I think the problem is with your use of apply_roles_to_object. I did a little test and if you change the method to apply_roles_to_package it works they way you expect: 
print "Using apply_roles_to_object\n";
my $test_1 = File->new;
print "test_1->render\n";
$test_1->render;
Role::Tiny->apply_roles_to_object($test_1, 'Draw');
print "test_1->render after apply_roles_to_object\n";
$test_1->render;

print "\n\n";

print "Using apply_roles_to_package\n";
my $test_2 = File->new;
print "test_2->render\n";
$test_2->render;
Role::Tiny->apply_roles_to_package('File', 'Draw');
print "test_2->render after apply_roles_to_package\n";
$test_2->render;

[download]
Output: 
Using apply_roles_to_object
test_1->render
This is package 'File' - render
test_1->render after apply_roles_to_object
This is package 'Draw' - render


Using apply_roles_to_package
test_2->render
This is package 'File' - render
test_2->render after apply_roles_to_package
This is package 'File' - render

[download]

In reply to Re: Role::Tiny not behaving as expected by tangent
in thread Role::Tiny not behaving as expected by webmistress_ming

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, details, 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, summary, 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.