import unionIntersect from "./unionIntersect";

const tests = [
  [
    "merges identical arrays",
    [
      [1, 2, 3, 4, 5],
      [1, 2, 3, 4, 5],
      [1, 2, 3, 4, 5],
    ],
    [1, 2, 3, 4, 5],
  ],
  [
    "merges arrays with smaller initial array",
    [
      [1, 2, 4, 5],
      [1, 2, 3, 4, 5],
      [1, 2, 3, 4, 5],
    ],
    [1, 2, 4, 5],
  ],
  [
    "merges arrays with larger initial array",
    [
      [1, 2, 3, 4, 5, 6, 7],
      [1, 2, 3, 4, 5],
      [1, 2, 3, 4, 5],
    ],
    [1, 2, 3, 4, 5],
  ],
  [
    "merges arrays with empty initial array",
    [
      [],
      [1, 2, 3, 4, 5],
      [1, 2, 3, 4, 5],
    ],
    [],
  ],
  [
    "merges arrays with empty array",
    [
      [1, 2, 3, 4, 5],
      [],
      [1, 2, 3, 4, 5],
    ],
    [],
  ],
  [
    "merges arrays with empty array",
    [
      [1, 2, 3, 4, 5],
      [],
      [1, 2, 3, 4, 5],
    ],
    [],
  ],
  [
    "merges arrays with no overlap",
    [
      [1, 2, 3],
      [4, 5, 6],
      [7, 8, 9],
    ],
    [],
  ],
  [
    "merges arrays with some overlap",
    [
      [1, 2, 3, 4, 5, 6],
      [4, 5, 6, 7, 8, 9],
      [6, 7, 8, 9, 10, 11, 12],
    ],
    [6],
  ],
  [
    "does not support objects",
    [
      [{ key: "value" }, { key: "value2" }],
      [{ key: "value" }, { key: "value3" }],
      [{ key: "value" }, { key: "value4" }],
    ],
    [],
  ],
];

describe("unionIntersect", () => {
  tests.forEach(([desc, arrays, expected]) => {
    it(desc, () => {
      expect(unionIntersect(...arrays)).toStrictEqual(expected);
    });
  });
});