diff --git a/Lib/test/test_genericpath.py b/Lib/test/test_genericpath.py
index 391158b855624d..6c3abe602f557c 100644
--- a/Lib/test/test_genericpath.py
+++ b/Lib/test/test_genericpath.py
@@ -161,7 +161,6 @@ def test_exists(self):
self.assertIs(self.pathmodule.lexists(path=filename), True)
@unittest.skipUnless(hasattr(os, "pipe"), "requires os.pipe()")
- @unittest.skipIf(is_emscripten, "Fixed in next Emscripten release after 4.0.1")
def test_exists_fd(self):
r, w = os.pipe()
try:
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 23eb3b32b512f7..a3fed0f59db0bb 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -445,9 +445,6 @@ def test_invalid_operations(self):
self.assertRaises(exc, fp.seek, 1, self.SEEK_CUR)
self.assertRaises(exc, fp.seek, -1, self.SEEK_END)
- @unittest.skipIf(
- support.is_emscripten, "fstat() of a pipe fd is not supported"
- )
@unittest.skipUnless(hasattr(os, "pipe"), "requires os.pipe()")
def test_optional_abilities(self):
# Test for OSError when optional APIs are not supported
@@ -501,57 +498,65 @@ class UnseekableWriter(self.MockUnseekableIO):
(text_reader, "r"), (text_writer, "w"),
(self.BytesIO, "rws"), (self.StringIO, "rws"),
)
- for [test, abilities] in tests:
- with self.subTest(test), test() as obj:
- readable = "r" in abilities
- self.assertEqual(obj.readable(), readable)
- writable = "w" in abilities
- self.assertEqual(obj.writable(), writable)
-
- if isinstance(obj, self.TextIOBase):
- data = "3"
- elif isinstance(obj, (self.BufferedIOBase, self.RawIOBase)):
- data = b"3"
- else:
- self.fail("Unknown base class")
- if "f" in abilities:
- obj.fileno()
- else:
- self.assertRaises(OSError, obj.fileno)
+ def do_test(test, obj, abilities):
+ readable = "r" in abilities
+ self.assertEqual(obj.readable(), readable)
+ writable = "w" in abilities
+ self.assertEqual(obj.writable(), writable)
- if readable:
- obj.read(1)
- obj.read()
- else:
- self.assertRaises(OSError, obj.read, 1)
- self.assertRaises(OSError, obj.read)
+ if isinstance(obj, self.TextIOBase):
+ data = "3"
+ elif isinstance(obj, (self.BufferedIOBase, self.RawIOBase)):
+ data = b"3"
+ else:
+ self.fail("Unknown base class")
- if writable:
- obj.write(data)
- else:
- self.assertRaises(OSError, obj.write, data)
-
- if sys.platform.startswith("win") and test in (
- pipe_reader, pipe_writer):
- # Pipes seem to appear as seekable on Windows
- continue
- seekable = "s" in abilities
- self.assertEqual(obj.seekable(), seekable)
-
- if seekable:
- obj.tell()
- obj.seek(0)
- else:
- self.assertRaises(OSError, obj.tell)
- self.assertRaises(OSError, obj.seek, 0)
+ if "f" in abilities:
+ obj.fileno()
+ else:
+ self.assertRaises(OSError, obj.fileno)
+
+ if readable:
+ obj.read(1)
+ obj.read()
+ else:
+ self.assertRaises(OSError, obj.read, 1)
+ self.assertRaises(OSError, obj.read)
+
+ if writable:
+ obj.write(data)
+ else:
+ self.assertRaises(OSError, obj.write, data)
+
+ if sys.platform.startswith("win") and test in (
+ pipe_reader, pipe_writer):
+ # Pipes seem to appear as seekable on Windows
+ return
+ seekable = "s" in abilities
+ self.assertEqual(obj.seekable(), seekable)
+
+ if seekable:
+ obj.tell()
+ obj.seek(0)
+ else:
+ self.assertRaises(OSError, obj.tell)
+ self.assertRaises(OSError, obj.seek, 0)
+
+ if writable and seekable:
+ obj.truncate()
+ obj.truncate(0)
+ else:
+ self.assertRaises(OSError, obj.truncate)
+ self.assertRaises(OSError, obj.truncate, 0)
+
+ for [test, abilities] in tests:
+ with self.subTest(test):
+ if test == pipe_writer and not threading_helper.can_start_thread:
+ skipTest()
+ with test() as obj:
+ do_test(test, obj, abilities)
- if writable and seekable:
- obj.truncate()
- obj.truncate(0)
- else:
- self.assertRaises(OSError, obj.truncate)
- self.assertRaises(OSError, obj.truncate, 0)
def test_open_handles_NUL_chars(self):
fn_with_NUL = 'foo\0bar'
@@ -3928,7 +3933,6 @@ def test_issue35928(self):
self.assertEqual(res + f.readline(), 'foo\nbar\n')
@unittest.skipUnless(hasattr(os, "pipe"), "requires os.pipe()")
- @unittest.skipIf(support.is_emscripten, "Fixed in next Emscripten release after 4.0.1")
def test_read_non_blocking(self):
import os
r, w = os.pipe()
@@ -4243,9 +4247,6 @@ def test_removed_u_mode(self):
self.open(os_helper.TESTFN, mode)
self.assertIn('invalid mode', str(cm.exception))
- @unittest.skipIf(
- support.is_emscripten, "fstat() of a pipe fd is not supported"
- )
@unittest.skipUnless(hasattr(os, "pipe"), "requires os.pipe()")
def test_open_pipe_with_append(self):
