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|
import * as CSSselect from "../src";
import { parseDOM, parseDocument } from "htmlparser2";
import boolbase from "boolbase";
import * as DomUtils from "domutils";
import type { AnyNode, Element } from "domhandler";
import { SelectorType, AttributeAction } from "css-what";
import type { Adapter } from "../src/types.js";
const [dom] = parseDOM("<div id=foo><p>foo</p></div>") as Element[];
const [xmlDom] = parseDOM("<DiV id=foo><P>foo</P></DiV>", {
xmlMode: true,
}) as Element[];
const notYet = "not yet supported by css-select";
describe("API", () => {
describe("removes duplicates", () => {
it("between identical trees", () => {
expect(CSSselect.selectAll("div", [dom, dom])).toHaveLength(1);
});
it("between a superset and subset", () => {
expect(
CSSselect.selectAll("p", [dom, dom.children[0]])
).toHaveLength(1);
});
it("betweeen a subset and superset", () => {
expect(
CSSselect.selectAll("p", [dom.children[0], dom])
).toHaveLength(1);
});
});
describe("can be queried with more than a selector", () => {
it("function in `is`", () => {
expect(
CSSselect.is(dom, (elem) => elem.attribs["id"] === "foo")
).toBe(true);
});
it("parsed selector in `is`", () => {
expect(
CSSselect.is(dom, [
[
{
type: SelectorType.Attribute,
action: AttributeAction.Equals,
ignoreCase: false,
name: "id",
namespace: null,
value: "foo",
},
],
])
).toBe(true);
});
// Probably more cases should be added here
});
describe("selectAll", () => {
it("should query array elements directly when they have no parents", () => {
const divs = [dom];
expect(CSSselect.selectAll("div", divs)).toStrictEqual(divs);
});
it("should query array elements directly when they have parents", () => {
const ps = CSSselect.selectAll("p", [dom]);
expect(CSSselect.selectAll("p", ps)).toStrictEqual(ps);
});
it("should support pseudos led by a traversal (#111)", () => {
const [dom] = parseDOM(
'<div><div class="foo">a</div><div class="bar">b</div></div>'
) as Element[];
const a = CSSselect.selectAll(".foo:has(+.bar)", dom);
expect(a).toHaveLength(1);
expect(a[0]).toStrictEqual(dom.children[0]);
});
it("should accept document root nodes", () => {
const doc = parseDocument("<div id=foo><p>foo</p></div>");
expect(CSSselect.selectAll(":contains(foo)", doc)).toHaveLength(2);
});
it("should support scoped selections relative to the root (#709)", () => {
const doc = parseDocument(`
<div class="parent">
<div class="one"><p class="p1"></p></div>
<div class="two"><p class="p2"></p></div>
<div class="three"><p class="p3"></p></div>
</div>`);
const two = CSSselect.selectOne(".two", doc);
expect(
CSSselect.selectOne(".parent .two .p2", two, {
relativeSelector: false,
})
).toMatchObject({
attribs: { class: "p2" },
});
expect(
CSSselect.selectOne(".parent .two .p3", two, {
relativeSelector: false,
})
).toBeNull();
});
});
describe("errors", () => {
it("should throw with a pseudo-element", () => {
expect(() => CSSselect.compile("::after")).toThrow("not supported");
});
it("should throw an error if encountering a traversal-first selector with relative selectors disabled", () =>
expect(() =>
CSSselect.compile("> p", { relativeSelector: false })
).toThrow(
"Relative selectors are not allowed when the `relativeSelector` option is disabled"
));
it("should throw with a column combinator", () => {
expect(() => CSSselect.compile("foo || bar")).toThrow(notYet);
});
it("should throw with attribute namespace", () => {
expect(() => CSSselect.compile("[foo|bar]")).toThrow(notYet);
expect(() => CSSselect.compile("[|bar]")).not.toThrow();
expect(() => CSSselect.compile("[*|bar]")).toThrow(notYet);
});
it("should throw with tag namespace", () => {
expect(() => CSSselect.compile("foo|bar")).toThrow(notYet);
expect(() => CSSselect.compile("|bar")).toThrow(notYet);
expect(() => CSSselect.compile("*|bar")).toThrow(notYet);
});
it("should throw with universal selector", () => {
expect(() => CSSselect.compile("foo|*")).toThrow(notYet);
expect(() => CSSselect.compile("|*")).toThrow(notYet);
expect(() => CSSselect.compile("*|*")).not.toThrow();
});
it("should throw if parameter is supplied for pseudo", () => {
