// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.Linq;
using Microsoft.AspNetCore.SignalR.Internal;
using Xunit;

namespace Microsoft.AspNetCore.SignalR.Tests
{
    public class HubReflectionHelperTests
    {
        [Fact]
        public void EmptyHubHasNoHubMethods()
        {
            var hubMethods = HubReflectionHelper.GetHubMethods(typeof(EmptyHub));

            Assert.Empty(hubMethods);
        }

        [Fact]
        public void HubWithMethodsHasHubMethods()
        {
            var hubType = typeof(BaseMethodHub);
            var hubMethods = HubReflectionHelper.GetHubMethods(hubType);

            Assert.Equal(3, hubMethods.Count());
            Assert.Contains(hubMethods, m => m == hubType.GetMethod("VoidMethod"));
            Assert.Contains(hubMethods, m => m == hubType.GetMethod("IntMethod"));
            Assert.Contains(hubMethods, m => m == hubType.GetMethod("ArgMethod"));
        }

        [Fact]
        public void InheritedHubHasBaseHubMethodsAndOwnMethods()
        {
            var hubType = typeof(InheritedMethodHub);
            var hubMethods = HubReflectionHelper.GetHubMethods(hubType);

            Assert.Equal(4, hubMethods.Count());
            Assert.Contains(hubMethods, m => m == hubType.GetMethod("ExtraMethod"));
            Assert.Contains(hubMethods, m => m == hubType.GetMethod("VoidMethod"));
            Assert.Contains(hubMethods, m => m == hubType.GetMethod("IntMethod"));
            Assert.Contains(hubMethods, m => m == hubType.GetMethod("ArgMethod"));
        }

        private class EmptyHub : Hub
        {
        }

        private class BaseMethodHub : Hub
        {
            public void VoidMethod()
            {
            }

            public int IntMethod()
            {
                return 0;
            }

            public void ArgMethod(string str)
            {
            }

            // static is not supported as a Hub method
            public static void StaticMethod()
            {
            }

            // internal is not a Hub method
            internal void InternalMethod()
            {
            }

            // private is not a Hub method
            private void PrivateMethod()
            {
            }
        }

        private class InheritedMethodHub : BaseMethodHub
        {
            public int ExtraMethod(bool b)
            {
                return 2;
            }
        }
    }
}