feat: show call participants in room list (Discord-style)

apps/web/test/unit-tests/slash-commands/join-test.ts

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2026 Element Creations Ltd.
+ * Copyright 2024 New Vector Ltd.
+ * Copyright 2022 The Matrix.org Foundation C.I.C.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+import { setUpCommandTest } from "./utils";
+import dispatcher from "../../../src/dispatcher/dispatcher";
+
+describe("/join", () => {
+    const roomId = "!room:example.com";
+
+    it("should return usage if no args", () => {
+        const { client, command } = setUpCommandTest(roomId, `/join`);
+        expect(command.run(client, roomId, null, undefined).error).toBe(command.getUsage());
+    });
+
+    it("should handle matrix.org permalinks", async () => {
+        const { client, command } = setUpCommandTest(roomId, `/join`);
+        jest.spyOn(dispatcher, "dispatch");
+
+        await command.run(client, roomId, null, "https://matrix.to/#/!roomId:server/$eventId").promise;
+
+        expect(dispatcher.dispatch).toHaveBeenCalledWith(
+            expect.objectContaining({
+                action: "view_room",
+                room_id: "!roomId:server",
+                event_id: "$eventId",
+                highlighted: true,
+            }),
+        );
+    });
+
+    it("should handle room aliases", async () => {
+        const { client, command } = setUpCommandTest(roomId, `/join`);
+        jest.spyOn(dispatcher, "dispatch");
+
+        await command.run(client, roomId, null, "#test:server").promise;
+
+        expect(dispatcher.dispatch).toHaveBeenCalledWith(
+            expect.objectContaining({
+                action: "view_room",
+                room_alias: "#test:server",
+            }),
+        );
+    });
+
+    it("should handle room aliases with no server component", async () => {
+        const { client, command } = setUpCommandTest(roomId, `/join`);
+        jest.spyOn(dispatcher, "dispatch");
+
+        await command.run(client, roomId, null, "#test").promise;
+
+        expect(dispatcher.dispatch).toHaveBeenCalledWith(
+            expect.objectContaining({
+                action: "view_room",
+                room_alias: `#test:${client.getDomain()}`,
+            }),
+        );
+    });
+
+    it("should handle room IDs and via servers", async () => {
+        const { client, command } = setUpCommandTest(roomId, `/join`);
+        jest.spyOn(dispatcher, "dispatch");
+
+        await command.run(client, roomId, null, "!foo:bar serv1.com serv2.com").promise;
+
+        expect(dispatcher.dispatch).toHaveBeenCalledWith(
+            expect.objectContaining({
+                action: "view_room",
+                room_id: "!foo:bar",
+                via_servers: ["serv1.com", "serv2.com"],
+            }),
+        );
+    });
+});