expect(() => CSSselect.compile(":any-link(test)")).toThrow(
"doesn't have any arguments"
);
expect(() => CSSselect.compile(":only-child(test)")).toThrow(
"doesn't have any arguments"
);
});
it("should throw if no parameter is supplied for pseudo", () => {
CSSselect.pseudos["foovalue"] = (elem, { adapter }, subselect) =>
adapter.getAttributeValue(elem, "foo") === subselect;
expect(() => CSSselect.compile(":foovalue")).toThrow(
"requires an argument"
);
delete CSSselect.pseudos["foovalue"];
});
it("should throw if parameter is supplied for user-provided pseudo", () =>
expect(() =>
CSSselect.compile(":foovalue(boo)", {
pseudos: { foovalue: "tag" },
})
).toThrow("doesn't have any arguments"));
it("should throw if no parameter is supplied for user-provided pseudo", () =>
expect(() =>
CSSselect.compile(":foovalue", {
pseudos: {
foovalue(_el, data) {
return data != null;
},
},
})
).toThrow("requires an argument"));
});
describe("unsatisfiable and universally valid selectors", () => {
it("in :not", () => {
expect(CSSselect._compileUnsafe(":not(*)")).toBe(
boolbase.falseFunc
);
expect(CSSselect._compileUnsafe(":not(:nth-child(-1n-1))")).toBe(
boolbase.trueFunc
);
expect(CSSselect._compileUnsafe(":not(:not(:not(*)))")).toBe(
boolbase.falseFunc
);
});
it("in :has", () => {
const matches = CSSselect.selectAll(":has(*)", [dom]);
expect(matches).toHaveLength(1);
expect(matches[0]).toBe(dom);
expect(CSSselect._compileUnsafe(":has(:nth-child(-1n-1))")).toBe(
boolbase.falseFunc
);
const matches2 = CSSselect.selectAll(
"p:has(+ *)",
parseDOM("<p><p>")
);
expect(matches2).toHaveLength(1);
expect(matches2[0]).toHaveProperty("tagName", "p");
});
it("in :is", () => {
expect(CSSselect._compileUnsafe(":is(*)")).toBe(boolbase.trueFunc);
expect(CSSselect._compileUnsafe(":is(:nth-child(-1n-1))")).toBe(
boolbase.falseFunc
);
expect(CSSselect._compileUnsafe(":is(:not(:not(*)))")).toBe(
boolbase.trueFunc
);
expect(CSSselect._compileUnsafe(":is(*, :scope)")).toBe(
boolbase.trueFunc
);
});
it("should skip unsatisfiable", () =>
expect(CSSselect._compileUnsafe("* :not(*) foo")).toBe(
boolbase.falseFunc
));
it("should promote universally valid", () =>
expect(CSSselect._compileUnsafe("*, foo")).toBe(boolbase.trueFunc));
});
describe(":matches", () => {
it("should select multiple elements", () => {
let matches = CSSselect.selectAll(":matches(p, div)", [dom]);
expect(matches).toHaveLength(2);
matches = CSSselect.selectAll(":matches(div, :not(div))", [dom]);
expect(matches).toHaveLength(2);
matches = CSSselect.selectAll(
":matches(boo, baa, tag, div, foo, bar, baz)",
[dom]
);
expect(matches).toHaveLength(1);
expect(matches[0]).toBe(dom);
});
it("should support traversals", () => {
let matches = CSSselect.selectAll(":matches(div p)", [dom]);
expect(matches).toHaveLength(1);
expect(matches[0].name).toBe("p");
matches = CSSselect.selectAll(":matches(div > p)", [dom]);
expect(matches).toHaveLength(1);
expect(matches[0].name).toBe("p");
matches = CSSselect.selectAll(":matches(p < div)", [dom]);
expect(matches).toHaveLength(1);
expect(matches[0].name).toBe("div");
matches = CSSselect.selectAll(":matches(> p)", [dom]);
expect(matches).toHaveLength(1);
expect(matches[0].name).toBe("p");
matches = CSSselect.selectAll("div:has(:is(:scope p))", [dom]);
expect(matches).toHaveLength(1);
expect(matches[0].name).toBe("div");
const [multiLevelDom] = parseDOM("<a><b><c><d>") as Element[];
matches = CSSselect.selectAll(":is(* c)", multiLevelDom);
expect(matches).toHaveLength(1);
expect(matches[0].name).toBe("c");
});
it("should support alias :is", () => {
let matches = CSSselect.selectAll(":is(p, div)", [dom]);
expect(matches).toHaveLength(2);
matches = CSSselect.selectAll(":is(div, :not(div))", [dom]);
expect(matches).toHaveLength(2);
matches = CSSselect.selectAll(
":is(boo, baa, tag, div, foo, bar, baz)",
[dom]
);
expect(matches).toHaveLength(1);
expect(matches[0]).toBe(dom);
});
it("should support alias :where", () => {
let matches = CSSselect.selectAll(":where(p, div)", [dom]);
expect(matches).toHaveLength(2);
matches = CSSselect.selectAll(":where(div, :not(div))", [dom]);
