public function test_Slice_NegativeIndex()
{
$tokens = (new \Flow\JSONPath\JSONPathLexer('[-1]'))->parseExpression();
$this->assertEquals(JSONPathToken::T_SLICE, $tokens[0]->type);
$this->assertEquals(['start' => -1, 'end' => null, 'step' => null], $tokens[0]->value);
}