1 files changed, 37 insertions, 0 deletions
diff --git a/testing/web-platform/tests/performance-timeline/po-disconnect.any.js b/testing/web-platform/tests/performance-timeline/po-disconnect.any.js
new file mode 100644
index 0000000000..5f5fb5aa43
--- /dev/null
+++ b/testing/web-platform/tests/performance-timeline/po-disconnect.any.js
@@ -0,0 +1,37 @@
+// META: script=performanceobservers.js
+
+  async_test(function (t) {
+    var observer = new PerformanceObserver(
+        t.step_func(function (entryList, obs) {
+          assert_unreached("This callback must not be invoked");
+        })
+      );
+    observer.observe({entryTypes: ["mark", "measure", "navigation"]});
+    observer.disconnect();
+    self.performance.mark("mark1");
+    self.performance.measure("measure1");
+    t.step_timeout(function () {
+      t.done();
+    }, 2000);
+  }, "disconnected callbacks must not be invoked");
+
+  test(function () {
+    var obs = new PerformanceObserver(function () { return true; });
+    obs.disconnect();
+    obs.disconnect();
+  }, "disconnecting an unconnected observer is a no-op");
+
+  async_test(function (t) {
+    var observer = new PerformanceObserver(
+        t.step_func(function (entryList, obs) {
+          assert_unreached("This callback must not be invoked");
+        })
+      );
+    observer.observe({entryTypes: ["mark"]});
+    self.performance.mark("mark1");
+    observer.disconnect();
+    self.performance.mark("mark2");
+    t.step_timeout(function () {
+      t.done();
+    }, 2000);
+  }, "An observer disconnected after a mark must not have its callback invoked");