1 files changed, 34 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/timers/missing-timeout-setinterval.any.js b/testing/web-platform/tests/html/webappapis/timers/missing-timeout-setinterval.any.js
new file mode 100644
index 0000000000..33a1cc073c
--- /dev/null
+++ b/testing/web-platform/tests/html/webappapis/timers/missing-timeout-setinterval.any.js
@@ -0,0 +1,34 @@
+function timeout_trampoline(t, timeout, message) {
+  t.step_timeout(function() {
+    // Yield in case we managed to be called before the second interval callback.
+    t.step_timeout(function() {
+      assert_unreached(message);
+    }, timeout);
+  }, timeout);
+}
+
+async_test(function(t) {
+  let ctr = 0;
+  let h = setInterval(t.step_func(function() {
+    if (++ctr == 2) {
+      clearInterval(h);
+      t.done();
+      return;
+    }
+  }) /* no interval */);
+
+  timeout_trampoline(t, 100, "Expected setInterval callback to be called two times");
+}, "Calling setInterval with no interval should be the same as if called with 0 interval");
+
+async_test(function(t) {
+  let ctr = 0;
+  let h = setInterval(t.step_func(function() {
+    if (++ctr == 2) {
+      clearInterval(h);
+      t.done();
+      return;
+    }
+  }),  undefined);
+
+  timeout_trampoline(t, 100, "Expected setInterval callback to be called two times");
+}, "Calling setInterval with undefined interval should be the same as if called with 0 interval");