fix api tests

api_tests/src/post.spec.ts

@@ -55,7 +55,20 @@ afterAll(() => {
   unfollows();
 });
 
-function assertPostFederation(postOne?: PostView, postTwo?: PostView) {
+async function assertPostFederation(postOne: PostView, postTwo: PostView) {
+  // Link metadata is generated in background task and may not be ready yet at this time,
+  // so wait for it explicitly.
+  postOne = await waitForPost(
+    beta,
+    postOne.post,
+    res => res?.post.embed_title != null,
+  );
+  postTwo = await waitForPost(
+    beta,
+    postTwo.post,
+    res => res?.post.embed_title != null,
+  );
+
   expect(postOne?.post.ap_id).toBe(postTwo?.post.ap_id);
   expect(postOne?.post.name).toBe(postTwo?.post.name);
   expect(postOne?.post.body).toBe(postTwo?.post.body);
@@ -372,7 +385,7 @@ test("Remove a post from admin and community on different instance", async () =>
   // Make sure lemmy beta sees post is undeleted
   let betaPost2 = (await resolvePost(beta, postRes.post_view.post)).post;
   expect(betaPost2?.post.removed).toBe(false);
-  assertPostFederation(betaPost2, undeletedPost.post_view);
+  assertPostFederation(betaPost2!, undeletedPost.post_view);
 });
 
 test("Remove a post from admin and community on same instance", async () => {