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Attempt to fix flaky TestGetRoundTripper* tests #4738

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merged 6 commits into from Sep 9, 2023
Merged

Attempt to fix flaky TestGetRoundTripper* tests #4738

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1a3e25b
Fix flaky TestGetRoundTripper tests
Sep 9, 2023
4a9bc7d
Add requires to reduce test failure noise
Sep 9, 2023
f88a22d
Group asserts
Sep 9, 2023
e161b40
Revert unrelated changes
Sep 9, 2023
31bdc02
Address comments
Sep 9, 2023
2bfd5bc
dry
yurishkuro Sep 9, 2023
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71 changes: 43 additions & 28 deletions plugin/metrics/prometheus/metricsstore/reader_test.go
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Expand Up @@ -16,14 +16,14 @@ package metricsstore

import (
"context"
"fmt"
"io"
"net"
"net/http"
"net/http/httptest"
"net/url"
"os"
"strings"
"sync/atomic"
"testing"
"time"

Expand Down Expand Up @@ -518,6 +518,29 @@ func TestWarningResponse(t *testing.T) {
assert.Len(t, exp.GetSpans(), 1, "HTTP request was traced and span reported")
}

type fakePromServer struct {
*httptest.Server
authReceived atomic.Pointer[string]
}

func newFakePromServer(t *testing.T) *fakePromServer {
s := &fakePromServer{}
s.Server = httptest.NewServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
t.Logf("Request to fake Prometheus server %+v", r)
h := r.Header.Get("Authorization")
s.authReceived.Store(&h)
},
),
)
return s
}

func (s *fakePromServer) getAuth() string {
return *s.authReceived.Load()
}

func TestGetRoundTripperTLSConfig(t *testing.T) {
for _, tc := range []struct {
name string
Expand All @@ -537,13 +560,7 @@ func TestGetRoundTripperTLSConfig(t *testing.T) {
}, logger)
require.NoError(t, err)

server := httptest.NewServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
assert.Equal(t, "Bearer foo", r.Header.Get("Authorization"))
},
),
)
server := newFakePromServer(t)
defer server.Close()

req, err := http.NewRequestWithContext(
Expand All @@ -556,7 +573,9 @@ func TestGetRoundTripperTLSConfig(t *testing.T) {

resp, err := rt.RoundTrip(req)
require.NoError(t, err)

assert.Equal(t, http.StatusOK, resp.StatusCode)
assert.Equal(t, "Bearer foo", server.getAuth())
})
}
}
Expand All @@ -578,14 +597,10 @@ func TestGetRoundTripperTokenFile(t *testing.T) {
TokenOverrideFromContext: false,
}, nil)
require.NoError(t, err)
server := httptest.NewServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
assert.Equal(t, "Bearer "+wantBearer, r.Header.Get("Authorization"))
},
),
)

server := newFakePromServer(t)
defer server.Close()

ctx := bearertoken.ContextWithBearerToken(context.Background(), "tokenFromRequest")
req, err := http.NewRequestWithContext(
ctx,
Expand All @@ -594,9 +609,12 @@ func TestGetRoundTripperTokenFile(t *testing.T) {
nil,
)
require.NoError(t, err)

resp, err := rt.RoundTrip(req)
require.NoError(t, err)

assert.Equal(t, http.StatusOK, resp.StatusCode)
assert.Equal(t, "Bearer "+wantBearer, server.getAuth())
}

func TestGetRoundTripperTokenFromContext(t *testing.T) {
Expand All @@ -613,14 +631,10 @@ func TestGetRoundTripperTokenFromContext(t *testing.T) {
TokenOverrideFromContext: true,
}, nil)
require.NoError(t, err)
server := httptest.NewServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
assert.Equal(t, "Bearer tokenFromRequest", r.Header.Get("Authorization"))
},
),
)

server := newFakePromServer(t)
defer server.Close()

ctx := bearertoken.ContextWithBearerToken(context.Background(), "tokenFromRequest")
req, err := http.NewRequestWithContext(
ctx,
Expand All @@ -629,9 +643,12 @@ func TestGetRoundTripperTokenFromContext(t *testing.T) {
nil,
)
require.NoError(t, err)

resp, err := rt.RoundTrip(req)
require.NoError(t, err)

assert.Equal(t, http.StatusOK, resp.StatusCode)
assert.Equal(t, "Bearer tokenFromRequest", server.getAuth())
}

func TestGetRoundTripperTokenError(t *testing.T) {
Expand Down Expand Up @@ -685,14 +702,12 @@ func startMockPrometheusServer(t *testing.T, wantPromQlQuery string, wantWarning
}))
}

func sendResponse(t *testing.T, w http.ResponseWriter, responseFile string) error {
func sendResponse(t *testing.T, w http.ResponseWriter, responseFile string) {
bytes, err := os.ReadFile(responseFile)
if err != nil {
return err
}
require.NoError(t, err)

_, err = fmt.Fprintln(w, string(bytes))
return err
_, err = w.Write(bytes)
require.NoError(t, err)
}

func buildTestBaseQueryParametersFrom(tc metricsTestCase) metricsstore.BaseQueryParameters {
Expand Down