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, "*.*"));
}