Do not print anything related to extensions when they don't none exist

When extensions are supported but there's no one enabled in the
database, we should not print anything related to them in schema.rb.

1 files changed, 10 insertions, 0 deletions

diff --git a/activerecord/test/cases/schema_dumper_test.rb b/activerecord/test/cases/schema_dumper_test.rb
index c5092e15ea..bbe1a14d00 100644
--- a/activerecord/test/cases/schema_dumper_test.rb
+++ b/activerecord/test/cases/schema_dumper_test.rb
@@ -237,8 +237,18 @@ class SchemaDumperTest < ActiveRecord::TestCase
       unless connection.extension_enabled?('hstore')
         connection.enable_extension 'hstore'
       end
+
       output = standard_dump
+      assert_match "# These are extensions that must be enabled", output
       assert_match %r{enable_extension "hstore"}, output
+
+      connection.extensions.each do |ext|
+        connection.disable_extension ext
+      end
+
+      output = standard_dump
+      assert_no_match "# These are extensions that must be enabled", output
+      assert_no_match %r{enable_extension}, output
     end
 
     def test_schema_dump_includes_xml_shorthand_definition