Add webrtc stats in full mesh calls (#3232)

* stats: merge stats classes in this branch

* stats: merge call object

* stats: merge export metric events

* stats: fix code style changes

* stats: add missing stats value formatter

* stats: add missing methode to call mock

* stats: add stats for callee

* stats: stop sending stats if call finish

* stats: rename StatsCollector to StatsReportGatherer

spec/unit/webrtc/stats/statsReportEmitter.spec.ts

@@ -0,0 +1,48 @@
+/*
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+import { StatsReportEmitter } from "../../../../src/webrtc/stats/statsReportEmitter";
+import { ByteSentStatsReport, ConnectionStatsReport, StatsReport } from "../../../../src/webrtc/stats/statsReport";
+
+describe("StatsReportEmitter", () => {
+    let emitter: StatsReportEmitter;
+    beforeEach(() => {
+        emitter = new StatsReportEmitter();
+    });
+
+    it("should emit and receive ByteSendStatsReport", async () => {
+        const report = {} as ByteSentStatsReport;
+        return new Promise((resolve, _) => {
+            emitter.on(StatsReport.BYTE_SENT_STATS, (r) => {
+                expect(r).toBe(report);
+                resolve(null);
+                return;
+            });
+            emitter.emitByteSendReport(report);
+        });
+    });
+
+    it("should emit and receive ConnectionStatsReport", async () => {
+        const report = {} as ConnectionStatsReport;
+        return new Promise((resolve, _) => {
+            emitter.on(StatsReport.CONNECTION_STATS, (r) => {
+                expect(r).toBe(report);
+                resolve(null);
+                return;
+            });
+            emitter.emitConnectionStatsReport(report);
+        });
+    });
+});