Function assert_tolerance

test/fixtures/wpt/resources/check-layout-th.js:21–26

(actual, expected, message)

}

function assert_tolerance(actual, expected, message)
{
    if (isNaN(expected) || isNaN(actual) || Math.abs(actual - expected) >= 1) {
        assert_equals(actual, Number(expected), message);
    }
}

function checkDataKeys(node) {
  // The purpose of this list of data-* attributes is simply to ensure typos