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<!DOCTYPE html>
<html>
<head>
<title>Testing the new font-style values introduced in CSS Fonts level 4</title>
<link rel="help" href="https://www.w3.org/TR/css-fonts-4/#font-style-prop" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="test"></div>
<script>
var testFontStyle = [
{ style: "italic", expectedResult: true, message: "'italic' is valid" },
{ style: "italic 20deg", expectedResult: false, message: "'italic' followed by angle is invalid" },
{ style: "italic a", expectedResult: false, message: "'italic' followed by non-number is invalid" },
{ style: "oblique", expectedResult: true, message: "'oblique' is valid" },
{ style: "oblique 0deg", expectedResult: true, message: "'oblique' followed by zero degrees is valid" },
{ style: "oblique 20deg", expectedResult: true, message: "'oblique' followed by positive angle in degrees is valid" },
{ style: "oblique 0.5rad", expectedResult: true, message: "'oblique' followed by positive angle in radians is valid", expectedValue: /^oblique 28\.64\d*deg$/ },
{ style: "oblique 20grad", expectedResult: true, message: "'oblique' followed by positive angle in gradians is valid", expectedValue: "oblique 18deg" },
{ style: "oblique 0.1turn", expectedResult: true, message: "'oblique' followed by positive angle in turns is valid", expectedValue: "oblique 36deg" },
{ style: "oblique 20px", expectedResult: false, message: "'oblique' followed by number with invalid unit type is in valid" },
{ style: "oblique -20deg", expectedResult: true, message: "'oblique' followed by negative angle is valid" },
{ style: "oblique 20.5deg", expectedResult: true, message: "'oblique' followed by fractional angle is valid" },
{ style: "oblique 90deg", expectedResult: true, message: "'oblique' followed by maxumum 90 degree angle is valid" },
{ style: "oblique -90deg", expectedResult: true, message: "'oblique' followed by minimum -90 degree angle is valid" },
{ style: "oblique 90.01deg", expectedResult: false, message: "'oblique' followed by positive out of range angle is in invalid" },
{ style: "oblique -90.01deg", expectedResult: false, message: "'oblique' followed by negative out of range angle is in invalid" },
{ style: "oblique 10", expectedResult: false, message: "'oblique' followed by unit-less value is invalid" },
{ style: "oblique 30deg", expectedResult: true, message: "'oblique' followed by positive angle is valid" },
{ style: "oblique a", expectedResult: false, message: "'oblique' followed by non-number is invalid" },
{ style: "oblique 20deg a", expectedResult: false, message: "'oblique' and angle followed by non-number is invalid" },
{ style: "oblique -", expectedResult: false, message: "'oblique' followed by isolated minus is invalid" },
{ style: "oblique - 20deg", expectedResult: false, message: "'oblique' followed by minus and angle separated by space is invalid" },
{ style: "oblique -a", expectedResult: false, message: "'oblique' followed by minus and non-number is invalid" },
{ style: "oblique calc(50deg)", expectedResult: true, message: "'oblique' followed by calc is valid", expectedValue: "oblique 50deg" },
{ style: "oblique calc(-120deg)", expectedResult: true, message: "'oblique' followed by calc is valid even if it must be clamped (no computation)", expectedValue: "oblique -90deg" },
{ style: "oblique calc(6 * 20deg)", expectedResult: true, message: "'oblique' followed by calc is valid even if it must be clamped (with computation)", expectedValue: "oblique 90deg" },
{ style: "oblique calc(10grad + 5deg)", expectedResult: true, message: "'oblique' followed by calc is valid even if it mixes units (with computation)", expectedValue: "oblique" }
];
testFontStyle.forEach(function (testCase) {
test(() => {
assert_equals(window.CSS.supports("font-style", testCase.style), testCase.expectedResult, "Font-style supports: " + testCase.message);
}, "Font-style (supports): " + testCase.message);
});
testFontStyle.forEach(function (testCase) {
if (testCase.expectedResult) {
test(() => {
let element = document.getElementById("test");
element.style = "font-style: " + testCase.style;
let actualValue = getComputedStyle(element).fontStyle;
let expectedValue = testCase.expectedValue ?? testCase.style;
let assert_fn = expectedValue instanceof RegExp ? assert_regexp_match : assert_equals;
assert_fn(actualValue, expectedValue, "Font-style computed style: " + testCase.message);
}, "Font-style (computed): " + testCase.message);
}
});
</script>
</body>
</html>
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