비밀번호 재설정 중복 완료 요청 문제 수정

backend/internal/service/sms_service_test.go

@@ -0,0 +1,26 @@
+package service
+
+import "testing"
+
+func TestBuildNaverSmsRequest_UsesSMSForShortContent(t *testing.T) {
+	req := buildNaverSmsRequest("0262857755", "821012345678", "123456")
+
+	if req.Type != "SMS" {
+		t.Fatalf("expected SMS, got %s", req.Type)
+	}
+	if req.Subject != "" {
+		t.Fatalf("expected empty subject for SMS, got %q", req.Subject)
+	}
+}
+
+func TestBuildNaverSmsRequest_UsesLMSForLongContent(t *testing.T) {
+	content := "[Baron 로그인] 비밀번호 재설정 링크: http://sso-test.hmac.kr/api/v1/auth/password/reset/v/1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"
+	req := buildNaverSmsRequest("0262857755", "821012345678", content)
+
+	if req.Type != "LMS" {
+		t.Fatalf("expected LMS, got %s", req.Type)
+	}
+	if req.Subject == "" {
+		t.Fatal("expected LMS subject to be set")
+	}
+}