Test cross-session cursors (#3849)

FerretDB · Dec 14, 2023 · bff4306 · bff4306
1 parent c4b84a3
commit bff4306
Showing 1 changed file with 107 additions and 0 deletions.
diff --git a/integration/cursors/tailable_sessions_test.go b/integration/cursors/tailable_sessions_test.go
@@ -0,0 +1,107 @@
+// Copyright 2021 FerretDB Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cursors
+
+import (
+	"errors"
+	"sync/atomic"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+
+	"github.com/FerretDB/FerretDB/integration"
+	"github.com/FerretDB/FerretDB/integration/setup"
+	"github.com/FerretDB/FerretDB/internal/util/testutil/teststress"
+)
+
+// TestTailableCursorsBetweenSessions runs multiple cursors in parallel, that should spawn in different sessions,
+// and result in error.
+func TestTailableCursorsBetweenSessions(tt *testing.T) {
+	tt.Parallel()
+
+	t := setup.FailsForFerretDB(tt, "https://github.com/FerretDB/FerretDB/issues/153")
+
+	s := setup.SetupWithOpts(tt, nil)
+	db, ctx := s.Collection.Database(), s.Ctx
+
+	opts := options.CreateCollection().SetCapped(true).SetSizeInBytes(10000)
+	err := db.CreateCollection(s.Ctx, tt.Name(), opts)
+	require.NoError(tt, err)
+
+	collection := db.Collection(tt.Name())
+
+	bsonArr, _ := integration.GenerateDocuments(0, 50)
+
+	_, err = collection.InsertMany(ctx, bsonArr)
+	require.NoError(tt, err)
+
+	var passed atomic.Bool
+
+	teststress.StressN(t, 10, func(ready chan<- struct{}, start <-chan struct{}) {
+		findCmd := bson.D{
+			{"find", collection.Name()},
+			{"batchSize", 1},
+			{"tailable", true},
+		}
+
+		var res bson.D
+		err := db.RunCommand(ctx, findCmd).Decode(&res)
+		require.NoError(t, err)
+
+		_, cursorID := getFirstBatch(t, res)
+		require.NotEmpty(t, cursorID)
+
+		t.Cleanup(func() {
+			killCursorCmd := bson.D{
+				{"killCursors", collection.Name()},
+				{"cursors", bson.A{cursorID}},
+			}
+
+			err = db.RunCommand(ctx, killCursorCmd).Decode(&res)
+			require.NoError(t, err)
+		})
+
+		getMoreCmd := bson.D{
+			{"getMore", cursorID},
+			{"collection", collection.Name()},
+			{"batchSize", 1},
+		}
+
+		ready <- struct{}{}
+		<-start
+
+		for i := 1; i < 50; i++ {
+			err = db.RunCommand(ctx, getMoreCmd).Err()
+			if err != nil {
+				var ce mongo.CommandError
+
+				require.True(t, errors.As(err, &ce))
+				require.Equal(t, int32(50738), ce.Code)
+				require.Equal(t, "Location50738", ce.Name)
+
+				passed.Store(true)
+				return
+			}
+		}
+
+		err = db.RunCommand(ctx, getMoreCmd).Err()
+		require.NoError(t, err)
+	})
+
+	require.True(t, passed.Load(), "Expected cross-session cursor error in at least one goroutine")
+}