Issue #47/pull request #48: add unit test
Issue #47/pull request #48: add unit test

insionng/gopher-lua,gale320/gopher-lua,yuin/gopher-lua,insionng/gopher-lua,kohkimakimoto/gopher-lua,kohkimakimoto/gopher-lua,trigrass2/gopher-lua,yuin/gopher-lua