import { describe, expect, it } from "vitest";
import { findMatches, wrapIndex } from "#lib/components/lines/search.ts";

describe("findMatches", () => {
	it("finds every case-insensitive hit with one-based lines", () => {
		expect(findMatches(["Foo foo", "bar", "xfoo"], "foo")).toEqual([
			{ line: 1, start: 0, end: 3 },
			{ line: 1, start: 4, end: 7 },
			{ line: 3, start: 1, end: 4 }
		]);
	});

	it("treats the query as text, not a pattern", () => {
		expect(findMatches(["a.b", "axb"], "a.b")).toEqual([{ line: 1, start: 0, end: 3 }]);
	});

	it("finds nothing for an empty query and stops at the limit", () => {
		expect(findMatches(["a"], "")).toEqual([]);
		expect(findMatches(["aaaa"], "a", 2)).toHaveLength(2);
	});
});

describe("wrapIndex", () => {
	it("wraps both ways", () => {
		expect(wrapIndex(-1, 3)).toBe(2);
		expect(wrapIndex(3, 3)).toBe(0);
		expect(wrapIndex(0, 0)).toBe(-1);
	});
});