FIX-modin-project#2559: Ignore files from /proc/ when detecting file …

…leaks

Signed-off-by: Vasilij Litvinov <vasilij.n.litvinov@intel.com>

modin/pandas/test/utils.py

@@ -1047,7 +1047,10 @@ def check(*a, **kw):
                 try:
                     fstart.remove(item)
                 except ValueError:
-                    leaks.append(item)
+                    # ignore files in /proc/, as they have nothing to do with
+                    # modin reading any data (and this is what we care about)
+                    if not item[0].startswith("/proc/"):
+                        leaks.append(item)
             assert (
                 not leaks
             ), f"Unexpected open handles left for: {', '.join(item[0] for item in leaks)}"