GODRIVER-2388 Improved Bulk Write API.

internal/driverutil/operation.go

@@ -28,4 +28,5 @@ const (
 	ListIndexesOp       = "listIndexes"       // ListIndexesOp is the name for listing indexes
 	ListDatabasesOp     = "listDatabases"     // ListDatabasesOp is the name for listing databases
 	UpdateOp            = "update"            // UpdateOp is the name for updating
+	BulkWriteOp         = "bulkWrite"         // BulkWriteOp is the name for client-level bulk write
 )

internal/integration/client_side_encryption_test.go

@@ -398,7 +398,7 @@ func TestClientSideEncryptionCustomCrypt(t *testing.T) {
 			"expected 0 calls to DecryptExplicit, got %v", cc.numDecryptExplicitCalls)
 		assert.Equal(mt, cc.numCloseCalls, 0,
 			"expected 0 calls to Close, got %v", cc.numCloseCalls)
-		assert.Equal(mt, cc.numBypassAutoEncryptionCalls, 2,
+		assert.Equal(mt, cc.numBypassAutoEncryptionCalls, 1,
 			"expected 2 calls to BypassAutoEncryption, got %v", cc.numBypassAutoEncryptionCalls)
 	})
 }

internal/integration/client_test.go

@@ -28,6 +28,7 @@ import (
 	"go.mongodb.org/mongo-driver/v2/mongo"
 	"go.mongodb.org/mongo-driver/v2/mongo/options"
 	"go.mongodb.org/mongo-driver/v2/mongo/readpref"
+	"go.mongodb.org/mongo-driver/v2/mongo/writeconcern"
 	"go.mongodb.org/mongo-driver/v2/x/bsonx/bsoncore"
 	"go.mongodb.org/mongo-driver/v2/x/mongo/driver"
 	"go.mongodb.org/mongo-driver/v2/x/mongo/driver/wiremessage"
@@ -718,6 +719,77 @@ func TestClient(t *testing.T) {
 			})
 		}
 	})
+	mtBulkWriteOpts := mtest.NewOptions().MinServerVersion("8.0").AtlasDataLake(false).ClientType(mtest.Pinned)
+	mt.RunOpts("bulk write with nil filter", mtBulkWriteOpts, func(mt *mtest.T) {
+		mt.Parallel()
+
+		testCases := []struct {
+			name   string
+			models *mongo.ClientWriteModels
+		}{
+			{
+				name:   "DeleteOne",
+				models: (&mongo.ClientWriteModels{}).AppendDeleteOne("foo", "bar", mongo.NewClientDeleteOneModel()),
+			},
+			{
+				name:   "DeleteMany",
+				models: (&mongo.ClientWriteModels{}).AppendDeleteMany("foo", "bar", mongo.NewClientDeleteManyModel()),
+			},
+			{
+				name:   "UpdateOne",
+				models: (&mongo.ClientWriteModels{}).AppendUpdateOne("foo", "bar", mongo.NewClientUpdateOneModel()),
+			},
+			{
+				name:   "UpdateMany",
+				models: (&mongo.ClientWriteModels{}).AppendUpdateMany("foo", "bar", mongo.NewClientUpdateManyModel()),
+			},
+		}
+		for _, tc := range testCases {
+			tc := tc
+
+			mt.Run(tc.name, func(mt *mtest.T) {
+				mt.Parallel()
+
+				_, err := mt.Client.BulkWrite(context.Background(), tc.models)
+				require.ErrorContains(mt, err, "filter is required")
+			})
+		}
+	})
+	mt.RunOpts("bulk write with write concern", mtBulkWriteOpts, func(mt *mtest.T) {
+		mt.Parallel()
+
+		testCases := []struct {
+			name string
+			opts *options.ClientBulkWriteOptionsBuilder
+			want bool
+		}{
+			{
+				name: "unacknowledged",
+				opts: options.ClientBulkWrite().SetWriteConcern(writeconcern.Unacknowledged()).SetOrdered(false),
+				want: false,
+			},
+			{
+				name: "acknowledged",
+				want: true,
+			},
+		}
+		for _, tc := range testCases {
+			tc := tc
+
+			mt.Run(tc.name, func(mt *mtest.T) {
+				mt.Parallel()
+
+				var models *mongo.ClientWriteModels
+
+				insertOneModel := mongo.NewClientInsertOneModel().SetDocument(bson.D{{"x", 1}})
+				models = (&mongo.ClientWriteModels{}).AppendInsertOne("foo", "bar", insertOneModel)
+				res, err := mt.Client.BulkWrite(context.Background(), models, tc.opts)
+				require.NoError(mt, err, "BulkWrite error: %v", err)
+				require.NotNil(mt, res, "expected a ClientBulkWriteResult")
+				assert.Equal(mt, res.Acknowledged, tc.want, "expected Acknowledged: %v, got: %v", tc.want, res.Acknowledged)
+			})
+		}
+	})
 }
 
 func TestClient_BSONOptions(t *testing.T) {

internal/integration/collection_test.go

@@ -1713,6 +1713,41 @@ func TestCollection(t *testing.T) {
 				})
 			}
 		})
+		mt.Run("error on nil filter", func(mt *mtest.T) {
+			mt.Parallel()
+
+			testCases := []struct {
+				name  string
+				model mongo.WriteModel
+			}{
+				{
+					name:  "DeleteOne",
+					model: mongo.NewDeleteOneModel(),
+				},
+				{
+					name:  "DeleteMany",
+					model: mongo.NewDeleteManyModel(),
+				},
+				{
+					name:  "UpdateOne",
+					model: mongo.NewUpdateOneModel().SetUpdate(bson.D{{"$set", bson.D{{"x", 1}}}}),
+				},
+				{
+					name:  "UpdateMany",
+					model: mongo.NewUpdateManyModel().SetUpdate(bson.D{{"$set", bson.D{{"x", 1}}}}),
+				},
+			}
+			for _, tc := range testCases {
+				tc := tc
+
+				mt.Run(tc.name, func(mt *mtest.T) {
+					mt.Parallel()
+
+					_, err := mt.Coll.BulkWrite(context.Background(), []mongo.WriteModel{tc.model})
+					assert.ErrorContains(mt, err, "filter is required")
+				})
+			}
+		})
 		mt.Run("correct model in errors", func(mt *mtest.T) {
 			models := []mongo.WriteModel{
 				mongo.NewUpdateOneModel().SetFilter(bson.M{}).SetUpdate(bson.M{