Index: test/push.test.js
===================================================================
--- test/push.test.js	(revision ad107154f7df0224781cab7686f02aa6148d5a9e)
+++ test/push.test.js	(revision 96c714f68f23cf079e786ef6c33248d540533ab2)
@@ -65,4 +65,14 @@
 });
 
+test('burst throttle: one ping per window per (user,type); test type never throttles', () => {
+  assert.equal(Push.throttled('tu1', 'like', 1000), false);   // first passes
+  assert.equal(Push.throttled('tu1', 'like', 1100), true);    // within 300s window
+  assert.equal(Push.throttled('tu1', 'like', 1301), false);   // window elapsed
+  assert.equal(Push.throttled('tu1', 'boost', 1000), false);  // other type independent
+  assert.equal(Push.throttled('tu2', 'like', 1000), false);   // other user independent
+  assert.equal(Push.throttled('tu1', 'test', 1000), false);   // test bypasses
+  assert.equal(Push.throttled('tu1', 'test', 1001), false);
+});
+
 test('incomplete subscription payloads are refused', () => {
   assert.equal(Push.saveSubscription({ endpoint: '', userId: 'u1', p256dh: 'x', auth: 'y' }), false);