Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
appears (to me) to be digging into the guts of perl (via Scalar::Util::blessed()) to prevent their users from using fairly ordinary OO techniques to bypass their checks

Actually not. You could remove the use of Scalar::Util::blessed() and the code would function identically. Test::Deep is using isa() to enable users to extend the Test::Deep::Cmp functionality using ordinary OO techniques.

If they had actually used blessed() in a way that prevents such extending then the "breaking change" would have been avoided. Replace the new code:

if (! $Expects and Scalar::Util::blessed($d1) and $d1->isa("Test::Deep +::Cmp"))

with code that looks too closely under the covers:

if (! $Expects and Scalar::Util::blessed($d1) eq "Test::Deep::Cmp")

and the fact that isa() was intentionally broken in order to do a sloppy hack to subvert draconian type checking would not have mattered.

- tye        


In reply to Re^4: Mocking isa under Test::Deep (blessed vs isa) by tye
in thread Mocking isa under Test::Deep by choroba

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others having an uproarious good time at the Monastery: (8)
    As of 2019-11-15 23:09 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Strict and warnings: which comes first?



      Results (85 votes). Check out past polls.

      Notices?