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[functions] Add WPT for @function prelude parsing #50138

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Merged
chromium-wpt-export-bot merged 1 commit into from
Jan 20, 2025
Merged

[functions] Add WPT for @function prelude parsing #50138

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108 changes: 108 additions & 0 deletions css/css-mixins/at-function-parsing.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,108 @@
<!DOCTYPE html>
<title>Custom Functions: Prelude Parsing</title>
<link rel="help" href="https://drafts.csswg.org/css-mixins-1/#function-rule">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
function test_valid_prelude(rule_without_block) {
test(() => {
let s = new CSSStyleSheet();
s.replaceSync(`${rule_without_block} {}`);
assert_equals(s.cssRules.length, 1);
}, `${rule_without_block} is valid`);
}

function test_invalid_prelude(rule_without_block) {
test(() => {
let s = new CSSStyleSheet();
s.replaceSync(`${rule_without_block} {}`);
assert_equals(s.cssRules.length, 0);
}, `${rule_without_block} is invalid`);
}

test_valid_prelude('@function --foo()');
test_valid_prelude('@function --foo( )');
test_valid_prelude('@function --foo(--x)');
test_valid_prelude('@function --foo( --x )');

test_invalid_prelude('@function --foo ()');
test_invalid_prelude('@function --foo (--x)');

// All single <syntax-component> types.
test_valid_prelude('@function --foo(--x auto)');
test_valid_prelude('@function --foo(--x <angle>)');
test_valid_prelude('@function --foo(--x <color>)');
test_valid_prelude('@function --foo(--x <custom-ident>)');
test_valid_prelude('@function --foo(--x <image>)');
test_valid_prelude('@function --foo(--x <integer>)');
test_valid_prelude('@function --foo(--x <length>)');
test_valid_prelude('@function --foo(--x <length-percentage>)');
test_valid_prelude('@function --foo(--x <number>)');
test_valid_prelude('@function --foo(--x <percentage>)');
test_valid_prelude('@function --foo(--x <resolution>)');
test_valid_prelude('@function --foo(--x <string>)');
test_valid_prelude('@function --foo(--x <time>)');
test_valid_prelude('@function --foo(--x <url>)');
test_valid_prelude('@function --foo(--x <transform-function>)');
test_valid_prelude('@function --foo(--x <transform-list>)');

test_valid_prelude('@function --foo(--x type(auto))');
test_valid_prelude('@function --foo(--x type(<length>))');
test_valid_prelude('@function --foo(--x type(<length> | auto))');
test_valid_prelude('@function --foo(--x type(none | auto))');
test_valid_prelude('@function --foo(--x type(*))');

// Multiple parameters.
test_valid_prelude('@function --foo(--x, --y)');
test_valid_prelude('@function --foo(--x, --y, --z)');
test_valid_prelude('@function --foo(--x <length>, --y, --z)');
test_valid_prelude('@function --foo(--x, --y <number>, --z <angle>)');

// Defaults.
test_valid_prelude('@function --foo(--x : 10px)');
test_valid_prelude('@function --foo(--x <length>: 10px)');
test_valid_prelude('@function --foo(--x <length>: 10px, --y)');
test_valid_prelude('@function --foo(--x, --y <length>: 10px)');
test_valid_prelude('@function --foo(--x type(<length> | auto): auto)');
// The value does not have to match the type during @function parsing:
test_valid_prelude('@function --foo(--x <angle>: 10px)');

test_invalid_prelude('@function --foo(--x: 10px !important)');

// Lists.
test_valid_prelude('@function --foo(--x <length>#)');
test_valid_prelude('@function --foo(--x <length>+)');
test_valid_prelude('@function --foo(--x type(<length>+))');
test_valid_prelude('@function --foo(--x <transform-function>#)');
test_valid_prelude('@function --foo(--x <transform-function>+)');
// <transform-list> is special: a multiplier cannot follow it.
test_invalid_prelude('@function --foo(--x <transform-list>#)');
test_invalid_prelude('@function --foo(--x <transform-list>+)');

test_invalid_prelude('@function --foo(--x *)');
test_invalid_prelude('@function --foo(--x !)');
test_invalid_prelude('@function --foo(--x 50px)');
test_invalid_prelude('@function --foo(--x <length> | auto)');
test_invalid_prelude('@function --foo(--x none | auto)');
test_invalid_prelude('@function --foo(--x <dino>)');

// Return value types.
test_valid_prelude('@function --foo(--x) returns type(*)');
test_valid_prelude('@function --foo(--x) returns <length>');
test_valid_prelude('@function --foo(--x) returns <length>+');
test_valid_prelude('@function --foo(--x) returns type(<length>)');
test_valid_prelude('@function --foo(--x) returns type(<length> | auto)');
test_valid_prelude('@function --foo(--x) returns type(foo | bar)');

test_invalid_prelude('@function --foo(--x) !');
test_invalid_prelude('@function --foo(--x) length');
test_invalid_prelude('@function --foo(--x) returns');
test_invalid_prelude('@function --foo(--x) returns ');
test_invalid_prelude('@function --foo(--x) returns *');
test_invalid_prelude('@function --foo(--x) returns <transform-list>#');
test_invalid_prelude('@function --foo(--x) returns <transform-list>+');
test_invalid_prelude('@function --foo(--x) returns auto | none');
test_invalid_prelude('@function --foo(--x): <length>');
test_invalid_prelude('@function --foo(--x): length');
test_invalid_prelude('@function --foo(--x) returneth <length>');
</script>
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