Test case for https://github.com/gamestdio/state-listener/

delta_test.ts

///<reference types="mocha" />
import { assert, expect } from "chai";
import { StateContainer, DataChange } from "../src";

function clone (data: any) {
    return JSON.parse(JSON.stringify(data));
}

describe("StateContainer", () => {
    let container: StateContainer<any>;
    let data: any;

    beforeEach(() => {
        data = {
            npc_entities: {
                npc: {
                    one: { x: 10, y: 0 },
                    two: { x: 0, y: 0 },
                }
            }
        };
        container = new StateContainer<any>(clone(data));
    });

    it("should trigger container callbacks before its properties", () => {
        let container = new StateContainer({});
        let npcs: any = {};

        container.listen("npc_entities/npc/:id", (change: DataChange) => {
            npcs[change.path.id] = change.value;
        });

        container.listen("npc_entities/npc/:id/:attribute", (change: DataChange) => {
            const npcId = change.path.id;
            const attribute = change.path.attribute;
            assert.ok(npcs[npcId], "npc should already exist");
            assert.equal(npcs[npcId][attribute], change.value);
        });

        container.set(clone(data));
    });
});