/**
* Test aritmatic operations
*
*/
function test_intersect_union()
{
// intersection()
// union()
// 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 0 0 0
// 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4
//
// A |- - - - - - - - - -|
// B |-|
// C |- - - - - - - - -|
// D |- - - -|
$timespanA = Month::startingDuration(DateAndTime::withYearMonthDayHourMinuteSecondOffset(2005, 5, 4, 15, 25, 10, Duration::withHours(-4)), Duration::withDays(10));
$timespanB = Month::startingDuration(DateAndTime::withYearMonthDayHourMinuteSecondOffset(2005, 5, 10, 12, 0, 0, Duration::withHours(-4)), Duration::withDays(1));
$timespanC = Month::startingEnding(DateAndTime::withYearMonthDay(2005, 5, 20), DateAndTime::withYearMonthDay(2005, 5, 29));
$timespanD = Month::startingEnding(DateAndTime::withYearMonthDay(2005, 6, 1), DateAndTime::withYearMonthDay(2005, 6, 6));
// intersection()
$this->assertTrue($timespanA->isEqualTo($timespanA->intersection($timespanB)));
$this->assertTrue($timespanA->isEqualTo($timespanA->intersection($timespanC)));
$this->assertEqual($timespanA->intersection($timespanD), NULL);
// union()
$temp = Timespan::startingEnding(DateAndTime::withYearMonthDay(2005, 5, 1), DateAndTime::withYearMonthDay(2005, 6, 1));
$this->assertTrue($temp->isEqualTo($timespanA->union($timespanB)));
$temp = Timespan::startingEnding(DateAndTime::withYearMonthDay(2005, 5, 1), DateAndTime::withYearMonthDay(2005, 6, 1));
$this->assertTrue($temp->isEqualTo($timespanA->union($timespanC)));
$temp = Timespan::startingEnding(DateAndTime::withYearMonthDay(2005, 5, 1), DateAndTime::withYearMonthDay(2005, 7, 1));
$this->assertTrue($temp->isEqualTo($timespanA->union($timespanD)));
}