state.test.js

import { makeStateHandlers } from "../src/redux/store/state.js";

import assert from "assert";

describe("state.js", () => {
  describe("makeStateHandlers", () => {
    it("generates two functions from a state container input", () => {
        const stateContainer = [{ state: "state" }];
        const stateHandlers = makeStateHandlers(stateContainer);

        assert.equal(stateHandlers.hasOwnProperty("getState"), true);
        assert.equal(stateHandlers.hasOwnProperty("setState"), true);
    });

    it("getState should return the last state", () => {
        const stateContainer = [{ state: "state" }];
        const stateHandlers = makeStateHandlers(stateContainer);

        const expected = { state: "state" };
        const actual = stateHandlers.getState();

        assert.deepEqual(actual, expected);
    });

    it("setState should return the result of pushing a new item to the container", () => {
        const stateContainer = [{ state: "state" }];
        const newState = { state: "newState" };

        const stateHandlers = makeStateHandlers(stateContainer);

        const expectedContainer = [{ state: "state" }, { state: "newState" }];
        const expectedLength = 2;
        const actualLength = stateHandlers.setState(newState);
        const actualContainer = stateContainer;
      
        assert.equal(actualLength, expectedLength);
        assert.deepEqual(actualContainer, expectedContainer);
    });
  });
});