firefish/packages/backend/test/misc/mock-resolver.ts

import Resolver from "../../src/remote/activitypub/resolver.js";
import { IObject } from "../../src/remote/activitypub/type.js";

type MockResponse = {
	type: string;
	content: string;
};

export class MockResolver extends Resolver {
	private _rs = new Map<string, MockResponse>();
	public async _register(
		uri: string,
		content: string | Record<string, any>,
		type = "application/activity+json",
	) {
		this._rs.set(uri, {
			type,
			content: typeof content === "string" ? content : JSON.stringify(content),
		});
	}

	public async resolve(value: string | IObject): Promise<IObject> {
		if (typeof value !== "string") return value;

		const r = this._rs.get(value);

		if (!r) {
			throw {
				name: "StatusError",
				statusCode: 404,
				message: "Not registed for mock",
			};
		}

		const object = JSON.parse(r.content);

		return object;
	}
}