// 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.
 
using System;
using System.Linq;
using Microsoft.CodeAnalysis.Host;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.UnitTests;
 
[UseExportProvider]
public sealed class DynamicFileInfoProviderMefTests : TestBase
{
    [Fact]
    public void TestFileExtensionsMetadata()
    {
        var lazy = GetDynamicFileInfoProvider();
 
        Assert.Equal(2, lazy.Metadata.Extensions.Count());
        AssertEx.SetEqual(["cshtml", "vbhtml"], lazy.Metadata.Extensions);
    }
 
    [Fact]
    public void TestInvalidArgument1()
    {
        Assert.Throws<ArgumentException>(() =>
        {
            new ExportDynamicFileInfoProviderAttribute();
        });
    }
 
    [Fact]
    public void TestInvalidArgument2()
    {
        Assert.Throws<ArgumentException>(() =>
        {
            new FileExtensionsMetadata();
        });
    }
 
    internal static Lazy<IDynamicFileInfoProvider, FileExtensionsMetadata> GetDynamicFileInfoProvider()
    {
        var composition = TestComposition.Empty.AddParts(typeof(TestDynamicFileInfoProviderThatProducesNoFiles));
        return composition.ExportProviderFactory.CreateExportProvider().GetExport<IDynamicFileInfoProvider, FileExtensionsMetadata>();
    }
}