初始化

client/jest.setup.js

@@ -0,0 +1,35 @@
+/* eslint-disable no-undef */
+import fetch from 'node-fetch';
+import { TextEncoder, TextDecoder } from 'util';
+import { PeerConnectionMock, SessionDescriptionMock, IceCandidateMock } from './test/peerconnectionmock';
+import ResizeObserverMock from './test/resizeobservermock';
+
+// note: If set testEnvironment `jest-environment-jsdom`,  below classes are not defined.
+
+if (!window.fetch) {
+  window.fetch = fetch;
+}
+
+if (!window.TextEncoder) {
+  window.TextEncoder = TextEncoder;
+}
+
+if (!window.TextDecoder) {
+  window.TextDecoder = TextDecoder;
+}
+
+if (!window.RTCPeerConnection) {
+  window.RTCPeerConnection = PeerConnectionMock;
+}
+
+if (!window.RTCSessionDescription) {
+  window.RTCSessionDescription = SessionDescriptionMock;
+}
+
+if (!window.RTCIceCandidate) {
+  window.RTCIceCandidate = IceCandidateMock;
+}
+
+if (!window.ResizeObserver) {
+  window.ResizeObserver = ResizeObserverMock;
+}