public void GetFilesForSingleFileShouldCreateList() { string path = "c:\\temp\\test.txt"; IList <string> files = _subject.SourceFile(path).GetFiles(); Assert.That(files, Is.Not.Null); Assert.That(files.Count, Is.EqualTo(1)); Assert.That(files[0], Is.EqualTo(path)); _fileSystemHelper.AssertWasNotCalled(x => x.FindInFoldersRecursively(path, "*.*")); }