Roomify\Bat\Constraint\DateConstraint::toString PHP Метод

    public function toString()
    {
        $text = '';
        $args = array();
        $start_date = FALSE;
        $end_date = FALSE;
        // Date range constraint variables.
        if ($this->start_date !== NULL) {
            $start_date = $this->start_date->format('Y-m-d');
        }
        if ($this->start_date !== NULL) {
            $end_date = $this->end_date->format('Y-m-d');
        }
        // Specify a date range constraint.
        if ($start_date && $end_date) {
            $text = 'From @start_date to @end_date';
            $args['@start_date'] = $start_date;
            $args['@end_date'] = $end_date;
        }
        // Specify the start/end constraint.
        if ($start_date && $end_date) {
            $text = 'From @start_date to @end_date';
        }
        return array('text' => $text, 'args' => $args);
    }

 /**
  * Test to String on Date Constraint.
  */
 public function testToStringDateConstraint()
 {
     $u1 = new Unit(1, 10, array());
     $checkin_day = 1;
     $units = array($u1);
     // Imagine we are testing on 2016-01-01, and do not allow creating an event
     // until 2 days from now, and not after six months.
     $sd = new \DateTime('2016-01-03 00:00');
     $ed = new \DateTime('2016-06-01 00:00');
     $store = new SqlLiteDBStore($this->pdo, 'availability_event', SqlDBStore::BAT_STATE);
     $calendar = new Calendar($units, $store);
     // Constraint with Dates
     $date_constraint = new DateConstraint(array($u1), $sd, $ed);
     $string = $date_constraint->toString();
     $this->assertEquals($string['text'], 'From @start_date to @end_date');
     $this->assertEquals($string['args']['@start_date'], '2016-01-03');
     $this->assertEquals($string['args']['@end_date'], '2016-06-01');
     $constraints = array($date_constraint);
     // Test an event starting on the second.
     $sd1 = new \DateTime('2016-01-02 12:00');
     $ed1 = new \DateTime('2016-01-10 13:12');
     $response = $calendar->getMatchingUnits($sd1, $ed1, array(10, 11), array());
     $valid_unit_ids = array_keys($response->getIncluded());
     $this->assertEquals($valid_unit_ids[0], 1);
     // Applying the constraint the unit 1 should be no longer valid.
     $response->applyConstraints($constraints);
     $invalid_unit_ids = array_keys($response->getExcluded());
     $this->assertEquals($invalid_unit_ids[0], 1);
     // Test an event ending in July.
     $sd1 = new \DateTime('2016-05-02 12:00');
     $ed1 = new \DateTime('2016-07-10 13:12');
     $response = $calendar->getMatchingUnits($sd1, $ed1, array(10, 11), array());
     $valid_unit_ids = array_keys($response->getIncluded());
     $this->assertEquals($valid_unit_ids[0], 1);
     // Applying the constraint the unit 1 should be no longer valid.
     $response->applyConstraints($constraints);
     $invalid_unit_ids = array_keys($response->getExcluded());
     $this->assertEquals($invalid_unit_ids[0], 1);
 }