Document-open.html

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This WPT test may be referenced by the following Test IDs:
- /selection/Document-open.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>Selection Document.open() tests</title>

<div id=log></div>

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

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

<script>

"use strict";

const iframe = document.createElement("iframe");

async_test(t => {

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

    const originalSelection = iframe.contentWindow.getSelection();

    assert_equals(originalSelection.rangeCount, 0, "rangeCount must initially be 0");

    iframe.contentDocument.body.appendChild(iframe.contentDocument.createTextNode("foo"));

    const range = iframe.contentDocument.createRange();

    range.selectNodeContents(iframe.contentDocument.body);

    iframe.contentWindow.getSelection().addRange(range);

    assert_equals(originalSelection.rangeCount, 1, "rangeCount must be 1 after adding a range");

    iframe.contentDocument.open();

    assert_equals(iframe.contentWindow.getSelection(), originalSelection, "After document.open(), the Selection object must be the same");

    assert_equals(iframe.contentWindow.getSelection().rangeCount, 1, "After document.open(), rangeCount must still be 1");

    document.body.removeChild(iframe);

});

  document.body.appendChild(iframe);

}, "Selection must not be replaced with a new object after document.open()");

</script>