Parkour\TraverseTest::testMap PHP Method

    public function testMap()
    {
        $data = ['a' => 1, 'b' => 2];
        $closure = $this->closure([[1, 'a', 2], [2, 'b', 4]]);
        $expected = ['a' => 2, 'b' => 4];
        $this->assertEquals($expected, Traverse::map($data, $closure));
    }