[parse-heading.html]
  [":heading" should be a valid selector]
    expected: FAIL

  [":heading(2)" should be a valid selector]
    expected: FAIL

  [":heading(99999)" should be a valid selector]
    expected: FAIL

  [":heading(0)" should be a valid selector]
    expected: FAIL

  [":heading(0, 1, 2)" should be a valid selector]
    expected: FAIL

  [":heading(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)" should be a valid selector]
    expected: FAIL

  [":heading(-1)" should be a valid selector]
    expected: FAIL

  ["h1:heading" should be a valid selector]
    expected: FAIL

  ["h1:heading(1)" should be a valid selector]
    expected: FAIL

  ["h1:heading(2)" should be a valid selector]
    expected: FAIL