|
public isProperSuperset ( |
||
| $B | ||
| 리턴 | boolean | |
public function isProperSuperset(Set $B) : bool
{
$B_array = $B->asArray();
$A∩B = array_intersect_key($this->A, $B_array);
$A∖B = array_diff_key($B_array, $this->A);
return count($A∩B) === $B->length() && empty($A∖B) && $this != $B;
} /**
* @dataProvider dataProviderForIsProperSet
*/
public function testIsProperSuperset(array $A, array $B)
{
$setA = new Set($B);
$setB = new Set($A);
$this->assertFalse($setA->isProperSuperset($setB));
}