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import * as CSSselect from "../src";
import { parseDOM } from "htmlparser2";
import { trueFunc, falseFunc } from "boolbase";
import type { Element } from "domhandler";
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[];
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 by function", () => {
it("in `is`", () => {
expect(CSSselect.is(dom, (elem) => elem.attribs.id === "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] as Element);
});
});
describe("unsatisfiable and universally valid selectors", () => {
it("in :not", () => {
let func = CSSselect._compileUnsafe(":not(*)");
expect(func).toBe(falseFunc);
func = CSSselect._compileUnsafe(":not(:nth-child(-1n-1))");
expect(func).toBe(trueFunc);
func = CSSselect._compileUnsafe(":not(:not(:not(*)))");
expect(func).toBe(falseFunc);
});
it("in :has", () => {
const matches = CSSselect.selectAll(":has(*)", [dom]);
expect(matches).toHaveLength(1);
expect(matches[0]).toBe(dom);
const func = CSSselect._compileUnsafe(":has(:nth-child(-1n-1))");
expect(func).toBe(falseFunc);
});
it("should skip unsatisfiable", () => {
const func = CSSselect._compileUnsafe("* :not(*) foo");
expect(func).toBe(falseFunc);
});
it("should promote universally valid", () => {
const func = CSSselect._compileUnsafe("*, foo");
expect(func).toBe(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);
});
});
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(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 be strict", () => {
const opts = { strict: true };
expect(() => CSSselect.compile(":checkbox", opts)).toThrow(Error);
expect(() => CSSselect.compile("[attr=val i]", opts)).toThrow(
Error
);
expect(() => CSSselect.compile("[attr!=val]", opts)).toThrow(Error);
expect(() => CSSselect.compile("[attr!=val i]", opts)).toThrow(
Error
);
expect(() => CSSselect.compile("foo < bar", opts)).toThrow(Error);
expect(() => CSSselect.compile(":not(:parent)", opts)).toThrow(
Error
);
expect(() => CSSselect.compile(":not(a > b)", opts)).toThrow(Error);
expect(() => CSSselect.compile(":not(a, b)", opts)).toThrow(Error);
});
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 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);
});
});
});
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