add support for stubbing out getUserMedia for now..

package.json

@@ -38,6 +38,7 @@
 		"chai": "^4.2.0",
 		"mocha": "^7.1.1",
 		"nyc": "^15.0.1",
+		"sinon": "^9.0.2",
 		"webpack": "^4.42.1",
 		"webpack-cli": "^3.3.11"
 	},

src/index/index.spec.js

@@ -1,12 +1,38 @@
 'use strict'
 
+const sinon = require('sinon')
 const index = require('../index')
 const expect = require('chai').expect
 
+var navigator;
+
+function setupBrowser() {
+	navigator = {
+		mediaDevices: {
+			getUserMedia: () => { console.log('dummy'); throw 'failure'; }
+		}
+	}
+	global.navigator = navigator;
+}
+
 describe('index module', () => {
 	describe('"members"', () => {
 		it('should be have the following members', () => {
 			expect(global.runPage).to.be.a('function');
 		})
 	})
+	describe('"runPage"', () => {
+		it('should call getUserMedia', async () => {
+			setupBrowser();
+
+			var gum = sinon.stub(navigator.mediaDevices, 'getUserMedia');
+			gum.onFirstCall().returns(true);
+
+			await global.runPage();
+
+			expect(gum.calledOnce).to.be.true;
+
+			gum.restore();
+		})
+	})
 })