mutation-events.window.js

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This WPT test may be referenced by the following Test IDs:
- /html/webappapis/dynamic-markup-insertion/opening-the-input-stream/mutation-events.window.html - WPT Dashboard Interop Dashboard

// In an ideal world this test would eventually be obsolete due to mutation events disappearing. Or

// would have to change to account for mutation events not firing synchronously. Neither seems

// realistic to the author though.

test(t => {

  const frame = document.body.appendChild(document.createElement("iframe"));

  frame.contentWindow.addEventListener("DOMNodeInserted", t.unreached_func());

  frame.contentWindow.addEventListener("DOMNodeInserted", t.unreached_func(), true);

  frame.contentWindow.addEventListener("DOMNodeInsertedIntoDocument", t.unreached_func(), true);

  frame.contentWindow.addEventListener("DOMNodeRemoved", t.unreached_func());

  frame.contentWindow.addEventListener("DOMNodeRemoved", t.unreached_func(), true);

  frame.contentWindow.addEventListener("DOMNodeRemovedFromDocument", t.unreached_func(), true);

  frame.contentWindow.addEventListener("DOMSubtreeModified", t.unreached_func());

  frame.contentWindow.addEventListener("DOMSubtreeModified", t.unreached_func(), true);

  assert_equals(frame.contentDocument.documentElement.localName, "html");

  assert_equals(frame.contentDocument.open(), frame.contentDocument);

  assert_equals(frame.contentDocument.documentElement, null);

  frame.contentDocument.write("<div>heya</div>");

  frame.contentDocument.close();

  assert_equals(frame.contentDocument.documentElement.localName, "html");

  frame.remove();

}, "document.open(), the HTML parser, and mutation events");