Sort enabled adapter extensions in schema dump

The list of enabled adapter extensions in the schema dump isn't
sorted by default, so it may happen that the sorting changes
over time. If you're using a VCS, a change to the sorting results
in a diff without any real change. Sorting the list should solve
this problem.

1 files changed, 14 insertions, 0 deletions

diff --git a/activerecord/test/cases/schema_dumper_test.rb b/activerecord/test/cases/schema_dumper_test.rb
index 4c81e825fa..9e57417e9c 100644
--- a/activerecord/test/cases/schema_dumper_test.rb
+++ b/activerecord/test/cases/schema_dumper_test.rb
@@ -301,6 +301,20 @@ class SchemaDumperTest < ActiveRecord::TestCase
         assert_no_match "# These are extensions that must be enabled", output
         assert_no_match %r{enable_extension}, output
       end
+
+      def test_schema_dump_includes_extensions_in_alphabetic_order
+        connection = ActiveRecord::Base.connection
+
+        connection.stubs(:extensions).returns(["hstore", "uuid-ossp", "xml2"])
+        output = perform_schema_dump
+        enabled_extensions = output.scan(%r{enable_extension "(.+)"}).flatten
+        assert_equal ["hstore", "uuid-ossp", "xml2"], enabled_extensions
+
+        connection.stubs(:extensions).returns(["uuid-ossp", "xml2", "hstore"])
+        output = perform_schema_dump
+        enabled_extensions = output.scan(%r{enable_extension "(.+)"}).flatten
+        assert_equal ["hstore", "uuid-ossp", "xml2"], enabled_extensions
+      end
     end
   end