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<!DOCTYPE html>
<script src="../../resources/js-test.js"></script>
<script>
description('Tests getting and assigning values to document.body');
onload = function() {
frame = document.createElement('iframe');
document.body.appendChild(frame);
shouldThrow('frame.contentDocument.body = document.createElement("div")', '"HierarchyRequestError: Failed to set the \'body\' property on \'Document\': The new body element is of type \'DIV\'. It must be either a \'BODY\' or \'FRAMESET\' element."');
shouldNotThrow('frame.contentDocument.body = document.createElement("frameset")');
shouldBe('frame.contentDocument.documentElement.childNodes.length', '2');
shouldNotThrow('frame.contentDocument.body = document.createElement("body")');
shouldBe('frame.contentDocument.documentElement.childNodes.length', '2');
observer = new MutationObserver(function(records) { });
observer.observe(frame.contentDocument, { subtree: true, childList: true });
// If the nodes are the same this should be a noop.
frame.contentDocument.body = frame.contentDocument.body;
shouldBe('observer.takeRecords().length', '0');
// WebKit calls importNode() and appends a clone instead of the element you wanted.
newBody = document.createElement("body");
frame.contentDocument.body = newBody;
shouldBe('frame.contentDocument.body', 'newBody');
newBody = frame.contentDocument.createElement('body');
frame.contentDocument.body = newBody;
shouldBe("frame.contentDocument.body", "newBody")
var html = frame.contentDocument.documentElement;
html.appendChild(document.createElement('body'));
html.appendChild(document.createElement('frameset'));
shouldBeEqualToString('frame.contentDocument.body.tagName', 'BODY');
};
</script>
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