/**
 * extensibility.test.ts — the registry extensibility claim (task 14).
 *
 * Proves a NEW check added as a file in `src/checks/` plus one `registerCheck()`
 * entry yields a working `/pygienium-<name>` command with ZERO `index.ts`
 * command-wiring changes. The witness is `src/checks/noop.ts`: importing it
 * self-registers the `noop` check, after which the generic command-binding path
 * (`registerPygieniumCommands`, the exact function `index.ts` calls) exposes
 * `/pygienium-noop` and `/pygienium-help` lists it.
 */
import { describe, expect, it } from "bun:test";
import "../src/checks/noop.js";
import { getCheck, getAllChecks } from "../src/checks/registry.js";
import { registerPygieniumCommands } from "../src/commands.js";
import { buildPygieniumHelpLines } from "../src/help.js";

describe("registry extensibility (task 14)", () => {
	it("the noop check file self-registers (no index.ts edits)", () => {
		// Importing checks/noop.ts ran its top-level registerCheck(noopCheck).
		expect(getCheck("noop")).toBeDefined();
		expect(getAllChecks().some((c) => c.name === "noop")).toBe(true);
	});

	it("registerPygieniumCommands exposes /pygienium-noop (zero wiring)", () => {
		const names: string[] = [];
		registerPygieniumCommands((name) => names.push(name));
		expect(names).toContain("pygienium-noop");
		// And the operator commands are still wired.
		expect(names).toContain("pygienium-help");
		expect(names).toContain("pygienium-all");
	});

	it("/pygienium-help lists the noop check", () => {
		const text = buildPygieniumHelpLines().join("\n");
		expect(text).toContain("/pygienium-noop");
		expect(text).toContain(getCheck("noop")!.description);
	});
});