gh-149879: Fix test_resource on Cygwin (#149903)

vstinner · web-flow · commit e56ae817e5f3 · 2026-05-15T23:09:36.000Z
Setting RLIMIT_FSIZE or RLIMIT_CPU fails with EINVAL on Cygwin.
diff --git a/Lib/test/test_resource.py b/Lib/test/test_resource.py
@@ -45,8 +45,8 @@ def test_fsize_ismax(self):
         resource.setrlimit(resource.RLIMIT_FSIZE, (max, max))
         resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
 
-    @unittest.skipIf(sys.platform == "vxworks",
-                     "setting RLIMIT_FSIZE is not supported on VxWorks")
+    @unittest.skipIf(sys.platform in ("vxworks", "cygwin"),
+                     f"setting RLIMIT_FSIZE is not supported on {sys.platform}")
     @unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
     def test_fsize_enforced(self):
         self.addCleanup(os_helper.unlink, os_helper.TESTFN)
@@ -84,8 +84,8 @@ def test_fsize_too_big(self):
         except (OverflowError, ValueError):
             pass
 
-    @unittest.skipIf(sys.platform == "vxworks",
-                     "setting RLIMIT_FSIZE is not supported on VxWorks")
+    @unittest.skipIf(sys.platform in ("vxworks", "cygwin"),
+                     f"setting RLIMIT_FSIZE is not supported on {sys.platform}")
     @unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
     def test_fsize_not_too_big(self):
         (cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
@@ -163,8 +163,8 @@ def test_getrusage(self):
             pass
 
     # Issue 6083: Reference counting bug
-    @unittest.skipIf(sys.platform == "vxworks",
-                     "setting RLIMIT_CPU is not supported on VxWorks")
+    @unittest.skipIf(sys.platform in ("vxworks", "cygwin"),
+                     f"setting RLIMIT_CPU is not supported on {sys.platform}")
     @unittest.skipUnless(hasattr(resource, 'RLIMIT_CPU'), 'requires resource.RLIMIT_CPU')
     def test_setrusage_refcount(self):
         limits = resource.getrlimit(resource.RLIMIT_CPU)
