op-e2e: Retry the receipts fetcher test (#12794)

This is one of our flakiest tests since it's very dependent on the test runner's CPU usage.

op-service/sources/receipts_basic_test.go

@@ -9,6 +9,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/ethereum-optimism/optimism/op-service/retry"
+
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/rpc"
@@ -104,6 +106,13 @@ func TestBasicRPCReceiptsFetcher_Concurrency(t *testing.T) {
 	for _, rec := range receipts {
 		recMap[rec.TxHash] = rec
 	}
+
+	boff := &retry.ExponentialStrategy{
+		Min:       0,
+		Max:       time.Second,
+		MaxJitter: 100 * time.Millisecond,
+	}
+	err := retry.Do0(context.Background(), 10, boff, func() error {
 		mrpc := new(mockRPC)
 		rp := NewBasicRPCReceiptsFetcher(mrpc, batchSize)
 
@@ -128,8 +137,17 @@ func TestBasicRPCReceiptsFetcher_Concurrency(t *testing.T) {
 
 		mrpc.AssertExpectations(t)
 		finalNumCalls := int(numCalls.Load())
-	require.NotZero(finalNumCalls, "BatchCallContext should have been called.")
-	require.Less(finalNumCalls, numFetchers*numBatchCalls, "Some IterativeBatchCalls should have been shared.")
+
+		if finalNumCalls == 0 {
+			return errors.New("batchCallContext should have been called")
+		}
+
+		if finalNumCalls >= numFetchers*numBatchCalls {
+			return errors.New("some IterativeBatchCalls should have been shared")
+		}
+		return nil
+	})
+	require.NoError(err)
 }
 
 func runConcurrentFetchingTest(t *testing.T, rp ReceiptsProvider, numFetchers int, receipts types.Receipts, block *RPCBlock) {