import { describe, expect, it } from "@suaveplan/testing/runner";
import { findChangedTrackIds } from "./undo.js";

describe("findChangedTrackIds", () => {
    it("returns empty when tracks are identical", () => {
        const t = {
            id: "t1",
            name: "A",
            clips: [],
            volume: 1,
            pan: 0,
            muted: false,
            soloed: false,
        };
        expect(findChangedTrackIds([t], [{ ...t }])).toEqual([]);
    });

    it("detects removed tracks", () => {
        const t = {
            id: "t1",
            name: "A",
            clips: [],
            volume: 1,
            pan: 0,
            muted: false,
            soloed: false,
        };
        expect(findChangedTrackIds([t], [])).toEqual(["t1"]);
    });

    it("detects added tracks", () => {
        const t = {
            id: "t1",
            name: "A",
            clips: [],
            volume: 1,
            pan: 0,
            muted: false,
            soloed: false,
        };
        expect(findChangedTrackIds([], [t])).toEqual(["t1"]);
    });

    it("detects changed tracks", () => {
        const a = {
            id: "t1",
            name: "A",
            clips: [],
            volume: 1,
            pan: 0,
            muted: false,
            soloed: false,
        };
        const b = {
            id: "t1",
            name: "B",
            clips: [],
            volume: 1,
            pan: 0,
            muted: false,
            soloed: false,
        };
        expect(findChangedTrackIds([a], [b])).toEqual(["t1"]);
    });
});