<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-values-4/#comp-func">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#numbers">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#calc-type-checking">
<link rel="author" title="Apple Inc">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../support/parsing-testcommon.js"></script>
<script>
function test_invalid_number(value) {
  test_invalid_value('opacity', value);
}

// Syntax checking
test_invalid_number('abs()');
test_invalid_number('abs( )');
test_invalid_number('abs(,)');
test_invalid_number('abs(1, )');
test_invalid_number('abs(, 1)');
test_invalid_number('abs(1 + )');
test_invalid_number('abs(1 - )');
test_invalid_number('abs(1 * )');
test_invalid_number('abs(1 / )');
test_invalid_number('abs(1 2)');
test_invalid_number('abs(1, , 2)');
test_invalid_number('abs(1, 2)');
test_invalid_number('sign()');
test_invalid_number('sign( )');
test_invalid_number('sign(,)');
test_invalid_number('sign(1, )');
test_invalid_number('sign(, 1)');
test_invalid_number('sign(1 + )');
test_invalid_number('sign(1 - )');
test_invalid_number('sign(1 * )');
test_invalid_number('sign(1 / )');
test_invalid_number('sign(1 2)');
test_invalid_number('sign(1, , 2)');
test_invalid_number('sign(1, 2)');

// Type checking
test_invalid_number('abs(0px)');
test_invalid_number('abs(0s)');
test_invalid_number('abs(0deg)');
test_invalid_number('abs(0Hz)');
test_invalid_number('abs(0dpi)');
test_invalid_number('abs(0fr)');
test_invalid_number('abs(1, 1%)');
test_invalid_number('abs(1, 0px)');
test_invalid_number('abs(1, 0s)');
test_invalid_number('abs(1, 0deg)');
test_invalid_number('abs(1, 0Hz)');
test_invalid_number('abs(1, 0dpi)');
test_invalid_number('abs(1, 0fr)');
test_invalid_number('sign(1, 1%)');
test_invalid_number('sign(1, 0px)');
test_invalid_number('sign(1, 0s)');
test_invalid_number('sign(1, 0deg)');
test_invalid_number('sign(1, 0Hz)');
test_invalid_number('sign(1, 0dpi)');
test_invalid_number('sign(1, 0fr)');
</script>