js(TypeError, function() {
        rule.set(4, "0 #123");
    });
});

test(function() {
    let text = rules[1].cssText;
    let rule = rules[1];
    assert_equals(text.indexOf("font-family"), -1);
    assert_equals(rule.fontFamily, "");
});

test(function() {
    let text = rules[2].cssText;
    let rule = rules[2];
    assert_equals(text.indexOf("font:"), -1);
    assert_equals(rule.fontFamily, "");
});

test(function() {
    let text = rules[3].cssText;
    let rule = rules[3];
    assert_equals(text.in