1 files changed, 37 insertions, 0 deletions
diff --git a/testing/web-platform/tests/user-timing/supported-usertiming-types.any.js b/testing/web-platform/tests/user-timing/supported-usertiming-types.any.js
new file mode 100644
index 0000000000..ea3b2fe9dc
--- /dev/null
+++ b/testing/web-platform/tests/user-timing/supported-usertiming-types.any.js
@@ -0,0 +1,37 @@
+test(() => {
+  if (typeof PerformanceObserver.supportedEntryTypes === "undefined")
+    assert_unreached("supportedEntryTypes is not supported.");
+  const types = PerformanceObserver.supportedEntryTypes;
+  assert_true(types.includes("mark"),
+    "There should be 'mark' in PerformanceObserver.supportedEntryTypes");
+  assert_true(types.includes("measure"),
+    "There should be 'measure' in PerformanceObserver.supportedEntryTypes");
+  assert_greater_than(types.indexOf("measure"), types.indexOf('mark'),
+    "The 'measure' entry should appear after the 'mark' entry");
+}, "supportedEntryTypes contains 'mark' and 'measure'.");
+
+if (typeof PerformanceObserver.supportedEntryTypes !== "undefined") {
+  const entryTypes = {
+    "mark": () => {
+      performance.mark('foo');
+    },
+    "measure": () => {
+      performance.measure('bar');
+    }
+  }
+  for (let entryType in entryTypes) {
+    if (PerformanceObserver.supportedEntryTypes.includes(entryType)) {
+      promise_test(async() => {
+        await new Promise((resolve) => {
+          new PerformanceObserver(function (list, observer) {
+            observer.disconnect();
+            resolve();
+          }).observe({entryTypes: [entryType]});
+
+          // Force the PerformanceEntry.
+          entryTypes[entryType]();
+        })
+      }, `'${entryType}' entries should be observable.`)
+    }
+  }
+}