dotnet-installer/test/Microsoft.DotNet.Tools.Tests.Utilities/Extensions/DirectoryInfoExtensions.cs

// Copyright (c) .NET Foundation and contributors. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

using System.IO;

namespace Microsoft.DotNet.TestFramework
{
    internal static class DirectoryInfoExtensions
    {
        public static bool Contains(this DirectoryInfo subject, FileSystemInfo target) => target.FullName.StartsWith(subject.FullName);

        public static DirectoryInfo GetDirectory(this DirectoryInfo subject, params string[] directoryNames) => new DirectoryInfo(Path.Combine(subject.FullName, Path.Combine(directoryNames)));

        public static FileInfo GetFile(this DirectoryInfo subject, string fileName) => new FileInfo(Path.Combine(subject.FullName, fileName));

        public static void EnsureExistsAndEmpty(this DirectoryInfo subject)
        {
            if (subject.Exists)
            {
                subject.Delete(true);
            }

            subject.Create();
        }
    }
}