expect(matches).toHaveLength(2);
matches = CSSselect.selectAll(
":where(boo, baa, tag, div, foo, bar, baz)",
[dom]
);
expect(matches).toHaveLength(1);
expect(matches[0]).toBe(dom);
});
});
describe("parent selector (<)", () => {
it("should select the right element", () => {
const matches = CSSselect.selectAll("p < div", [dom]);
expect(matches).toHaveLength(1);
expect(matches[0]).toBe(dom);
});
it("should not select nodes without children", () => {
const matches = CSSselect.selectAll("p < div", [dom]);
expect(matches).toStrictEqual(CSSselect.selectAll("* < *", [dom]));
});
});
describe("selectOne", () => {
it("should select elements in traversal order", () => {
expect(CSSselect.selectOne("p", [dom])).toBe(dom.children[0]);
expect(CSSselect.selectOne(":contains(foo)", [dom])).toBe(dom);
});
it("should take shortcuts when applicable", () => {
let match = CSSselect.selectOne(boolbase.falseFunc, {
get length() {
throw new Error("Did not take shortcut");
},
});
expect(match).toBeNull();
match = CSSselect.selectOne("*", []);
expect(match).toBeNull();
});
it("should properly handle root elements", () => {
expect(CSSselect.selectOne("div:root", [dom])).toBe(dom);
expect(CSSselect.selectOne("* > div", [dom])).toBeNull();
});
});
describe("options", () => {
const opts = { xmlMode: true };
it("should recognize xmlMode in :has and :not", () => {
expect(CSSselect.is(xmlDom, "DiV:has(P)", opts)).toBe(true);
expect(CSSselect.is(xmlDom, "DiV:not(div)", opts)).toBe(true);
expect(
CSSselect.is(xmlDom.children[0], "DiV:has(P) :not(p)", opts)
).toBe(true);
});
it("should recognize contexts", () => {
const div = CSSselect.selectAll("div", [dom]);
const p = CSSselect.selectAll("p", [dom]);
expect(CSSselect.selectOne("div", div, { context: div })).toBe(
div[0]
);
expect(CSSselect.selectOne("div", div, { context: p })).toBe(null);
expect(
CSSselect.selectAll("p", div, { context: div })
).toStrictEqual(p);
});
it("should not crash when siblings repeat", () => {
const dom = parseDOM(`<div></div>`.repeat(51)) as Element[];
expect(
CSSselect.selectAll("+div", dom, { context: dom })
).toHaveLength(50);
});
it("should cache results by default", () => {
const [dom] = parseDOM(
'<div id="foo"><p>bar</p></div>'
) as Element[];
const query = CSSselect.compile("#bar p");
expect(CSSselect.selectAll(query, [dom])).toHaveLength(0);
dom.attribs["id"] = "bar";
// The query should be cached and the changed attribute should be ignored.
expect(CSSselect.selectAll(query, [dom])).toHaveLength(0);
});
it("should skip cacheing results if asked to", () => {
const [dom] = parseDOM(
'<div id="foo"><p>bar</p></div>'
) as Element[];
const query = CSSselect.compile("#bar p", { cacheResults: false });
expect(CSSselect.selectAll(query, [dom])).toHaveLength(0);
dom.attribs["id"] = "bar";
// The query should not be cached, the changed attribute should be picked up.
expect(CSSselect.selectAll(query, [dom])).toHaveLength(1);
});
it("should pass options to sub-selectors", () => {
expect(
CSSselect.selectAll("div:is(DiV#FOO):not([ID]):foo", [dom], {
xmlMode: true,
lowerCaseTags: true,
quirksMode: true,
pseudos: { foo: "#fOO" },
})
).toHaveLength(1);
});
});
describe("optional adapter methods", () => {
it("should support prevElementSibling", () => {
const adapter: Adapter<AnyNode, Element> = { ...DomUtils };
delete adapter.prevElementSibling;
const dom = parseDOM(
`${"<p>foo".repeat(10)}<div>bar</div>`
) as Element[];
expect(
CSSselect.selectAll("p + div", dom, { adapter })
).toStrictEqual(CSSselect.selectAll("p + div", dom));
});
it("should support isHovered", () => {
const dom = parseDOM(`${"<p>foo".repeat(10)}`) as Element[];
const adapter = {
...DomUtils,
isHovered: (el: Element) => el === dom[dom.length - 1],
};
const selection = CSSselect.selectAll("p:hover", dom, { adapter });
expect(selection).toHaveLength(1);
expect(selection[0]).toBe(dom[dom.length - 1]);
});
it("should not match any elements if `isHovered` is not defined", () => {
const dom = parseDOM(`${"<p>foo".repeat(10)}`);
expect(CSSselect.selectAll("p:hover", dom)).toHaveLength(0);
});
});
});
|
