using System.Reflection;
using System.Threading.Tasks;
using JetBrains.Annotations;
using Shouldly;
using Xunit;

namespace Volo.Abp.Threading
{
    public class AsyncHelper_Tests
    {
        [Fact]
        public void RunSync_Test_Without_Return_Value()
        {
            AsyncHelper.RunSync(MyTaskWithoutReturnValueAsync);
        }

        [Fact]
        public void RunSync_Test_With_Return_Value()
        {
            AsyncHelper.RunSync(() => MyTaskWithReturnValueAsync(42)).ShouldBe(42);
        }

        [Fact]
        public void IsAsync_Should_Work()
        {
            GetType().GetMethod(
                "MyTaskWithoutReturnValueAsync",
                BindingFlags.NonPublic | BindingFlags.Static
            ).IsAsync().ShouldBe(true);

            GetType().GetMethod(
                "MyTaskWithReturnValueAsync",
                BindingFlags.NonPublic | BindingFlags.Static
            ).IsAsync().ShouldBe(true);

            GetType().GetMethod(
                "MyTaskWithReturnValue2",
                BindingFlags.NonPublic | BindingFlags.Instance
            ).IsAsync().ShouldBe(false);
        }

        private static async Task MyTaskWithoutReturnValueAsync()
        {
            await Task.Delay(1);
        }

        private static async Task<int> MyTaskWithReturnValueAsync(int aNumber)
        {
            await Task.Delay(1);
            return aNumber;
        }

        [UsedImplicitly]
        private int MyTaskWithReturnValue2(int aNumber)
        {
            return aNumber;
        }
    }
}