From ad05eec952ed7a04ef6aaf3336ce8aaaaff21c43 Mon Sep 17 00:00:00 2001
From: proddy <paul@derbyshire.nl>
Date: Mon, 4 May 2026 08:15:27 +0200
Subject: [PATCH] fix standalone and tests

---
 lib_standalone/WString.h          | 2 +-
 test/test_api/test_shuntingYard.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib_standalone/WString.h b/lib_standalone/WString.h
index ee53d7456..48e08819b 100644
--- a/lib_standalone/WString.h
+++ b/lib_standalone/WString.h
@@ -33,7 +33,7 @@ class String {
         return lhs;
     }
 
-    bool isEmpty() {
+    bool isEmpty() const {
         return _str.empty();
     }
 
diff --git a/test/test_api/test_shuntingYard.h b/test/test_api/test_shuntingYard.h
index 5210672c1..eabf68974 100644
--- a/test/test_api/test_shuntingYard.h
+++ b/test/test_api/test_shuntingYard.h
@@ -92,7 +92,7 @@ void shuntingYard_test21() {
 }
 
 void shuntingYard_test22() {
-    run_shuntingYard_test("", "boiler/storagetemp2 == ''");
+    run_shuntingYard_test("0", "boiler/storagetemp2 == ''");
 }
 
 void shuntingYard_test23() {