public async Task ExtractFileAsync_ByFileName() { using (var extractor = new SevenZipExtractor(@"TestData\multiple_files.7z")) { using (var fileStream = File.Create(TemporaryFile)) { await extractor.ExtractFileAsync("file1.txt", fileStream); } } Assert.AreEqual(1, Directory.GetFiles(OutputDirectory).Length); Assert.AreEqual("file1", File.ReadAllText(TemporaryFile)); }