test that feed holes are also cleaned up

test/feed-holes.test.js

@@ -0,0 +1,66 @@
+const test = require('node:test')
+const assert = require('node:assert')
+const p = require('node:util').promisify
+const { createPeer } = require('./util')
+
+function getTexts(msgs) {
+  return msgs.filter((msg) => msg.data?.text).map((msg) => msg.data.text)
+}
+
+test('feed holes', async (t) => {
+  const alice = createPeer({
+    name: 'alice',
+    gc: { maxLogBytes: 100 * 1024 * 1024 },
+  })
+
+  await alice.db.loaded()
+
+  // Alice creates her own account
+  const aliceID = await p(alice.db.account.create)({
+    domain: 'account',
+    _nonce: 'alice',
+  })
+
+  const posts = []
+  for (let i = 0; i < 10; i++) {
+    const rec = await p(alice.db.feed.publish)({
+      account: aliceID,
+      domain: 'post',
+      data: { text: 'A' + i },
+    })
+    posts.push(rec.id)
+  }
+
+  assert.deepEqual(
+    getTexts([...alice.db.msgs()]),
+    ['A0', 'A1', 'A2', 'A3', 'A4', 'A5', 'A6', 'A7', 'A8', 'A9'],
+    'alice has the whole feed'
+  )
+
+  await p(alice.db.del)(posts[3])
+  await p(alice.db.del)(posts[4])
+  await p(alice.db.del)(posts[5])
+  await p(alice.db.del)(posts[6])
+  assert('alice deleted the middle part of the feed')
+
+  assert.deepEqual(
+    getTexts([...alice.db.msgs()]),
+    ['A0', 'A1', 'A2', 'A7', 'A8', 'A9'],
+    'alice has the beginning and the end of the feed'
+  )
+
+  alice.goals.set(aliceID, 'all') // alice wants her account tangle
+  const postFeedID = alice.db.feed.getID(aliceID, 'post')
+  alice.goals.set(postFeedID, 'newest-3')
+  assert('alice set a goal for newest-3 of post feed')
+
+  await p(alice.gc.forceImmediately)()
+
+  assert.deepEqual(
+    getTexts([...alice.db.msgs()]),
+    ['A7', 'A8', 'A9'],
+    'alice has only the end of the feed'
+  )
+
+  await p(alice.close)(true)
+})