<!DOCTYPE HTML>
<meta charset="utf-8">
<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api/#dom-css-registerproperty" />
<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api/#supported-syntax-strings" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test_count = 0;

function assert_valid(syntax, initialValue) {
    // No actual assertions, this just shouldn't throw
    test(function() {
        var name = '--syntax-test-' + (test_count++);
        CSS.registerProperty({name: name, syntax: syntax, initialValue: initialValue, inherits: false});
    }, "syntax:'" + syntax + "', initialValue:'" + initialValue + "' is valid");
}

function assert_invalid(syntax, initialValue) {
    test(function(){
        var name = '--syntax-test-' + (test_count++);
        assert_throws_dom("SyntaxError",
            () => CSS.registerProperty({name: name, syntax: syntax, initialValue: initialValue, inherits: false}));
    }, "syntax:'" + syntax + "', initialValue:'" + initialValue + "' is invalid");
}

assert_valid("*", "a");
assert_valid(" * ", "b");
assert_valid("<length>", "2px");
assert_valid(" <number>", "5");
assert_valid("<percentage> ", "10%");
assert_valid("<color>+", "red");
assert_valid(" <length>+ | <percentage>", "2px 8px");
assert_valid(" <length>+ | <color>#", "red, blue");
assert_valid("<length>|<percentage>|<length-percentage>", "2px"); // Valid but silly
assert_valid("<color> | <image> | <url> | <integer> | <angle>", "red");
assert_valid("<time> | <resolution> | <transform-list> | <custom-ident>", "red");
assert_valid("\t<color>\n|   foo", "foo");

assert_valid("*", ":> hello");
assert_valid("*", "([ brackets ]) { yay (??)}");
assert_valid("*", "yep 'this is valid too'");
assert_valid("*", "unmatched opening bracket is valid :(");
assert_valid("*", '"');
assert_valid("*", "default");

assert_valid("<length>", "0");
assert_valid("<length>", "10px /*:)*/");
assert_valid("<length>", " calc(-2px)");
assert_valid("<length>", "calc(2px*4 + 10px)");
assert_valid("<length>", "7.1e-4cm");
assert_valid("<length>", "calc(7in - 12px)");
assert_valid("<length>+", "2px 7px calc(8px)");
assert_valid("<length>#", "2px, 7px, calc(8px)");
assert_valid("<percentage>", "-9.3e3%");
assert_valid("<length-percentage>", "-54%");
assert_valid("<length-percentage>", "0");
assert_valid("<length-percentage>", "calc(-11px + 10.4%)");
assert_valid("<length>", "10vmin");
assert_valid("<percentage> | <length>+", "calc(100vh - 10px) 30px");

assert_valid("<number>", "-109");
assert_valid("<number>", "2.3e4");
assert_valid("<number>", "calc(1 / 2)");
assert_valid("<integer>", "-109");
assert_valid("<integer>", "19");
assert_valid("<integer>", "calc(1)");
assert_valid("<integer>", "calc(1 + 2)");
assert_valid("<integer>", "calc(3.1415)");
assert_valid("<integer>", "calc(3.1415 + 3.1415)");

assert_valid("<angle>", "10deg");
assert_valid("<angle>", "20.5rad");
assert_valid("<angle>", "calc(50grad + 3.14159rad)");
assert_valid("<time>", "2s");
assert_valid("<time>", "calc(2s - 9ms)");
assert_valid("<resolution>", "10dpi");
assert_valid("<resolution>", "3dPpX");
assert_valid("<transform-function>", "translateX(2px)");
assert_valid("<transform-function>|<integer>", "5");
assert_valid("<transform-function>|<integer>", "scale(2)");
assert_valid("<transform-function>+", "translateX(2px) rotate(42deg)");
assert_valid("<transform-list>", "scale(2)");
assert_valid("<transform-list>", "translateX(2px) rotate(20deg)");

assert_valid("<color>", "rgb(12, 34, 56)");
assert_valid("<color>", "lightgoldenrodyellow");
assert_valid("<image>", "url(a)");
assert_valid("<image>", "linear-gradient(yellow, blue)");
assert_valid("<url>", "url(a)");

