test_url_data.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Test URL API - data:plain</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1018682">Mozilla Bug 1018682</a>

<script type="application/javascript">

var base = new URL("data:text/plain,");

let relative;

try {

  relative = new URL("a", base);

  ok(false, "Relative URL from a data:text/plain should not work.");

} catch (e) {

  ok(true, "Relative URL from a data:text/plain should not work.");

base.protocol = "chrome:";

is(base.protocol, "chrome:", "The protocol should be changed from data to chrome.");

try {

  relative = new URL("a", base);

  ok(true, "Relative URL from a chrome: should work.");

} catch (e) {

  ok(false, "Relative URL from a chrome: should work.");

base.protocol = "http:";

ok(true, "Protocol: http not changed (special scheme)");

is(base.href, "chrome://text/plain,", "Base URL is correct");

relative = new URL("a", base);

ok(relative, "This works.");

is(relative.href, "chrome://text/a", "Relative URL is correct");

</script>

</body>

</html>