Core: Test all factory use cases from intro.js

There is a lot of logic in intro.js; now we test four cases:
1. (implicitly, via QUnit tests) A real browser with window being the global
2. Browserify where there are both global & window variables.
3. Node with jsdom where window is passed manually to the jQuery factory.
4. Pure Node with incorrect window passed; jQuery should throw then.

Previously the second & fourth case was not tested and the third was tested
in a way that interfered with the main test environment.

We now also test if in the Browserify case we're not creating a jQuery global
by default.

Fixes gh-2181
Closes gh-2234

1 files changed, 22 insertions, 0 deletions

diff --git a/test/promises_aplus_adapter.js b/test/promises_aplus_adapter.js
new file mode 100644
index 000000000..decc3e0f0
--- /dev/null
+++ b/test/promises_aplus_adapter.js
@@ -0,0 +1,22 @@
+/* jshint node: true */
+
+"use strict";
+
+require( "jsdom" ).env( "", function ( errors, window ) {
+	if ( errors ) {
+		console.error( errors );
+		return;
+	}
+
+	var jQuery = require( ".." )( window );
+
+	exports.deferred = function () {
+		var deferred = jQuery.Deferred();
+
+		return {
+			promise: deferred.promise(),
+			resolve: deferred.resolve.bind( deferred ),
+			reject: deferred.reject.bind( deferred )
+		};
+	};
+} );