import assert from "assert";
import { Store } from "../Store";
import { filter } from "./filter";

describe("filter", function () {
   it("should filter array elements", function () {
      let store = new Store({
         data: {
            array: [1, 2, 3],
         },
      });

      assert(store.update("array", filter, (x: number) => x > 1));
      assert.deepEqual(store.get("array"), [2, 3]);
   });

   it("should work with undefined arrays", function () {
      let store = new Store();
      assert.equal(
         false,
         store.update("array", filter, (x) => x > 1),
      );
      assert.deepEqual(store.get("array"), undefined);
   });

   it("returns same array if all elements satisfy condition", function () {
      let array = [1, 2, 3];
      let store = new Store({ data: { array } });
      assert.equal(
         false,
         store.update("array", filter, (x) => x > 0),
      );
      assert(store.get("array") === array);
   });
});