From 17c76b66bb0da582d76d5f4e1072c25455cb3a9c Mon Sep 17 00:00:00 2001
From: James Turner <james@flightgear.org>
Date: Tue, 12 Sep 2023 22:38:48 +0100
Subject: [PATCH] Nasal: add nil tests for ??

---
 test_suite/unit_tests/Scripting/testNasalSys.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/test_suite/unit_tests/Scripting/testNasalSys.cxx b/test_suite/unit_tests/Scripting/testNasalSys.cxx
index 6aaf18080..ea68a59b5 100644
--- a/test_suite/unit_tests/Scripting/testNasalSys.cxx
+++ b/test_suite/unit_tests/Scripting/testNasalSys.cxx
@@ -328,6 +328,9 @@ void NasalSysTests::testNullishChain()
         unitTest.assert_equal(t ?? 99, 99);
         unitTest.assert_equal(s ?? 'default', 'abc');
         unitTest.assert_equal(t ?? 'default', 'default');
+
+        # check 0 is used, only nil should fail
+        unitTest.assert_equal(0 ?? 'default', 0);
     )");
 
     CPPUNIT_ASSERT(ok);