Filter unattributed successful messages

tests/repositories.test.ts

@@ -431,11 +431,15 @@ describe('MessagesRepository', () => {
 
 describe('SuccessfulMessagesRepository', () => {
   let successfulMessagesRepo: SuccessfulMessagesRepository;
+  let postsRepo: PostsRepository;
+  let messagesRepo: MessagesRepository;
   let db: Database;
 
   beforeEach(() => {
     const repos = createTestRepositories();
     successfulMessagesRepo = repos.successfulMessagesRepo;
+    postsRepo = repos.postsRepo;
+    messagesRepo = repos.messagesRepo;
     db = repos.db;
   });
 
@@ -520,6 +524,46 @@ describe('SuccessfulMessagesRepository', () => {
     expect(recent[0].subreddit).toBeNull();
   });
 
+  it('returns only examples attributable to a post, strategy, or subreddit', () => {
+    postsRepo.insert({
+      id: 'source-post',
+      subreddit: 'example',
+      author: 'alice',
+      title: 'Source post',
+      imageUrl: null,
+      processedAt: Date.now(),
+    });
+    const sentMessageId = messagesRepo.insert({
+      postId: 'source-post',
+      recipient: 'alice',
+      subject: 'alice',
+      message: 'Attributed opener',
+      sentAt: Date.now(),
+      strategyId: 'direct',
+    });
+    successfulMessagesRepo.insert({
+      sentMessageId,
+      originalMessage: 'Attributed opener',
+      imageAnalysis: null,
+      postTitle: 'Source post',
+      responseSnippet: 'Hello',
+      subreddit: null,
+    });
+    successfulMessagesRepo.insert({
+      sentMessageId: null,
+      originalMessage: 'Legacy unknown opener',
+      imageAnalysis: null,
+      postTitle: 'Chat with t2_unknown',
+      responseSnippet: 'Hello',
+      subreddit: null,
+    });
+
+    expect(successfulMessagesRepo.getAttributedRecent(10)).toEqual([
+      expect.objectContaining({ originalMessage: 'Attributed opener' }),
+    ]);
+    expect(successfulMessagesRepo.getRecent(10)).toHaveLength(2);
+  });
+
   it('returns most recent examples first', () => {
     for (let i = 0; i < 5; i++) {
       successfulMessagesRepo.insert({