1 files changed, 67 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-channelmergernode-interface/audiochannelmerger-basic.html b/testing/web-platform/tests/webaudio/the-audio-api/the-channelmergernode-interface/audiochannelmerger-basic.html
new file mode 100644
index 0000000000..71a62f176f
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-channelmergernode-interface/audiochannelmerger-basic.html
@@ -0,0 +1,67 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      audiochannelmerger-basic.html
+    </title>
+    <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 id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+
+      // Task: Checking constraints in ChannelMergerNode.
+      audit.define('exceptions-channels', (task, should) => {
+        let context = new OfflineAudioContext(2, 128, 44100);
+        let merger;
+
+        should(function() {
+          merger = context.createChannelMerger();
+        }, 'context.createChannelMerger()').notThrow();
+
+        should(function() {
+          merger = context.createChannelMerger(0);
+        }, 'context.createChannelMerger(0)').throw(DOMException, 'IndexSizeError');
+
+        should(function() {
+          merger = context.createChannelMerger(32);
+        }, 'context.createChannelMerger(32)').notThrow();
+
+        // Can't create a channel merger with 33 channels because the audio
+        // context has a 32-channel-limit in Chrome.
+        should(function() {
+          merger = context.createChannelMerger(33);
+        }, 'context.createChannelMerger(33)').throw(DOMException, 'IndexSizeError');
+
+        task.done();
+      });
+
+      // Task: checking the channel-related properties have the correct value
+      // and can't be changed.
+      audit.define('exceptions-properties', (task, should) => {
+        let context = new OfflineAudioContext(2, 128, 44100);
+        let merger = context.createChannelMerger();
+
+        should(merger.channelCount, 'merger.channelCount').beEqualTo(1);
+
+        should(function() {
+          merger.channelCount = 3;
+        }, 'merger.channelCount = 3').throw(DOMException, 'InvalidStateError');
+
+        should(merger.channelCountMode, 'merger.channelCountMode')
+            .beEqualTo('explicit');
+
+        should(function() {
+          merger.channelCountMode = 'max';
+        }, 'merger.channelCountMode = "max"').throw(DOMException, 'InvalidStateError');
+
+        task.done();
+      });
+
+      audit.run();
+    </script>
+  </body>
+</html>