_test.rb
new file mode 100644
index 0000000000..a9deb92585
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+++ b/activerecord/test/cases/migration/rename_table_test.rb
@@ -0,0 +1,118 @@
+# frozen_string_literal: true
+
+require "cases/migration/helper"
+
+module ActiveRecord
+  class Migration
+    class RenameTableTest < ActiveRecord::TestCase
+      include ActiveRecord::Migration::TestHelper
+
+      self.use_transactional_tests = false
+
+      def setup
+        super
+        add_column "test_models", :url, :string
+        remove_column "test_models", :created_at
+        remove_column "test_models", :updated_at
+      end
+
+      def teardown
+        rename_table :octopi, :test_models if connection.table_exists? :octopi
+        super
+      end
+
+      if current_adapter?(:SQLite3Adapter)
+        def test_rename_table_for_sqlite_should_work_with_reserved_words
+          renamed = false
+
+          add_column :test_models, :url, :string
+          connection.rename_table :references, :old_references
+          connection.rename_table :test_models, :references
+
+          renamed = true
+
+          # Using explicit id in insert for compatibility across all databases
+          connection.execute "INSERT INTO 'references' (url, created_at, updated_at) VALUES ('http://rubyonrails.com', 0, 0)"
+          assert_equal "http://rubyonrails.com", connection.select_value("SELECT url FROM 'references' WHERE id=1")
+        ensure
+          return unless renamed
+          connection.rename_table :references, :test_models
+          connection.rename_table :old_references, :references
+        end
+      end
+
+      unless current_adapter?(:FbAdapter) # Firebird cannot rename tables
+        def test_rename_table
+          rename_table :test_models, :octopi
+
+          connection.execute "INSERT INTO octopi (#{connection.quote_column_name('id')}, #{connection.quote_column_name('url')}) VALUES (1, 'http://www.foreverflying.com/octopus-black7.jpg')"
+
+          assert_equal "http://www.foreverflying.com/octopus-black7.jpg", connection.select_value("SELECT url FROM octopi WHERE id=1")
+        end
+
+        def test_rename_table_with_an_index
+          add_index :test_models, :url
+
+          rename_table :test_models, :octopi
+
+          connection.execute "INSERT INTO octopi (#{connection.quote_column_name('id')}, #{connection.quote_column_name('url')}) VALUES (1, 'http://www.foreverflying.com/octopus-black7.jpg')"
+
+          assert_equal "http://www.foreverflying.com/octopus-black7.jpg", connection.select_value("SELECT url FROM octopi WHERE id=1")
+          index = connection.indexes(:octopi).first
+          assert_includes index.columns, "url"
+          assert_equal "index_octopi_on_url", index.name
+        end
+
+        def test_rename_table_does_not_rename_custom_named_index
+          add_index :test_models, :url, name: "special_url_idx"
+
+          rename_table :test_models, :octopi
+
+          assert_equal ["special_url_idx"], connection.indexes(:octopi).map(&:name)
+        end
+      end
+
+      if current_adapter?(:PostgreSQLAdapter)
+        def test_rename_table_for_postgresql_should_also_rename_default_sequence
+          rename_table :test_models, :octopi
+
+          pk, seq = connection.pk_and_sequence_for("octopi")
+
+          assert_equal ConnectionAdapters::PostgreSQL::Name.new("public", "octopi_#{pk}_seq"), seq
+        end
+
+        def test_renaming_table_renames_primary_key
+          connection.create_table :cats, id: :uuid, default: "uuid_generate_v4()"
+          rename_table :cats, :felines
+
+          assert connection.table_exists? :felines
+          assert_not connection.table_exists? :cats
+
+          primary_key_name = connection.select_values(<<~SQL, "SCHEMA")[0]
+            SELECT c.relname
+              FROM pg_class c
+              JOIN pg_index i
+                ON c.oid = i.indexrelid
+             WHERE i.indisprimary
+               AND i.indrelid = 'felines'::regclass
+          SQL
+
+          assert_equal "felines_pkey", primary_key_name
+        ensure
+          connection.drop_table :cats, if_exists: true
+          connection.drop_table :felines, if_exists: true
+        end
+
+        def test_renaming_table_doesnt_attempt_to_rename_non_existent_sequences
+          connection.create_table :cats, id: :uuid, default: "uuid_generate_v4()"
+          assert_nothing_raised { rename_table :cats, :felines }
+          assert connection.table_exists? :felines
+          assert_not connection.table_exists? :cats
+        ensure
+          connection.drop_table :cats, if_exists: true
+          connection.drop_table :felines, if_exists: true
+        end
+      end
+    end
+  end
+end