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test: Adopt CSS Selector parsing tests from WPT
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‎src/wpt.spec.ts‎

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/**
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* @fileoverview CSS Selector parsing tests from WPT
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* @see https://github.com/web-platform-tests/wpt/tree/0bb883967c888261a8372923fd61eb5ad14305b2/css/selectors/parsing
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* @license BSD-3-Clause (https://github.com/web-platform-tests/wpt/blob/master/LICENSE.md)
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*/
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import { parse, stringify } from ".";
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function test_valid_selector(
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selector: string,
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serialized: string | string[] = selector
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) {
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const result = stringify(parse(selector));
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if (Array.isArray(serialized)) {
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// Should be a part of the array
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expect(serialized).toContain(result);
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} else {
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expect(result).toStrictEqual(serialized);
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}
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}
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function test_invalid_selector(selector: string) {
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expect(() => parse(selector)).toThrow(Error);
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}
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describe("Web Platform Tests", () => {
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it("Attribute selectors", () => {
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// Attribute presence and value selectors
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test_valid_selector("[att]");
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test_valid_selector("[att=val]", '[att="val"]');
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test_valid_selector("[att~=val]", '[att~="val"]');
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test_valid_selector("[att|=val]", '[att|="val"]');
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test_valid_selector("h1[title]");
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test_valid_selector("span[class='example']", 'span[class="example"]');
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test_valid_selector("a[hreflang=fr]", 'a[hreflang="fr"]');
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test_valid_selector("a[hreflang|='en']", 'a[hreflang|="en"]');
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// Substring matching attribute selectors
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test_valid_selector("[att^=val]", '[att^="val"]');
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test_valid_selector("[att$=val]", '[att$="val"]');
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test_valid_selector("[att*=val]", '[att*="val"]');
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test_valid_selector('object[type^="image/"]');
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test_valid_selector('a[href$=".html"]');
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test_valid_selector('p[title*="hello"]');
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// From Attribute selectors and namespaces examples in spec:
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test_valid_selector("[*|att]");
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test_valid_selector("[|att]", "[att]");
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});
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it("Child combinators", () => {
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test_valid_selector("body > p");
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test_valid_selector("div ol>li p", "div ol > li p");
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});
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it("Class selectors", () => {
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test_valid_selector("*.pastoral", ["*.pastoral", ".pastoral"]);
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test_valid_selector(".pastoral", ["*.pastoral", ".pastoral"]);
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test_valid_selector("h1.pastoral");
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test_valid_selector("p.pastoral.marine");
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});
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it("Descendant combinator", () => {
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test_valid_selector("h1 em");
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test_valid_selector("div * p");
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test_valid_selector("div p *[href]", ["div p *[href]", "div p [href]"]);
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});
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it(":focus-visible pseudo-class", () => {
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test_valid_selector(":focus-visible");
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test_valid_selector("a:focus-visible");
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test_valid_selector(":focus:not(:focus-visible)");
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});
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it("The relational pseudo-class", () => {
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test_valid_selector(":has(a)");
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test_valid_selector(":has(#a)");
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test_valid_selector(":has(.a)");
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test_valid_selector(":has([a])");
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test_valid_selector(':has([a="b"])');
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test_valid_selector(':has([a|="b"])');
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test_valid_selector(":has(:hover)");
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test_valid_selector("*:has(.a)", ["*:has(.a)", ":has(.a)"]);
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test_valid_selector(".a:has(.b)");
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test_valid_selector(".a:has(> .b)");
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test_valid_selector(".a:has(~ .b)");
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test_valid_selector(".a:has(+ .b)");
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test_valid_selector(".a:has(.b) .c");
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test_valid_selector(".a .b:has(.c)");
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test_valid_selector(".a .b:has(.c .d)");
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test_valid_selector(".a .b:has(.c .d) .e");
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test_valid_selector(".a:has(.b:has(.c))");
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test_valid_selector(".a:has(.b:is(.c .d))");
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test_valid_selector(".a:has(.b:is(.c:has(.d) .e))");
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test_valid_selector(".a:is(.b:has(.c) .d)");
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test_valid_selector(".a:not(:has(.b))");
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test_valid_selector(".a:has(:not(.b))");
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test_valid_selector(".a:has(.b):has(.c)");
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test_valid_selector("*|*:has(*)", ":has(*)");
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test_valid_selector(":has(*|*)");
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test_invalid_selector(".a:has()");
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});
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it("ID selectors", () => {
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test_valid_selector("h1#chapter1");
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test_valid_selector("#chapter1");
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test_valid_selector("*#z98y", ["*#z98y", "#z98y"]);
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});
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it("The Matches-Any Pseudo-class: ':is()'", () => {
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test_valid_selector(
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":is(ul,ol,.list) > [hidden]",
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":is(ul, ol, .list) > [hidden]"
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);
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test_valid_selector(":is(:hover,:focus)", ":is(:hover, :focus)");
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test_valid_selector("a:is(:not(:hover))");
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test_valid_selector(":is(#a)");
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test_valid_selector(".a.b ~ :is(.c.d ~ .e.f)");
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test_valid_selector(".a.b ~ .c.d:is(span.e + .f, .g.h > .i.j .k)");
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});
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it("The negation pseudo-class", () => {
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test_valid_selector("button:not([disabled])");
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test_valid_selector("*:not(foo)", ["*:not(foo)", ":not(foo)"]);
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test_valid_selector(":not(:link):not(:visited)");
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test_valid_selector("*|*:not(*)", ":not(*)");
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test_valid_selector(":not(:hover)");
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test_valid_selector(":not(*|*)");
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test_valid_selector("foo:not(bar)");
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test_valid_selector(":not(:not(foo))");
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test_valid_selector(":not(.a .b)");
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test_valid_selector(":not(.a + .b)");
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test_valid_selector(":not(.a .b ~ c)");
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test_valid_selector(":not(span.a, div.b)");
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test_valid_selector(":not(.a .b ~ c, .d .e)");
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test_valid_selector(":not(:host)");
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test_valid_selector(":not(:host(.a))");
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test_valid_selector(":host(:not(.a))");
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test_valid_selector(":not(:host(:not(.a)))");
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test_valid_selector(
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":not([disabled][selected])",
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":not([disabled][selected])"
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);
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test_valid_selector(
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":not([disabled],[selected])",
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":not([disabled], [selected])"
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);
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test_invalid_selector(":not()");
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test_invalid_selector(":not(:not())");
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});
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it("Sibling combinators", () => {
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test_valid_selector("math + p");
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test_valid_selector("h1.opener + h2");
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test_valid_selector("h1 ~ pre");
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});
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it("Universal selector", () => {
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test_valid_selector("*");
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test_valid_selector("div :first-child", [
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"div *:first-child",
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"div :first-child",
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]);
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test_valid_selector("div *:first-child", [
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"div *:first-child",
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"div :first-child",
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]);
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});
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it("The Specificity-adjustment Pseudo-class: ':where()'", () => {
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test_valid_selector(
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":where(ul,ol,.list) > [hidden]",
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":where(ul, ol, .list) > [hidden]"
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);
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test_valid_selector(":where(:hover,:focus)", ":where(:hover, :focus)");
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test_valid_selector("a:where(:not(:hover))");
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test_valid_selector(":where(#a)");
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test_valid_selector(".a.b ~ :where(.c.d ~ .e.f)");
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test_valid_selector(".a.b ~ .c.d:where(span.e + .f, .g.h > .i.j .k)");
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});
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});

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