html/semantics/tabular-data/the-table-element/remove-row.html

<!doctype html>
<meta charset="utf-8">
<title>Delete Row tests</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<table id="element">
  <thead>
    <th>First column</th>
    <th>Second column</th>
  </thead>
  <tbody>
    <tr>
      <td>1.1</td>
      <td>1.2</td>
    </tr>
    <tr>
      <td>2.1</td>
      <td>2.2</td>
    </tr>
  </tbody>
</table>

<script>
var el = document.getElementById('element');

test(function() {
  assert_throws_dom("IndexSizeError", function() {
    el.deleteRow(-2)
  })
}, 'deleteRow function invalid argument');
test(function() {
  assert_throws_dom("IndexSizeError", function() {
    el.deleteRow(el.rows.length)
  })
}, 'deleteRow function invalid argument bis');

test(function() {
  var old_length = el.rows.length;
  el.insertRow(-1);
  el.deleteRow(-1);
  assert_equals(old_length, el.rows.length);
}, "check normal deleteRow");
test(function() {
  assert_equals(el.rows.length, 3);
  do {
    var old_length = el.rows.length;
    el.deleteRow(-1);
    assert_equals(el.rows.length, old_length - 1);
  } while (el.rows.length);
}, "check normal deleteRow bis");

test(function() {
  assert_equals(el.rows.length, 0);
  el.deleteRow(-1);
}, 'deleteRow(-1) with no rows');

test(function() {
  assert_equals(el.rows.length, 0);
  assert_throws_dom("IndexSizeError", function() {
    el.deleteRow(0);
  });
}, 'deleteRow(0) with no rows');
</script>