Removes isPending and introduces state as a means to retrieve the...

Removes isPending and introduces state as a means to retrieve the Deferred/Promise state. Unit tests amended.

src/deferred.js

@@ -9,6 +9,7 @@ jQuery.extend({
 		var doneList = jQuery.Callbacks( "once memory" ),
 			failList = jQuery.Callbacks( "once memory" ),
 			progressList = jQuery.Callbacks( "memory" ),
+			state = "pending",
 			lists = {
 				resolve: doneList,
 				reject: failList,
@@ -19,11 +20,13 @@ jQuery.extend({
 				fail: failList.add,
 				progress: progressList.add,
 
+				state: function() {
+					return state;
+				},
+
+				// Deprecated
 				isResolved: doneList.fired,
 				isRejected: failList.fired,
-				isPending: function() {
-					return !progressList.locked();
-				},
 
 				then: function( doneCallbacks, failCallbacks, progressCallbacks ) {
 					deferred.done( doneCallbacks ).fail( failCallbacks ).progress( progressCallbacks );
@@ -78,9 +81,12 @@ jQuery.extend({
 			deferred[ key + "With" ] = lists[ key ].fireWith;
 		}
 
-		// Handle lists exclusiveness
-		deferred.done( failList.disable, progressList.lock )
-			.fail( doneList.disable, progressList.lock );
+		// Handle state
+		deferred.done( function() {
+			state = "resolved";
+		}, failList.disable, progressList.lock ).fail( function() {
+			state = "rejected";
+		}, doneList.disable, progressList.lock );
 
 		// Call given func if any
 		if ( func ) {

test/unit/deferred.js

@@ -8,11 +8,12 @@ jQuery.each( [ "", " - new operator" ], function( _, withNew ) {
 
 	test("jQuery.Deferred" + withNew, function() {
 
-		expect( 20 );
+		expect( 22 );
 
 		createDeferred().resolve().then( function() {
 			ok( true , "Success on resolve" );
 			ok( this.isResolved(), "Deferred is resolved" );
+			strictEqual( this.state(), "resolved", "Deferred is resolved (state)" );
 		}, function() {
 			ok( false , "Error on resolve" );
 		}).always( function() {
@@ -24,6 +25,7 @@ jQuery.each( [ "", " - new operator" ], function( _, withNew ) {
 		}, function() {
 			ok( true , "Error on reject" );
 			ok( this.isRejected(), "Deferred is rejected" );
+			strictEqual( this.state(), "rejected", "Deferred is rejected (state)" );
 		}).always( function() {
 			ok( true , "Always callback on reject" );
 		});
@@ -37,7 +39,7 @@ jQuery.each( [ "", " - new operator" ], function( _, withNew ) {
 
 		jQuery.each( "resolve reject".split( " " ), function( _, change ) {
 			createDeferred( function( defer ) {
-				ok( defer.isPending(), "pending after creation" );
+				strictEqual( defer.state(), "pending", "pending after creation" );
 				var checked = 0;
 				defer.progress(function( value ) {
 					strictEqual( value, checked, "Progress: right value (" + value + ") received" );
@@ -45,9 +47,9 @@ jQuery.each( [ "", " - new operator" ], function( _, withNew ) {
 				for( checked = 0; checked < 3 ; checked++ ) {
 					defer.notify( checked );
 				}
-				ok( defer.isPending(), "pending after notification" );
+				strictEqual( defer.state(), "pending", "pending after notification" );
 				defer[ change ]();
-				ok( !defer.isPending(), "not pending after " + change );
+				notStrictEqual( defer.state(), "pending", "not pending after " + change );
 				defer.notify();
 			});
 		});