test(calculate-version): 整併單元測試至 app/test 並移除無法被執行的重複測試目錄

app/package.json 的 npm test（node --test，cwd 為 app/）只會探索 app/test/，
repo 根目錄另一份 test/ 中的 main 整合測試（index.test.js）因此從未被執行。
將 config/index/releases/version 收斂至 app/test/（修正 require 路徑），
保留 output 測試，移除重複且無法執行的 repo 根 test/。現 app/test/ 共 34 筆測試皆可執行。

app/test/releases.test.js

@@ -1,70 +1,105 @@
 'use strict';
 
-const { test, afterEach } = require('node:test');
+const test = require('node:test');
 const assert = require('node:assert/strict');
-const { RELEASES_PER_PAGE, fetchReleases } = require('../releases');
 
-const realFetch = globalThis.fetch;
+const { fetchReleases } = require('../releases');
 
-afterEach(() => {
-    globalThis.fetch = realFetch;
-});
-
-function mockResponse(items) {
-    return { ok: true, text: async () => JSON.stringify(items) };
+// 以可控的假回應替換全域 fetch，並於結束後還原
+function withFetch(handler, run) {
+    const original = globalThis.fetch;
+    globalThis.fetch = handler;
+    return Promise.resolve()
+        .then(run)
+        .finally(() => {
+            globalThis.fetch = original;
+        });
 }
 
-test('fetchReleases 逐頁讀取直到不足一頁', async () => {
-    const fullPage = Array.from({ length: RELEASES_PER_PAGE }, (_, i) => ({ id: i }));
-    const lastPage = [{ id: 100 }, { id: 101 }];
-    const requested = [];
-    globalThis.fetch = async (url) => {
-        const page = Number(new URL(url).searchParams.get('page'));
-        requested.push(page);
-        return mockResponse(page === 1 ? fullPage : lastPage);
-    };
-
-    const releases = await fetchReleases('https://gitea.example.com/api/v1/repos/o/r/releases');
-
-    assert.equal(releases.length, RELEASES_PER_PAGE + lastPage.length);
-    assert.deepEqual(requested, [1, 2]);
+// 建立模擬 Response 物件
+const jsonResponse = (body, ok = true) => ({
+    ok,
+    text: async () => (typeof body === 'string' ? body : JSON.stringify(body)),
 });
 
-test('fetchReleases 在空陣列頁面停止', async () => {
-    globalThis.fetch = async () => mockResponse([]);
-    const releases = await fetchReleases('https://gitea.example.com/api/v1/repos/o/r/releases');
-    assert.deepEqual(releases, []);
-});
-
-test('fetchReleases 帶上授權標頭', async () => {
-    let seenHeaders;
-    globalThis.fetch = async (_url, opts) => {
-        seenHeaders = opts.headers;
-        return mockResponse([]);
-    };
-
-    await fetchReleases('https://gitea.example.com/api/v1/repos/o/r/releases', { token: 'secret' });
-    assert.equal(seenHeaders.Authorization, 'token secret');
-});
-
-test('fetchReleases 在 HTTP 錯誤時丟出例外', async () => {
-    globalThis.fetch = async () => ({ ok: false, status: 500 });
-    await assert.rejects(
-        () => fetchReleases('https://gitea.example.com/api/v1/repos/o/r/releases'),
-        /release API 請求失敗/,
+test('fetchReleases 單頁（不足一頁即停止）', async () => {
+    await withFetch(
+        async () => jsonResponse([{ tag_name: 'v1.0.0' }]),
+        async () => {
+            const releases = await fetchReleases('https://gitea.example.com/api');
+            assert.deepEqual(releases, [{ tag_name: 'v1.0.0' }]);
+        },
     );
 });
 
-test('fetchReleases 在回傳非陣列時丟出例外', async () => {
-    globalThis.fetch = async () => mockResponse({ message: 'not an array' });
-    await assert.rejects(
-        () => fetchReleases('https://gitea.example.com/api/v1/repos/o/r/releases'),
-        /回傳非陣列資料/,
+test('fetchReleases 跨頁合併直到不足一頁', async () => {
+    const pages = {
+        1: Array.from({ length: 10 }, (_, i) => ({ tag_name: `v1.0.${i}` })),
+        2: [{ tag_name: 'v1.1.0' }],
+    };
+    const seen = [];
+
+    await withFetch(
+        async (url) => {
+            const page = Number(new URL(url).searchParams.get('page'));
+            seen.push(page);
+            return jsonResponse(pages[page]);
+        },
+        async () => {
+            const releases = await fetchReleases('https://gitea.example.com/api');
+            assert.equal(releases.length, 11);
+            assert.deepEqual(seen, [1, 2]);
+        },
     );
 });
 
-test('fetchReleases 在 null 回應時視為無更多資料', async () => {
-    globalThis.fetch = async () => ({ ok: true, text: async () => 'null' });
-    const releases = await fetchReleases('https://gitea.example.com/api/v1/repos/o/r/releases');
-    assert.deepEqual(releases, []);
+test('fetchReleases 對非 2xx 回應拋錯', async () => {
+    await withFetch(
+        async () => jsonResponse('Not Found', false),
+        async () => {
+            await assert.rejects(
+                () => fetchReleases('https://gitea.example.com/api'),
+                /release API 請求失敗/,
+            );
+        },
+    );
+});
+
+test('fetchReleases 對無法解析的 JSON 回應拋錯', async () => {
+    await withFetch(
+        async () => jsonResponse('{ this is not valid json', true),
+        async () => {
+            await assert.rejects(
+                () => fetchReleases('https://gitea.example.com/api'),
+                /回傳資料無法解析/,
+            );
+        },
+    );
+});
+
+test('fetchReleases 對非陣列回應拋錯', async () => {
+    await withFetch(
+        async () => jsonResponse({ message: 'oops' }),
+        async () => {
+            await assert.rejects(
+                () => fetchReleases('https://gitea.example.com/api'),
+                /回傳非陣列資料/,
+            );
+        },
+    );
+});
+
+test('fetchReleases 有 token 時帶入授權標頭', async () => {
+    let captured;
+
+    await withFetch(
+        async (url, options) => {
+            captured = options;
+            return jsonResponse([]);
+        },
+        async () => {
+            await fetchReleases('https://gitea.example.com/api', { token: 'secret' });
+            assert.equal(captured.headers.Authorization, 'token secret');
+        },
+    );
 });