linux-Test :: MockTime在某些情况下不模拟时间
作者:互联网
我有一个非常简单的脚本,该脚本使用Test :: MockTime模拟时间,但是时间调用的输出在代码的两部分中有所不同.
这是脚本:
package mocker;
use strict;
use warnings;
sub abcd {
print "in abcd, time is " . time . "\n";
}
BEGIN {
use Test::MockTime qw(set_absolute_time restore_time);
set_absolute_time(0);
};
sub do_mock {
print "Current epoch in do_mock is: " . time . "\n";
abcd;
restore_time();
}
1;
我在脚本中调用了ocker :: do_mock:
use strict;
use warnings;
use mocker;
mocker::do_mock;
我期望两个打印语句中的当前时间输出都为“ 0”,但奇怪的是,我有以下输出:
Current epoch in do_mock is: 0
in abcd, time is 1450343385
那么,为什么abcd时间恢复为当前时间?
解决方法:
Test :: MockTime的documentation解释说:“它在编译时会覆盖本地时间,gmtime和时间.”所以:
print "Before: " . time; # Uses CORE::time()
use Test::MockTime; # Override time()
print "After: " . time; # Uses overridden time()
您可以使用B::Deparse查看此内容:
$perl -MO=Deparse foo
print 'Before: ' . time;
use Test::MockTime;
print 'After: ' . &CORE::GLOBAL::time();
foo syntax OK
第二次调用time()实际上使用CORE :: GLOBAL :: time(),它是被覆盖的版本.
要解决此问题,请在调用time()之前确保已编译Test :: MockTime:
package mocker;
use strict;
use warnings;
use Test::MockTime qw(set_absolute_time restore_time);
sub abcd {
print "in abcd, time is " . time . "\n";
}
BEGIN {
set_absolute_time(0);
};
sub do_mock {
print "Current epoch in do_mock is: " . time . "\n";
abcd;
restore_time();
}
1;
标签:unit-testing,mocking,testing,linux,perl 来源: https://codeday.me/bug/20191119/2035028.html