project-inter-server/test/types/TupleKeyTests.test.ts

import { describe, expect, it } from "@jest/globals";
import { TupleKey } from "../../src/types/TupleKey";

describe("TupleKey", () => {
  it("stores a value copy of the original tuple", () => {
    const tuple: [string, string] = ["150", "539"];
    const tupleKey = new TupleKey(...tuple);

    expect(tupleKey.tuple).toEqual(tuple);
  });

  it("returns a string representation of itself", () => {
    const tuple: [string, string] = ["150", "539"];
    const tupleKey = new TupleKey(...tuple);

    expect(`${tupleKey}`).toEqual("150|539");
  });

  it("supports usage as key in object", () => {
    const tupleKey1 = new TupleKey("1", "2");
    const tupleKey2 = new TupleKey("3", "4");

    const sampleObject = {
      [tupleKey1.toString()]: "value1",
      [tupleKey2.toString()]: "value2",
    };

    expect(sampleObject[tupleKey1.toString()]).toEqual("value1");
    expect(sampleObject[(new TupleKey("1", "2")).toString()]).toEqual("value1");
  });

  describe("fromExistingStringKey", () => {
    it("creates a new TupleKey from an existing string key", () => {
      const strKey = "hello|there";
      const tupleKey = TupleKey.fromExistingStringKey(strKey);
      expect(tupleKey.toString()).toEqual(strKey);
    });

    it("creates an empty tuple if there is no string", () => {
      const strKey = "";
      const tupleKey = TupleKey.fromExistingStringKey(strKey);
      expect(tupleKey.toString()).toEqual(strKey);
    })
  })
});