htmlgen\test\MapTest::test_map_array_returns_array PHP Метод

    public function test_map_array_returns_array()
    {
        $input = ['x', 'y', 'z'];
        $expected = [[0, 'x'], [1, 'y'], [2, 'z']];
        $actual = map($input, function ($v, $k) {
            return [$k, $v];
        });
        $this->assertSame($expected, $actual);
    }