わかったようでわかってない。

use strict;
use warnings;
use Test::More;

die bless {}, __PACKAGE__;

done_testing;

というのを作ってperlで実行するとこういう感じのエラーが出る。

$ perl t/01_exception.t
main=HASH(0x7fb1ba002eb8)

proveで実行すると"main=HASH(0x7fb1ba002eb8)"みたいなのが出てこない。なんでや。

$ prove t/01_exception.t
[17:08:21] t/01_exception.t .. Dubious, test returned 255 (wstat 65280, 0xff00)
No subtests run 
[17:08:21]

Test Summary Report
-------------------
t/01_exception.t (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: No plan found in TAP output
Files=1, Tests=0,  0 wallclock secs ( 0.05 usr  0.01 sys +  0.06 cusr  0.00 csys =  0.12 CPU)
Result: FAIL

die "@{[bless {}, __PACKAGE__]}";ってやったら出てきた。

$ prove t/01_exception.t
[17:17:14] t/01_exception.t .. main=HASH(0x7fda29002eb8) at t/01_exception.t line 5.
[17:17:14] t/01_exception.t .. Dubious, test returned 255 (wstat 65280, 0xff00)
No subtests run 
[17:17:14]

Test Summary Report
-------------------
t/01_exception.t (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: No plan found in TAP output
Files=1, Tests=0,  0 wallclock secs ( 0.05 usr  0.01 sys +  0.06 cusr  0.00 csys =  0.12 CPU)
Result: FAIL

dieの上にpass;を書くとそれっぽいのが出てきた。

$ prove t/01_exception.t
[17:24:11] t/01_exception.t .. 1/? main=HASH(0x7fc5f9002eb8)# Tests were run but no plan was declared and done_testing() was not seen.
[17:24:11] t/01_exception.t .. Dubious, test returned 255 (wstat 65280, 0xff00)
All 1 subtests passed 
[17:24:11]

Test Summary Report
-------------------
t/01_exception.t (Wstat: 65280 Tests: 1 Failed: 0)
  Non-zero exit status: 255
  Parse errors: No plan found in TAP output
Files=1, Tests=1,  0 wallclock secs ( 0.06 usr  0.01 sys +  0.08 cusr  0.00 csys =  0.15 CPU)
Result: FAIL

わからない。

追記：
prove -vすればええんちゃうかな〜って思ってやってみたらできた。

$ prove -v t/01_exception.t 
[21:12:41] t/01_exception.t .. main=HASH(0x7f8168802eb8)Dubious, test returned 255 (wstat 65280, 0xff00)
No subtests run 
[21:12:41]

Test Summary Report
-------------------
t/01_exception.t (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: No plan found in TAP output
Files=1, Tests=0,  0 wallclock secs ( 0.03 usr  0.01 sys +  0.03 cusr  0.00 csys =  0.07 CPU)
Result: FAIL