public function testMergeTypeAttributes6()
{
$t1 = new slSchemaType('t1');
$t1->learnAttributes(array('att1' => '23', 'att2' => '23'));
$t2 = new slSchemaType('t2');
$t2->learnAttributes(array('att1' => '23', 'att2' => '23'));
$t2->learnAttributes(array());
$t1->merge($t2);
$this->assertSame(array('att1', 'att2'), array_keys($t1->attributes));
$this->assertTrue($t1->attributes['att1']->optional);
$this->assertTrue($t1->attributes['att2']->optional);
}
