// 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 Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Scripting;
using Microsoft.CodeAnalysis.Scripting;
using Microsoft.CodeAnalysis.VisualBasic;
using Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.CSharp.Scripting.UnitTests
{
    public class ScriptOptionsTests : TestBase
    {
        [Fact]
        public void WithLanguageVersion()
        {
            var options = ScriptOptions.Default.WithLanguageVersion(LanguageVersion.CSharp8);
            Assert.Equal(LanguageVersion.CSharp8, ((CSharpParseOptions)options.ParseOptions).LanguageVersion);
        }
 
        [Fact]
        public void WithLanguageVersion_SameValueTwice_DoesNotCreateNewInstance()
        {
            var options = ScriptOptions.Default.WithLanguageVersion(LanguageVersion.CSharp8);
            Assert.Same(options, options.WithLanguageVersion(LanguageVersion.CSharp8));
        }
 
        [Fact]
        public void WithLanguageVersion_NonCSharpParseOptions_Throws()
        {
            var options = ScriptOptions.Default.WithParseOptions(new VisualBasicParseOptions(kind: SourceCodeKind.Script, languageVersion: VisualBasic.LanguageVersion.Latest));
            Assert.Throws<InvalidOperationException>(() => options.WithLanguageVersion(LanguageVersion.CSharp8));
        }
    }
}