Move mysql2 test for when adapter will be loaded

When run with only the Mysql adapter, we get this failure: https://travis-ci.org/rails/rails/jobs/15937907#L2416

Porting the test over to only run when mysql2 is loaded

1 files changed, 7 insertions, 0 deletions

diff --git a/activerecord/test/cases/adapters/mysql2/connection_test.rb b/activerecord/test/cases/adapters/mysql2/connection_test.rb
index 8dc1df1851..91b780a7ee 100644
--- a/activerecord/test/cases/adapters/mysql2/connection_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/connection_test.rb
@@ -13,6 +13,13 @@ class MysqlConnectionTest < ActiveRecord::TestCase
     super
   end
 
+  def test_bad_connection
+    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_no_automatic_reconnection_after_timeout
     assert @connection.active?
     @connection.update('set @@wait_timeout=1')