public async Task Test_ExtractionHonorsFileTimestamp() { // Arrange var package = new PackageIdentity("packageA", new NuGetVersion("2.0.3")); var entryModifiedTime = new DateTimeOffset(1985, 11, 20, 12, 0, 0, TimeSpan.FromHours(-7.0)).DateTime; using (var packagesDirectory = TestFileSystemUtility.CreateRandomTestFolder()) { var pathResolver = new VersionFolderPathResolver(packagesDirectory); var packageFileInfo = await TestPackages.GeneratePackageAsync( packagesDirectory, package.Id, package.Version.ToNormalizedString(), entryModifiedTime, "lib/net45/A.dll"); var versionFolderPathContext = new VersionFolderPathContext( package, packagesDirectory, NullLogger.Instance, packageSaveMode: PackageSaveMode.Defaultv3, xmlDocFileSaveMode: XmlDocFileSaveMode.None); // Act using (var packageFileStream = packageFileInfo.OpenRead()) { await PackageExtractor.InstallFromSourceAsync( stream => packageFileStream.CopyToAsync(stream), versionFolderPathContext, CancellationToken.None); } // Assert var packageVersionDirectory = pathResolver.GetInstallPath(package.Id, package.Version); AssertDirectoryExists(packageVersionDirectory); var dllPath = Path.Combine(packageVersionDirectory, "lib", "net45", "A.dll"); var dllFileInfo = new FileInfo(dllPath); AssertFileExists(dllFileInfo.FullName); Assert.Equal(entryModifiedTime, dllFileInfo.LastWriteTime); } }