compression_test.go

// Copyright 2021-2022 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package connect

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/bufbuild/connect-go/internal/assert"
	"google.golang.org/protobuf/types/known/emptypb"
)

func TestAcceptEncodingOrdering(t *testing.T) {
	t.Parallel()
	const (
		compressionBrotli = "br"
		expect            = compressionGzip + "," + compressionBrotli
	)

	withFakeBrotli, ok := withGzip().(*compressionOption)
	assert.True(t, ok)
	withFakeBrotli.Name = compressionBrotli

	var called bool
	verify := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		got := r.Header.Get(connectUnaryHeaderAcceptCompression)
		assert.Equal(t, got, expect)
		w.WriteHeader(http.StatusOK)
		called = true
	})
	server := httptest.NewServer(verify)
	defer server.Close()

	client := NewClient[emptypb.Empty, emptypb.Empty](
		server.Client(),
		server.URL,
		withFakeBrotli,
		withGzip(),
	)
	_, _ = client.CallUnary(context.Background(), NewRequest(&emptypb.Empty{}))
	assert.True(t, called)
}