beeblebrox3 / star

import ServicesContainer from "../ServicesContainer";

const equals = (actual, expected) => expect(actual).toBe(expected);

const instance = new ServicesContainer();

const service = function () {

    let internalVar = "initial value";

    this.setVar = function (value) {

        internalVar = value;

    }

test("error when service is not registered", () => {

    expect(() => instance.get("undefinedService")).toThrowError("Service undefinedService not found");

});

test("share same instance with multiple calls", () => {

    instance.register("a", service);

    equals(instance.get("a").getVar(), "initial value");

    instance.get("a").setVar("x");

    equals(instance.get("a").getVar(), "x");

    equals(instance.get("a").getVar(), "x");

});

test("it's possible to get a new instance", () => {

    instance.register("b", service);

    equals(instance.get("b").getVar(), "initial value");

    instance.get("b").setVar("x");

    equals(instance.get("b").getVar(), "x");

    equals(instance.getNewInstance("b").getVar(), "initial value");

    equals(instance.get("b").getVar(), "x");

});

test("impossible to get a new instance when it is a singleton", () => {

    equals(instance.get("c").getVar(), "initial value");

    expect(() => instance.getNewInstance("c")).toThrowError("Service c is an singleton, you cannot create a new instance");

});