泛型跟踪模拟类

Question

我正在尝试使用moops构建一个方便的模拟类：

#!/usr/bin/env perl
use Modern::Perl '2014';
use Moops;
use Test::More;

class aClass {
  method m {}
  method l {}
};

class NotWorkingMockAClass
extends aClass {

  has methodCallLog => (
    is  => 'rw',
    default => sub { [] },
    isa     => ArrayRef
  );

  around m, l {
    push $self->methodCallLog, (caller(0))[3] =~ m/::(\w+)$/;
    $next->($self, @_ );
  }

};

my $mac = NotWorkingMockAClass->new();
$mac->m();
$mac->l();
$mac->m();

is( ($mac->methodCallLog)->[0], 'm', 'mcl[0] == m' );
is( ($mac->methodCallLog)->[1], 'l', 'mcl[1] == l' );
is( ($mac->methodCallLog)->[2], 'm', 'mcl[2] == m' );

这产生了：

$ perl mocking.pl 
ok 1 - mcl[0] == m
not ok 2 - mcl[1] == l
#   Failed test 'mcl[1] == l'
#   at mocking.pl line 33.
#          got: 'm'
#     expected: 'l'
ok 3 - mcl[2] == m

因此，问题似乎是，当我使用caller()快捷方式时，m总是返回around m,l ..。

类的定义如下：

class WorkingMockAClass
extends aClass {

  has methodCallLog => (
    is  => 'rw',
    default => sub { [] },
    isa     => ArrayRef
  );

  method _logAndDispatch( CodeRef $next, ArrayRef $args ){
    push $self->methodCallLog, (caller(1))[3] =~ m/::(\w)$/;
    $next->($self, @$args );
  }
  around m {
    $self->_logAndDispatch( $next, \@_ );
  }

  around l {
    $self->_logAndDispatch( $next, \@_ );
  }
};

可以工作，但是编写起来有点冗长和繁琐。

有更好的选择来实现这样的目标吗？

Answer 1

就我个人而言，无论是Moops还是其他方面，我都不相信caller有任何可能会应用修饰符的方法。我也不相信这些修饰语。您太依赖于方法修饰符的内部结构。(Moo/Moose/老鼠之间会有不同。)

你试过这样的东西吗？

push @{ $self->methodCallLog }, Sub::Identify::sub_name($next);

(或者使用Sub::Util代替Sub：：标识)