iter\IterFnTest::testNot PHP Метод

    public function testNot()
    {
        $constFalse = fn\not(function () {
            return true;
        });
        $constTrue = fn\not(function () {
            return false;
        });
        $invert = fn\not(function ($bool) {
            return $bool;
        });
        $nand = fn\not(fn\operator('&&'));
        $this->assertFalse($constFalse());
        $this->assertTrue($constTrue());
        $this->assertFalse($invert(true));
        $this->assertTrue($invert(false));
        $this->assertFalse($nand(true, true));
        $this->assertTrue($nand(true, false));
    }