Bug 13242: Add a UT to t/DateUtils.t for testing DateTime bug

A bug in DateTime slow down drastically date parsing when the dates are in the
far distant future:

https://metacpan.org/pod/DateTime#Determining-the-Local-Time-Zone-Can-Be-Slow

This UT tests this situation which affects Koha::DateUtils function
dt_from_string() and output_pref().

TO TEST:
- Apply the patch containing the UT
- prove -v t/DateUtils.t
- You see that parsing a 9999-01-01 that take forever (ie more than 1s)
- Apply the patch containing the fix
- prove -v t/DateUtils.t
- No more complain.

Followed test plan. Test behaves as expected.
Signed-off-by: Marc Véron <veron@veron.ch>

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Works as described - check-ins are now much faster.
Passes tests and QA script.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>

diff --git a/t/DateUtils.t b/t/DateUtils.t
index 9afddc1..2439127 100755 (executable)
--- a/t/DateUtils.t
+++ b/t/DateUtils.t
@@ -1,12 +1,11 @@
-use strict;
-use warnings;
-use 5.010;
+use Modern::Perl;
 use DateTime;
 use DateTime::TimeZone;
 
 use C4::Context;
-use Test::More tests => 34;
+use Test::More tests => 41;
 use Test::MockModule;
+use Time::HiRes qw/ gettimeofday /;
 
 BEGIN { use_ok('Koha::DateUtils'); }
 
@@ -77,6 +76,17 @@ isa_ok( $new_dt, 'DateTime', 'Create DateTime with different timezone' );
 cmp_ok( $new_dt->ymd(), 'eq', $testdate_iso,
     'Returned Dublin object matches input' );
 
+for ( qw/ 2014-01-01 2100-01-01 9999-01-01 / ) {
+    my $duration = gettimeofday();
+    $new_dt = dt_from_string($_, 'iso', $dear_dirty_dublin);
+    $duration = gettimeofday() - $duration;
+    cmp_ok $duration, '<', 1, "Create DateTime with dt_from_string() for $_ with TZ in less than 1s";
+    $duration = gettimeofday();
+    output_pref( { dt => $new_dt } );
+    $duration = gettimeofday() - $duration;
+    cmp_ok $duration, '<', 1, "Create DateTime with output_pref() for $_ with TZ in less than 1s";
+}
+
 $new_dt = dt_from_string( '2011-06-16 12:00', 'sql' );
 isa_ok( $new_dt, 'DateTime', 'Create DateTime from (mysql) sql' );
 cmp_ok( $new_dt->ymd(), 'eq', $testdate_iso, 'sql returns correct date' );
@@ -106,6 +116,10 @@ cmp_ok( $dt0->ymd(), 'eq', $ymd, 'Returned object corrects iso day 0' );
 $dt0 = dt_from_string( '0000-00-00', 'iso' );
 is( $dt0, undef, "undefined returned for 0 iso date" );
 
+# Return undef if passed mysql 9999-* date
+my $dt9999 = dt_from_string( '9999-12-31' );
+is( $dt9999->ymd(), '9999-12-31', "dt_from_string should return a DateTime object for 9999-12-31" );
+
 my $formatted = format_sqldatetime( '2011-06-16 12:00:07', 'metric', '24hr' );
 cmp_ok( $formatted, 'eq', '16/06/2011 12:00', 'format_sqldatetime conversion' );