Skip multiprocessing test on java posix backend

Author: msimacek

graalpython/com.oracle.graal.python.test/src/tests/test_entropy_subprocess.py

@@ -48,6 +48,9 @@
 from tests.util import needs_capi
 
 
+POSIX_BACKEND_IS_JAVA = sys.implementation.name == "graalpy" and __graalpython__.posix_module_backend() == "java"
+
+
 @unittest.skipUnless(sys.implementation.name == "graalpy" and sys.platform.startswith("linux"), "Linux GraalPy-specific test")
 class EntropySubprocessTests(unittest.TestCase):
     HASH_SECRET_BYTES = 24
@@ -180,6 +183,7 @@ def test_multiprocessing_process_import_does_not_use_initrandom(self):
             "ok",
         )
 
+    @unittest.skipIf(POSIX_BACKEND_IS_JAVA, "multiprocessing doesn't work on Java POSIX backend")
     def test_multiprocessing_deliver_challenge_does_not_use_additional_initrandom(self):
         self.assert_initrandom_bytes_used(
             self.RANDOM_MODULE_BYTES,

graalpython/com.oracle.graal.python.test/src/tests/test_multiprocessing.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2026, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # The Universal Permissive License (UPL), Version 1.0
@@ -42,16 +42,16 @@
 import unittest
 
 
+POSIX_BACKEND_IS_JAVA = sys.implementation.name == 'graalpy' and __graalpython__.posix_module_backend() == 'java'
+
+
+@unittest.skipIf(POSIX_BACKEND_IS_JAVA, "multiprocessing doesn't work on emulated backend")
 class MultiprocessingTest(unittest.TestCase):
     @classmethod
     def tearDownClass(cls):
         import multiprocessing.resource_tracker
         multiprocessing.resource_tracker._resource_tracker._stop()
 
-    @unittest.skipIf(
-        sys.implementation.name == 'graalpy' and __graalpython__.posix_module_backend() == 'java',
-        reason="TODO multiprocessing.Array doesn't work on emulated backend",
-    )
     def test_array_read(self):
         # This used to be buggy due to wrong usage of memoryview offsets when two objects were allocated in the same block
         # Don't remove the unused value on the next line