From 188a80ddd68ad2101bd8eb39eac46d22ed251b56 Mon Sep 17 00:00:00 2001
From: deflis <deflis@gmail.com>
Date: Mon, 2 Nov 2026 01:21:22 +0900
Subject: [PATCH] =?UTF-8?q?RankingBuilder=E3=81=AE=E7=A9=BA=E3=83=A9?=
 =?UTF-8?q?=E3=83=B3=E3=82=AD=E3=83=B3=E3=82=B0=E6=99=82=E3=81=AE=E8=A9=B3?=
 =?UTF-8?q?=E7=B4=B0=E5=8F=96=E5=BE=97=E3=82=92=E6=8A=91=E6=AD=A2?=
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---
 src/ranking.ts       |  4 ++++
 test/ranking.test.ts | 25 +++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/src/ranking.ts b/src/ranking.ts
index bdcbaea..46fe2d5 100644
--- a/src/ranking.ts
+++ b/src/ranking.ts
@@ -181,6 +181,10 @@ export default class RankingBuilder {
     options?: ExecuteOptions
   ): Promise<RankingResult<SearchResultFields<TFields>>[]> {
     const ranking = await this.execute(options);
+    if (ranking.length === 0) {
+      return [];
+    }
+
     const fields$ = Array.isArray(fields)
       ? fields.length == 0
         ? []
diff --git a/test/ranking.test.ts b/test/ranking.test.ts
index 7ea0f30..d3a46a4 100644
--- a/test/ranking.test.ts
+++ b/test/ranking.test.ts
@@ -314,6 +314,31 @@ describe("RankingBuilder", () => {
   });
 
   describe("executeWithFields", async () => {
+    test.each([{ fields: [] }, { fields: [Fields.title] }])(
+      "ランキングが空なら詳細取得を行わない (fields = $fields)",
+      async ({ fields }) => {
+        const mockRankingRequest = vi.fn();
+        const mockNovelRequest = vi.fn();
+
+        server.use(
+          http.get("https://api.syosetu.com/rank/rankget/", ({ request }) => {
+            mockRankingRequest();
+            return responseGzipOrJson([], new URL(request.url));
+          }),
+          http.get("https://api.syosetu.com/novelapi/api/", ({ request }) => {
+            mockNovelRequest();
+            return responseGzipOrJson([{ allcount: 0 }], new URL(request.url));
+          })
+        );
+
+        const result = await ranking().executeWithFields(fields);
+
+        expect(result).toEqual([]);
+        expect(mockRankingRequest).toHaveBeenCalledTimes(1);
+        expect(mockNovelRequest).not.toHaveBeenCalled();
+      }
+    );
+
     test("fields = default", async () => {
       const mockFn = vi.fn();
       const mockFn2 = vi.fn();