Regression spec added for timeout timer in an async spec

The spec ensures that the timeout timer is properly cleared out
even when the async spec throws an exception.

spec/core/SpecSpec.js

@@ -218,6 +218,44 @@ describe("Spec", function() {
     expect(specNameSpy.calls.mostRecent().args[0].id).toEqual(spec.id);
   });
 
+  it("resets the timeout timer when an async spec throws an exception", function(done) {
+    var handleException = jasmine.createSpy('exception handler'),
+      spec = new j$.Spec({
+        fn: function(done) { throw new Error('test'); },
+        catchExceptions: function() { return true; },
+        expectationResultFactory: handleException,
+        timer: {
+          // Force timeout to 0 to postpone execution to next tick
+          // without using the default 5s interval
+          setTimeout: function (fn) { return setTimeout(fn, 0); },
+          clearTimeout: clearTimeout
+        },
+        queueRunner: function (attrs) {
+          // Fake the "run" method of a regular queue runner
+          // for an async spec.
+          try {
+            attrs.fns[0].call({}, function () {});
+          } catch (e) {
+            handleException(e);
+          }
+        }
+      });
+
+    // Spec execution will create the timeout timer that would report
+    // a failure on next tick unless it gets properly cleared before
+    // the end of this tick.
+    spec.execute();
+
+    // Run the expect clause on next tick to detect the case when the
+    // timeout timer was not properly reset. The exception handler is
+    // called once when the error is thrown. It is called twice when
+    // the timeout timer is not properly reset.
+    setTimeout(function () {
+      expect(handleException.calls.count()).toEqual(1);
+      done();
+    }, 0);
+  });
+
   describe("when a spec is marked pending during execution", function() {
     it("should mark the spec as pending", function() {
       var fakeQueueRunner = function(opts) {