import { describe, expect, it } from "bun:test";
import { dedupeParseErrors, formatParseErrors } from "@oh-my-pi/pi-coding-agent/tools/render-utils";

describe("parse error formatting", () => {
	it("deduplicates parse errors while preserving order", () => {
		const errors = [
			"foo.ts: parse error (syntax tree contains error nodes)",
			"foo.ts: parse error (syntax tree contains error nodes)",
			"bar.ts: parse error (syntax tree contains error nodes)",
			"foo.ts: parse error (syntax tree contains error nodes)",
		];

		expect(dedupeParseErrors(errors)).toEqual([
			"foo.ts: parse error (syntax tree contains error nodes)",
			"bar.ts: parse error (syntax tree contains error nodes)",
		]);
	});

	it("formats deduplicated parse errors", () => {
		const formatted = formatParseErrors([
			"foo.ts: parse error (syntax tree contains error nodes)",
			"foo.ts: parse error (syntax tree contains error nodes)",
			"bar.ts: parse error (syntax tree contains error nodes)",
		]);

		expect(formatted).toEqual([
			"Parse issues:",
			"- foo.ts: parse error (syntax tree contains error nodes)",
			"- bar.ts: parse error (syntax tree contains error nodes)",
		]);
	});
});