NsplTest\ATest::testFlatMap PHP Метод

    public function testFlatMap()
    {
        $this->assertEquals([1, 2, 3, 4], flatMap(function ($v) {
            return [$v, $v + 1];
        }, [1, 3]));
        $this->assertEquals(['hello', 'world', 'answer', 'is', '42'], flatMap(function ($v) {
            return explode(' ', $v);
        }, ['hello world', 'answer is 42']));
        $this->assertEquals([1, 2, 3, 4], call_user_func(flatMap, function ($v) {
            return [$v, $v + 1];
        }, [1, 3]));
        $this->assertEquals('\\nspl\\a\\flatMap', flatMap);
    }