Route IPC send_message by paired room role

src/router.test.ts

@@ -0,0 +1,54 @@
+import { describe, expect, it } from 'vitest';
+
+import { findChannelForDeliveryRole } from './router.js';
+import { type Channel } from './types.js';
+
+function createChannel(name: string, ownedJids: string[]): Channel {
+  return {
+    name,
+    connect: async () => {},
+    sendMessage: async () => {},
+    isConnected: () => true,
+    ownsJid: (jid) => ownedJids.includes(jid),
+    disconnect: async () => {},
+  };
+}
+
+describe('findChannelForDeliveryRole', () => {
+  const jid = 'dc:123';
+
+  it('prefers the reviewer channel for reviewer IPC messages', () => {
+    const ownerChannel = createChannel('discord-main', [jid]);
+    const reviewerChannel = createChannel('discord-review', [jid]);
+
+    expect(
+      findChannelForDeliveryRole(
+        [ownerChannel, reviewerChannel],
+        jid,
+        'reviewer',
+      ),
+    ).toBe(reviewerChannel);
+  });
+
+  it('prefers the arbiter channel for arbiter IPC messages', () => {
+    const ownerChannel = createChannel('discord-main', [jid]);
+    const reviewerChannel = createChannel('discord-review', [jid]);
+    const arbiterChannel = createChannel('discord-arbiter', [jid]);
+
+    expect(
+      findChannelForDeliveryRole(
+        [ownerChannel, reviewerChannel, arbiterChannel],
+        jid,
+        'arbiter',
+      ),
+    ).toBe(arbiterChannel);
+  });
+
+  it('falls back to the first JID-owning channel when no role channel exists', () => {
+    const ownerChannel = createChannel('discord-main', [jid]);
+
+    expect(findChannelForDeliveryRole([ownerChannel], jid, 'reviewer')).toBe(
+      ownerChannel,
+    );
+  });
+});