add spec for Symbol#name to be frozen?

[lxxxvi]

Hello 👋

Here's my attempt on Symbol#name from #823

Symbol#name has been added, which returns the name of the symbol
if it is named. The returned string is frozen. Feature #16150

I am looking forward to getting feedback.

[eregon]

Looks good, but we should also test that the returned String is always the same String, even for dynamically generated symbols like say :"foo#{3*4} and :"foo#{2*3*2}".

[lxxxvi]

@eregon 👍 Thanks for the feedback. Added new assertions:

      :ruby.name.should == "ruby"
      :ルビー.name.should == "ルビー"
      :"ruby_#{1+2}".name.should == "ruby_3"

Not sure about the Japanese 🇯🇵 example, I thought it would be interesting to assert for UTF-8 too... 🙃 what do you think?

[eregon]

I meant we should test it's the same String instance for a given Symbol, so something like:

:"ruby_#{1+2}".name.should.equal?(:ruby_3.name)

Probably a good idea to test non-ASCII well as you did, yes.

[lxxxvi]

Oh, I think get it now. We want to check if it's the same String instance, so same object_id, right? I adjusted the specs accordingly.

Also, I was wondering if it'd make sense adding a test for symbols having characters like \n in it?

:"foo\nbar"

[eregon]

Looks good, thanks for the new spec!