I think I had around 100 night flights over 30+ years when I did a commercial check ride (which I did just for fun at the time). But I learned that a picky examiner can tear your documentation to pieces if he wants to. For example, "How do I, the examiner, know that both the takeoff and the landing occurred at night, and not just one of them? How do I know that it was legally 'night' when you did it? How do I know you were solo when you just logged it as PIC? How do I know that the control tower was actually 'operating' at that time?" Those are all potential documentation pitfalls, even though the airman knows that those flights qualified. Fortunately, out of all those flights I was able to come up the required 10, mostly because I had a series of solo night currency flights logged with all the correct information. So I think a person looking for a commercial check ride might be wise to do it as
RyanB suggested above.
As far as documenting that it was "in the traffic pattern" I suppose that the examiner could deny a straight in approach as being "in the traffic pattern" for purposes of the requirement.