# frozen_string_literal: true RSpec.describe FaradayMiddleware::Gzip, type: :response do require 'brotli' let(:middleware) do described_class.new(lambda { |env| Faraday::Response.new(env) }) end context 'request' do it 'sets the Accept-Encoding request header' do env = process('').env expect(env[:request_headers][:accept_encoding]).to eq('gzip,deflate,br') end it 'doesnt overwrite existing Accept-Encoding request header' do env = process('') do |e| e[:request_headers][:accept_encoding] = 'zopfli' end.env expect(env[:request_headers][:accept_encoding]).to eq('zopfli') end end context 'response' do let(:uncompressed_body) do 'RspecHello, spec!' end let(:gzipped_body) do io = StringIO.new gz = Zlib::GzipWriter.new(io) gz.write(uncompressed_body) gz.close res = io.string res.force_encoding('BINARY') res end let(:deflated_body) do Zlib::Deflate.deflate(uncompressed_body) end let(:raw_deflated_body) do z = Zlib::Deflate.new(Zlib::DEFAULT_COMPRESSION, -Zlib::MAX_WBITS) compressed_body = z.deflate(uncompressed_body, Zlib::FINISH) z.close compressed_body end let(:brotlied_body) do Brotli.deflate(uncompressed_body) end let(:empty_body) do '' end shared_examples 'compressed response' do it 'uncompresses the body' do expect(process(body).body).to eq(uncompressed_body) end it 'sets the Content-Length' do expect(process(body).headers['Content-Length']).to eq(uncompressed_body.length) end it 'removes the Content-Encoding' do expect(process(body).headers['Content-Encoding']).to be_nil end end context 'gzipped response' do let(:body) { gzipped_body } let(:headers) { { 'Content-Encoding' => 'gzip', 'Content-Length' => body.length } } it_behaves_like 'compressed response' end context 'deflated response' do let(:body) { deflated_body } let(:headers) { { 'Content-Encoding' => 'deflate', 'Content-Length' => body.length } } it_behaves_like 'compressed response' end context 'raw deflated response' do let(:body) { raw_deflated_body } let(:headers) { { 'Content-Encoding' => 'deflate', 'Content-Length' => body.length } } it_behaves_like 'compressed response' end context 'brotlied response' do let(:body) { brotlied_body } let(:headers) { { 'Content-Encoding' => 'br', 'Content-Length' => body.length } } it_behaves_like 'compressed response' end context 'empty response' do let(:body) { empty_body } let(:headers) { { 'Content-Encoding' => 'gzip', 'Content-Length' => body.length } } it 'sets the Content-Length' do expect(process(body).headers['Content-Length']).to eq(empty_body.length) end it 'removes the Content-Encoding' do expect(process(body).headers['Content-Encoding']).to be_nil end end context 'identity response' do let(:body) { uncompressed_body } it 'does not modify the body' do expect(process(body).body).to eq(uncompressed_body) end end end end