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<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>OffscreenCanvas test: 2d.text.measure.getActualBoundingBox-exceptions.tentative</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>

<h1>2d.text.measure.getActualBoundingBox-exceptions.tentative</h1>
<p class="desc">Check that TextMetrics::getActualBoundingBox() throws when using invalid indexes.</p>


<script>
var t = async_test("Check that TextMetrics::getActualBoundingBox() throws when using invalid indexes.");
var t_pass = t.done.bind(t);
var t_fail = t.step_func(function(reason) {
    throw reason;
});
t.step(function() {

  var canvas = new OffscreenCanvas(100, 50);
  var ctx = canvas.getContext('2d');

  const kTexts = [
    'UNAVAILABLE',
    '🏁🎢🏁',
    'οΌ‰οΌˆγ‚οΌ‰οΌˆ',
    '-abcd_'
  ]

  for (const text of kTexts) {
    const tm = ctx.measureText(text);
    // Handled by the IDL binding.
    assert_throws_js(TypeError, () => tm.getActualBoundingBox(-1, 0) );
    assert_throws_js(TypeError, () => tm.getActualBoundingBox(0, -1) );
    assert_throws_js(TypeError, () => tm.getActualBoundingBox(-1, -1) );
    // Thrown in TextMetrics.
    assert_throws_dom("IndexSizeError",
                      () => tm.getActualBoundingBox(text.length, 0) );
    assert_throws_dom("IndexSizeError",
                      () => tm.getActualBoundingBox(0, text.length + 1) );
    assert_throws_dom("IndexSizeError",
                      () => tm.getActualBoundingBox(text.length, text.length + 1) );
  }
  t.done();

});
</script>