test/test_out_s3.rb in fluent-plugin-s3-0.8.0 vs test/test_out_s3.rb in fluent-plugin-s3-0.8.1

@@ -127,9 +127,22 @@
     d = create_driver(conf)
     assert_equal false, d.instance.check_bucket
     assert_equal false, d.instance.check_object
   end
 
+  def test_config_with_hostname_placeholder
+    d = create_driver(<<EOC)
+      aws_key_id test_key_id
+      aws_sec_key test_sec_key
+      s3_bucket test_bucket
+      path log/%{hostname}/test
+      s3_object_key_format %{path}%{hostname}_%{index}
+      buffer_type memory
+EOC
+    assert_match /#{Socket.gethostname}/, d.instance.s3_object_key_format
+    assert_match /#{Socket.gethostname}/, d.instance.path
+  end
+
   def test_path_slicing
     config = CONFIG.clone.gsub(/path\slog/, "path log/%Y/%m/%d")
     d = create_driver(config)
     path_slicer = d.instance.instance_variable_get(:@path_slicer)
     path = d.instance.instance_variable_get(:@path)