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diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-constantsourcenode-interface/test-constantsourcenode.html b/testing/web-platform/tests/webaudio/the-audio-api/the-constantsourcenode-interface/test-constantsourcenode.html
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--- a/testing/web-platform/tests/webaudio/the-audio-api/the-constantsourcenode-interface/test-constantsourcenode.html
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-<!doctype html>
-<meta charset=utf-8>
-<title>Test the ConstantSourceNode Interface</title>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<script>
-test(function(t) {
- var ac = new AudioContext();
-
- var csn = ac.createConstantSource();
- assert_true(csn.offset.value == 1.0, "Default offset is 1.0");
-
- csn = new ConstantSourceNode(ac);
- assert_true(csn.offset.value == 1.0, "Default offset is 1.0");
-
- csn = new ConstantSourceNode(ac, {offset: -0.25});
- assert_true(csn.offset.value == -0.25, "Offset can be set during construction");
-}, "ConstantSourceNode can be constructed");
-
-test(function(t) {
- var ac = new AudioContext();
-
- var csn = ac.createConstantSource();
-
- assert_throws("InvalidStateError", function() {
- csn.stop(1);
- }, "Start must be called before stop");
-
- assert_throws("NotSupportedError", function() {
- csn.start(-1);
- }, "When can not be negative");
-
- csn.start(0);
- assert_throws("NotSupportedError", function() {
- csn.stop(-1);
- }, "When can not be negative");
-}, "ConstantSourceNode stop and start");
-
-async_test(function(t) {
- var ac = new OfflineAudioContext(1, 2048, 44100);
- var csn = ac.createConstantSource();
- csn.connect(ac.destination);
- csn.start()
- csn.stop(1024/44100)
- csn.onended = function(e) {
- t.step(function() {
- assert_true(e.type == "ended", "Event type should be 'ended', received: " + e.type);
- });
- t.done();
- }
- ac.startRendering();
-}, "ConstantSourceNode onended event");
-
-async_test(function(t) {
- var ac = new OfflineAudioContext(1, 2048, 44100);
- var csn = ac.createConstantSource();
- csn.connect(ac.destination);
- csn.start(512/44100)
- csn.stop(1024/44100)
-
- ac.oncomplete = function(e) {
- t.step(function() {
- var result = e.renderedBuffer.getChannelData(0);
- for (var i = 0; i < 2048; ++i) {
- if (i >= 512 && i < 1024) {
- assert_true(result[i] == 1.0, "sample " + i + " should equal 1.0");
- } else {
- assert_true(result[i] == 0.0, "sample " + i + " should equal 0.0");
- }
- }
- });
- t.done();
- }
-
- ac.startRendering();
-}, "ConstantSourceNode start and stop when work");
-
-async_test(function(t) {
- var ac = new OfflineAudioContext(1, 2048, 44100);
- var csn = ac.createConstantSource();
- csn.offset.value = 0.25;
- csn.connect(ac.destination);
- csn.start()
-
- ac.oncomplete = function(e) {
- t.step(function() {
- var result = e.renderedBuffer.getChannelData(0);
- for (var i = 0; i < 2048; ++i) {
- assert_true(result[i] == 0.25, "sample " + i + " should equal 0.25");
- }
- });
- t.done();
- }
-
- ac.startRendering();
-}, "ConstantSourceNode with no automation");
-
-async_test(function(t) {
- var ac = new OfflineAudioContext(1, 2048, 44100);
-
- var timeConstant = 2.0;
- var offsetStart = 0.25;
- var offsetEnd = 0.1;
-
- var csn = ac.createConstantSource();
- csn.offset.value = offsetStart;
- csn.offset.setTargetAtTime(offsetEnd, 1024/ac.sampleRate, timeConstant);
- csn.connect(ac.destination);
- csn.start()
-
- ac.oncomplete = function(e) {
- t.step(function() {
- // create buffer with expected values
- var buffer = ac.createBuffer(1, 2048, ac.sampleRate);
- for (var i = 0; i < 2048; ++i) {
- if (i < 1024) {
- buffer.getChannelData(0)[i] = offsetStart;
- } else {
- time = (i-1024)/ac.sampleRate;
- buffer.getChannelData(0)[i] = offsetEnd + (offsetStart - offsetEnd)*Math.exp(-time/timeConstant);
- }
- }
-
- var result = e.renderedBuffer.getChannelData(0);
- var expected = buffer.getChannelData(0);
- for (var i = 0; i < 2048; ++i) {
- assert_true(Math.abs(result[i] - expected[i]) < 1e-6, "sample " + i + " should equal " + expected[i]);
- }
- });
- t.done();
- }
-
- ac.startRendering();
-}, "ConstantSourceNode with automation");
-</script>