Event: Warn and fill event aliases

Fixes jquery#230

Author: dmethvin

src/event.js

@@ -75,6 +75,20 @@ jQuery.each( [ "load", "unload", "error" ], function( _, name ) {
 
 } );
 
+jQuery.each( ( "blur focus focusin focusout resize scroll click dblclick " +
+	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
+	"change select submit keydown keypress keyup contextmenu" ).split( " " ),
+	function( i, name ) {
+
+	// Handle event binding
+	jQuery.fn[ name ] = function( data, fn ) {
+		migrateWarn( "jQuery.fn." + name + "() is deprecated" );
+		return arguments.length > 0 ?
+			this.on( name, null, data, fn ) :
+			this.trigger( name );
+	};
+} );
+
 // Trigger "ready" event only once, on document ready
 jQuery( function() {
 	jQuery( window.document ).triggerHandler( "ready" );
@@ -107,5 +121,9 @@ jQuery.fn.extend( {
 		return arguments.length === 1 ?
 			this.off( selector, "**" ) :
 			this.off( types, selector || "**", fn );
+	},
+	hover: function( fnOver, fnOut ) {
+		migrateWarn( "jQuery.fn.hover() is deprecated" );
+		return this.on( "mouseenter", fnOver ).on( "mouseleave", fnOut || fnOver );
 	}
 } );

test/event.js

@@ -94,6 +94,37 @@ QUnit.test( ".delegate() and .undelegate()", function( assert ) {
 	} );
 } );
 
+QUnit.test( "Event aliases", function( assert) {
+	assert.expect( 16 );
+
+	var $div = jQuery( "<div />" );
+
+	"scroll click submit keydown".split( " " ).forEach( function( name ) {
+		expectWarning( "." + name + "()", 1, function() {
+			$div[ name ]( function( event ) {
+				assert.equal( event.type, name, name)
+			} )[ name ]();
+		} );
+	} );
+
+	expectWarning( ".hover() one-arg", function() {
+		$div.hover( function( event ) {
+			assert.ok( /mouseenter|mouseleave/.test( event.type ), event.type );
+		} ).trigger( "mouseenter" ).trigger( "mouseleave" );
+	} );
+
+	expectWarning( ".hover() two-arg", function() {
+		$div.hover(
+			function( event ) {
+				assert.equal( "mouseenter", event.type, event.type );
+			},
+			function( event ) {
+				assert.equal( "mouseleave", event.type, event.type );
+			}
+		).trigger( "mouseenter" ).trigger( "mouseleave" );
+	} );
+} );
+
 test( "custom ready", function( assert ) {
 	assert.expect( 2 );