Updaeted query_frontend_test

    -- Added sample metric, and the remoteWrite function call

Signed-off-by: pawarpranav83 <[email protected]>

test/e2e/query_frontend_test.go

@@ -449,6 +449,25 @@ func TestQueryFrontendMemcachedCache(t *testing.T) {
 	q := e2ethanos.NewQuerierBuilder(e, "1", i.InternalEndpoint("grpc")).Init()
 	testutil.Ok(t, e2e.StartAndWaitReady(q))
 
+	tsMillis := timestamp.FromTime(now)
+
+	var samplesrw []prompb.TimeSeries
+
+	metric := []prompb.Label{
+		{Name: "__name__", Value: "up"},
+		{Name: "instance", Value: "localhost:9090"},
+		{Name: "job", Value: "myself"},
+		{Name: "prometheus", Value: "test"},
+		{Name: "replica", Value: "0"},
+	}
+
+	samplesrw = append(samplesrw, prompb.TimeSeries{
+		Labels: metric,
+		Samples: []prompb.Sample{
+			{Value: float64(0), Timestamp: tsMillis},
+		},
+	})
+
 	memcached := e2ethanos.NewMemcached(e, "1")
 	testutil.Ok(t, e2e.StartAndWaitReady(memcached))
 
@@ -475,6 +494,8 @@ func TestQueryFrontendMemcachedCache(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 	t.Cleanup(cancel)
 
+	testutil.Ok(t, remoteWrite(ctx, samplesrw, i.Endpoint("remote-write")))
+
 	testutil.Ok(t, q.WaitSumMetricsWithOptions(e2emon.Equals(1), []string{"thanos_store_nodes_grpc_connections"}, e2emon.WaitMissingMetrics()))
 
 	testutil.Ok(t, queryFrontend.WaitSumMetrics(e2emon.Equals(1), "cortex_memcache_client_servers"))