| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../../../resources/js-test-pre.js"></script> |
| <div id="testDiv"><p></p></div> |
| <script> |
| description("Tests that calls of appendChild() lead to mutation events even if they are no-ops."); |
| jsTestIsAsync = true; |
| |
| var testDiv = document.getElementById("testDiv"); |
| |
| function testMutationObserver() |
| { |
| var config = { childList: true }; |
| var observer = new MutationObserver(function(mutations) { |
| testPassed("Mutation observer was notified"); |
| observer.disconnect(); |
| testMutationEventListener(); |
| }); |
| |
| observer.observe(testDiv, config); |
| testDiv.appendChild(testDiv.lastChild); |
| } |
| |
| function testMutationEventListener() |
| { |
| wasMutationEventListenerCalled = false; |
| testDiv.addEventListener("DOMSubtreeModified", function() { |
| wasMutationEventListenerCalled = true; |
| }); |
| testDiv.appendChild(testDiv.lastChild); |
| shouldBeTrue("wasMutationEventListenerCalled"); |
| finishJSTest(); |
| } |
| |
| testMutationObserver(); |
| </script> |
| <script src="../../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
