dotnet-installer/test/Microsoft.DotNet.Tools.Tests.Utilities/Mock/FileSystemMockBuilder.cs

100 lines
2.7 KiB
C#

// 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.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Microsoft.Extensions.EnvironmentAbstractions;
namespace Microsoft.Extensions.DependencyModel.Tests
{
class FileSystemMockBuilder
{
private Dictionary<string, string> _files = new Dictionary<string, string>();
internal static IFileSystem Empty { get; } = Create().Build();
public static FileSystemMockBuilder Create()
{
return new FileSystemMockBuilder();
}
public FileSystemMockBuilder AddFile(string name, string content = "")
{
_files.Add(name, content);
return this;
}
public FileSystemMockBuilder AddFiles(string basePath, params string[] files)
{
foreach (var file in files)
{
AddFile(Path.Combine(basePath, file));
}
return this;
}
internal IFileSystem Build()
{
return new FileSystemMock(_files);
}
private class FileSystemMock : IFileSystem
{
public FileSystemMock(Dictionary<string, string> files)
{
File = new FileMock(files);
Directory = new DirectoryMock(files);
}
public IFile File { get; }
public IDirectory Directory { get; }
}
private class FileMock : IFile
{
private Dictionary<string, string> _files;
public FileMock(Dictionary<string, string> files)
{
_files = files;
}
public bool Exists(string path)
{
return _files.ContainsKey(path);
}
public string ReadAllText(string path)
{
string text;
if (!_files.TryGetValue(path, out text))
{
throw new FileNotFoundException(path);
}
return text;
}
public Stream OpenRead(string path)
{
return new MemoryStream(Encoding.UTF8.GetBytes(ReadAllText(path)));
}
}
private class DirectoryMock : IDirectory
{
private Dictionary<string, string> _files;
public DirectoryMock(Dictionary<string, string> files)
{
_files = files;
}
public bool Exists(string path)
{
return _files.Keys.Any(k => k.StartsWith(path));
}
}
}
}