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169 lines
6.1 KiB
HTML
169 lines
6.1 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>RTCDataChannel.prototype.bufferedAmount</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="RTCPeerConnection-helper.js"></script>
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<script>
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'use strict';
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// Test is based on the following editor draft:
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// https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.html
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// The following helper functions are called from RTCPeerConnection-helper.js:
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// createDataChannelPair
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// awaitMessage
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// blobToArrayBuffer
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// assert_equals_array_buffer
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/*
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6.2. RTCDataChannel
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interface RTCDataChannel : EventTarget {
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...
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readonly attribute unsigned long bufferedAmount;
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void send(USVString data);
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void send(Blob data);
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void send(ArrayBuffer data);
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void send(ArrayBufferView data);
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};
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bufferedAmount
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The bufferedAmount attribute must return the number of bytes of application
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data (UTF-8 text and binary data) that have been queued using send() but that,
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as of the last time the event loop started executing a task, had not yet been
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transmitted to the network. (This thus includes any text sent during the
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execution of the current task, regardless of whether the user agent is able
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to transmit text asynchronously with script execution.) This does not include
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framing overhead incurred by the protocol, or buffering done by the operating
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system or network hardware. If the channel is closed, this attribute's value
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will only increase with each call to the send() method (the attribute does not
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reset to zero once the channel closes).
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[WebMessaging]
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interface MessageEvent : Event {
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readonly attribute any data;
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...
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};
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*/
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// Simple ASCII encoded string
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const helloString = 'hello';
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// ASCII encoded buffer representation of the string
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const helloBuffer = Uint8Array.of(0x68, 0x65, 0x6c, 0x6c, 0x6f);
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const helloBlob = new Blob([helloBuffer]);
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// Unicode string with multiple code units
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const unicodeString = '世界你好';
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// UTF-8 encoded buffer representation of the string
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const unicodeBuffer = Uint8Array.of(
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0xe4, 0xb8, 0x96, 0xe7, 0x95, 0x8c,
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0xe4, 0xbd, 0xa0, 0xe5, 0xa5, 0xbd);
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/*
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6.2. send()
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3. Execute the sub step that corresponds to the type of the methods argument:
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string object
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Let data be the object and increase the bufferedAmount attribute
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by the number of bytes needed to express data as UTF-8.
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*/
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promise_test(t => {
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return createDataChannelPair()
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.then(([channel1, channel2]) => {
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channel1.send(unicodeString);
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assert_equals(channel1.bufferedAmount, unicodeBuffer.byteLength,
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'Expect bufferedAmount to be the byte length of the unicode string');
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return awaitMessage(channel2)
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.then(message => {
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assert_equals(channel1.bufferedAmount, 0,
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'Expect sender bufferedAmount to be reduced after message is sent');
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});
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});
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}, 'bufferedAmount should increase to byte length of encoded unicode string sent');
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/*
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6.2. send()
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3. Execute the sub step that corresponds to the type of the methods argument:
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ArrayBuffer object
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Let data be the data stored in the buffer described by the ArrayBuffer
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object and increase the bufferedAmount attribute by the length of the
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ArrayBuffer in bytes.
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*/
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promise_test(t => {
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return createDataChannelPair()
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.then(([channel1, channel2]) => {
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channel1.send(helloBuffer.buffer);
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assert_equals(channel1.bufferedAmount, helloBuffer.byteLength,
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'Expect bufferedAmount to increase to byte length of sent buffer');
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return awaitMessage(channel2)
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.then(messageBuffer => {
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assert_equals(channel1.bufferedAmount, 0,
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'Expect sender bufferedAmount to be reduced after message is sent');
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});
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});
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}, 'bufferedAmount should increase to byte length of buffer sent');
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/*
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6.2. send()
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3. Execute the sub step that corresponds to the type of the methods argument:
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Blob object
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Let data be the raw data represented by the Blob object and increase
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the bufferedAmount attribute by the size of data, in bytes.
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*/
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promise_test(t => {
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return createDataChannelPair()
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.then(([channel1, channel2]) => {
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channel1.send(helloBlob);
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assert_equals(channel1.bufferedAmount, helloBlob.size,
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'Expect bufferedAmount to increase to size of sent blob');
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return awaitMessage(channel2)
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.then(messageBuffer => {
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assert_equals(channel1.bufferedAmount, 0,
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'Expect sender bufferedAmount to be reduced after message is sent');
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});
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});
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}, 'bufferedAmount should increase to size of blob sent');
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// Test sending 3 messages: helloBuffer, unicodeString, helloBlob
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async_test(t => {
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let messageCount = 0;
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createDataChannelPair()
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.then(([channel1, channel2]) => {
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const onMessage = t.step_func(event => {
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const { data } = event;
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messageCount++;
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if(messageCount === 3) {
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assert_equals(channel1.bufferedAmount, 0,
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'Expect sender bufferedAmount to be reduced after message is sent');
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t.done();
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}
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});
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channel2.addEventListener('message', onMessage);
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channel1.send(helloBuffer);
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assert_equals(channel1.bufferedAmount, helloString.length,
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'Expect bufferedAmount to be the total length of all messages queued to send');
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channel1.send(unicodeString);
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assert_equals(channel1.bufferedAmount,
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helloString.length + unicodeBuffer.byteLength,
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'Expect bufferedAmount to be the total length of all messages queued to send');
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channel1.send(helloBlob);
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assert_equals(channel1.bufferedAmount,
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helloString.length*2 + unicodeBuffer.byteLength,
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'Expect bufferedAmount to be the total length of all messages queued to send');
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}).catch(t.step_func(err =>
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assert_unreached(`Unexpected promise rejection: ${err}`)));
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}, 'bufferedAmount should increase by byte length for each message sent');
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</script>
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