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chromium/third_party/blink/web_tests/external/wpt/css/geometry/DOMMatrix-invertSelf.html 

<!DOCTYPE html>
<title>Geometry Interfaces: DOMMatrix and DOMMatrixReadOnly invertSelf</title>
<link rel="help" href="https://drafts.fxtf.org/geometry/#DOMMatrix">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/dommatrix-test-util.js"></script>
<script>
[
  [[0, 0, 0, 0, 0, 0], [NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN]],
  [[1, 1, 1, 1, 1, 1], [NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN]],
  [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
                       [NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN]],
  [[1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
                       [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1]],
].forEach(([actual_array, expected_array]) => {
  var is2D = false;
  test(() => {
    const actual = new DOMMatrix(actual_array);
    const actualInvertSelfReturnValue = actual.invertSelf();
    assert_true(actual === actualInvertSelfReturnValue);
    const expected = new DOMMatrix(expected_array);
    checkDOMMatrix(actual, expected, is2D);
  }, `new DOMMatrix([${actual_array}]).invertSelf()`);
});
</script>