more explicit tests for debouncer wait and no-wait behavior

test/unit/utils.html

@@ -85,10 +85,15 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       };
 
       window.el1.debounce('foo', cb);
+      window.el1.debounce('foo', cb, 50);
       window.el1.debounce('foo', cb, 100);
 
       setTimeout(function() {
-        assert.equal(called, 1, 'debounce should be called exactly once');
+        assert.equal(called, 0, 'callback is not called yet');
+      }, 50);
+
+      setTimeout(function() {
+        assert.equal(called, 1, 'callback was called exactly once');
         done();
       }, 200);
 
@@ -140,7 +145,7 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
 
     });
 
-    test('duplicate debouncer assignment', function(done) {
+    test('duplicate debouncer assignment (no-wait)', function(done) {
 
       var a, b;
 
@@ -155,7 +160,26 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
         assert.equal(a, undefined, 'first debouncer was never fired');
         assert.equal(b, 'bar', 'only the second debouncer callback was executed');
         done();
-      }, 100);
+      });
+
+    });
+
+    test('duplicate debouncer assignment (wait)', function(done) {
+
+      var a, b, delay = 50;
+
+      window.el1.debounce('foo', function() {
+        a = 'foo';
+      }, delay);
+      window.el1.debounce('foo', function() {
+        b = 'bar';
+      }, delay);
+
+      setTimeout(function() {
+        assert.equal(a, undefined, 'first debouncer was never fired');
+        assert.equal(b, 'bar', 'only the second debouncer callback was executed');
+        done();
+      }, (delay+50));
 
     });