Attributes: fix setting selected on an option in IE<=11

Fixes gh-2732
Close gh-2840

1 files changed, 31 insertions, 0 deletions

diff --git a/test/unit/attributes.js b/test/unit/attributes.js
index 7f92d3505..f691e31ee 100644
--- a/test/unit/attributes.js
+++ b/test/unit/attributes.js
@@ -796,6 +796,37 @@ QUnit.test( "prop('tabindex', value)", function( assert ) {
 	assert.equal( clone[ 0 ].getAttribute( "tabindex" ), "1", "set tabindex on cloned element" );
 } );
 
+QUnit.test( "option.prop('selected', true) affects select.selectedIndex (gh-2732)", function( assert ) {
+	assert.expect( 2 );
+
+	function addOptions( $elem ) {
+		return $elem.append(
+			jQuery( "<option/>" ).val( "a" ).text( "One" ),
+			jQuery( "<option/>" ).val( "b" ).text( "Two" ),
+			jQuery( "<option/>" ).val( "c" ).text( "Three" )
+		)
+		.find( "[value=a]" ).prop( "selected", true ).end()
+		.find( "[value=c]" ).prop( "selected", true ).end();
+	}
+
+	var $optgroup,
+		$select = jQuery( "<select/>" );
+
+	// Check select with options
+	addOptions( $select ).appendTo( "#qunit-fixture" );
+	$select.find( "[value=b]" ).prop( "selected", true );
+	assert.equal( $select[ 0 ].selectedIndex, 1, "Setting option selected affects selectedIndex" );
+
+	$select.empty();
+
+	// Check select with optgroup
+	$optgroup = jQuery( "<optgroup/>" );
+	addOptions( $optgroup ).appendTo( $select );
+	$select.find( "[value=b]" ).prop( "selected", true );
+
+	assert.equal( $select[ 0 ].selectedIndex, 1, "Setting option in optgroup selected affects selectedIndex" );
+} );
+
 QUnit.test( "removeProp(String)", function( assert ) {
 	assert.expect( 6 );
 	var attributeNode = document.createAttribute( "irrelevant" ),