From 4c6b7edecf0753fef7af6e7520884799bc08fe8d Mon Sep 17 00:00:00 2001
From: ennmichael <enntheprogrammer@gmail.com>
Date: Sat, 1 Apr 2023 14:47:37 +0200
Subject: [PATCH] test

---
 packages/nostr/src/event/deletion.ts |  2 +-
 packages/nostr/test/deletion.ts      | 72 ++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+), 1 deletion(-)
 create mode 100644 packages/nostr/test/deletion.ts

diff --git a/packages/nostr/src/event/deletion.ts b/packages/nostr/src/event/deletion.ts
index 227f2cc3..1fa8cca7 100644
--- a/packages/nostr/src/event/deletion.ts
+++ b/packages/nostr/src/event/deletion.ts
@@ -38,7 +38,7 @@ export function getEvents(this: Deletion): EventId[] {
   return this.tags
     .filter((tag) => tag[0] === "e")
     .map((tag) => {
-      if (tag[1] !== undefined) {
+      if (tag[1] === undefined) {
         throw new NostrError(
           `invalid deletion event tag: ${JSON.stringify(tag)}`
         )
diff --git a/packages/nostr/test/deletion.ts b/packages/nostr/test/deletion.ts
new file mode 100644
index 00000000..d60539f2
--- /dev/null
+++ b/packages/nostr/test/deletion.ts
@@ -0,0 +1,72 @@
+import { EventKind } from "../src/event"
+import { parsePublicKey } from "../src/crypto"
+import assert from "assert"
+import { setup } from "./setup"
+import { createTextNote } from "../src/event/text"
+import { createDeletion } from "../src/event/deletion"
+
+describe("deletion", () => {
+  // Test that a deletion event deletes existing events. Test that the deletion event
+  // is propagated to subscribers.
+  it("deletes existing events", (done) => {
+    setup(
+      done,
+      ({
+        publisher,
+        publisherSecret,
+        publisherPubkey,
+        subscriber,
+        timestamp,
+        done,
+      }) => {
+        // The event ID to delete.
+        let textNoteId: string
+        // The deletion event ID.
+        let deletionId: string
+
+        // Expect the deletion event (and not the text note event).
+        subscriber.on("event", ({ event }) => {
+          assert.strictEqual(event.kind, EventKind.Deletion)
+          assert.strictEqual(event.id, deletionId)
+          assert.strictEqual(event.pubkey, parsePublicKey(publisherPubkey))
+          assert.strictEqual(event.created_at, timestamp)
+          assert.strictEqual(event.content, "")
+          if (event.kind === EventKind.Deletion) {
+            assert.deepStrictEqual(event.getEvents(), [textNoteId])
+          }
+          done()
+        })
+
+        createTextNote("hello world", publisherSecret).then((textNote) => {
+          textNoteId = textNote.id
+          publisher.publish({
+            ...textNote,
+            created_at: timestamp,
+          })
+        })
+
+        publisher.on("ok", async ({ eventId, ok }) => {
+          assert.strictEqual(ok, true)
+
+          if (eventId === textNoteId) {
+            // After the text note has been published, delete it.
+            const deletion = await createDeletion(
+              { events: [textNoteId] },
+              publisherSecret
+            )
+            deletionId = deletion.id
+            publisher.publish({
+              ...deletion,
+              created_at: timestamp,
+            })
+          }
+
+          if (eventId === deletionId) {
+            // After the deletion has been published, subscribe to the publisher.
+            subscriber.subscribe([])
+          }
+        })
+      }
+    )
+  })
+})