tests/extmod/ure_namedclass: Add tests for named classes in class sets.

Signed-off-by: Damien George <damien@micropython.org>

tests/extmod/ure_namedclass.py

@@ -15,7 +15,7 @@ def print_groups(match):
     try:
         i = 0
         while True:
-            print(m.group(i))
+            print(match.group(i))
             i += 1
     except IndexError:
         pass
@@ -32,3 +32,8 @@ print_groups(m)
 
 m = re.match(r"(([0-9]*)([a-z]*)\d*)", "1234hello567")
 print_groups(m)
+
+# named class within a class set
+print_groups(re.match("([^\s]+)\s*([^\s]+)", "1 23"))
+print_groups(re.match("([\s\d]+)([\W]+)", "1  2-+="))
+print_groups(re.match("([\W]+)([^\W]+)([^\S]+)([^\D]+)", " a_1 23"))