assert_valid("<color>+", "yellow blue");
assert_valid("<color>+ | <color>", "yellow blue");
assert_valid("<color> | <color>+", "yellow blue");
assert_valid("<color># | <color>", "yellow, blue");
assert_valid("<color> | <color>#", "yellow, blue");
assert_valid("<color># | <color>+", "yellow blue");
assert_valid("<color>+ | <color>#", "yellow, blue");
assert_valid("<color>+ | yellow", "yellow blue");
assert_valid("yellow", "yellow");
assert_valid("yellow | <color>+", "yellow blue");
assert_valid("<color># | yellow", "yellow, blue");
assert_valid("yellow | <color>#", "yellow, blue");
assert_valid("<transform-list> | <transform-function> ", "scale(2) rotate(90deg)");
assert_valid("<transform-function> | <transform-list>", "scale(2) rotate(90deg)");
assert_valid("<transform-list> | <transform-function>+ ", "scale(2) rotate(90deg)");
assert_valid("<transform-function>+ | <transform-list>", "scale(2) rotate(90deg)");
assert_valid("<transform-list> | <transform-function># ", "scale(2) rotate(90deg)");
assert_valid("<transform-function># | <transform-list>", "scale(2) rotate(90deg)");
assert_valid("<transform-list> | <transform-function># ", "scale(2), rotate(90deg)");
assert_valid("<transform-function># | <transform-list>", "scale(2), rotate(90deg)");
assert_valid("<integer>+ | <percentage>+ | <length>+ ", "1");
assert_valid("<integer>+ | <percentage>+ | <length>+ ", "1 1");
assert_valid("<integer>+ | <percentage>+ | <length>+ ", "1%");
assert_valid("<integer>+ | <percentage>+ | <length>+ ", "1% 1%");
assert_valid("<integer>+ | <percentage>+ | <length>+ ", "1px");
assert_valid("<integer>+ | <percentage>+ | <length>+ ", "1px 1px");

assert_valid("banana", "banana");
assert_valid("bAnAnA", "bAnAnA");
assert_valid("ba-na-nya", "ba-na-nya");
assert_valid("banana", "banan\\61");
assert_valid("banan\\61", "banana");
assert_valid("<custom-ident>", "banan\\61");
assert_valid("big | bigger | BIGGER", "bigger");
assert_valid("foo+|bar", "foo foo foo");

assert_valid("banana\t", "banana");
assert_valid("\nbanana\r\n", "banana");
assert_valid("ba\f\n|\tna\r|nya", "nya");

assert_valid(null, "null");
assert_valid(undefined, "undefined");
assert_valid(["array"], "array");

assert_valid("\\1F914", "🤔");
assert_valid("hmm\\1F914", "hmm🤔");
assert_valid("\\1F914hmm", "🤔hmm");
assert_valid("\\1F914 hmm", "🤔hmm");
assert_valid("\\1F914\\1F914", "🤔🤔");

// Invalid syntax
assert_invalid("banana,nya", "banana");
assert_invalid("<\\6c ength>", "10px");
assert_invalid("<banana>", "banana");
assert_invalid("<Number>", "10");
assert_invalid("<length", "10px");
assert_invalid("<LENGTH>", "10px");
assert_invalid("< length>", "10px");
assert_invalid("<length >", "10px");
assert_invalid("<length> +", "10px");
assert_invalid("<transform-list>+", "scale(2)");
assert_invalid("<transform-list>#", "scale(2)");

assert_invalid("<length>++", "10px");
assert_invalid("<length>##", "10px");
assert_invalid("<length>+#", "10px");
assert_invalid("<length>#+", "10px");
assert_invalid("<length> | *", "10px");
assert_invalid("*|banana", "banana");
assert_invalid("|banana", "banana");
assert_invalid("*+", "banana");
assert_invalid("|", "banana");
assert_invalid(" |", "banana");
assert_invalid("||", "banana");
assert_invalid("foo bar", "foo bar");
assert_invalid("foo foo foo", "foo foo foo");
assert_invalid("foo § bar", "foo § bar");
assert_invalid("foo \\1F914 bar", "foo \\1F914 bar");
assert_invalid("<length> <number>", "0px 0");
assert_invalid("<length> <length> <length>", "0px 0px 0px");

