/* Copyright 2014 CoreOS, 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 client import ( "errors" "io/ioutil" "net/http" "net/url" "reflect" "strings" "testing" "time" "github.com/coreos/etcd/Godeps/_workspace/src/code.google.com/p/go.net/context" ) type fakeTransport struct { respchan chan *http.Response errchan chan error startCancel chan struct{} finishCancel chan struct{} } func newFakeTransport() *fakeTransport { return &fakeTransport{ respchan: make(chan *http.Response, 1), errchan: make(chan error, 1), startCancel: make(chan struct{}, 1), finishCancel: make(chan struct{}, 1), } } func (t *fakeTransport) RoundTrip(*http.Request) (*http.Response, error) { select { case resp := <-t.respchan: return resp, nil case err := <-t.errchan: return nil, err case <-t.startCancel: // wait on finishCancel to simulate taking some amount of // time while calling CancelRequest <-t.finishCancel return nil, errors.New("cancelled") } } func (t *fakeTransport) CancelRequest(*http.Request) { t.startCancel <- struct{}{} } type fakeAction struct{} func (a *fakeAction) httpRequest(url.URL) *http.Request { return &http.Request{} } func TestHTTPClientDoSuccess(t *testing.T) { tr := newFakeTransport() c := &httpClient{transport: tr} tr.respchan <- &http.Response{ StatusCode: http.StatusTeapot, Body: ioutil.NopCloser(strings.NewReader("foo")), } resp, body, err := c.do(context.Background(), &fakeAction{}) if err != nil { t.Fatalf("incorrect error value: want=nil got=%v", err) } wantCode := http.StatusTeapot if wantCode != resp.StatusCode { t.Fatalf("invalid response code: want=%d got=%d", wantCode, resp.StatusCode) } wantBody := []byte("foo") if !reflect.DeepEqual(wantBody, body) { t.Fatalf("invalid response body: want=%q got=%q", wantBody, body) } } func TestHTTPClientDoError(t *testing.T) { tr := newFakeTransport() c := &httpClient{transport: tr} tr.errchan <- errors.New("fixture") _, _, err := c.do(context.Background(), &fakeAction{}) if err == nil { t.Fatalf("expected non-nil error, got nil") } } func TestHTTPClientDoCancelContext(t *testing.T) { tr := newFakeTransport() c := &httpClient{transport: tr} tr.startCancel <- struct{}{} tr.finishCancel <- struct{}{} _, _, err := c.do(context.Background(), &fakeAction{}) if err == nil { t.Fatalf("expected non-nil error, got nil") } } func TestHTTPClientDoCancelContextWaitForRoundTrip(t *testing.T) { tr := newFakeTransport() c := &httpClient{transport: tr} donechan := make(chan struct{}) ctx, cancel := context.WithCancel(context.Background()) go func() { c.do(ctx, &fakeAction{}) close(donechan) }() // This should call CancelRequest and begin the cancellation process cancel() select { case <-donechan: t.Fatalf("httpClient.do should not have exited yet") default: } tr.finishCancel <- struct{}{} select { case <-donechan: //expected behavior return case <-time.After(time.Second): t.Fatalf("httpClient.do did not exit within 1s") } }