modify-extend-by-character.html

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This WPT test may be referenced by the following Test IDs:
- /selection/bidi/modify-extend-by-character.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Selection.modify() extend character granularity in bidi text</title>

<link rel="help" href="https://w3c.github.io/selection-api/#dom-selection-modify">

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

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

<script src=selection-modify-bidi-data.js></script>

<body>

<script>

createBidiFixtures();

const selection = getSelection();

const alter = "extend";

for (const [divId, count, dir, start, end, name] of [...logicalTests, ...visualTests]) {

  test(() => {

    selection.collapse(document.getElementById(divId).firstChild, start);

    for (let i = 0; i < count; i++)

      selection.modify(alter, dir, "character");

    assert_equals(selection.anchorOffset, start, "anchorOffset should not change");

    assert_equals(selection.focusOffset, end, "focusOffset after extend");

  }, name.replace("{alter}", alter));

</script>