test(release-cleanup): 補齊 cleanup/config/main 與新驗證函式測試

新增 cleanupReleases、cleanupOrphanTags 的失敗路徑與分類測試、
loadConfig 環境變數驗證測試、main 整合測試,以及 requireUrl/
requireRepository 與 content-type 檢查測試。測試共 41 項全數通過。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/test/releases.test.js

@@ -1,6 +1,6 @@
 import { test } from 'node:test'
 import assert from 'node:assert/strict'
-import { selectReleasesToDelete } from '../releases.js'
+import { selectReleasesToDelete, cleanupReleases } from '../releases.js'
 
 const releases = [
   { id: 1, tag_name: 'v1.0.0', created_at: '2024-01-01T00:00:00Z' },
@@ -32,3 +32,74 @@ test('selectReleasesToDelete 不改動原陣列', () => {
   selectReleasesToDelete(releases, 1)
   assert.deepEqual(releases, original)
 })
+
+test('selectReleasesToDelete 對無效 created_at 視為最舊,不產生 NaN 排序', () => {
+  const list = [
+    { id: 1, tag_name: 'good', created_at: '2024-05-01T00:00:00Z' },
+    { id: 2, tag_name: 'bad', created_at: 'not-a-date' },
+    { id: 3, tag_name: 'empty' },
+  ]
+  const toDelete = selectReleasesToDelete(list, 1)
+  // 最新的 good 被保留;兩筆無效日期視為最舊,落入待刪除
+  assert.equal(toDelete.length, 2)
+  assert.ok(!toDelete.some((r) => r.tag_name === 'good'))
+})
+
+// 建立可記錄刪除呼叫的假 client
+function fakeClient(releases, statusFor = () => 204) {
+  const deleted = []
+  return {
+    deleted,
+    async fetchAllPages() {
+      return releases
+    },
+    async deleteResource(url) {
+      deleted.push(url)
+      return statusFor(url)
+    },
+  }
+}
+
+test('cleanupReleases 刪除超出保留數的舊 release', async () => {
+  const client = fakeClient([
+    { id: 1, tag_name: 'v1', name: 'n1', created_at: '2024-01-01T00:00:00Z' },
+    { id: 2, tag_name: 'v2', name: 'n2', created_at: '2024-02-01T00:00:00Z' },
+    { id: 3, tag_name: 'v3', name: 'n3', created_at: '2024-03-01T00:00:00Z' },
+  ])
+  await cleanupReleases(client, { releaseApiUrl: 'http://x/releases', keepCount: 1 })
+  // 保留最新 v3,刪除 v2 與 v1
+  assert.deepEqual(client.deleted, ['http://x/releases/2', 'http://x/releases/1'])
+})
+
+test('cleanupReleases 在未超過保留數時不刪除', async () => {
+  const client = fakeClient([
+    { id: 1, tag_name: 'v1', name: 'n1', created_at: '2024-01-01T00:00:00Z' },
+  ])
+  await cleanupReleases(client, { releaseApiUrl: 'http://x/releases', keepCount: 2 })
+  assert.equal(client.deleted.length, 0)
+})
+
+test('cleanupReleases 在 deleteResource 回傳非 204 時仍繼續處理其餘項目', async () => {
+  const client = fakeClient(
+    [
+      { id: 1, tag_name: 'v1', name: 'n1', created_at: '2024-01-01T00:00:00Z' },
+      { id: 2, tag_name: 'v2', name: 'n2', created_at: '2024-02-01T00:00:00Z' },
+      { id: 3, tag_name: 'v3', name: 'n3', created_at: '2024-03-01T00:00:00Z' },
+    ],
+    (url) => (url.endsWith('/2') ? 500 : 204), // v2 刪除失敗
+  )
+  await cleanupReleases(client, { releaseApiUrl: 'http://x/releases', keepCount: 1 })
+  // 即使 v2 失敗(500),v1 仍被嘗試刪除
+  assert.deepEqual(client.deleted, ['http://x/releases/2', 'http://x/releases/1'])
+})
+
+test('cleanupReleases 略過沒有 id 的 release', async () => {
+  const client = fakeClient([
+    { id: 1, tag_name: 'v3', name: 'n3', created_at: '2024-03-01T00:00:00Z' },
+    { id: null, tag_name: 'v1', name: 'n1', created_at: '2024-01-01T00:00:00Z' },
+    { id: 2, tag_name: 'v2', name: 'n2', created_at: '2024-02-01T00:00:00Z' },
+  ])
+  await cleanupReleases(client, { releaseApiUrl: 'http://x/releases', keepCount: 1 })
+  // 保留最新 v3;待刪除為 v2 與 (無 id 的) v1 → 無 id 者被略過
+  assert.deepEqual(client.deleted, ['http://x/releases/2'])
+})