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|
package elb_test
import (
"fmt"
"net/http"
"net/url"
"os"
"testing"
"time"
. "gopkg.in/check.v1"
)
func Test(t *testing.T) {
TestingT(t)
}
type HTTPSuite struct{}
var testServer = NewTestHTTPServer("http://localhost:4444", 5*time.Second)
func (s *HTTPSuite) SetUpSuite(c *C) {
testServer.Start()
}
func (s *HTTPSuite) TearDownTest(c *C) {
testServer.FlushRequests()
}
type TestHTTPServer struct {
URL string
Timeout time.Duration
started bool
request chan *http.Request
response chan *testResponse
pending chan bool
}
type testResponse struct {
Status int
Headers map[string]string
Body string
}
func NewTestHTTPServer(url string, timeout time.Duration) *TestHTTPServer {
return &TestHTTPServer{URL: url, Timeout: timeout}
}
func (s *TestHTTPServer) Start() {
if s.started {
return
}
s.started = true
s.request = make(chan *http.Request, 64)
s.response = make(chan *testResponse, 64)
s.pending = make(chan bool, 64)
url, _ := url.Parse(s.URL)
go http.ListenAndServe(url.Host, s)
s.PrepareResponse(202, nil, "Nothing.")
for {
// Wait for it to be up.
resp, err := http.Get(s.URL)
if err == nil && resp.StatusCode == 202 {
break
}
time.Sleep(1e8)
}
s.WaitRequest() // Consume dummy request.
}
// FlushRequests discards requests which were not yet consumed by WaitRequest.
func (s *TestHTTPServer) FlushRequests() {
for {
select {
case <-s.request:
default:
return
}
}
}
func (s *TestHTTPServer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
s.request <- req
var resp *testResponse
select {
case resp = <-s.response:
case <-time.After(s.Timeout):
fmt.Fprintf(os.Stderr, "ERROR: Timeout waiting for test to provide response\n")
resp = &testResponse{500, nil, ""}
}
if resp.Headers != nil {
h := w.Header()
for k, v := range resp.Headers {
h.Set(k, v)
}
}
if resp.Status != 0 {
w.WriteHeader(resp.Status)
}
w.Write([]byte(resp.Body))
}
func (s *TestHTTPServer) WaitRequest() *http.Request {
select {
case req := <-s.request:
req.ParseForm()
return req
case <-time.After(s.Timeout):
panic("Timeout waiting for goamz request")
}
panic("unreached")
}
func (s *TestHTTPServer) PrepareResponse(status int, headers map[string]string, body string) {
s.response <- &testResponse{status, headers, body}
}
|
