From 10434c66e2d50791f2db79a64fdbf7d6ea62a5e1 Mon Sep 17 00:00:00 2001
From: kiki-kanri <a470666@gmail.com>
Date: Sun, 15 Dec 2024 14:21:15 +0800
Subject: [PATCH] fix: resolve issue in decimal128 schema builder's
 `setToStringGetter` not handling undefined input

---
 src/schema-builders/decimal128.ts        | 4 ++--
 tests/schema-builders/decimal128.test.ts | 5 +++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/schema-builders/decimal128.ts b/src/schema-builders/decimal128.ts
index ad47d10..b4c5eee 100644
--- a/src/schema-builders/decimal128.ts
+++ b/src/schema-builders/decimal128.ts
@@ -19,7 +19,7 @@ interface BaseProps {
 }
 
 interface ToStringGetterSchema {
-    get: (value: Types.Decimal128) => string;
+    get: (value?: Types.Decimal128) => string | undefined;
 }
 
 interface ToStringSetterSchema {
@@ -87,7 +87,7 @@ export function decimal128SchemaBuilder() {
                 }
 
                 if (key === 'setToStringGetter') {
-                    schema.get = (value: Types.Decimal128) => value.toString();
+                    schema.get = (value?: Types.Decimal128) => value?.toString();
                     return receiver;
                 }
 
diff --git a/tests/schema-builders/decimal128.test.ts b/tests/schema-builders/decimal128.test.ts
index f840a2f..dfa792a 100644
--- a/tests/schema-builders/decimal128.test.ts
+++ b/tests/schema-builders/decimal128.test.ts
@@ -16,6 +16,11 @@ describe('decimal128SchemaBuilder', () => {
         expect(schema.get(new Types.Decimal128('114514.1919810'))).toEqual('114514.1919810');
     });
 
+    it('should return the undefined representation of Decimal128 when using setToStringGetter', () => {
+        const schema = decimal128SchemaBuilder().setToStringGetter.nonRequired;
+        expect(schema.get()).toBeUndefined();
+    });
+
     it('should set the value correctly with rounding and fixed decimal places', () => {
         const schema1 = decimal128SchemaBuilder().setRoundAndToFixedSetter().nonRequired;
         expect(schema1.set('114514.1919810')).toEqual('114514.19');