1 files changed, 22 insertions, 0 deletions
diff --git a/testing/web-platform/tests/idle-detection/resources/idle-detection-disabled-by-permissions-policy-worker.js b/testing/web-platform/tests/idle-detection/resources/idle-detection-disabled-by-permissions-policy-worker.js
new file mode 100644
index 0000000000..c30f7c188e
--- /dev/null
+++ b/testing/web-platform/tests/idle-detection/resources/idle-detection-disabled-by-permissions-policy-worker.js
@@ -0,0 +1,22 @@
+'use strict';
+
+importScripts('/resources/testharness.js');
+
+const header = 'Permissions-Policy header idle-detection=()';
+let workerType;
+
+if (typeof postMessage === 'function') {
+  workerType = 'dedicated';
+}
+
+promise_test(async () => {
+  try {
+    await new IdleDetector().start();
+    assert_unreached('expected start() to throw with SecurityError');
+  } catch (error) {
+    assert_equals(error.name, 'SecurityError');
+  }
+},
+`Inherited ${header} disallows ${workerType} workers.`);
+
+done();