From 9d76c0b163675505d1a901e5fe5249a2c55609bc Mon Sep 17 00:00:00 2001
From: Michał Gołębiowski-Owczarek <m.goleb@gmail.com>
Date: Mon, 2 Mar 2020 23:02:42 +0100
Subject: Data:Event:Manipulation: Prevent collisions with Object.prototype

Make sure events & data keys matching Object.prototype properties work.
A separate fix for such events on cloned elements was added as well.

Fixes gh-3256
Closes gh-4603
---
 test/unit/data.js  | 15 +++++++++++++++
 test/unit/event.js | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)

(limited to 'test/unit')

diff --git a/test/unit/data.js b/test/unit/data.js
index 154ea5eeb..cba519e9e 100644
--- a/test/unit/data.js
+++ b/test/unit/data.js
@@ -998,3 +998,18 @@ QUnit.test( ".data(prop) does not create expando", function( assert ) {
 		}
 	}
 } );
+
+QUnit.test( "keys matching Object.prototype properties  (gh-3256)", function( assert ) {
+	assert.expect( 2 );
+
+	var div = jQuery( "<div/>" );
+
+	assert.strictEqual( div.data( "hasOwnProperty" ), undefined,
+		"hasOwnProperty not matched (before forced data creation)" );
+
+	// Force the creation of a data object for this element.
+	div.data( { foo: "bar" } );
+
+	assert.strictEqual( div.data( "hasOwnProperty" ), undefined,
+		"hasOwnProperty not matched (after forced data creation)" );
+} );
diff --git a/test/unit/event.js b/test/unit/event.js
index cecad3f34..938c66876 100644
--- a/test/unit/event.js
+++ b/test/unit/event.js
@@ -1796,6 +1796,49 @@ QUnit.test( "jQuery.off using dispatched jQuery.Event", function( assert ) {
 		.remove();
 } );
 
+QUnit.test( "events with type matching an Object.prototype property (gh-3256)", function( assert ) {
+	assert.expect( 1 );
+
+	var elem = jQuery( "<div/>" ),
+		eventFired = false;
+
+	elem.appendTo( "#qunit-fixture" );
+
+	try {
+		elem
+			.one( "hasOwnProperty", function() {
+				eventFired = true;
+			} )
+			.trigger( "hasOwnProperty" );
+	} finally {
+		assert.strictEqual( eventFired, true, "trigger fired without crashing" );
+	}
+} );
+
+QUnit.test( "events with type matching an Object.prototype property, cloned element (gh-3256)",
+	function( assert ) {
+	assert.expect( 1 );
+
+	var elem = jQuery( "<div/>" ),
+		eventFired = false;
+
+	elem.appendTo( "#qunit-fixture" );
+
+	try {
+		// Make sure the original element has some event data.
+		elem.on( "click", function() {} );
+
+		elem
+			.clone( true )
+			.one( "hasOwnProperty", function() {
+				eventFired = true;
+			} )
+			.trigger( "hasOwnProperty" );
+	} finally {
+		assert.strictEqual( eventFired, true, "trigger fired without crashing" );
+	}
+} );
+
 // selector-native does not support scope-fixing in delegation
 QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "delegated event with delegateTarget-relative selector", function( assert ) {
 	assert.expect( 3 );
-- 
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