old_contents: from nose.tools import istest, assert_equal
  
  from mammoth import zips
  
  
  @istest
  def split_path_splits_zip_paths_on_last_forward_slash():
      assert_equal(("a", "b"), zips.split_path("a/b"))
      assert_equal(("a/b", "c"), zips.split_path("a/b/c"))
      assert_equal(("/a/b", "c"), zips.split_path("/a/b/c"))
  
  
  @istest
  def when_path_has_no_forward_slashes_then_split_path_returns_empty_dirname():
      assert_equal(("", "name"), zips.split_path("name"))
  
  
  @istest
  def join_path_joins_arguments_with_forward_slashes():
      assert_equal("a/b", zips.join_path("a", "b"))
      assert_equal("a/b/c", zips.join_path("a/b", "c"))
      assert_equal("/a/b/c", zips.join_path("/a/b", "c"))
  
  
  @istest
  def empty_parts_are_ignored_when_joining_paths():
      assert_equal("a", zips.join_path("", "a"))
      assert_equal("b", zips.join_path("", "b"))
      assert_equal("a/b", zips.join_path("a", "", "b"))
      
  
new_contents: from nose.tools import istest, assert_equal
  
  from mammoth import zips
  
  
  @istest
  def split_path_splits_zip_paths_on_last_forward_slash():
      assert_equal(("a", "b"), zips.split_path("a/b"))
      assert_equal(("a/b", "c"), zips.split_path("a/b/c"))
      assert_equal(("/a/b", "c"), zips.split_path("/a/b/c"))
  
  
  @istest
  def when_path_has_no_forward_slashes_then_split_path_returns_empty_dirname():
      assert_equal(("", "name"), zips.split_path("name"))
  
  
  @istest
  def join_path_joins_arguments_with_forward_slashes():
      assert_equal("a/b", zips.join_path("a", "b"))
      assert_equal("a/b/c", zips.join_path("a/b", "c"))
      assert_equal("/a/b/c", zips.join_path("/a/b", "c"))
  
  
  @istest
  def empty_parts_are_ignored_when_joining_paths():
      assert_equal("a", zips.join_path("a", ""))
      assert_equal("b", zips.join_path("", "b"))
      assert_equal("a/b", zips.join_path("a", "", "b"))
      
  
subject: Fix test case