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'use strict';
// Test is based on the following editor draft:
// https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.html
// Code using this helper should also include RTCPeerConnection-helper.js
// in the main HTML file
// The following helper functions are called from RTCPeerConnection-helper.js:
// getTrackFromUserMedia
// Create a RTCDTMFSender using getUserMedia()
function createDtmfSender(pc = new RTCPeerConnection()) {
return getTrackFromUserMedia('audio')
.then(([track, mediaStream]) => {
const sender = pc.addTrack(track, mediaStream);
const dtmfSender = sender.dtmf;
assert_true(dtmfSender instanceof RTCDTMFSender,
'Expect audio sender.dtmf to be set to a RTCDTMFSender');
return dtmfSender;
});
}
/*
Create an RTCDTMFSender and test tonechange events on it.
testFunc
Test function that is going to manipulate the DTMFSender.
It will be called with:
t - the test object
sender - the created RTCDTMFSender
pc - the associated RTCPeerConnection as second argument.
toneChanges
Array of expected tonechange events fired. The elements
are array of 3 items:
expectedTone
The expected character in event.tone
expectedToneBuffer
The expected new value of dtmfSender.toneBuffer
expectedDuration
The rough time since beginning or last tonechange event
was fired.
desc
Test description.
*/
function test_tone_change_events(testFunc, toneChanges, desc) {
async_test(t => {
const pc = new RTCPeerConnection();
createDtmfSender(pc)
.then(dtmfSender => {
let lastEventTime = Date.now();
const onToneChange = t.step_func(ev => {
assert_true(ev instanceof RTCDTMFToneChangeEvent,
'Expect tone change event object to be an RTCDTMFToneChangeEvent');
const { tone } = ev;
assert_equals(typeof tone, 'string',
'Expect event.tone to be the tone string');
assert_greater_than(toneChanges.length, 0,
'More tonechange event is fired than expected');
const [
expectedTone, expectedToneBuffer, expectedDuration
] = toneChanges.shift();
assert_equals(tone, expectedTone,
`Expect current event.tone to be ${expectedTone}`);
assert_equals(dtmfSender.toneBuffer, expectedToneBuffer,
`Expect dtmfSender.toneBuffer to be updated to ${expectedToneBuffer}`);
const now = Date.now();
const duration = now - lastEventTime;
assert_approx_equals(duration, expectedDuration, 250,
`Expect tonechange event for "${tone}" to be fired approximately after ${expectedDuration} milliseconds`);
lastEventTime = now;
if(toneChanges.length === 0) {
// Wait for same duration as last expected duration + 100ms
// before passing test in case there are new tone events fired,
// in which case the test should fail.
t.step_timeout(
t.step_func(() => {
t.done();
pc.close();
}), expectedDuration + 100);
}
});
dtmfSender.addEventListener('tonechange', onToneChange);
testFunc(t, dtmfSender, pc);
})
.catch(t.step_func(err => {
assert_unreached(`Unexpected promise rejection: ${err}`);
}));
}, desc);
}
// Get the one and only tranceiver from pc.getTransceivers().
// Assumes that there is only one tranceiver in pc.
function getTransceiver(pc) {
const transceivers = pc.getTransceivers();
assert_equals(transceivers.length, 1,
'Expect there to be only one tranceiver in pc');
return transceivers[0];
}
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