1 files changed, 76 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/cors-check.https.html b/testing/web-platform/tests/webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/cors-check.https.html
new file mode 100644
index 0000000000..38bd94a037
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/cors-check.https.html
@@ -0,0 +1,76 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Test if MediaElementAudioSourceNode works for cross-origin redirects with
+      "cors" request mode.
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/webaudio/resources/audit.js"></script>
+    <script src="/common/get-host-info.sub.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      const audit = Audit.createTaskRunner();
+
+      setup(() => {
+        const context = new AudioContext();
+        context.suspend();
+
+        const host_info = get_host_info();
+        const audioElement = document.createElement('audio');
+        audioElement.loop = true;
+        audioElement.crossOrigin = 'anonymous';
+        const wav =
+            host_info.HTTPS_ORIGIN + '/webaudio/resources/4ch-440.wav?' +
+            'pipe=header(access-control-allow-origin,*)';
+        audioElement.src =
+            host_info.HTTPS_REMOTE_ORIGIN +
+            '/fetch/api/resources/redirect.py?location=' +
+            encodeURIComponent(wav);
+        let source;
+        let workletRecorder;
+
+        audit.define(
+            {label: 'setting-up-graph'},
+            (task, should) => {
+              source = new MediaElementAudioSourceNode(context, {
+                mediaElement: audioElement
+              });
+              workletRecorder = new AudioWorkletNode(
+                  context, 'recorder-processor', {channelCount: 4});
+              source.connect(workletRecorder).connect(context.destination);
+              task.done();
+            });
+
+        // The recorded data from MESN must be non-zero. The source file contains
+        // 4 channels of sine wave.
+        audit.define(
+            {label: 'start-playback-and-capture'},
+            (task, should) => {
+              workletRecorder.port.onmessage = (event) => {
+                if (event.data.type === 'recordfinished') {
+                  for (let i = 0; i < event.data.recordBuffer.length; ++i) {
+                    const channelData = event.data.recordBuffer[i];
+                    should(channelData, `Recorded channel #${i}`)
+                        .notBeConstantValueOf(0);
+                  }
+                }
+
+                task.done();
+              };
+
+              context.resume();
+              audioElement.play();
+            });
+
+        Promise.all([
+          context.audioWorklet.addModule('/webaudio/js/worklet-recorder.js')
+        ]).then(() => {
+          audit.run();
+        });
+      });
+    </script>
+  </body>
+</html>