fix(bigquery/storage/managedwriter): propagate calloptions to append (#6488)

* fix(bigquery/storage/managedwriter): propagate calloptions to append

Reporter identified that we're not properly propagating user-specified
call options when we open the AppendRows bidi stream.

Fixes: #6487

Author: shollyman

bigquery/storage/managedwriter/client.go

@@ -92,6 +92,19 @@ func (c *Client) NewManagedStream(ctx context.Context, opts ...WriterOption) (*M
 	return c.buildManagedStream(ctx, c.rawClient.AppendRows, false, opts...)
 }
 
+// createOpenF builds the opener function we need to access the AppendRows bidi stream.
+func createOpenF(ctx context.Context, streamFunc streamClientFunc) func(streamID string, opts ...gax.CallOption) (storagepb.BigQueryWrite_AppendRowsClient, error) {
+	return func(streamID string, opts ...gax.CallOption) (storagepb.BigQueryWrite_AppendRowsClient, error) {
+		arc, err := streamFunc(
+			// Bidi Streaming doesn't append stream ID as request metadata, so we must inject it manually.
+			metadata.AppendToOutgoingContext(ctx, "x-goog-request-params", fmt.Sprintf("write_stream=%s", streamID)), opts...)
+		if err != nil {
+			return nil, err
+		}
+		return arc, nil
+	}
+}
+
 func (c *Client) buildManagedStream(ctx context.Context, streamFunc streamClientFunc, skipSetup bool, opts ...WriterOption) (*ManagedStream, error) {
 	ctx, cancel := context.WithCancel(ctx)
 
@@ -103,15 +116,7 @@ func (c *Client) buildManagedStream(ctx context.Context, streamFunc streamClient
 		callOptions: []gax.CallOption{
 			gax.WithGRPCOptions(grpc.MaxCallRecvMsgSize(10 * 1024 * 1024)),
 		},
-		open: func(streamID string, opts ...gax.CallOption) (storagepb.BigQueryWrite_AppendRowsClient, error) {
-			arc, err := streamFunc(
-				// Bidi Streaming doesn't append stream ID as request metadata, so we must inject it manually.
-				metadata.AppendToOutgoingContext(ctx, "x-goog-request-params", fmt.Sprintf("write_stream=%s", streamID)))
-			if err != nil {
-				return nil, err
-			}
-			return arc, nil
-		},
+		open: createOpenF(ctx, streamFunc),
 	}
 
 	// apply writer options

bigquery/storage/managedwriter/client_test.go

@@ -14,7 +14,9 @@
 
 package managedwriter
 
-import "testing"
+import (
+	"testing"
+)
 
 func TestTableParentFromStreamName(t *testing.T) {
 	testCases := []struct {

bigquery/storage/managedwriter/managed_stream_test.go

@@ -17,12 +17,15 @@ package managedwriter
 import (
 	"context"
 	"errors"
+	"fmt"
 	"runtime"
 	"testing"
 	"time"
 
 	"github.com/googleapis/gax-go/v2"
+	"google.golang.org/genproto/googleapis/cloud/bigquery/storage/v1"
 	storagepb "google.golang.org/genproto/googleapis/cloud/bigquery/storage/v1"
+	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/proto"
@@ -420,3 +423,24 @@ func TestManagedStream_LeakingGoroutines(t *testing.T) {
 		}
 	}
 }
+
+// Ensures we're propagating call options as expected.
+// Background: https://github.com/googleapis/google-cloud-go/issues/6487
+func TestOpenCallOptionPropagation(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	ms := &ManagedStream{
+		ctx: ctx,
+		callOptions: []gax.CallOption{
+			gax.WithGRPCOptions(grpc.MaxCallRecvMsgSize(99)),
+		},
+		open: createOpenF(ctx, func(ctx context.Context, opts ...gax.CallOption) (storage.BigQueryWrite_AppendRowsClient, error) {
+			if len(opts) == 0 {
+				t.Fatalf("no options were propagated")
+			}
+			return nil, fmt.Errorf("no real client")
+		}),
+	}
+	ms.openWithRetry()
+}