aniplay-api/src/libs/sortByProperty.spec.ts

import { describe, expect, it } from "vitest";

import { sortByProperty } from "./sortByProperty";

describe("sortByProperty", () => {
  it("ascending order, array stays same", () => {
    const sorted = [{ key: "a" }, { key: "b" }, { key: "c" }].sort(
      sortByProperty({ a: 1, b: 2, c: 3 }, "key"),
    );

    expect(sorted).toEqual([{ key: "a" }, { key: "b" }, { key: "c" }]);
  });

  it("descending order, array is reversed", () => {
    const sorted = [{ key: "a" }, { key: "b" }, { key: "c" }].sort(
      sortByProperty({ a: 3, b: 2, c: 1 }, "key"),
    );

    expect(sorted).toEqual([{ key: "c" }, { key: "b" }, { key: "a" }]);
  });

  it("randomized order, array is randomized", () => {
    const sorted = [
      { key: "a" },
      { key: "b" },
      { key: "c" },
      { key: "d" },
      { key: "e" },
    ].sort(sortByProperty({ a: 3, b: 4, c: 1, d: 2, e: 5 }, "key"));

    expect(sorted).toEqual([
      { key: "c" },
      { key: "d" },
      { key: "a" },
      { key: "b" },
      { key: "e" },
    ]);
  });

  it("object without expected property gets put to end of array", () => {
    const sorted = [
      { key: "a" },
      { different: "key" },
      { key: "b" },
      { key: "c" },
    ].sort(sortByProperty({ a: 3, b: 2, c: 1, key: 0 }, "key"));

    expect(sorted).toEqual([
      { key: "c" },
      { key: "b" },
      { key: "a" },
      { different: "key" },
    ]);
  });
});