1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection.prototype.setLocalDescription</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>
'use strict';
// Test is based on the following editor draft:
// https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.html
// The following helper functions are called from RTCPeerConnection-helper.js:
// generateDataChannelOffer
// assert_session_desc_not_similar
// assert_session_desc_similar
/*
4.3.2. Interface Definition
[Constructor(optional RTCConfiguration configuration)]
interface RTCPeerConnection : EventTarget {
Promise<void> setRemoteDescription(
RTCSessionDescriptionInit description);
readonly attribute RTCSessionDescription? remoteDescription;
readonly attribute RTCSessionDescription? currentRemoteDescription;
readonly attribute RTCSessionDescription? pendingRemoteDescription;
...
};
4.6.2. RTCSessionDescription Class
dictionary RTCSessionDescriptionInit {
required RTCSdpType type;
DOMString sdp = "";
};
4.6.1. RTCSdpType
enum RTCSdpType {
"offer",
"pranswer",
"answer",
"rollback"
};
*/
/*
4.3.2. setLocalDescription
2. Let lastOffer be the result returned by the last call to createOffer.
5. If description.sdp is null and description.type is offer, set description.sdp
to lastOffer.
4.3.1.6. Set the RTCSessionSessionDescription
2.2.2. If description is set as a local description, then run one of the following
steps:
- If description is of type "offer", set connection.pendingLocalDescription
to description and signaling state to have-local-offer.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const states = [];
pc.addEventListener('signalingstatechange', () => states.push(pc.signalingState));
return generateAudioReceiveOnlyOffer(pc)
.then(offer =>
pc.setLocalDescription(offer)
.then(() => {
assert_equals(pc.signalingState, 'have-local-offer');
assert_session_desc_similar(pc.localDescription, offer);
assert_session_desc_similar(pc.pendingLocalDescription, offer);
assert_equals(pc.currentLocalDescription, null);
assert_array_equals(states, ['have-local-offer']);
}));
}, 'setLocalDescription with valid offer should succeed');
/*
4.3.2. setLocalDescription
2. Let lastOffer be the result returned by the last call to createOffer.
5. If description.sdp is null and description.type is offer, set description.sdp
to lastOffer.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return generateAudioReceiveOnlyOffer(pc)
.then(offer =>
pc.setLocalDescription({ type: 'offer' })
.then(() => {
assert_equals(pc.signalingState, 'have-local-offer');
assert_session_desc_similar(pc.localDescription, offer);
assert_session_desc_similar(pc.pendingLocalDescription, offer);
assert_equals(pc.currentLocalDescription, null);
}));
}, 'setLocalDescription with type offer and null sdp should use lastOffer generated from createOffer');
/*
4.3.2. setLocalDescription
2. Let lastOffer be the result returned by the last call to createOffer.
6. If description.type is offer and description.sdp does not match lastOffer,
reject the promise with a newly created InvalidModificationError and abort
these steps.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
return generateDataChannelOffer(pc)
.then(offer => pc2.setLocalDescription(offer))
.then(() => t.unreached_func("setLocalDescription should have rejected"),
(error) => assert_equals(error.name, 'InvalidModificationError'));
}, 'setLocalDescription() with offer not created by own createOffer() should reject with InvalidModificationError');
promise_test(t => {
// Create first offer with audio line, then second offer with
// both audio and video line. Since the second offer is the
// last offer, setLocalDescription would reject when setting
// with the first offer
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return generateAudioReceiveOnlyOffer(pc)
.then(offer1 =>
generateVideoReceiveOnlyOffer(pc)
.then(offer2 => {
assert_session_desc_not_similar(offer1, offer2);
return promise_rejects_dom(t, 'InvalidModificationError',
pc.setLocalDescription(offer1));
}));
}, 'Set created offer other than last offer should reject with InvalidModificationError');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const states = [];
pc.addEventListener('signalingstatechange', () => states.push(pc.signalingState));
return generateAudioReceiveOnlyOffer(pc)
.then(offer1 =>
pc.setLocalDescription(offer1)
.then(() =>
generateVideoReceiveOnlyOffer(pc)
.then(offer2 =>
pc.setLocalDescription(offer2)
.then(() => {
assert_session_desc_not_similar(offer1, offer2);
assert_equals(pc.signalingState, 'have-local-offer');
assert_session_desc_similar(pc.localDescription, offer2);
assert_session_desc_similar(pc.pendingLocalDescription, offer2);
assert_equals(pc.currentLocalDescription, null);
assert_array_equals(states, ['have-local-offer']);
}))));
}, 'Creating and setting offer multiple times should succeed');
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
pc1.addTransceiver('audio', { direction: 'recvonly' });
const offer = await pc1.createOffer(); // [[LastOffer]] set
pc2.addTransceiver('video', { direction: 'recvonly' });
const offer2 = await pc2.createOffer();
await pc1.setRemoteDescription(offer2);
await pc1.createAnswer(); // [[LastAnswer]] set
await pc1.setRemoteDescription({type: "rollback"});
await pc1.setLocalDescription(offer);
}, "Setting previously generated offer after a call to createAnswer should work");
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
pc1.addTransceiver('audio', { direction: 'recvonly' });
await pc1.setLocalDescription(await pc1.createOffer());
const offer = await pc1.createOffer();
await pc1.setLocalDescription(offer);
await pc2.setRemoteDescription(offer);
const answer = await pc2.createAnswer();
await pc2.setLocalDescription(answer);
await pc1.setRemoteDescription(answer);
assert_equals(pc1.getTransceivers().length, 1);
assert_equals(pc1.getTransceivers()[0].receiver.track.kind, "audio");
assert_equals(pc2.getTransceivers().length, 1);
assert_equals(pc2.getTransceivers()[0].receiver.track.kind, "audio");
}, "Negotiation works when there has been a repeated setLocalDescription(offer)");
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
pc.addTransceiver('audio', { direction: 'recvonly' });
const sldPromise = pc.setLocalDescription(await pc.createOffer());
assert_equals(pc.signalingState, "stable", "signalingState should not be set synchronously after a call to sLD");
assert_equals(pc.pendingLocalDescription, null, "pendingRemoteDescription should never be set due to sLD");
assert_equals(pc.pendingRemoteDescription, null, "pendingLocalDescription should not be set synchronously after a call to sLD");
assert_equals(pc.currentLocalDescription, null, "currentLocalDescription should not be set synchronously after a call to sLD");
assert_equals(pc.currentRemoteDescription, null, "currentRemoteDescription should not be set synchronously after a call to sLD");
const statePromise = new Promise(resolve => {
pc.onsignalingstatechange = () => {
resolve(pc.signalingState);
}
});
const raceValue = await Promise.race([statePromise, sldPromise]);
assert_equals(raceValue, "have-local-offer", "signalingstatechange event should fire before sLD resolves");
assert_equals(pc.pendingRemoteDescription, null, "pendingRemoteDescription should never be set due to sLD");
assert_not_equals(pc.pendingLocalDescription, null, "pendingLocalDescription should be updated before the signalingstatechange event");
assert_equals(pc.pendingLocalDescription.type, "offer");
assert_equals(pc.pendingLocalDescription.sdp, pc.localDescription.sdp);
assert_equals(pc.currentLocalDescription, null, "currentLocalDescription should never be updated due to sLD(offer)");
assert_equals(pc.currentRemoteDescription, null, "currentRemoteDescription should never be updated due to sLD(offer)");
await sldPromise;
}, "setLocalDescription(offer) should update internal state with a queued task, in the right order");
</script>
|
