Fix l10n promises

core/js/l10n.js

@@ -37,10 +37,11 @@ OC.L10N = {
 	load: function(appName, callback) {
 		// already available ?
 		if (this._bundles[appName] || OC.getLocale() === 'en') {
-			if (callback) {
-				callback();
-			}
-			return;
+			var deferred = $.Deferred();
+			var promise = deferred.promise();
+			promise.then(callback);
+			deferred.resolve();
+			return promise;
 		}
 
 		var self = this;

core/js/tests/specs/l10nSpec.js

@@ -130,19 +130,23 @@ describe('OC.L10N tests', function() {
 			localeStub.restore();
 		});
 		it('calls callback if translation already available', function() {
+			var promiseStub = sinon.stub();
 			var callbackStub = sinon.stub();
 			OC.L10N.register(TEST_APP, {
 				'Hello world!': 'Hallo Welt!'
 			});
-			OC.L10N.load(TEST_APP, callbackStub);
+			OC.L10N.load(TEST_APP, callbackStub).then(promiseStub);
 			expect(callbackStub.calledOnce).toEqual(true);
+			expect(promiseStub.calledOnce).toEqual(true);
 			expect(fakeServer.requests.length).toEqual(0);
 		});
 		it('calls callback if locale is en', function() {
 			var localeStub = sinon.stub(OC, 'getLocale').returns('en');
+			var promiseStub = sinon.stub();
 			var callbackStub = sinon.stub();
-			OC.L10N.load(TEST_APP, callbackStub);
+			OC.L10N.load(TEST_APP, callbackStub).then(promiseStub);
 			expect(callbackStub.calledOnce).toEqual(true);
+			expect(promiseStub.calledOnce).toEqual(true);
 			expect(fakeServer.requests.length).toEqual(0);
 		});
 	});