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+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test whether we can create an AudioContext interface</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script src="webaudio.js" type="text/javascript"></script>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(function() {
+  var context = new AudioContext();
+  var buffer = context.createBuffer(2, 2048, context.sampleRate);
+  SpecialPowers.gc(); // Make sure that our channels are accessible after GC
+  ok(buffer, "Buffer was allocated successfully");
+  is(buffer.sampleRate, context.sampleRate, "Correct sample rate");
+  is(buffer.length, 2048, "Correct length");
+  ok(Math.abs(buffer.duration - 2048 / context.sampleRate) < 0.0001, "Correct duration");
+  is(buffer.numberOfChannels, 2, "Correct number of channels");
+  for (var i = 0; i < buffer.numberOfChannels; ++i) {
+    var buf = buffer.getChannelData(i);
+    ok(buf, "Buffer index " + i + " exists");
+    ok(buf instanceof Float32Array, "Result is a typed array");
+    is(buf.length, buffer.length, "Correct length");
+    var foundNonZero = false;
+    for (var j = 0; j < buf.length; ++j) {
+      if (buf[j] != 0) {
+        foundNonZero = true;
+        break;
+      }
+      buf[j] = j;
+    }
+    ok(!foundNonZero, "Buffer " + i + " should be initialized to 0");
+  }
+
+  // Now test copying the channel data out of a normal buffer
+  var copy = new Float32Array(100);
+  buffer.copyFromChannel(copy, 0, 1024);
+  for (var i = 0; i < copy.length; ++i) {
+    is(copy[i], 1024 + i, "Correct sample");
+  }
+  // Test copying the channel data out of a playing buffer
+  var srcNode = context.createBufferSource();
+  srcNode.buffer = buffer;
+  srcNode.start(0);
+  copy = new Float32Array(100);
+  buffer.copyFromChannel(copy, 0, 1024);
+  for (var i = 0; i < copy.length; ++i) {
+    is(copy[i], 1024 + i, "Correct sample");
+  }
+
+  // Test copying to the channel data
+  var newData = new Float32Array(200);
+  buffer.copyToChannel(newData, 0, 100);
+  var changedData = buffer.getChannelData(0);
+  for (var i = 0; i < changedData.length; ++i) {
+    if (i < 100 || i >= 300) {
+      is(changedData[i], i, "Untouched sample");
+    } else {
+      is(changedData[i], 0, "Correct sample");
+    }
+  }
+
+  // Now, detach the array buffer
+  var worker = new Worker("audioBufferSourceNodeDetached_worker.js");
+  var data = buffer.getChannelData(0).buffer;
+  worker.postMessage(data, [data]);
+  SpecialPowers.gc();
+
+  expectNoException(function() {
+    buffer.copyFromChannel(copy, 0, 1024);
+  });
+
+  expectNoException(function() {
+    buffer.copyToChannel(newData, 0, 100);
+  });
+
+  expectException(function() {
+    context.createBuffer(2, 2048, 7999);
+  }, DOMException.NOT_SUPPORTED_ERR);
+  expectException(function() {
+    context.createBuffer(2, 2048, 192001);
+  }, DOMException.NOT_SUPPORTED_ERR);
+  context.createBuffer(2, 2048, 8000);  // no exception
+  context.createBuffer(2, 2048, 192000); // no exception
+  context.createBuffer(32, 2048, 48000); // no exception
+  // Null length
+  expectException(function() {
+    context.createBuffer(2, 0, 48000);
+  }, DOMException.NOT_SUPPORTED_ERR);
+  // Null number of channels
+  expectException(function() {
+    context.createBuffer(0, 2048, 48000);
+  }, DOMException.NOT_SUPPORTED_ERR);
+  SimpleTest.finish();
+});
+
+</script>
+</pre>
+</body>
+</html>