Core: make isNumeric test work on Symbol

LizaLemons · gibson042 · commit d846c25dca4a · 2015-10-25T14:12:53.000-04:00
Ref #2645 Closes #2657 (cherry picked from commit 0703fd5)
diff --git a/src/core.js b/src/core.js
@@ -221,7 +221,8 @@ jQuery.extend( {
 		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
 		// subtraction forces infinities to NaN
 		// adding 1 corrects loss of precision from parseFloat (#15100)
-		return !jQuery.isArray( obj ) && ( obj - parseFloat( obj ) + 1 ) >= 0;
+		var realStringObj = obj && obj.toString();
+		return !jQuery.isArray( obj ) && ( realStringObj - parseFloat( realStringObj ) + 1 ) >= 0;
 	},
 
 	isEmptyObject: function( obj ) {
diff --git a/test/unit/core.js b/test/unit/core.js
@@ -504,6 +504,13 @@ QUnit.test( "isNumeric", function( assert ) {
 	assert.equal( t( new Date() ), false, "Instance of a Date" );
 } );
 
+QUnit[ typeof Symbol === "function" ? "test" : "skip" ]( "isNumeric(Symbol)", function( assert ) {
+	assert.expect( 2 );
+
+	assert.equal( jQuery.isNumeric( Symbol() ), false, "Symbol" );
+	assert.equal( jQuery.isNumeric( Object( Symbol() ) ), false, "Symbol inside an object" );
+} );
+
 QUnit.test( "isXMLDoc - HTML", function( assert ) {
 	assert.expect( 4 );
 
