Tests: Exclude tests based on compilation flags, not API presence

Introduces a new test API, `includesModule`. The method returns whether
a particular module like "ajax" or "deprecated" is included in the current
jQuery build; it handles the slim build as well. The util was created so that
we don't treat presence of particular APIs to decide whether to run a test as
then if we accidentally remove an API, the tests would still not fail.

Fixes gh-5069
Closes gh-5046

1 files changed, 1 insertions, 1 deletions

diff --git a/test/unit/wrap.js b/test/unit/wrap.js
index 1f920129e..24136ac0e 100644
--- a/test/unit/wrap.js
+++ b/test/unit/wrap.js
@@ -1,6 +1,6 @@
 ( function() {
 
-if ( !jQuery.fn.wrap ) { // no wrap module
+if ( !includesModule( "wrap" ) ) {
 	return;
 }