cdnxdomain test is failing on some platforms

Ensure the modification time is newer (second granuality) when the
zone file is rewritten as named uses the file modification time to
determine if it needs to reload a file.

diff --git a/bin/tests/system/cdnxdomain/tests_cdnxdomain.py b/bin/tests/system/cdnxdomain/tests_cdnxdomain.py
index 4f211f0be51969b6e1645ab701eb4d3bd8b26467..6448dd7b515c9596533346f5e9307f8ddcf291bc 100644 (file)
--- a/bin/tests/system/cdnxdomain/tests_cdnxdomain.py
+++ b/bin/tests/system/cdnxdomain/tests_cdnxdomain.py
@@ -76,7 +76,20 @@ ns2 A 10.53.0.2
 def _serve(ns2, system_test_dir, variant):
     """Make ns2 serve the 'full' or 'empty' (a.example-less) signed zone."""
     src = system_test_dir / "ns2" / f"example-{variant}.db.signed"
-    shutil.copyfile(src, system_test_dir / "ns2" / "example.db.signed")
+    dst = system_test_dir / "ns2" / "example.db.signed"
+    # Ensure that the modification time of 'dst' increases on
+    # file systems with seconds granuality.
+    st_ok = False
+    try:
+        st = os.stat(dst)
+        st_ok = True
+    except FileNotFoundError:
+        pass
+    shutil.copyfile(src, dst)
+    if st_ok:
+        st2 = os.stat(dst)
+        if int(st2.st_mtime) <= int(st.st_mtime):
+            os.utime(dst, (st2.st_atime, st.st_mtime + 1))
     ns2.reload()