// New creates a new recorder
func New(cassetteName string) (*Recorder, error) {
var mode int
var c *cassette.Cassette
cassetteFile := fmt.Sprintf("%s.yaml", cassetteName)
// Depending on whether the cassette file exists or not we
// either create a new empty cassette or load from file
if _, err := os.Stat(cassetteFile); os.IsNotExist(err) {
// Create new cassette and enter in recording mode
c = cassette.New(cassetteName)
mode = ModeRecording
} else {
// Load cassette from file and enter replay mode
c, err = cassette.Load(cassetteName)
if err != nil {
return nil, err
}
mode = ModeReplaying
}
// A transport which can be used by clients to inject
transport := &Transport{c: c, mode: mode}
r := &Recorder{
mode: mode,
cassette: c,
Transport: transport,
}
return r, nil
}
func TestRecord(t *testing.T) {
runID := time.Now().Format(time.RFC3339Nano)
tests := []recordTest{
{
method: "GET",
out: "GET " + runID,
},
{
method: "POST",
body: "post body",
out: "POST " + runID + "\npost body",
},
}
dir, err := ioutil.TempDir("", "")
if err != nil {
t.Fatal(err)
}
cassPath := path.Join(dir, "record_test")
var serverURL string
serverUp := false
func() {
// Start our recorder
r, err := recorder.New(cassPath)
if err != nil {
t.Fatal(err)
}
defer r.Stop() // Make sure recorder is stopped once done with it
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "%s %s", r.Method, runID)
if r.Body != nil {
defer r.Body.Close()
fmt.Fprintln(w)
io.Copy(w, r.Body)
}
}))
serverUp = true
defer func() {
server.Close()
t.Log("server shut down")
serverUp = false
}()
serverURL = server.URL
t.Log("recording")
for _, test := range tests {
test.perform(t, serverURL, r)
}
}()
c, err := cassette.Load(cassPath)
if err != nil {
t.Fatal(err)
}
for i, test := range tests {
body := c.Interactions[i].Request.Body
if body != test.body {
t.Fatalf("got:\t%s\n\twant:\t%s", string(body), string(test.body))
}
}
if serverUp {
t.Fatal("expected server to have shut down")
}
// Re-run without the actual server
r, err := recorder.New(cassPath)
if err != nil {
t.Fatal(err)
}
defer r.Stop()
t.Log("replaying")
for _, test := range tests {
test.perform(t, serverURL, r)
}
}