// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#nullable disable

using System;
using System.Collections.Generic;
using Microsoft.CodeAnalysis.DocumentHighlighting;
using Microsoft.CodeAnalysis.ExternalAccess.FSharp.DocumentHighlighting;
using Microsoft.CodeAnalysis.ExternalAccess.FSharp.Internal.DocumentHighlighting;
using Roslyn.Utilities;
using Xunit;

namespace Microsoft.CodeAnalysis.ExternalAccess.FSharp.UnitTests
{
    public class FSharpHighlightSpanKindTests
    {
        public static IEnumerable<object[]> enumValues()
        {
            foreach (var number in Enum.GetValues(typeof(FSharpHighlightSpanKind)))
            {
                yield return new object[] { number };
            }
        }

        internal static HighlightSpanKind GetExpectedHighlightSpanKind(FSharpHighlightSpanKind kind)
        {
            switch (kind)
            {
                case FSharpHighlightSpanKind.None:
                    {
                        return HighlightSpanKind.None;
                    }

                case FSharpHighlightSpanKind.Definition:
                    {
                        return HighlightSpanKind.Definition;
                    }

                case FSharpHighlightSpanKind.Reference:
                    {
                        return HighlightSpanKind.Reference;
                    }

                case FSharpHighlightSpanKind.WrittenReference:
                    {
                        return HighlightSpanKind.WrittenReference;
                    }

                default:
                    {
                        throw ExceptionUtilities.UnexpectedValue(kind);
                    }
            }
        }

        [Theory]
        [MemberData(nameof(enumValues))]
        internal void MapsCorrectly(FSharpHighlightSpanKind kind)
        {
            var actual = FSharpHighlightSpanKindHelpers.ConvertTo(kind);
            var expected = GetExpectedHighlightSpanKind(kind);
            Assert.Equal(expected, actual);
        }
    }
}
