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use Test::More tests => 60;
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use lib 't';
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use Data::Dumper;
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use DateTime;
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use_ok 'SL::Helper::DateTime';
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my $local_tz = DateTime::TimeZone->new(name => 'local');
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my $mon_012345 = DateTime->new(year => 2014, month => 6, day => 23, hour => 1, minute => 23, second => 45, time_zone => $local_tz);
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sub mon { DateTime->new(year => 2014, month => 6, day => 23) }
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sub tue { DateTime->new(year => 2014, month => 6, day => 24) }
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sub wed { DateTime->new(year => 2014, month => 6, day => 25) }
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sub thu { DateTime->new(year => 2014, month => 6, day => 26) }
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sub fri { DateTime->new(year => 2014, month => 6, day => 27) }
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sub sat { DateTime->new(year => 2014, month => 6, day => 28) }
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sub sun { DateTime->new(year => 2014, month => 6, day => 29) }
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is mon->add_businessdays(days => 5)->day_of_week, 1, "mon + 5 => mon";
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is mon->add_businessdays(days => 12)->day_of_week, 3, "mon + 12 => wed";
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is fri->add_businessdays(days => 2)->day_of_week, 2, "fri + 2 => tue";
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is tue->add_businessdays(days => 9)->day_of_week, 1, "tue + 9 => mon";
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is tue->add_businessdays(days => 8)->day_of_week, 5, "tue + 8 => fri";
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# same with 6day week
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is mon->add_businessdays(businessweek => 6, days => 5)->day_of_week, 6, "mon + 5 => sat (6dw)";
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is mon->add_businessdays(businessweek => 6, days => 12)->day_of_week, 1, "mon + 12 => mon (6dw)";
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is fri->add_businessdays(businessweek => 6, days => 2)->day_of_week, 1, "fri + 2 => mon (6dw)";
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is tue->add_businessdays(businessweek => 6, days => 9)->day_of_week, 5, "tue + 9 => fri (6dw)";
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is tue->add_businessdays(businessweek => 6, days => 8)->day_of_week, 4, "tue + 8 => thu (6dw)";
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# absolute dates
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is mon->add_businessdays(days => 5), mon->add(days => 7), "mon + 5 => mon (date)";
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is mon->add_businessdays(days => 12), mon->add(days => 16), "mon + 12 => wed (date)";
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is fri->add_businessdays(days => 2), fri->add(days => 4), "fri + 2 => tue (date)";
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is tue->add_businessdays(days => 9), tue->add(days => 13), "tue + 9 => mon (date)";
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is tue->add_businessdays(days => 8), tue->add(days => 10), "tue + 8 => fri (date)";
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# same with 6day week
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is mon->add_businessdays(businessweek => 6, days => 5), mon->add(days => 5), "mon + 5 => sat (date) (6dw)";
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is mon->add_businessdays(businessweek => 6, days => 12), mon->add(days => 14), "mon + 12 => mon (date) (6dw)";
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is fri->add_businessdays(businessweek => 6, days => 2), fri->add(days => 3), "fri + 2 => mon (date) (6dw)";
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is tue->add_businessdays(businessweek => 6, days => 9), tue->add(days => 10), "tue + 9 => fri (date) (6dw)";
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is tue->add_businessdays(businessweek => 6, days => 8), tue->add(days => 9), "tue + 8 => thu (date) (6dw)";
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# same with subtract
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is mon->subtract_businessdays(days => 5)->day_of_week, 1, "mon - 5 => mon";
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is mon->subtract_businessdays(days => 12)->day_of_week, 4, "mon - 12 => thu";
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is fri->subtract_businessdays(days => 2)->day_of_week, 3, "fri - 2 => wed";
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is tue->subtract_businessdays(days => 9)->day_of_week, 3, "tue - 9 => wed";
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is tue->subtract_businessdays(days => 8)->day_of_week, 4, "tue - 8 => thu";
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# same with 6day week
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is mon->subtract_businessdays(businessweek => 6, days => 5)->day_of_week, 2, "mon - 5 => tue (6dw)";
