Raise NoDatabaseError when db does not exist

Building on the work of #13427 this PR adds a helpful error message to the adapters: mysql, mysql2, and sqlite3

2 files changed, 21 insertions, 0 deletions

diff --git a/activerecord/test/cases/adapters/mysql/mysql_adapter_test.rb b/activerecord/test/cases/adapters/mysql/mysql_adapter_test.rb
index a2c933d96a..a8b5cfb0cd 100644
--- a/activerecord/test/cases/adapters/mysql/mysql_adapter_test.rb
+++ b/activerecord/test/cases/adapters/mysql/mysql_adapter_test.rb
@@ -16,6 +16,20 @@ module ActiveRecord
         eosql
       end
 
+      def test_bad_connection_mysql
+        assert_raise ActiveRecord::NoDatabaseError do
+          connection = ActiveRecord::Base.mysql_connection(adapter: "mysql", database: "should_not_exist-cinco-dog-db")
+          connection.exec_query('drop table if exists ex')
+        end
+      end
+
+      def test_bad_connection_mysql2
+        assert_raise ActiveRecord::NoDatabaseError do
+          connection = ActiveRecord::Base.mysql2_connection(adapter: "mysql2", database: "should_not_exist-cinco-dog-db")
+          connection.exec_query('drop table if exists ex')
+        end
+      end
+
       def test_valid_column
         column = @conn.columns('ex').find { |col| col.name == 'id' }
         assert @conn.valid_type?(column.type)
diff --git a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
index 48ffbd1103..0598ff25f8 100644
--- a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
@@ -26,6 +26,13 @@ module ActiveRecord
         ActiveSupport::Notifications.subscribe('sql.active_record', @subscriber)
       end
 
+      def test_bad_connection
+        assert_raise ActiveRecord::NoDatabaseError do
+          connection = ActiveRecord::Base.sqlite3_connection(adapter: "sqlite3", database: "/tmp/should/_not/_exist/-cinco-dog.db")
+          connection.exec_query('drop table if exists ex')
+        end
+      end
+
       def test_connect_with_url
         original_connection = ActiveRecord::Base.remove_connection
         tf = Tempfile.open 'whatever'