class_docstr: Unittest class for code using slices.
  
  We skip tests for None step as it is equivalent to 1.
  
  TODO : add tests for 1 == step (None as step)
class_docstr_tok: ["Unittest","class","for","code","using","slices",".","We","skip","tests","for","None","step","as","it","is","equivalent","to","1",".","TODO",":","add","tests","for","1","==","step","(","None","as","step",")"]
code: def test_empty_slices(self):
      code = "def empty_slices(x): return x[100:], x[100::2]"
      self.run_test(
          code, numpy.arange(90), empty_slices=[NDArray[int, :]]
      )
  
imports: import numpy
  from pythran.typing import List, NDArray
  from pythran.tests import TestEnv
label_desc: Use image node_id 1 for calling the TestSlice obj's underlying member method code with example usage: obj.test_empty_slices() without return types