rename extmap common shim

and add units tests
webrtcHacks · Feb 14, 2021 · 27d724f · 27d724f
1 parent 9d3f1c1
commit 27d724f
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Showing 3 changed files with 100 additions and 4 deletions.
diff --git a/src/js/adapter_factory.js b/src/js/adapter_factory.js
@@ -66,7 +66,7 @@ export function adapterFactory({window} = {}, options = {
       commonShim.shimConnectionState(window);
       commonShim.shimMaxMessageSize(window);
       commonShim.shimSendThrowTypeError(window);
-      commonShim.removeAllowExtmapMixed(window);
+      commonShim.removeExtmapAllowMixed(window, browserDetails);
       break;
     case 'firefox':
       if (!firefoxShim || !firefoxShim.shimPeerConnection ||
@@ -141,7 +141,7 @@ export function adapterFactory({window} = {}, options = {
       commonShim.shimRTCIceCandidate(window);
       commonShim.shimMaxMessageSize(window);
       commonShim.shimSendThrowTypeError(window);
-      commonShim.removeAllowExtmapMixed(window);
+      commonShim.removeExtmapAllowMixed(window, browserDetails);
       break;
     default:
       logging('Unsupported browser!');

diff --git a/src/js/common_shim.js b/src/js/common_shim.js
@@ -317,12 +317,11 @@ export function shimConnectionState(window) {
   });
 }
 
-export function removeAllowExtmapMixed(window) {
+export function removeExtmapAllowMixed(window, browserDetails) {
   /* remove a=extmap-allow-mixed for webrtc.org < M71 */
   if (!window.RTCPeerConnection) {
     return;
   }
-  const browserDetails = utils.detectBrowser(window);
   if (browserDetails.browser === 'chrome' && browserDetails.version >= 71) {
     return;
   }

diff --git a/test/unit/extmap-allow-mixed.js b/test/unit/extmap-allow-mixed.js
@@ -0,0 +1,97 @@
+/*
+ *  Copyright (c) 2021 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+const chai = require('chai');
+const expect = chai.expect;
+const sinon = require('sinon');
+const sinonChai = require('sinon-chai');
+chai.use(sinonChai);
+
+describe('removal of extmap-allow-mixed', () => {
+  const shim = require('../../dist/common_shim');
+  let window;
+  let origSetRemoteDescription;
+  beforeEach(() => {
+    window = {
+      RTCPeerConnection: sinon.stub(),
+    };
+    origSetRemoteDescription = sinon.stub();
+    window.RTCPeerConnection.prototype.setRemoteDescription =
+      origSetRemoteDescription;
+  });
+
+  const sdp = 'a=extmap-allow-mixed\r\n';
+
+  describe('does nothing if', () => {
+    it('RTCPeerConnection is not defined', () => {
+      expect(() => shim.removeExtmapAllowMixed({}, {})).not.to.throw();
+    });
+  });
+
+  describe('Chrome behaviour', () => {
+    let browserDetails;
+    // Override addIceCandidate to simulate legacy behaviour.
+    beforeEach(() => {
+      window.RTCPeerConnection.prototype.setRemoteDescription = function() {
+        return origSetRemoteDescription.apply(this, arguments);
+      };
+      browserDetails = {browser: 'chrome', version: '88'};
+    });
+
+    it('does not remove the extmap-allow-mixed line after Chrome 71', () => {
+      browserDetails.version = 71;
+      shim.removeExtmapAllowMixed(window, browserDetails);
+
+      const pc = new window.RTCPeerConnection();
+      pc.setRemoteDescription({sdp: '\n' + sdp});
+      expect(origSetRemoteDescription.firstCall.args[0].sdp)
+        .to.equal('\n' + sdp);
+    });
+
+    it('does remove the extmap-allow-mixed line before Chrome 71', () => {
+      browserDetails.version = 70;
+      shim.removeExtmapAllowMixed(window, browserDetails);
+
+      const pc = new window.RTCPeerConnection();
+      pc.setRemoteDescription({sdp: '\n' + sdp});
+      console.log(origSetRemoteDescription.firstCall.args);
+      expect(origSetRemoteDescription.firstCall.args[0].sdp).to.equal('\n');
+    });
+  });
+
+  describe('Safari behaviour', () => {
+    let browserDetails;
+    // Override addIceCandidate to simulate legacy behaviour.
+    beforeEach(() => {
+      window.RTCPeerConnection.prototype.setRemoteDescription = function() {
+        return origSetRemoteDescription.apply(this, arguments);
+      };
+      browserDetails = {browser: 'safari', version: '605'};
+    });
+
+    it('does not remove the extmap-allow-mixed line after 605', () => {
+      browserDetails.version = 605;
+      shim.removeExtmapAllowMixed(window, browserDetails);
+
+      const pc = new window.RTCPeerConnection();
+      pc.setRemoteDescription({sdp: '\n' + sdp});
+      expect(origSetRemoteDescription.firstCall.args[0].sdp)
+        .to.equal('\n' + sdp);
+    });
+
+    it('does remove the extmap-allow-mixed line before 605', () => {
+      browserDetails.version = 604;
+      shim.removeExtmapAllowMixed(window, browserDetails);
+
+      const pc = new window.RTCPeerConnection();
+      pc.setRemoteDescription({sdp: '\n' + sdp});
+      console.log(origSetRemoteDescription.firstCall.args);
+      expect(origSetRemoteDescription.firstCall.args[0].sdp).to.equal('\n');
+    });
+  });
+});