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Test Info: Warnings
- This test gets skipped with pattern: os == 'android'
- Manifest: dom/base/test/chrome/chrome.toml
<?xml version="1.0"?>
<!--
-->
onload="test()">
<!-- test results are displayed in the html:body -->
</body>
<!-- test code goes here -->
<script type="application/javascript">
<![CDATA[
SimpleTest.waitForExplicitFinish();
var b;
function callback(r) {
is(r[0].type, "attributes");
is(r[0].oldValue, b.getAttribute("src"));
setTimeout(continueTest, 500);
}
function continueTest() {
// Check that a new page wasn't loaded.
is(b.contentDocument.documentElement.textContent, "testvalue");
SimpleTest.finish();
}
function test() {
b = document.getElementById("b");
var m = new MutationObserver(callback);
m.observe(b, { attributes: true, attributeOldValue: true });
b.contentDocument.documentElement.textContent = "testvalue";
b.setAttribute("src", b.getAttribute("src"));
}
]]>
</script>
<browser id="b" src="data:text/plain,initial"/>
</window>