/*
 *
 * Copyright 2016, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

package grpc

import (
	"net"
	"reflect"
	"strings"
	"testing"
)

type emptyServiceServer interface{}

type testServer struct{}

func TestStopBeforeServe(t *testing.T) {
	lis, err := net.Listen("tcp", "localhost:0")
	if err != nil {
		t.Fatalf("failed to create listener: %v", err)
	}

	server := NewServer()
	server.Stop()
	err = server.Serve(lis)
	if err != ErrServerStopped {
		t.Fatalf("server.Serve() error = %v, want %v", err, ErrServerStopped)
	}

	// server.Serve is responsible for closing the listener, even if the
	// server was already stopped.
	err = lis.Close()
	if got, want := ErrorDesc(err), "use of closed network connection"; !strings.Contains(got, want) {
		t.Errorf("Close() error = %q, want %q", got, want)
	}
}

func TestGetServiceInfo(t *testing.T) {
	testSd := ServiceDesc{
		ServiceName: "grpc.testing.EmptyService",
		HandlerType: (*emptyServiceServer)(nil),
		Methods: []MethodDesc{
			{
				MethodName: "EmptyCall",
				Handler:    nil,
			},
		},
		Streams: []StreamDesc{
			{
				StreamName:    "EmptyStream",
				Handler:       nil,
				ServerStreams: false,
				ClientStreams: true,
			},
		},
		Metadata: []int{0, 2, 1, 3},
	}

	server := NewServer()
	server.RegisterService(&testSd, &testServer{})

	info := server.GetServiceInfo()
	want := map[string]ServiceInfo{
		"grpc.testing.EmptyService": {
			Methods: []MethodInfo{
				{
					Name:           "EmptyCall",
					IsClientStream: false,
					IsServerStream: false,
				},
				{
					Name:           "EmptyStream",
					IsClientStream: true,
					IsServerStream: false,
				}},
			Metadata: []int{0, 2, 1, 3},
		},
	}

	if !reflect.DeepEqual(info, want) {
		t.Errorf("GetServiceInfo() = %+v, want %+v", info, want)
	}
}