<!doctype html> <html> <head> <title>Trivial mandatory constraint in getUserMedia</title> <link rel="author" title="Dominique Hazael-Massieux" href="mailto:dom@w3.org"/> <link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#widl-NavigatorUserMedia-getUserMedia-void-MediaStreamConstraints-constraints-NavigatorUserMediaSuccessCallback-successCallback-NavigatorUserMediaErrorCallback-errorCallback"> </head> <body> <p class="instructions">When prompted, accept to share your video stream.</p> <h1 class="instructions">Description</h1> <p class="instructions">This test checks that setting a trivial mandatory constraint (width >=0) in getUserMedia works</p> <div id='log'></div> <script src=/resources/testharness.js></script> <script src=/resources/testharnessreport.js></script> <script src=/resources/testdriver.js></script> <script src=/resources/testdriver-vendor.js></script> <script src=permission-helper.js></script> <script> promise_test(async () => { await setMediaPermission(); try { const stream = await navigator.mediaDevices.getUserMedia({video: {width: {min:0}}}) assert_equals(stream.getVideoTracks().length, 1, "the media stream has exactly one video track"); } catch (error) { assert_unreached("a Video stream of minimally zero width can always be created"); } }, "Tests that setting a trivial mandatory constraint in getUserMedia works"); </script> </body> </html>