1 files changed, 24 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/resources/merger-testing.js b/testing/web-platform/tests/webaudio/resources/merger-testing.js
new file mode 100644
index 0000000000..4477ec0a1f
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/resources/merger-testing.js
@@ -0,0 +1,24 @@
+// This file is for the audiochannelmerger-* layout tests.
+// Requires |audio-testing.js| to work properly.
+
+function testMergerInput(should, config) {
+  let context = new OfflineAudioContext(config.numberOfChannels, 128, 44100);
+  let merger = context.createChannelMerger(config.numberOfChannels);
+  let source = context.createBufferSource();
+  source.buffer = createConstantBuffer(context, 128, config.testBufferContent);
+
+  // Connect the output of source into the specified input of merger.
+  if (config.mergerInputIndex)
+    source.connect(merger, 0, config.mergerInputIndex);
+  else
+    source.connect(merger);
+  merger.connect(context.destination);
+  source.start();
+
+  return context.startRendering().then(function(buffer) {
+    let prefix = config.testBufferContent.length + '-channel source: ';
+    for (let i = 0; i < config.numberOfChannels; i++)
+      should(buffer.getChannelData(i), prefix + 'Channel #' + i)
+          .beConstantValueOf(config.expected[i]);
+  });
+}