M6.5: enroll n8n (recipe #6, workflow automation) — tests authored (single-service, .n8n volume)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/n8n/test_backup.py

@@ -0,0 +1,29 @@
+"""n8n — backup/restore stage (D2): write a marker into the backed-up /home/node/.n8n path, backup,
+mutate, restore, assert the restored state matches the pre-mutation state.
+
+The n8n `app` service is labelled `backupbot.backup=true` with `backupbot.backup.path=/home/node/.n8n`,
+so a marker file there is backed up; checked via `exec_in_app`."""
+import os
+import sys
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "runner"))
+from harness import lifecycle  # noqa: E402
+
+MARKER = "/home/node/.n8n/ci-marker.txt"
+
+
+def test_backup_mutate_restore(deployed, meta):
+    domain = deployed
+
+    lifecycle.exec_in_app(domain, ["sh", "-c", f"echo original > {MARKER}"])
+    assert lifecycle.exec_in_app(domain, ["cat", MARKER]).strip() == "original"
+    lifecycle.backup_app(domain)
+
+    lifecycle.exec_in_app(domain, ["sh", "-c", f"echo mutated > {MARKER}"])
+    assert lifecycle.exec_in_app(domain, ["cat", MARKER]).strip() == "mutated"
+
+    lifecycle.restore_app(domain)
+    lifecycle.wait_healthy(domain, ok_codes=tuple(meta["HEALTH_OK"]), path=meta["HEALTH_PATH"],
+                           deploy_timeout=meta["DEPLOY_TIMEOUT"], http_timeout=meta["HTTP_TIMEOUT"])
+    assert lifecycle.exec_in_app(domain, ["cat", MARKER]).strip() == "original", \
+        "restore did not return the pre-mutation state"