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is mon->subtract_businessdays(businessweek => 6, days => 12)->day_of_week, 1, "mon - 12 => mon (6dw)";
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is fri->subtract_businessdays(businessweek => 6, days => 4)->day_of_week, 1, "fri - 4 => mon (6dw)";
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is tue->subtract_businessdays(businessweek => 6, days => 9)->day_of_week, 5, "tue - 9 => fri (6dw)";
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is tue->subtract_businessdays(businessweek => 6, days => 8)->day_of_week, 6, "tue - 8 => sat (6dw)";
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# absolute dates
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is mon->subtract_businessdays(days => 5), mon->add(days => -7), "mon - 5 => mon (date)";
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is mon->subtract_businessdays(days => 12), mon->add(days => -18), "mon - 12 => thu (date)";
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is fri->subtract_businessdays(days => 2), fri->add(days => -2), "fri - 2 => wed (date)";
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is tue->subtract_businessdays(days => 9), tue->add(days => -13), "tue - 9 => wed (date)";
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is tue->subtract_businessdays(days => 8), tue->add(days => -12), "tue - 8 => thu (date)";
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# same with 6day week
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is mon->subtract_businessdays(businessweek => 6, days => 5), mon->add(days => -6), "mon - 5 => tue (date) (6dw)";
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is mon->subtract_businessdays(businessweek => 6, days => 12), mon->add(days => -14), "mon - 12 => mon (date) (6dw)";
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is fri->subtract_businessdays(businessweek => 6, days => 4), fri->add(days => -4), "fri - 4 => mon (date) (6dw)";
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is tue->subtract_businessdays(businessweek => 6, days => 9), tue->add(days => -11), "tue - 9 => fri (date) (6dw)";
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is tue->subtract_businessdays(businessweek => 6, days => 8), tue->add(days => -10), "tue - 8 => sat (date) (6dw)";
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# add with negative days?
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is mon->add_businessdays(businessweek => 6, days => -5), mon->add(days => -6), "mon - 5 => tue (date) (6dw)";
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is mon->add_businessdays(businessweek => 6, days => -12), mon->add(days => -14), "mon - 12 => mon (date) (6dw)";
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is fri->add_businessdays(businessweek => 6, days => -4), fri->add(days => -4), "fri - 4 => mon (date) (6dw)";
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is tue->add_businessdays(businessweek => 6, days => -9), tue->add(days => -11), "tue - 9 => fri (date) (6dw)";
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is tue->add_businessdays(businessweek => 6, days => -8), tue->add(days => -10), "tue - 8 => sat (date) (6dw)";
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# what if staring date falls into eekend?
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is sun->add_businessdays(days => 1), sun->add(days => 1), "1 day after sun is mon";
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is sat->add_businessdays(days => 1), sat->add(days => 2), "1 day after sut is mon";
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is sun->add_businessdays(days => -1), sun->add(days => -2), "1 day before sun is fri";
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is sat->add_businessdays(days => -1), sat->add(days => -1), "1 day before sut is fri";
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# parsing YYYY-MM-DD formatted strings
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is(DateTime->from_ymd(), undef, "no argument results in undef");
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is(DateTime->from_ymd(''), undef, "empty argument results in undef");
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is(DateTime->from_ymd('chunky bacon'), undef, "invalid argument results in undef");
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is(DateTime->from_ymd('2014-06-23'), $mon_012345->clone->truncate(to => 'day'), "2014-06-23 is parsed correctly");
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is(DateTime->from_ymd('2014-06-23')->strftime('%H%M%S'), '000000', "2014-06-23 is parsed correctly");
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# parsing YYYY-MM-DDTHH:MM:SS formatted strings
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is(DateTime->from_ymdhms(), undef, "no argument results in undef");
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is(DateTime->from_ymdhms(''), undef, "empty argument results in undef");
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is(DateTime->from_ymdhms('chunky bacon'), undef, "invalid argument results in undef");
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is(DateTime->from_ymdhms('2014-06-23T01:23:45'), $mon_012345, "2014-06-23T01:23:45 is parsed correctly");
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is(DateTime->from_ymdhms('2014-06-23 01:23:45'), $mon_012345, "2014-06-23 01:23:45 is parsed correctly");
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