css/css-backgrounds/parsing/background-image-invalid.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Backgrounds and Borders Module Level 3: parsing background-image with invalid values</title>
<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#background-image">
<link rel="help" href="https://drafts.csswg.org/css-images/#radial-gradients">
<meta name="assert" content="background-image supports only the grammar '<bg-image>#'.">
<meta name="assert" content="Negative radial-gradient radii are invalid.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
</head>
<body>
<script>
test_invalid_value("background-image", "none, auto");

// Negative radii are invalid.
test_invalid_value("background-image", "radial-gradient(circle -10px at center, red, blue)");
test_invalid_value("background-image", "repeating-radial-gradient(-10px at center, red, blue)");
test_invalid_value("background-image", "radial-gradient(ellipse -20px 30px at center, red, blue)");
test_invalid_value("background-image", "repeating-radial-gradient(-20% 30% at center, red, blue)");
test_invalid_value("background-image", "radial-gradient(20px -30px at center, red, blue)");
test_invalid_value("background-image", "repeating-radial-gradient(20px -30px ellipse at center, red, blue)");

test_invalid_value("background-image", "cross-fade(auto blue, 50% red)");
</script>
</body>
</html>