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MDL-49828 timezones: add tests for DST switching
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Petr Skoda committed Apr 12, 2015
1 parent 91bafd7 commit 980a3a1
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73 changes: 73 additions & 0 deletions lib/tests/moodlelib_test.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1357,6 +1357,79 @@ public function test_userdate() {
}
}

/**
* Make sure the DST changes happen at the right time in Moodle.
*/
public function test_dst_changes() {
// DST switching in Prague.
// From 2AM to 3AM in 1989.
$date = new DateTime('1989-03-26T01:59:00+01:00');
$this->assertSAMe('Sunday, 26 March 1989, 1:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
$date = new DateTime('1989-03-26T02:01:00+01:00');
$this->assertSame('Sunday, 26 March 1989, 3:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
// From 3AM to 2AM in 1989 - not the same as the west Europe.
$date = new DateTime('1989-09-24T01:59:00+01:00');
$this->assertSame('Sunday, 24 September 1989, 2:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
$date = new DateTime('1989-09-24T02:01:00+01:00');
$this->assertSame('Sunday, 24 September 1989, 2:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
// From 2AM to 3AM in 2014.
$date = new DateTime('2014-03-30T01:59:00+01:00');
$this->assertSame('Sunday, 30 March 2014, 1:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
$date = new DateTime('2014-03-30T02:01:00+01:00');
$this->assertSame('Sunday, 30 March 2014, 3:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
// From 3AM to 2AM in 2014.
$date = new DateTime('2014-10-26T01:59:00+01:00');
$this->assertSame('Sunday, 26 October 2014, 2:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
$date = new DateTime('2014-10-26T02:01:00+01:00');
$this->assertSame('Sunday, 26 October 2014, 2:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
// From 2AM to 3AM in 2020.
$date = new DateTime('2020-03-29T01:59:00+01:00');
$this->assertSame('Sunday, 29 March 2020, 1:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
$date = new DateTime('2020-03-29T02:01:00+01:00');
$this->assertSame('Sunday, 29 March 2020, 3:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
// From 3AM to 2AM in 2020.
$date = new DateTime('2020-10-25T01:59:00+01:00');
$this->assertSame('Sunday, 25 October 2020, 2:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));
$date = new DateTime('2020-10-25T02:01:00+01:00');
$this->assertSame('Sunday, 25 October 2020, 2:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Europe/Prague'));

// DST switching in NZ.
// From 3AM to 2AM in 2015.
$date = new DateTime('2015-04-05T02:59:00+13:00');
$this->assertSame('Sunday, 5 April 2015, 2:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Pacific/Auckland'));
$date = new DateTime('2015-04-05T03:01:00+13:00');
$this->assertSame('Sunday, 5 April 2015, 2:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Pacific/Auckland'));
// From 2AM to 3AM in 2009.
$date = new DateTime('2015-09-27T01:59:00+12:00');
$this->assertSame('Sunday, 27 September 2015, 1:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Pacific/Auckland'));
$date = new DateTime('2015-09-27T02:01:00+12:00');
$this->assertSame('Sunday, 27 September 2015, 3:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Pacific/Auckland'));

// DST switching in Perth.
// From 3AM to 2AM in 2009.
$date = new DateTime('2008-03-30T01:59:00+08:00');
$this->assertSame('Sunday, 30 March 2008, 2:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Australia/Perth'));
$date = new DateTime('2008-03-30T02:01:00+08:00');
$this->assertSame('Sunday, 30 March 2008, 2:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Australia/Perth'));
// From 2AM to 3AM in 2009.
$date = new DateTime('2008-10-26T01:59:00+08:00');
$this->assertSame('Sunday, 26 October 2008, 1:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Australia/Perth'));
$date = new DateTime('2008-10-26T02:01:00+08:00');
$this->assertSame('Sunday, 26 October 2008, 3:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'Australia/Perth'));

// DST switching in US.
// From 2AM to 3AM in 2014.
$date = new DateTime('2014-03-09T01:59:00-05:00');
$this->assertSame('Sunday, 9 March 2014, 1:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'America/New_York'));
$date = new DateTime('2014-03-09T02:01:00-05:00');
$this->assertSame('Sunday, 9 March 2014, 3:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'America/New_York'));
// From 3AM to 2AM in 2014.
$date = new DateTime('2014-11-02T01:59:00-04:00');
$this->assertSame('Sunday, 2 November 2014, 1:59', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'America/New_York'));
$date = new DateTime('2014-11-02T02:01:00-04:00');
$this->assertSame('Sunday, 2 November 2014, 1:01', userdate($date->getTimestamp(), '%A, %d %B %Y,%k:%M', 'America/New_York'));
}

public function test_make_timestamp() {
global $USER, $CFG, $DB;
$this->resetAfterTest();
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