prototype: Stop form observers in unit tests. Closes #10938.

CHANGELOG

@@ -1,3 +1,5 @@
+* Stop form observers in unit tests. Closes #10938. [kangax]
+
 * Performance improvements for Enumerables. Closes #11264. [Ben, Samuel Lebeau]
 
 * deprecation extension: mark Hash.toJSON() as removed. [Tobie Langel]

test/unit/form.html

@@ -191,6 +191,7 @@
           assertEqual(1, timedCounter);
           wait(550, function() {
             assertEqual(1, timedCounter);
+            observer.stop();
           });
         });
       });
@@ -219,6 +220,7 @@
           assertEqual(1, timedCounter);
           wait(550, function() {
             assertEqual(1, timedCounter);
+            observer.stop();
           });
         });
       });
@@ -244,6 +246,7 @@
           assertEqual(1, timedCounter);
           wait(550, function() {
             assertEqual(1, timedCounter);
+            observer.stop();
           });
         });
       });