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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
package httptransport
import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"strconv"
"testing"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/testutil"
"github.com/stretchr/testify/require"
)
func Test_withRoundTripper(t *testing.T) {
tests := []struct {
name string
statusCode int
err error
}{
{
name: "successful_response",
statusCode: http.StatusNoContent,
},
{
name: "error_response",
statusCode: http.StatusForbidden,
},
{
name: "internal_error_response",
statusCode: http.StatusInternalServerError,
},
{
name: "unhandled_status_response",
statusCode: http.StatusPermanentRedirect,
},
{
name: "client_error",
err: fmt.Errorf("something went wrong"),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
histVec, counterVec := newTestMetrics(t)
next := &mockRoundTripper{
res: &http.Response{
StatusCode: tt.statusCode,
},
err: tt.err,
timeout: time.Nanosecond,
}
mtr := &meteredRoundTripper{next: next, durations: histVec, counter: counterVec, ttfbTimeout: DefaultTTFBTimeout}
r := httptest.NewRequest("GET", "/", nil)
res, err := mtr.RoundTrip(r)
if tt.err != nil {
counterCount := testutil.ToFloat64(counterVec.WithLabelValues("error"))
require.Equal(t, float64(1), counterCount, "error")
return
}
require.NoError(t, err)
require.NotNil(t, res)
statusCode := strconv.Itoa(res.StatusCode)
counterCount := testutil.ToFloat64(counterVec.WithLabelValues(statusCode))
require.Equal(t, float64(1), counterCount, statusCode)
})
}
}
func TestRoundTripTTFBTimeout(t *testing.T) {
histVec, counterVec := newTestMetrics(t)
next := &mockRoundTripper{
res: &http.Response{
StatusCode: http.StatusOK,
},
timeout: time.Millisecond,
err: nil,
}
mtr := &meteredRoundTripper{next: next, durations: histVec, counter: counterVec, ttfbTimeout: time.Nanosecond}
req, err := http.NewRequest("GET", "https://gitlab.com", nil)
require.NoError(t, err)
res, err := mtr.RoundTrip(req)
require.Nil(t, res)
require.ErrorIs(t, err, context.Canceled, "context must have been canceled after ttfb timeout")
}
func newTestMetrics(t *testing.T) (*prometheus.HistogramVec, *prometheus.CounterVec) {
t.Helper()
histVec := prometheus.NewHistogramVec(prometheus.HistogramOpts{
Name: t.Name(),
}, []string{"status_code"})
counterVec := prometheus.NewCounterVec(prometheus.CounterOpts{
Name: t.Name(),
}, []string{"status_code"})
return histVec, counterVec
}
type mockRoundTripper struct {
res *http.Response
err error
timeout time.Duration
}
func (mrt *mockRoundTripper) RoundTrip(r *http.Request) (*http.Response, error) {
select {
case <-r.Context().Done():
return nil, r.Context().Err()
case <-time.After(mrt.timeout):
return mrt.res, mrt.err
}
}
func TestInternalTransportShouldHaveCustomConnectionPoolSettings(t *testing.T) {
require.EqualValues(t, 100, DefaultTransport.MaxIdleConns)
require.EqualValues(t, 100, DefaultTransport.MaxIdleConnsPerHost)
require.EqualValues(t, 0, DefaultTransport.MaxConnsPerHost)
require.EqualValues(t, 90*time.Second, DefaultTransport.IdleConnTimeout)
require.EqualValues(t, 10*time.Second, DefaultTransport.TLSHandshakeTimeout)
require.EqualValues(t, 15*time.Second, DefaultTransport.ResponseHeaderTimeout)
require.EqualValues(t, 15*time.Second, DefaultTransport.ExpectContinueTimeout)
}
|
