usecounter-position3value-background.html

<!DOCTYPE html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
'use strict';

test(() => {
    let ThreeValuedPositionBackgroundPosition = 2001; // From UseCounter.h

    let isCounted = () => internals.isUseCounted(document, ThreeValuedPositionBackgroundPosition);
    var div = document.createElement('div');

    // usecounter-position3value-background-position.html
    // tests that other position-using properties do not
    // increment the counter.

    div.style = 'background: left;';
    div.style = 'background: left 10%;';
    div.style = 'background: left 10% top 20%;';
    assert_false(isCounted(),
                 '1,2,4 values should not be counted');

    div.style = 'background: left 10% top;';
    assert_true(isCounted(),
                'background should be counted');
}, 'Three valued position syntax is use counted for background');
</script>

chromium/third_party/blink/web_tests/fast/css/usecounter-position3value-background.html