public function testProps() { $assoc = ['x' => 100, 'y' => 200, 'z' => 300]; $this->assertEquals([200, 300], P::toArray(P::props(['y', 'z'], $assoc))); $this->assertEquals([200, NULL, 300], P::toArray(P::props(['y', 'a', 'z'], $assoc))); }