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packages/system/tests/event-ext.test.ts

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+import { EventExt } from "../src/event-ext";
+
+describe("NIP-10", () => {
+  it("should extract thread", () => {
+    const a = {
+      content: "This is the problem with Lightning....",
+      id: "868187063f...",
+      kind: 1,
+      created_at: 1,
+      pubkey: "test",
+      sig: "test",
+      tags: [
+        ["e", "cbf2375078..."],
+        ["e", "977ac5d3b6..."],
+        ["e", "8f99ca1363..."],
+      ],
+    };
+
+    const b = {
+      content: "This is a good point, but your ...",
+      id: "434ad4a646...",
+      kind: 1,
+      created_at: 1,
+      pubkey: "test",
+      sig: "test",
+      tags: [
+        ["e", "cbf2375078..."],
+        ["e", "868187063f..."],
+        ["e", "6834ffc491..."],
+      ],
+    };
+
+    const c = {
+      content: "There is some middle ground ...",
+      id: "6834ffc491...",
+      kind: 1,
+      created_at: 1,
+      pubkey: "test",
+      sig: "test",
+      tags: [
+        ["e", "cbf2375078...", "", "root"],
+        ["e", "868187063f...", "", "reply"],
+      ],
+    };
+
+    expect(EventExt.extractThread(a)).toMatchObject({
+      root: { key: "e", value: "cbf2375078...", marker: "root" },
+      replyTo: { key: "e", value: "8f99ca1363...", marker: "reply" },
+      mentions: [{ key: "e", value: "977ac5d3b6...", marker: "mention" }],
+    });
+    expect(EventExt.extractThread(b)).toMatchObject({
+      root: { key: "e", value: "cbf2375078...", marker: "root" },
+      replyTo: { key: "e", value: "6834ffc491...", marker: "reply" },
+      mentions: [{ key: "e", value: "868187063f...", marker: "mention" }],
+    });
+    expect(EventExt.extractThread(c)).toMatchObject({
+      root: { key: "e", value: "cbf2375078...", relay: "", marker: "root" },
+      replyTo: { key: "e", value: "868187063f...", relay: "", marker: "reply" },
+      mentions: [],
+    });
+  });
+});