# bpo-27805: Ignore ESPIPE from lseek() in open().
@@ -4414,15 +4415,11 @@ def test_pickling(self):
with self.assertRaisesRegex(TypeError, msg):
pickle.dumps(f, protocol)
- @unittest.skipIf(
- support.is_emscripten, "fstat() of a pipe fd is not supported"
- )
+ @unittest.skipIf(support.is_emscripten, "Emscripten corrupts memory when writing to nonblocking fd")
def test_nonblock_pipe_write_bigbuf(self):
self._test_nonblock_pipe_write(16*1024)
- @unittest.skipIf(
- support.is_emscripten, "fstat() of a pipe fd is not supported"
- )
+ @unittest.skipIf(support.is_emscripten, "Emscripten corrupts memory when writing to nonblocking fd")
def test_nonblock_pipe_write_smallbuf(self):
self._test_nonblock_pipe_write(1024)
diff --git a/Lib/test/test_ntpath.py b/Lib/test/test_ntpath.py
index da01c65a1c2954..c10387b58e3f9c 100644
--- a/Lib/test/test_ntpath.py
+++ b/Lib/test/test_ntpath.py
@@ -940,7 +940,6 @@ def check_error(paths, expected):
self.assertRaises(TypeError, ntpath.commonpath, ['C:\\Foo', b'Foo\\Baz'])
self.assertRaises(TypeError, ntpath.commonpath, ['Foo', b'C:\\Foo\\Baz'])
- @unittest.skipIf(is_emscripten, "Fixed in next Emscripten release after 4.0.1")
def test_sameopenfile(self):
with TemporaryFile() as tf1, TemporaryFile() as tf2:
# Make sure the same file is really the same
diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index 1497a98f9e6554..6d62d6119255a8 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -253,7 +253,6 @@ def test_invalid_socket(self):
self.assertRaises((ValueError, OSError),
signal.set_wakeup_fd, fd)
- @unittest.skipIf(support.is_emscripten, "Fixed in next Emscripten release after 4.0.1")
@unittest.skipUnless(hasattr(os, "pipe"), "requires os.pipe()")
def test_set_wakeup_fd_result(self):
r1, w1 = os.pipe()
@@ -272,7 +271,6 @@ def test_set_wakeup_fd_result(self):
self.assertEqual(signal.set_wakeup_fd(-1), w2)
self.assertEqual(signal.set_wakeup_fd(-1), -1)
- @unittest.skipIf(support.is_emscripten, "Fixed in next Emscripten release after 4.0.1")
@unittest.skipUnless(support.has_socket_support, "needs working sockets.")
def test_set_wakeup_fd_socket_result(self):
sock1 = socket.socket()
@@ -293,7 +291,6 @@ def test_set_wakeup_fd_socket_result(self):
# On Windows, files are always blocking and Windows does not provide a
# function to test if a socket is in non-blocking mode.
@unittest.skipIf(sys.platform == "win32", "tests specific to POSIX")
- @unittest.skipIf(support.is_emscripten, "Fixed in next Emscripten release after 4.0.1")
@unittest.skipUnless(hasattr(os, "pipe"), "requires os.pipe()")
def test_set_wakeup_fd_blocking(self):
rfd, wfd = os.pipe()
diff --git a/Tools/wasm/README.md b/Tools/wasm/README.md
index 2e0fa2fb533d67..62aa87aa7b18cd 100644
--- a/Tools/wasm/README.md
+++ b/Tools/wasm/README.md
@@ -24,8 +24,9 @@ https://github.com/psf/webassembly for more information.
To cross compile to the ``wasm32-emscripten`` platform you need
[the Emscripten compiler toolchain](https://emscripten.org/),
a Python interpreter, and an installation of Node version 18 or newer.
-Emscripten version 3.1.73 or newer is recommended. All commands below are
-relative to a checkout of the Python repository.
+Emscripten version 4.0.2 is recommended; newer versions may also work, but all
+official testing is performed with that version. All commands below are relative
+to a checkout of the Python repository.
#### Install [the Emscripten compiler toolchain](https://emscripten.org/docs/getting_started/downloads.html)
@@ -266,7 +267,7 @@ if os.name == "posix":
posix.uname_result(
sysname='Emscripten',
nodename='emscripten',
- release='3.1.19',
+ release='4.0.2',
version='#1',
machine='wasm32'
)
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