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

apps/web/test/unit-tests/editor/position-test.ts

@@ -0,0 +1,73 @@
+/*
+Copyright 2024 New Vector Ltd.
+Copyright 2019 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 EditorModel from "../../../src/editor/model";
+import { createPartCreator, createRenderer } from "./mock";
+
+describe("editor/position", function () {
+    it("move first position backward in empty model", function () {
+        const model = new EditorModel([], createPartCreator(), createRenderer());
+        const pos = model.positionForOffset(0, true);
+        const pos2 = pos.backwardsWhile(model, () => true);
+        expect(pos).toBe(pos2);
+    });
+    it("move first position forwards in empty model", function () {
+        const model = new EditorModel([], createPartCreator(), createRenderer());
+        const pos = model.positionForOffset(0, true);
+        const pos2 = pos.forwardsWhile(model, () => true);
+        expect(pos).toBe(pos2);
+    });
+    it("move forwards within one part", function () {
+        const pc = createPartCreator();
+        const model = new EditorModel([pc.plain("hello")], pc, createRenderer());
+        const pos = model.positionForOffset(1);
+        let n = 3;
+        const pos2 = pos.forwardsWhile(model, () => {
+            n -= 1;
+            return n >= 0;
+        });
+        expect(pos2.index).toBe(0);
+        expect(pos2.offset).toBe(4);
+    });
+    it("move forwards crossing to other part", function () {
+        const pc = createPartCreator();
+        const model = new EditorModel([pc.plain("hello"), pc.plain(" world")], pc, createRenderer());
+        const pos = model.positionForOffset(4);
+        let n = 3;
+        const pos2 = pos.forwardsWhile(model, () => {
+            n -= 1;
+            return n >= 0;
+        });
+        expect(pos2.index).toBe(1);
+        expect(pos2.offset).toBe(2);
+    });
+    it("move backwards within one part", function () {
+        const pc = createPartCreator();
+        const model = new EditorModel([pc.plain("hello")], pc, createRenderer());
+        const pos = model.positionForOffset(4);
+        let n = 3;
+        const pos2 = pos.backwardsWhile(model, () => {
+            n -= 1;
+            return n >= 0;
+        });
+        expect(pos2.index).toBe(0);
+        expect(pos2.offset).toBe(1);
+    });
+    it("move backwards crossing to other part", function () {
+        const pc = createPartCreator();
+        const model = new EditorModel([pc.plain("hello"), pc.plain(" world")], pc, createRenderer());
+        const pos = model.positionForOffset(7);
+        let n = 3;
+        const pos2 = pos.backwardsWhile(model, () => {
+            n -= 1;
+            return n >= 0;
+        });
+        expect(pos2.index).toBe(0);
+        expect(pos2.offset).toBe(4);
+    });
+});