Tests: Ensure no timers are running at the end of each test (#1920)

This helps fix issues that make tooltip tests sometimes fail when run against
jQuery 3.2 or newer due to timing differences.

Details:
* Add the `moduleAfterEach` function ensuring no timers are running.
* Attach this function via `common.testWidget`.
* Attach this function to most test suites.
* Add a tooltip test helper cleaning up leftover timers.
* Rename legacy `setup`/`teardown` hooks to `beforeEach`/`afterEach`.

Closes gh-1920

1 files changed, 31 insertions, 0 deletions

diff --git a/tests/unit/tooltip/helper.js b/tests/unit/tooltip/helper.js
new file mode 100644
index 000000000..01d4c03ac
--- /dev/null
+++ b/tests/unit/tooltip/helper.js
@@ -0,0 +1,31 @@
+define( [
+	"qunit",
+	"jquery",
+	"lib/helper",
+	"ui/widgets/tooltip"
+], function( QUnit, $, helper ) {
+
+	return $.extend( helper, {
+		beforeAfterEach: function() {
+			return {
+				afterEach: function() {
+					var index, timer,
+						timers = jQuery.timers;
+
+					jQuery.fx.stop();
+					var x = false;
+
+					for ( index = timers.length; index--; ) {
+						x = true;
+						timer = timers[ index ];
+						timer.anim.stop();
+						timers.splice( index, 1 );
+					}
+
+					return helper.moduleAfterEach.apply( this, arguments );
+				}
+			};
+		}
+	} );
+
+} );