mirror of
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109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
package limiter
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import (
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"bytes"
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"crypto/rand"
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"fmt"
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"io"
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"net/http"
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"testing"
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"github.com/restic/restic/internal/test"
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)
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func TestLimiterWrapping(t *testing.T) {
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reader := bytes.NewReader([]byte{})
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writer := new(bytes.Buffer)
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for _, limits := range []struct {
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upstream int
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downstream int
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}{
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{0, 0},
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{42, 0},
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{0, 42},
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{42, 42},
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} {
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limiter := NewStaticLimiter(limits.upstream*1024, limits.downstream*1024)
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mustWrapUpstream := limits.upstream > 0
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test.Equals(t, limiter.Upstream(reader) != reader, mustWrapUpstream)
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test.Equals(t, limiter.UpstreamWriter(writer) != writer, mustWrapUpstream)
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mustWrapDownstream := limits.downstream > 0
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test.Equals(t, limiter.Downstream(reader) != reader, mustWrapDownstream)
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test.Equals(t, limiter.DownstreamWriter(writer) != writer, mustWrapDownstream)
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}
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}
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type tracedReadCloser struct {
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io.Reader
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Closed bool
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}
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func newTracedReadCloser(rd io.Reader) *tracedReadCloser {
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return &tracedReadCloser{Reader: rd}
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}
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func (r *tracedReadCloser) Close() error {
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r.Closed = true
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return nil
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}
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func TestRoundTripperReader(t *testing.T) {
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limiter := NewStaticLimiter(42*1024, 42*1024)
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data := make([]byte, 1234)
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_, err := io.ReadFull(rand.Reader, data)
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test.OK(t, err)
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var send *tracedReadCloser = newTracedReadCloser(bytes.NewReader(data))
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var recv *tracedReadCloser
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rt := limiter.Transport(roundTripper(func(req *http.Request) (*http.Response, error) {
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buf := new(bytes.Buffer)
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_, err := io.Copy(buf, req.Body)
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if err != nil {
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return nil, err
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}
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err = req.Body.Close()
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if err != nil {
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return nil, err
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}
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recv = newTracedReadCloser(bytes.NewReader(buf.Bytes()))
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return &http.Response{Body: recv}, nil
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}))
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res, err := rt.RoundTrip(&http.Request{Body: send})
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test.OK(t, err)
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out := new(bytes.Buffer)
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n, err := io.Copy(out, res.Body)
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test.OK(t, err)
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test.Equals(t, int64(len(data)), n)
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test.OK(t, res.Body.Close())
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test.Assert(t, send.Closed, "request body not closed")
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test.Assert(t, recv.Closed, "result body not closed")
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test.Assert(t, bytes.Equal(data, out.Bytes()), "data ping-pong failed")
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}
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func TestRoundTripperCornerCases(t *testing.T) {
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limiter := NewStaticLimiter(42*1024, 42*1024)
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rt := limiter.Transport(roundTripper(func(req *http.Request) (*http.Response, error) {
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return &http.Response{}, nil
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}))
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res, err := rt.RoundTrip(&http.Request{})
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test.OK(t, err)
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test.Assert(t, res != nil, "round tripper returned no response")
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rt = limiter.Transport(roundTripper(func(req *http.Request) (*http.Response, error) {
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return nil, fmt.Errorf("error")
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}))
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_, err = rt.RoundTrip(&http.Request{})
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test.Assert(t, err != nil, "round tripper lost an error")
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}
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