Set voice broadcast defaults (#9471)

test/voice-broadcast/utils/getChunkLength-test.ts

@@ -0,0 +1,60 @@
+/*
+Copyright 2022 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 { mocked } from "jest-mock";
+
+import SdkConfig, { DEFAULTS } from "../../../src/SdkConfig";
+import { getChunkLength } from "../../../src/voice-broadcast/utils/getChunkLength";
+
+jest.mock("../../../src/SdkConfig");
+
+describe("getChunkLength", () => {
+    afterEach(() => {
+        jest.resetAllMocks();
+    });
+
+    describe("when there is a value provided by Sdk config", () => {
+        beforeEach(() => {
+            mocked(SdkConfig.get).mockReturnValue({ chunk_length: 42 });
+        });
+
+        it("should return this value", () => {
+            expect(getChunkLength()).toBe(42);
+        });
+    });
+
+    describe("when Sdk config does not provide a value", () => {
+        beforeEach(() => {
+            DEFAULTS.voice_broadcast = {
+                chunk_length: 23,
+            };
+        });
+
+        it("should return this value", () => {
+            expect(getChunkLength()).toBe(23);
+        });
+    });
+
+    describe("if there are no defaults", () => {
+        beforeEach(() => {
+            DEFAULTS.voice_broadcast = undefined;
+        });
+
+        it("should return the fallback value", () => {
+            expect(getChunkLength()).toBe(120);
+        });
+    });
+});