1 files changed, 63 insertions, 0 deletions
diff --git a/testing/web-platform/tests/performance-timeline/po-observe.any.js b/testing/web-platform/tests/performance-timeline/po-observe.any.js
new file mode 100644
index 0000000000..5b593374ba
--- /dev/null
+++ b/testing/web-platform/tests/performance-timeline/po-observe.any.js
@@ -0,0 +1,63 @@
+// META: script=performanceobservers.js
+
+  test(function () {
+    const obs = new PerformanceObserver(() => {});
+    assert_throws_js(TypeError, function () {
+      obs.observe({entryTypes: "mark"});
+    });
+  }, "entryTypes must be a sequence or throw a TypeError");
+
+  test(function () {
+    const obs = new PerformanceObserver(() => {});
+    obs.observe({entryTypes: []});
+  }, "Empty sequence entryTypes does not throw an exception.");
+
+  test(function () {
+    const obs = new PerformanceObserver(() => {});
+    obs.observe({entryTypes: ["this-cannot-match-an-entryType"]});
+    obs.observe({entryTypes: ["marks","navigate", "resources"]});
+  }, "Unknown entryTypes do not throw an exception.");
+
+  test(function () {
+    const obs = new PerformanceObserver(() => {});
+    obs.observe({entryTypes: ["mark","this-cannot-match-an-entryType"]});
+    obs.observe({entryTypes: ["this-cannot-match-an-entryType","mark"]});
+    obs.observe({entryTypes: ["mark"], others: true});
+  }, "Filter unsupported entryType entryType names within the entryTypes sequence");
+
+  async_test(function (t) {
+    var finish = t.step_func(function () { t.done(); });
+    var observer = new PerformanceObserver(
+      function (entryList, obs) {
+        var self = this;
+        t.step(function () {
+          assert_true(entryList instanceof PerformanceObserverEntryList, "first callback parameter must be a PerformanceObserverEntryList instance");
+          assert_true(obs instanceof PerformanceObserver, "second callback parameter must be a PerformanceObserver instance");
+          assert_equals(observer, self, "observer is the this value");
+          assert_equals(observer, obs, "observer is second parameter");
+          assert_equals(self, obs, "this and second parameter are the same");
+          observer.disconnect();
+          finish();
+        });
+      }
+    );
+    self.performance.clearMarks();
+    observer.observe({entryTypes: ["mark"]});
+    self.performance.mark("mark1");
+  }, "Check observer callback parameter and this values");
+
+  async_test(function (t) {
+  var observer = new PerformanceObserver(
+      t.step_func(function (entryList, obs) {
+        checkEntries(entryList.getEntries(),
+          [{ entryType: "measure", name: "measure1"}]);
+        observer.disconnect();
+        t.done();
+      })
+    );
+    self.performance.clearMarks();
+    observer.observe({entryTypes: ["mark"]});
+    observer.observe({entryTypes: ["measure"]});
+    self.performance.mark("mark1");
+    self.performance.measure("measure1");
+  }, "replace observer if already present");