1 files changed, 13 insertions, 5 deletions
diff --git a/activerecord/test/cases/schema_dumper_test.rb b/activerecord/test/cases/schema_dumper_test.rb
index e8f2f44189..71ff727b7f 100644
--- a/activerecord/test/cases/schema_dumper_test.rb
+++ b/activerecord/test/cases/schema_dumper_test.rb
@@ -1,13 +1,22 @@
 require "cases/helper"
-require 'stringio'
 
 
 class SchemaDumperTest < ActiveRecord::TestCase
+  def setup
+    @stream = StringIO.new
+  end
+
   def standard_dump
-    stream = StringIO.new
+    @stream = StringIO.new
     ActiveRecord::SchemaDumper.ignore_tables = []
-    ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, stream)
-    stream.string
+    ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, @stream)
+    @stream.string
+  end
+
+  if "string".encoding_aware?
+    def test_magic_comment
+      assert_match "# encoding: #{@stream.external_encoding.name}", standard_dump
+    end
   end
 
   def test_schema_dump
@@ -230,4 +239,3 @@ class SchemaDumperTest < ActiveRecord::TestCase
     assert_match %r{t.string[[:space:]]+"id",[[:space:]]+:null => false$}, match[2], "non-primary key id column not preserved"
   end
 end
-