[3.6] bpo-32964: Reuse a testing implementation of the path protocol in tests. (GH-5930). (GH-5958)

(cherry picked from commit b21d155f57d284aecf9092a9bd24258293965c2f)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

1 files changed, 14 insertions, 11 deletions

diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 6c30a44..3f3b390 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -36,6 +36,7 @@ from collections import deque, UserList
 from itertools import cycle, count
 from test import support
 from test.support.script_helper import assert_python_ok, run_python_until_end
+from test.support import FakePath
 
 import codecs
 import io  # C implementation of io
@@ -880,13 +881,6 @@ class IOTest(unittest.TestCase):
                 self.assertEqual(bytes(buffer), b"12345")
 
     def test_fspath_support(self):
-        class PathLike:
-            def __init__(self, path):
-                self.path = path
-
-            def __fspath__(self):
-                return self.path
-
         def check_path_succeeds(path):
             with self.open(path, "w") as f:
                 f.write("egg\n")
@@ -894,16 +888,25 @@ class IOTest(unittest.TestCase):
             with self.open(path, "r") as f:
                 self.assertEqual(f.read(), "egg\n")
 
-        check_path_succeeds(PathLike(support.TESTFN))
-        check_path_succeeds(PathLike(support.TESTFN.encode('utf-8')))
+        check_path_succeeds(FakePath(support.TESTFN))
+        check_path_succeeds(FakePath(support.TESTFN.encode('utf-8')))
+
+        with self.open(support.TESTFN, "w") as f:
+            bad_path = FakePath(f.fileno())
+            with self.assertRaises(TypeError):
+                self.open(bad_path, 'w')
 
-        bad_path = PathLike(TypeError)
+        bad_path = FakePath(None)
         with self.assertRaises(TypeError):
             self.open(bad_path, 'w')
 
+        bad_path = FakePath(FloatingPointError)
+        with self.assertRaises(FloatingPointError):
+            self.open(bad_path, 'w')
+
         # ensure that refcounting is correct with some error conditions
         with self.assertRaisesRegex(ValueError, 'read/write/append mode'):
-            self.open(PathLike(support.TESTFN), 'rwxa')
+            self.open(FakePath(support.TESTFN), 'rwxa')
 
     def test_RawIOBase_readall(self):
         # Exercise the default unlimited RawIOBase.read() and readall()