forgot to add this test case

activerecord/test/cases/adapters/postgresql/connection_test.rb

@@ -0,0 +1,14 @@
+require "cases/helper"
+
+module ActiveRecord
+  class PostgresqlConnectionTest < ActiveRecord::TestCase
+    def setup
+      super
+      @connection = ActiveRecord::Base.connection
+    end
+
+    def test_encoding
+      assert_not_nil @connection.encoding
+    end
+  end
+end