web-platform-tests
diff --git a/‎webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-null.html‎
Lines changed: 11 additions & 24 deletions b/‎webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-null.html‎
Lines changed: 11 additions & 24 deletions
@@ -7,14 +7,11 @@
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/webaudio/resources/audit-util.js"></script>
-    <script src="/webaudio/resources/audit.js"></script>
   </head>
 
   <body>
     <script>
-      const audit = Audit.createTaskRunner();
-
-      audit.define('ABSN with null buffer', (task, should) => {
+      promise_test(async () => {
         // Create test context.  Length and sampleRate are pretty arbitrary, but
         // we don't need either to be very large.
         const context = new OfflineAudioContext(
@@ -28,32 +25,22 @@
 
         audioBuffer.getChannelData(0).fill(1);
 
-        // These two tests are mostly for the informational messages to show
-        // what's happening.  They should never fail!
-        should(() => {
-          audioBufferSourceNode.buffer = audioBuffer;
-        }, 'Setting ABSN.buffer to AudioBuffer').notThrow();
+        audioBufferSourceNode.buffer = audioBuffer;
 
         // This is the important part.  Setting the buffer to null after setting
         // it to something else should cause the source to produce silence.
-        should(() => {
-          audioBufferSourceNode.buffer = null;
-        }, 'Setting ABSN.buffer = null').notThrow();
+        audioBufferSourceNode.buffer = null;
 
-        audioBufferSourceNode.start(0);
+        audioBufferSourceNode.start();
         audioBufferSourceNode.connect(context.destination);
 
-        context.startRendering()
-            .then(buffer => {
-              // Since the buffer is null, the output of the source should be
-              // silence.
-              should(buffer.getChannelData(0), 'ABSN output')
-                  .beConstantValueOf(0);
-            })
-            .then(() => task.done());
-      });
-
-      audit.run();
+        const renderedBuffer = await context.startRendering();
+
+        // Since the buffer is null, the output of the source should be
+        // silence.
+        const actual = renderedBuffer.getChannelData(0);
+        assert_constant_value(actual, 0, 'ABSN output');
+      }, 'ABSN with null buffer');
     </script>
   </body>
 </html>