gh-127146: Skip Emscripten tests with pending fixes (#128549)

Marks some additional tests as skipped on Emscripten. Many of these skips can be
reverted when the next Emscripten release is available.

Author: hoodmane

Lib/test/test_io.py

@@ -3933,6 +3933,7 @@ 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, "Would be fixed by emscripten-core/emscripten#23306")
     def test_read_non_blocking(self):
         import os
         r, w = os.pipe()

Lib/test/test_os.py

@@ -4979,6 +4979,7 @@ def test_unpickable(self):
         self.assertRaises(TypeError, pickle.dumps, scandir_iter, filename)
         scandir_iter.close()
 
+    @unittest.skipIf(support.is_emscripten, "Fixed by emscripten-core/emscripten#23139, remove when next Emscripten release comes out")
     def check_entry(self, entry, name, is_dir, is_file, is_symlink):
         self.assertIsInstance(entry, os.DirEntry)
         self.assertEqual(entry.name, name)

Lib/test/test_shutil.py

@@ -1587,6 +1587,7 @@ def test_copyfile_same_file(self):
     # the path as a directory, but on AIX the trailing slash has no effect
     # and is considered as a file.
     @unittest.skipIf(AIX, 'Not valid on AIX, see gh-92670')
+    @unittest.skipIf(support.is_emscripten, 'Fixed by emscripten-core/emscripten#23218, remove when next Emscripten release comes out')
     def test_copyfile_nonexistent_dir(self):
         # Issue 43219
         src_dir = self.mkdtemp()

Lib/test/test_tarfile.py

@@ -3800,6 +3800,7 @@ def test_absolute_hardlink(self):
                 "'parent' is a link to an absolute path")
 
     @symlink_test
+    @unittest.skipIf(support.is_emscripten, "Fixed by emscripten-core/emscripten#23136, remove when next Emscripten release comes out")
     def test_sly_relative0(self):
         # Inspired by 'relative0' in jwilk/traversal-archives
         with ArchiveMaker() as arc:

Lib/test/test_zipfile/test_core.py

@@ -22,7 +22,8 @@
 from test.support import script_helper
 from test.support import (
     findfile, requires_zlib, requires_bz2, requires_lzma,
-    captured_stdout, captured_stderr, requires_subprocess
+    captured_stdout, captured_stderr, requires_subprocess,
+    is_emscripten
 )
 from test.support.os_helper import (
     TESTFN, unlink, rmtree, temp_dir, temp_cwd, fd_count, FakePath
@@ -622,6 +623,7 @@ def test_write_to_readonly(self):
             with self.assertRaises(ValueError):
                 zipfp.open(TESTFN, mode='w')
 
+    @unittest.skipIf(is_emscripten, "Fixed by emscripten-core/emscripten#23310")
     def test_add_file_before_1980(self):
         # Set atime and mtime to 1970-01-01
         os.utime(TESTFN, (0, 0))

Lib/test/test_zipimport.py

@@ -1038,6 +1038,7 @@ def testEmptyFile(self):
         self.assertZipFailure(TESTMOD)
 
     @unittest.skipIf(support.is_wasi, "mode 000 not supported.")
+    @unittest.skipIf(support.is_emscripten, "Fixed by emscripten-core/emscripten#23137, remove when next Emscripten release comes out")
     def testFileUnreadable(self):
         os_helper.unlink(TESTMOD)
         fd = os.open(TESTMOD, os.O_CREAT, 000)