/**
* @covers Marando\AstroDate\Epoch::J2000
*/
public function testJ2000()
{
$epoch = Epoch::J2000();
$this->assertEquals(2000, $epoch->year);
$this->assertEquals(YearType::Julian(), $epoch->type);
$this->assertEquals(2451545.0, $epoch->jd, 'jd', 0.0001);
}
/**
* Creates a new epoch from a Julian year number
* @param float $year Year number in Julian years
*/
public static function J($year)
{
// Get JD of the epoch
$jd = static::J2000()->jd + ($year - 2000) * static::DaysJulianYear;
// Create and return new epoch
$epoch = new static($jd);
$epoch->type = YearType::Julian();
return $epoch;
}
/**
* @covers Marando\AstroDate\YearType::Julian
*/
public function testJulian()
{
$this->assertEquals(365.25, YearType::Julian()->days);
}
