2 files changed, 53 insertions, 0 deletions
diff --git a/tests/unit/controlgroup/controlgroup.html b/tests/unit/controlgroup/controlgroup.html
index d90bf607c..db1d47808 100644
--- a/tests/unit/controlgroup/controlgroup.html
+++ b/tests/unit/controlgroup/controlgroup.html
@@ -68,6 +68,22 @@
 	<div class="controlgroup-single-button">
 		<button class="single-button">button</button>
 	</div>
+	<div class="controlgroup-class-key-init">
+		<select id="class-key-init-child">
+			<option>Option 1</option>
+			<option>Option 2</option>
+		</select>
+	</div>
+	<div class="controlgroup-class-key-dupe">
+		<select id="class-key-dupe-first">
+			<option>Option 1</option>
+			<option>Option 2</option>
+		</select>
+		<select id="class-key-dupe-second">
+			<option>Option 1</option>
+			<option>Option 2</option>
+		</select>
+	</div>
 </div>
 </body>
 </html>
diff --git a/tests/unit/controlgroup/core.js b/tests/unit/controlgroup/core.js
index dff3b1b12..789eefc90 100644
--- a/tests/unit/controlgroup/core.js
+++ b/tests/unit/controlgroup/core.js
@@ -160,4 +160,41 @@ QUnit.test( "Single controlgroup button - vertical", function( assert ) {
 		" ui-corner-tr ui-corner-tl ui-corner-bl ui corner-br" );
 } );
 
+QUnit.module( "Controlgroup: Non-empty class key", {
+	setup: function() {
+		this.classKey = $.ui.selectmenu.prototype.options.classes[ "ui-selectmenu-button-closed" ];
+		$.ui.selectmenu.prototype.options.classes[ "ui-selectmenu-button-closed" ] =
+			"something-custom";
+	},
+	teardown: function() {
+		$.ui.selectmenu.prototype.options.classes[ "ui-selectmenu-button-closed" ] = this.classKey;
+	}
+} );
+
+QUnit.test( "Controlgroup instantiates child widgets with correct options", function( assert ) {
+	assert.expect( 1 );
+
+	$( ".controlgroup-class-key-init" ).controlgroup();
+
+	assert.hasClasses( $( "#class-key-init-child" ).next(), "something-custom" );
+} );
+
+QUnit.test( "Controlgroup correctly assigns child widget classes options key", function( assert ) {
+	assert.expect( 2 );
+
+	$( ".controlgroup-class-key-dupe" ).controlgroup();
+
+	assert.strictEqual(
+		( $( "#class-key-dupe-first" )
+			.selectmenu( "option", "classes.ui-selectmenu-button-closed" )
+			.match( /something-custom/g ) || [] ).length, 1,
+		"Class 'something-custom' appears exactly once in the first widget's class key value" );
+
+	assert.strictEqual(
+		( $( "#class-key-dupe-second" )
+			.selectmenu( "option", "classes.ui-selectmenu-button-closed" )
+			.match( /something-custom/g ) || [] ).length, 1,
+		"Class 'something-custom' appears exactly once in the second widget's class key value" );
+} );
+
 } );