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package httptransport
import (
"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) {
gaugeVec := prometheus.NewGaugeVec(prometheus.GaugeOpts{
Name: t.Name(),
}, []string{"status_code"})
counterVec := prometheus.NewCounterVec(prometheus.CounterOpts{
Name: t.Name(),
}, []string{"status_code"})
next := &mockRoundTripper{
res: &http.Response{
StatusCode: tt.statusCode,
},
err: tt.err,
}
mtr := &meteredRoundTripper{next: next, durations: gaugeVec, counter: counterVec}
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)
gaugeValue := testutil.ToFloat64(gaugeVec.WithLabelValues(statusCode))
require.Greater(t, gaugeValue, float64(0))
counterCount := testutil.ToFloat64(counterVec.WithLabelValues(statusCode))
require.Equal(t, float64(1), counterCount, statusCode)
})
}
}
type mockRoundTripper struct {
res *http.Response
err error
}
func (mrt *mockRoundTripper) RoundTrip(r *http.Request) (*http.Response, error) {
return mrt.res, mrt.err
}
func TestInternalTransportShouldHaveCustomConnectionPoolSettings(t *testing.T) {
require.EqualValues(t, 100, InternalTransport.MaxIdleConns)
require.EqualValues(t, 100, InternalTransport.MaxIdleConnsPerHost)
require.EqualValues(t, 0, InternalTransport.MaxConnsPerHost)
require.EqualValues(t, 90*time.Second, InternalTransport.IdleConnTimeout)
}
|
