通用跟踪模拟类

时间:2015-01-27 15:22:27

标签: mocking moops

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' );

这会产生:

$ 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,当我使用caller()快捷方式时,问题似乎是m始终返回around m,l ..

像这样定义类:

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, \@_ );
  }
};

有效,但写起来有点冗长和麻烦。

使用Moops有更好的选择吗?

1 个答案:

答案 0 :(得分:2)

就个人Moops或其他方式而言,我不相信任何可能会对其应用修饰符的方法caller。在这些修饰语中我也不相信它。你过分依赖方法修饰符的工作原理。 (Moo / Moose / Mouse之间会有所不同。)

你尝试过这样的事吗?

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

(或者使用Sub :: Util而不是Sub :: Identify。)