1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
package caddyhttp
import (
"errors"
"net/http"
"net/http/httptest"
"testing"
"github.com/prometheus/client_golang/prometheus/testutil"
)
func TestMetricsInstrumentedHandler(t *testing.T) {
handlerErr := errors.New("oh noes")
response := []byte("hello world!")
h := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
if actual := testutil.ToFloat64(httpMetrics.requestInFlight); actual != 1.0 {
t.Errorf("Not same: expected %#v, but got %#v", 1.0, actual)
}
if handlerErr == nil {
w.Write(response)
}
return handlerErr
})
mh := middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
return h.ServeHTTP(w, r)
})
ih := newMetricsInstrumentedHandler("foo", "bar", mh)
r := httptest.NewRequest("GET", "/", nil)
w := httptest.NewRecorder()
if actual := ih.ServeHTTP(w, r, h); actual != handlerErr {
t.Errorf("Not same: expected %#v, but got %#v", handlerErr, actual)
}
if actual := testutil.ToFloat64(httpMetrics.requestInFlight); actual != 0.0 {
t.Errorf("Not same: expected %#v, but got %#v", 0.0, actual)
}
handlerErr = nil
if err := ih.ServeHTTP(w, r, h); err != nil {
t.Errorf("Received unexpected error: %w", err)
}
}
type middlewareHandlerFunc func(http.ResponseWriter, *http.Request, Handler) error
func (f middlewareHandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request, h Handler) error {
return f(w, r, h)
}
|
