<!DOCTYPE html> <title>CSS Fonts 4 test: parsing the tech() function in the src descriptor</title> <link rel="help" href="https://drafts.csswg.org/css-fonts/#font-face-src-parsing"> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <style id="testStyle"> </style> <script> const sheet = testStyle.sheet; tests = [ // No tech() function { src: 'url("foo.ttf")', valid: true }, // Empty tech() is not valid { src: 'url("foo.ttf") tech()', valid: false }, // Check that each valid keyword is accepted { src: 'url("foo.ttf") tech(features-opentype)', valid: true }, { src: 'url("foo.ttf") tech(features-aat)', valid: true }, { src: 'url("foo.ttf") tech(color-COLRv0)', valid: true }, { src: 'url("foo.ttf") tech(color-COLRv1)', valid: true }, { src: 'url("foo.ttf") tech(color-sbix)', valid: true }, { src: 'url("foo.ttf") tech(color-CBDT)', valid: true }, { src: 'url("foo.ttf") tech(variations)', valid: true }, { src: 'url("foo.ttf") tech(palettes)', valid: true }, // tech() does not accept strings (unlike format()!) { src: 'url("foo.ttf") tech("features-opentype")', valid: false }, { src: 'url("foo.ttf") tech("color-COLRv0")', valid: false }, { src: 'url("foo.ttf") tech("variations")', valid: false }, // tech() accepts a comma-separated list of keywords { src: 'url("foo.ttf") tech(features-opentype, color-COLRv0, variations, palettes)', valid: true }, { src: 'url("foo.ttf") tech(features-opentype color-COLRv0 variations palettes)', valid: false }, // Invalid font-tech keywords should be a parse error { src: 'url("foo.ttf") tech(feature-opentype)', valid: false }, { src: 'url("foo.ttf") tech(feature-aat)', valid: false }, { src: 'url("foo.ttf") tech(feature-graphite)', valid: false }, { src: 'url("foo.ttf") tech(auto)', valid: false }, { src: 'url("foo.ttf") tech(default)', valid: false }, { src: 'url("foo.ttf") tech(inherit)', valid: false }, { src: 'url("foo.ttf") tech(initial)', valid: false }, { src: 'url("foo.ttf") tech(none)', valid: false }, { src: 'url("foo.ttf") tech(normal)', valid: false }, { src: 'url("foo.ttf") tech(xyzzy)', valid: false }, // format() function must precede tech() if both are present { src: 'url("foo.ttf") format(opentype) tech(features-opentype)', valid: true }, { src: 'url("foo.ttf") tech(features-opentype) format(opentype)', valid: false }, // Unsupported technology (for example: no browser has incremental transfer yet), might be // dropped from the list, next component of the list should be accepted. { src: 'url("foo.ttf") tech(incremental), url("bar.html")', dontcomparetech: true, valid: true }, { src: 'url("foo.ttf") tech(incremental, color-SVG, features-graphite, features-aat), url("bar.html")', dontcomparetech: true, valid: true }, { src: 'url("foo.ttf") tech(color-SVG, features-graphite), url("bar.html")', dontcomparetech: true, valid: true }, { src: 'url("foo.ttf") tech(color-SVG), url("bar.html")', dontcomparetech: true, valid: true }, { src: 'url("foo.ttf") tech(features-graphite), url("bar.html")', dontcomparetech: true, valid: true }, // No invalid functions. { src: 'url("foo.ttf") dummy("opentype") tech(variations)', valid: false }, { src: 'url("foo.ttf") dummy("opentype") dummy(variations)', valid: false }, { src: 'url("foo.ttf") format(opentype) tech(features-opentype) dummy(something)', valid: false }, // A parsing error in one component does not make the entire descriptor invalid. { src: 'url("foo.ttf") format(dummy), url("foo.ttf") tech(variations)', valid: true }, // check_same_tech isn't currently smart enough to handle this. { src: 'url("foo.ttf") tech(color), url("bar.html")', dontcomparetech: true, valid: true }, ]; // Assert that the two arguments have the same set of keywords in the tech() function, // (although their ordering may differ). function check_same_tech(serialized, specified) { if (!specified.includes("tech(")) { assert_false(serialized.includes("tech("), "expected no tech() function"); return; } // Extract the lists of tech() keywords and sort them for comparison. const tech = /tech\((.+)\)/; var specified_techs = tech.exec(specified)[1].split(/,\s*/).sort().join(", "); var serialized_techs = tech.exec(serialized)[1].split(/,\s*/).sort().join(", "); // Per CSSOM spec, keywords are serialized in ASCII-lowercase form: // https://drafts.csswg.org/cssom/#serialize-a-css-component-value assert_equals(serialized_techs, specified_techs.toLowerCase(), "expected matching tech() lists"); } for (let t of tests) { test(() => { assert_equals(sheet.cssRules.length, 0, "testSheet should initially be empty"); sheet.insertRule("@font-face { src: " + t.src + "}"); try { assert_equals(sheet.cssRules[0].style.getPropertyValue("src") != "", t.valid); if (t.valid && !t.dontcomparetech) { check_same_tech(sheet.cssRules[0].style.getPropertyValue("src"), t.src); } } finally { sheet.deleteRule(0); } }, "Check that src: " + t.src + " is " + (t.valid ? "valid" : "invalid")); } </script>