/// SPDX-License-Identifier: GPL-3.0-or-later
/// SPDX-FileCopyrightText: Copyright © 2016-2025 Tony Garnock-Jones <tonyg@leastfixedpoint.com>

import { expect } from 'vitest';
import { Value, is, preserves, Embeddable } from '@preserves/core';

declare module 'vitest' {
    interface Matchers<T = any> {
        isPreserves<V extends Embeddable>(expected: Value<V>): T;
        toThrowFilter(f: (e: Error) => boolean): T;
    }
}

expect.extend({
    isPreserves(actual, expected) {
        return is(actual, expected)
            ? { message: () => preserves`expected ${actual} not to be Preserves.is to ${expected}`,
                pass: true }
            : { message: () => preserves`expected ${actual} to be Preserves.is to ${expected}`,
                pass: false };
    },

    toThrowFilter(thunk, f) {
        try {
            thunk();
            return { message: () => preserves`expected an exception`, pass: false };
        } catch (e) {
            if (f(e)) {
                return { message: () => preserves`expected an exception not matching the filter`,
                         pass: true };
            } else {
                return { message: () => preserves`expected an exception matching the filter: ${(e as any)?.constructor?.name}`,
                         pass: false };
            }
        }
    }
});

export function compareHTML(nodes: ChildNode[], expected: string) {
    expect(nodes.map((n: any) => n.outerHTML ?? n.textContent).join('')).toEqual(expected);
}