old_contents: import pytest
  import sys
  
  
  def test_1(m):
      m.touch("/somefile")  # NB: is found with or without initial /
      m.touch("afiles/and/anothers")
      assert m.find("") == ["afiles/and/anothers", "somefile"]
      assert list(m.get_mapper("")) == ["afiles/and/anothers", "somefile"]
  
  
  @pytest.mark.xfail(
      sys.version_info < (3, 6),
      reason="py35 error, see https://github.com/intake/filesystem_spec/issues/148",
  )
  def test_ls(m):
      m.touch("/dir/afile")
      m.touch("/dir/dir1/bfile")
      m.touch("/dir/dir1/cfile")
  
      assert m.ls("/", False) == ["/dir/"]
      assert m.ls("/dir", False) == ["/dir/afile", "/dir/dir1/"]
      assert m.ls("/dir", True)[0]["type"] == "file"
      assert m.ls("/dir", True)[1]["type"] == "directory"
  
      assert len(m.ls("/dir/dir1")) == 2
  
new_contents: import pytest
  import sys
  
  
  def test_1(m):
      m.touch("/somefile")  # NB: is found with or without initial /
      m.touch("afiles/and/anothers")
      files = m.find("")
      if "somefile" in files:
          assert files == ["afiles/and/anothers", "somefile"]
      else:
          assert files == ["/somefile", "afiles/and/anothers"]
  
      files = list(m.get_mapper(""))
      if "somefile" in files:
          assert files == ["afiles/and/anothers", "somefile"]
      else:
          assert files == ["/somefile", "afiles/and/anothers"]
  
  
  @pytest.mark.xfail(
      sys.version_info < (3, 6),
      reason="py35 error, see https://github.com/intake/filesystem_spec/issues/148",
  )
  def test_ls(m):
      m.touch("/dir/afile")
      m.touch("/dir/dir1/bfile")
      m.touch("/dir/dir1/cfile")
  
      assert m.ls("/", False) == ["/dir/"]
      assert m.ls("/dir", False) == ["/dir/afile", "/dir/dir1/"]
      assert m.ls("/dir", True)[0]["type"] == "file"
      assert m.ls("/dir", True)[1]["type"] == "directory"
  
      assert len(m.ls("/dir/dir1")) == 2
  
subject: Fix test_memory.py