<!doctype html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../assert_selection.js"></script>
<script>
function swapMarks(string) {
    if (string.indexOf('^') === -1)
        return string;
    return string.replace('^', '$').replace('|', '^').replace('$', '|');
}

function test_selection(sample, closure, expected, description) {
    test(() => assert_selection(sample, closure, expected),
        description + '; anchor is first');
    test(() => assert_selection(swapMarks(sample), closure, swapMarks(expected)),
        description + '; focus is first');
}

function doInsert(selection, offset) {
    const element = selection.document.querySelector('p');
    element.firstChild.insertData(offset, '_'.repeat(13));
}

function doDelete(selection, offset, length) {
    const element = selection.document.querySelector('p');
    element.firstChild.deleteData(offset, length);
}

// Insertion tests
test_selection(
    '<p>Abcd efgh X^Y blah i|jkl</p>',
    selection => doInsert(selection, 10),
    '<p>Abcd efgh _____________X^Y blah i|jkl</p>',
    'insertData at 10');

test_selection(
    '<p>Abcd efgh X^Y blah i|jkl</p>',
    selection => doInsert(selection, 11),
    '<p>Abcd efgh X^_____________Y blah i|jkl</p>',
    'insertData at 11');

test_selection(
    '<p>Abcd efgh X^Y blah i|jkl</p>',
    selection => doInsert(selection, 12),
    '<p>Abcd efgh X^Y_____________ blah i|jkl</p>',
    'insertData at 12');

test_selection(
    '<p>Abcd efgh X^Y blah i|jkl</p>',
    selection => doInsert(selection, 17),
    '<p>Abcd efgh X^Y blah_____________ i|jkl</p>',
    'insertData at 17');

test_selection(
    '<p>Abcd efgh X^Y blah i|jkl</p>',
    selection => doInsert(selection, 19),
    '<p>Abcd efgh X^Y blah i|_____________jkl</p>',
    'insertData at 19');

// Deletion tests
test_selection(
    '<p>Abcd efgh T^he Range i|jkl</p>',
    selection => doDelete(selection, 5, 8),
    '<p>Abcd ^ Range i|jkl</p>',
    'deleteData(5, 8)');

test_selection(
    '<p>Abcd efgh T^he Range i|jkl</p>',
    selection => doDelete(selection, 5, 6),
    '<p>Abcd ^he Range i|jkl</p>',
    'deleteData(5, 6)');

test_selection(
    '<p>Abcd efgh T^he Range i|jkl</p>',
    selection => doDelete(selection, 5, 17),
    '<p>Abcd |kl</p>',
    'deleteData(5, 17)');

// Delete node containing selection
test_selection(
    '<p>Abcd <em>efgh T^he Range i|j</em>kl</p>',
    selection => selection.document.querySelector('em').remove(),
    '<p>Abcd |kl</p>',
    'delete node containing selection');
</script>