public testADiffItselfIsEmptySet ( |
||
$A |
public function testADiffItselfIsEmptySet(Set $A)
{
$Ø = new Set();
$A∖A = $A->difference($A);
$this->assertEquals($Ø, $A∖A);
$this->assertEquals($Ø->asArray(), $A∖A->asArray());
}