BAIS payments 멀티모듈 최소 구현 (BAIS-MULTI-1783814676)

services/payments/src/test/java/com/klaro/bais/payments/PaymentReferenceServiceTest.java

@@ -0,0 +1,29 @@
+package com.klaro.bais.payments;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class PaymentReferenceServiceTest {
+    private final PaymentReferenceService service = new PaymentReferenceService();
+
+    @Test
+    void testNormalizeNull() {
+        assertEquals("", service.normalize(null));
+    }
+
+    @Test
+    void testNormalizeEmptyString() {
+        assertEquals("", service.normalize(""));
+    }
+
+    @Test
+    void testNormalizeWhitespace() {
+        assertEquals("", service.normalize("   " ));
+    }
+
+    @Test
+    void testNormalizeValidString() {
+        assertEquals("valid", service.normalize(" valid "));
+    }
+}