assert_invalid("<integer>+ | <percentage>+ | <length>+ ", "1 1%");
assert_invalid("<integer>+ | <percentage>+ | <length>+ ", "1% 1");
assert_invalid("<integer>+ | <percentage>+ | <length>+ ", "1px 1");
assert_invalid("<integer>+ | <percentage>+ | <length>+ ", "1 1px");
assert_invalid("<integer>+ | <percentage>+ | <length>+ ", "1px 1%");
assert_invalid("<integer>+ | <percentage>+ | <length>+ ", "1% 1px");

assert_invalid("initial", "initial");
assert_invalid("inherit", "inherit");
assert_invalid("unset", "unset");
assert_invalid("revert", "revert");
assert_invalid("revert-layer", "revert-layer");
assert_invalid("default", "default");
assert_invalid("<length>|initial", "10px");
assert_invalid("<length>|INHERIT", "10px");
assert_invalid("<percentage>|unsEt", "2%");
assert_invalid("<color>|REVert", "red");
assert_invalid("<integer>|deFAUlt", "1");

// Invalid initialValue
// The 5 tests that follow are not clearly backed by the specification,
// but they're probably a good idea and we should change the spec. See
// https://github.com/w3c/css-houdini-drafts/issues/1076 .
assert_invalid("*", "initial");
assert_invalid("*", "inherit");
assert_invalid("*", "unset");
assert_invalid("*", "revert");
assert_invalid("*", "revert-layer");
// ... end possibly-invalid tests.
assert_invalid("<custom-ident>", "initial");
assert_invalid("<custom-ident>", "inherit");
assert_invalid("<custom-ident>", "unset");
assert_invalid("<custom-ident>", "revert");
assert_invalid("<custom-ident>", "revert-layer");
assert_invalid("<custom-ident>", "default");
assert_invalid("<custom-ident>+", "foo initial bar");
assert_invalid("<custom-ident>+", "foo inherit bar");
assert_invalid("<custom-ident>+", "foo unset bar");
assert_invalid("<custom-ident>+", "foo revert bar");
assert_invalid("<custom-ident>+", "foo revert-layer bar");
assert_invalid("<custom-ident>+", "foo default bar");

assert_invalid("*", ")");
assert_invalid("*", "([)]");
assert_invalid("*", "whee!");
assert_invalid("*", '"\n');
assert_invalid("*", "url(moo '')");
assert_invalid("*", "semi;colon");
assert_invalid("*", "var(invalid var ref)");
assert_invalid("*", "var(--foo)");

assert_invalid("banana", "bAnAnA");
assert_invalid("<length>", "var(--moo)");
assert_invalid("<length>", "10");
assert_invalid("<length>", "10%");
assert_invalid("<length>", "calc(5px + 10%)");
assert_invalid("<length>", "calc(5px * 3px / 6px)");
assert_invalid("<length>", "10em");
assert_invalid("<length>", "calc(4px + 3em)");
assert_invalid("<length>", "calc(4px + calc(8 * 2em))");
assert_invalid("<length>+", "calc(2ex + 16px)");
assert_invalid("<length>+", "10px calc(20px + 4rem)");
assert_invalid("<length>+", "");
assert_invalid("<length>#", "");
assert_invalid("<length>", "10px;");
assert_invalid("<length-percentage>", "calc(2px + 10% + 7ex)");
assert_invalid("<percentage>", "0");
assert_invalid("<integer>", "1.0");
assert_invalid("<integer>", "1e0");
assert_invalid("<number>|foo", "foo var(--foo, bla)");
assert_invalid("Foo | bar", "foo");
assert_invalid("Foo | bar", "Bar");

assert_invalid("<angle>", "0");
assert_invalid("<angle>", "10%");
assert_invalid("<time>", "2px");
assert_invalid("<resolution>", "10");

// "The allowed range of <resolution> values always excludes negative values"
// https://www.w3.org/TR/css-values-4/#resolution-value
assert_invalid("<resolution>", "-5.3dpcm");

assert_invalid("<transform-function>", "scale()");
assert_invalid("<transform-list>", "scale()");
assert_invalid("<transform-list>+", "translateX(2px) rotate(20deg)");
assert_invalid("<color>", "fancy-looking");
assert_invalid("<image>", "banana.png");
assert_invalid("<url>", "banana.png");
</script>
