Ω(err).ShouldNot(HaveOccurred())
		rw = &TestResponseWriter{
			ParentHeader: http.Header{},
		}

		ctx = goa.NewContext(nil, goa.New("test"), req, rw, params)
		ctx.SetPayload(payload)
		handler = new(testHandler)
		logger := log15.New("test", "test")
		logger.SetHandler(handler)
		ctx.Logger = logger
	})

	It("encodes response using gzip", func() {
		h := func(ctx *goa.Context) error {
			ctx.Write([]byte("gzip me!"))
			ctx.WriteHeader(http.StatusOK)
			return nil
		}
		t := gzm.Middleware(gzip.BestCompression)(h)
		err := t(ctx)
		Ω(err).ShouldNot(HaveOccurred())
		Ω(ctx.ResponseStatus()).Should(Equal(http.StatusOK))

		gzr, err := gzip.NewReader(bytes.NewReader(rw.Body))
		Ω(err).ShouldNot(HaveOccurred())
		buf := bytes.NewBuffer(nil)
		io.Copy(buf, gzr)
		Ω(err).ShouldNot(HaveOccurred())
		Ω(buf.String()).Should(Equal("gzip me!"))
	})