Remove pathlib compatibility layer

pathlib comes with Python 3.4 stdlib, so no need to add a compatibility
layer.

The path_splitter function has been re-written in terms of pathlib
since that is now guaranteed to exist. Much simpler.

2 files changed, 17 insertions, 15 deletions

diff --git a/tests/test_natsorted.py b/tests/test_natsorted.py
index d8ef8c0..f0940aa 100644
--- a/tests/test_natsorted.py
+++ b/tests/test_natsorted.py
@@ -134,12 +134,14 @@ def test_natsorted_returns_list_in_reversed_order_with_reverse_option(float_list
 def test_natsorted_handles_filesystem_paths():
     given = [
         "/p/Folder (10)/file.tar.gz",
-        "/p/Folder/file.tar.gz",
         "/p/Folder (1)/file (1).tar.gz",
+        "/p/Folder/file.x1.9.tar.gz",
         "/p/Folder (1)/file.tar.gz",
+        "/p/Folder/file.x1.10.tar.gz",
     ]
     expected_correct = [
-        "/p/Folder/file.tar.gz",
+        "/p/Folder/file.x1.10.tar.gz",
+        "/p/Folder/file.x1.9.tar.gz",
         "/p/Folder (1)/file.tar.gz",
         "/p/Folder (1)/file (1).tar.gz",
         "/p/Folder (10)/file.tar.gz",
@@ -148,12 +150,13 @@ def test_natsorted_handles_filesystem_paths():
         "/p/Folder (1)/file (1).tar.gz",
         "/p/Folder (1)/file.tar.gz",
         "/p/Folder (10)/file.tar.gz",
-        "/p/Folder/file.tar.gz",
+        "/p/Folder/file.x1.10.tar.gz",
+        "/p/Folder/file.x1.9.tar.gz",
     ]
     # Is incorrect by default.
-    assert natsorted(given) == expected_incorrect
+    assert natsorted(given, alg=ns.FLOAT) == expected_incorrect
     # Need ns.PATH to make it correct.
-    assert natsorted(given, alg=ns.PATH) == expected_correct
+    assert natsorted(given, alg=ns.FLOAT | ns.PATH) == expected_correct
 
 
 def test_natsorted_handles_numbers_and_filesystem_paths_simultaneously():
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 964876a..76d8e23 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 """These test the utils.py functions."""
 
+import os
 import pathlib
 import string
 from itertools import chain
@@ -128,10 +129,11 @@ def test_sep_inserter_inserts_separator_between_two_numbers(x):
 
 
 def test_path_splitter_splits_path_string_by_separator_example():
-    z = "/this/is/a/path"
-    assert tuple(utils.path_splitter(z)) == tuple(pathlib.Path(z).parts)
-    z = pathlib.Path("/this/is/a/path")
-    assert tuple(utils.path_splitter(z)) == tuple(pathlib.Path(z).parts)
+    given = "/this/is/a/path"
+    expected = (os.sep, "this", "is", "a", "path")
+    assert tuple(utils.path_splitter(given)) == tuple(expected)
+    given = pathlib.Path(given)
+    assert tuple(utils.path_splitter(given)) == tuple(expected)
 
 
 @given(lists(sampled_from(string.ascii_letters), min_size=2).filter(all))
@@ -141,12 +143,9 @@ def test_path_splitter_splits_path_string_by_separator(x):
 
 
 def test_path_splitter_splits_path_string_by_separator_and_removes_extension_example():
-    z = "/this/is/a/path/file.exe"
-    y = tuple(pathlib.Path(z).parts)
-    assert tuple(utils.path_splitter(z)) == y[:-1] + (
-        pathlib.Path(z).stem,
-        pathlib.Path(z).suffix,
-    )
+    given = "/this/is/a/path/file.x1.10.tar.gz"
+    expected = (os.sep, "this", "is", "a", "path", "file.x1.10", ".tar", ".gz")
+    assert tuple(utils.path_splitter(given)) == tuple(expected)
 
 
 @given(lists(sampled_from(string.ascii_letters), min_size=3).filter(all))