test/stream_cleanup_test.go

/*
 *
 * Copyright 2019 gRPC authors.
 *
 * 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 test

import (
	"context"
	"testing"

	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	testpb "google.golang.org/grpc/test/grpc_testing"
)

func (s) TestStreamCleanup(t *testing.T) {
	const initialWindowSize uint = 70 * 1024 // Must be higher than default 64K, ignored otherwise
	const bodySize = 2 * initialWindowSize   // Something that is not going to fit in a single window
	const callRecvMsgSize uint = 1           // The maximum message size the client can receive

	ss := &stubServer{
		unaryCall: func(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
			return &testpb.SimpleResponse{Payload: &testpb.Payload{
				Body: make([]byte, bodySize),
			}}, nil
		},
		emptyCall: func(context.Context, *testpb.Empty) (*testpb.Empty, error) {
			return &testpb.Empty{}, nil
		},
	}
	if err := ss.Start([]grpc.ServerOption{grpc.MaxConcurrentStreams(1)}, grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(int(callRecvMsgSize))), grpc.WithInitialWindowSize(int32(initialWindowSize))); err != nil {
		t.Fatalf("Error starting endpoint server: %v", err)
	}
	defer ss.Stop()

	if _, err := ss.client.UnaryCall(context.Background(), &testpb.SimpleRequest{}); status.Code(err) != codes.ResourceExhausted {
		t.Fatalf("should fail with ResourceExhausted, message's body size: %v, maximum message size the client can receive: %v", bodySize, callRecvMsgSize)
	}
	if _, err := ss.client.EmptyCall(context.Background(), &testpb.Empty{}); err != nil {
		t.Fatalf("should succeed, err: %v", err)
	}
}