MathPHP\SetTheory\SetOperationsTest::testDifferenceWithObjects PHP Метод

    public function testDifferenceWithObjects()
    {
        $vector1 = new Vector([1, 2, 3]);
        $vector2 = new Vector([1, 2, 3]);
        $A = new Set([1, 2, $vector1]);
        $B = new Set([2, 3, $vector2]);
        $A∖B = $A->difference($B);
        $expected = new Set([1, $vector1]);
        $this->assertEquals($expected, $A∖B);
        $this->assertEquals($expected->asArray(), $A∖B->asArray());
        $A = new Set([1, 2, $vector1]);
        $B = new Set([2, 3, $vector2, $vector1]);
        $A∖B = $A->difference($B);
        $expected = new Set([1]);
        $this->assertEquals($expected, $A∖B);
        $this->assertEquals($expected->asArray(), $A∖B->asArray());
    }