Blame dom/base/test/test_domparsing.html

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<html>
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<head>
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  <meta charset=utf-8>
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  <title>Test for the DOM Parsing and Serialization Standard</title>
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  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body>
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Mozilla Bug 816410
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<script type="application/javascript">
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"use strict";
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/** Test for Bug 816410 **/
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function throws(fn, type, message) {
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  try {
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    fn();
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    ok(false, message);
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  } catch (e) {
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    if (type) {
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      is(e.name, type, message);
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    } else {
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      ok(true, message);
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    }
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  }
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}
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let parser = new DOMParser();
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is(typeof parser.parseFromString, "function", "parseFromString should exist");
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is(typeof parser.parseFromBuffer, "undefined", "parseFromBuffer should NOT be visible from unprivileged callers");
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is(typeof parser.parseFromStream, "undefined", "parseFromStream should NOT be visible from unprivileged callers");
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is(typeof parser.init, "undefined", "init should NOT be visible from unprivileged callers");
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// The three-arguments constructor should not be visible from
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// unprivileged callers for interoperability with other browsers.
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// But we have no way to do that right now.
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try {
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  new DOMParser(undefined);
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  new DOMParser(null);
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  new DOMParser(false);
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  new DOMParser(0);
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  new DOMParser("");
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  new DOMParser({});
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} catch (e) {
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  todo(false, "DOMParser constructor should not throw for extra arguments");
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}
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let serializer = new XMLSerializer();
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is(typeof serializer.serializeToString, "function", "serializeToString should exist");
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is(typeof serializer.serializeToStream, "undefined", "serializeToStream should NOT be visible from unprivileged callers");
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// XMLSerializer constructor should not throw for extra arguments
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new XMLSerializer(undefined);
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new XMLSerializer(null);
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new XMLSerializer(false);
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new XMLSerializer(0);
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new XMLSerializer("");
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new XMLSerializer({});
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let tests = [
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  {input: "<html></html>", type: "text/html",
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   expected: '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body></body></html>'},
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  {input: "<xml></xml>", type: "text/xml", expected: "<xml/>"},
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  {input: "<xml></xml>", type: "application/xml", expected: "<xml/>"},
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  {input: "<html></html>", type: "application/xhtml+xml", expected: "<html/>"},
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  {input: "<svg></svg>", type: "image/svg+xml", expected: "<svg/>"},
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];
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for (let t of tests) {
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  is(serializer.serializeToString(parser.parseFromString(t.input, t.type)), t.expected,
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     "parseFromString test for " + t.type);
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}
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throws(function() {
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  parser.parseFromString("<xml></xml>", "foo/bar");
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}, "TypeError", "parseFromString should throw for the unknown type");
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</script>
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</body>
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</html>