send-document-lone-surrogate.html

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This WPT test may be referenced by the following Test IDs:
- /xhr/send-document-lone-surrogate.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>XMLHttpRequest: send() Document containing lone surrogate</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script>

"use strict";

// Test that XHR.send() with a Document containing a lone surrogate

// does not throw and properly encodes the surrogate as U+FFFD

async_test(t => {

  // Create a document with a lone surrogate in the body

  const doc = document.implementation.createHTMLDocument("");

  doc.body.textContent = "Hello \uD800 World"; // \uD800 is a lone high surrogate

  const xhr = new XMLHttpRequest();

  xhr.open("POST", "resources/content.py");

  xhr.onload = t.step_func_done(() => {

    assert_equals(xhr.status, 200);

    // The lone surrogate should be encoded as U+FFFD (replacement character)

    // which in UTF-8 is 0xEF 0xBF 0xBD

    assert_true(xhr.responseText.includes("Hello \uFFFD World"), "Response should contain the text");

});

  xhr.onerror = t.unreached_func("XHR should not error");

  // This should not throw even though the document contains a lone surrogate

  xhr.send(doc);

}, "send() with Document containing lone surrogate should not throw");

</script>