bpo-28624: Add test for subprocess to check that cmd arg supports PathLike

Doc/library/subprocess.rst

@@ -466,9 +466,13 @@ functions.
  The *pass_fds* parameter was added.
 
  If *cwd* is not ``None``, the function changes the working directory to
- *cwd* before executing the child. In particular, the function looks for
- *executable* (or for the first item in *args*) relative to *cwd* if the
- executable path is a relative path.
+ *cwd* before executing the child. *cwd* can be a :class:`str` and
+ :term:`path-like <path-like object>` object. In particular, the function
+ looks for *executable* (or for the first item in *args*) relative to *cwd*
+ if the executable path is a relative path.
+
+ .. versionchanged:: 3.6
+ *cwd* parameter accepts a :term:`path-like object`.
 
  If *restore_signals* is true (the default) all signals that Python has set to
  SIG_IGN are restored to SIG_DFL in the child process before the exec.

Lib/test/test_subprocess.py

@@ -347,6 +347,16 @@ def test_cwd(self):
  temp_dir = self._normalize_cwd(temp_dir)
  self._assert_cwd(temp_dir, sys.executable, cwd=temp_dir)
 
+ def test_cwd_with_pathlike(self):
+ temp_dir = tempfile.gettempdir()
+ temp_dir = self._normalize_cwd(temp_dir)
+
+ class _PathLikeObj:
+ def __fspath__(self):
+ return temp_dir
+
+ self._assert_cwd(temp_dir, sys.executable, cwd=_PathLikeObj())
+
  @unittest.skipIf(mswindows, "pending resolution of issue #15533")
  def test_cwd_with_relative_arg(self):
  # Check that Popen looks for args[0] relative to cwd if args[0]

Misc/ACKS

@@ -269,6 +269,7 @@ Albert Chin-A-Young
 Adal Chiriliuc
 Matt Chisholm
 Lita Cho
+Sayan Chowdhury
 Anders Chrigström
 Tom Christiansen
 Renee Chu

Misc/NEWS

@@ -249,6 +249,9 @@ Extension Modules
 Library
 -------
 
+- bpo-28624: Add a test that checks that cwd parameter of Popen() accepts
+ PathLike objects. Patch by Sayan Chowdhury.
+
 - bpo-28518: Start a transaction implicitly before a DML statement.
  Patch by Aviv Palivoda.