public function _testDeepFunction() { $is = ['f some', 'e 49r ' => 'rf r ', 'er' => [['ee' => ['rr ' => ' tt ']]]]; $expected = ['f some', 'e 49r ' => 'rf r', 'er' => [['ee' => ['rr ' => 'tt']]]]; $result = Utility::deep('trim', $is); $this->assertSame($expected, $result); }