Thanks again. So localtime()->strptime does behave differently.
So localtime()->strptime's handling of time zones is the underlying issue. Certainly these two should be equivalent, no?
#!/usr/bin/env perl
use strict;
use warnings;
use Test::More ('no_plan');
use Time::Piece;
$ENV{'TZ'} = 'America/Los_Angeles';
my @tests = (
['2017-06-19 10:07:42', '%Y-%m-%d %H:%M:%S'],
['2017-06-19 10:07:42-0700', '%Y-%m-%d %H:%M:%S%z'],
);
is($Time::Piece::VERSION, 1.31);
foreach my $test (@tests) {
my ($datestr, $fmt) = @$test;
my $t = localtime->strptime($datestr, $fmt);
is($t->epoch, 1497892062);
is($t->tzoffset, -25200);
is($t->strftime, 'Mon, 19 Jun 2017 10:07:42 PDT');
is($t->strftime('%Y-%m-%d %H:%M:%S'), $datestr);
}
Result
ok 1
ok 2
ok 3
ok 4
ok 5
not ok 6
# Failed test at ./try7 line 22.
# got: '1497917262'
# expected: '1497892062'
ok 7
not ok 8
# Failed test at ./try7 line 24.
# got: 'Mon, 19 Jun 2017 17:07:42 PDT'
# expected: 'Mon, 19 Jun 2017 10:07:42 PDT'
not ok 9
# Failed test at ./try7 line 25.
# got: '2017-06-19 17:07:42'
# expected: '2017-06-19 10:07:42-0700'
1..9
# Looks like you failed 3 tests of 9.
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