From 7adee3bf138d3735f584a47d822676e82e7f5d00 Mon Sep 17 00:00:00 2001
From: Matthias Bernt <m.bernt@ufz.de>
Date: Wed, 12 Jan 2022 20:46:30 +0100
Subject: [PATCH] add test for the limited recursion possibilities

---
 lib/galaxy/util/xml_macros.py | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/lib/galaxy/util/xml_macros.py b/lib/galaxy/util/xml_macros.py
index 3b78da239c2b..2a895dfe514d 100644
--- a/lib/galaxy/util/xml_macros.py
+++ b/lib/galaxy/util/xml_macros.py
@@ -224,6 +224,33 @@ def _expand_yield_statements(macro_def, expand_el):
         <content_of_token2/>
         <more_content_of_token2/>
     </xml>
+    >>> # test recursion like replacements
+    >>> expand_el = XML('''
+    ...     <expand macro="test">
+    ...         <token name="token1">
+    ...             <T1><yield name="token2"/></T1>
+    ...         </token>
+    ...         <token name="token2">
+    ...             <T2><yield/></T2>
+    ...         </token>
+    ...         <T/>
+    ...     </expand>''')
+    >>> macro_def = XML('''
+    ... <xml name="test">
+    ...     <A><yield name="token1"/></A>
+    ... </xml>''')
+    >>> _expand_yield_statements(macro_def, expand_el)
+    >>> print(xml_to_string(macro_def, pretty=True))
+    <?xml version="1.0" ?>
+    <xml name="test">
+        <A>
+            <T1>
+                <T2>
+                    <T/>
+                </T2>
+            </T1>
+        </A>
+    </xml>
     """
     # replace named yields
     for token_el in expand_el.findall('./token'):