From b08713f09f0e1b041f8f3e8493d06fdb99cbf47d Mon Sep 17 00:00:00 2001
From: Seth R Johnson <johnsonsr@ornl.gov>
Date: Sat, 12 Feb 2022 19:39:35 -0500
Subject: [PATCH] Add test of null shared pointers emitted from C++

This tests nulls emitted as pointers and values of shared pointers,
created from null, from references, and from default constructors.
---
 Examples/test-suite/li_boost_shared_ptr.i           |  4 ++++
 .../test-suite/python/li_boost_shared_ptr_runme.py  | 13 +++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/Examples/test-suite/li_boost_shared_ptr.i b/Examples/test-suite/li_boost_shared_ptr.i
index b64197be1..001eacb78 100644
--- a/Examples/test-suite/li_boost_shared_ptr.i
+++ b/Examples/test-suite/li_boost_shared_ptr.i
@@ -242,6 +242,10 @@ std::string nullsmartpointerpointertest(SwigBoost::shared_ptr<Klass>* k) {
   else
     return "also not null";
 }
+
+SwigBoost::shared_ptr<Klass>* sp_pointer_null() { return NULL; }
+SwigBoost::shared_ptr<Klass>* null_sp_pointer() { static SwigBoost::shared_ptr<Klass> static_sp; return &static_sp; }
+SwigBoost::shared_ptr<Klass> sp_value_null() { return SwigBoost::shared_ptr<Klass>(); }
 // $owner
 Klass *pointerownertest() {
   return new Klass("pointerownertest");
diff --git a/Examples/test-suite/python/li_boost_shared_ptr_runme.py b/Examples/test-suite/python/li_boost_shared_ptr_runme.py
index 2e241d590..bde79fd61 100644
--- a/Examples/test-suite/python/li_boost_shared_ptr_runme.py
+++ b/Examples/test-suite/python/li_boost_shared_ptr_runme.py
@@ -168,6 +168,19 @@ class li_boost_shared_ptr_runme:
         except ValueError:
             pass
 
+        # test null pointers emitted from C++
+        k = li_boost_shared_ptr.sp_pointer_null()
+        if (li_boost_shared_ptr.smartpointertest(k) != None):
+            raise RuntimeError("return was not null")
+
+        k = li_boost_shared_ptr.null_sp_pointer()
+        if (li_boost_shared_ptr.smartpointertest(k) != None):
+            raise RuntimeError("return was not null")
+
+        k = li_boost_shared_ptr.sp_value_null()
+        if (li_boost_shared_ptr.smartpointertest(k) != None):
+            raise RuntimeError("return was not null")
+
         # $owner
         k = li_boost_shared_ptr.pointerownertest()
         val = k.getValue()