// jshint esversion: 6

const PositiveIntervals = require("../../src/util/typedCrossfilter/positiveIntervals");

describe("canonicalize", () => {
  test("empty", () => {
    expect(PositiveIntervals.canonicalize([])).toEqual([]);
  });

  test("simple, already correct", () => {
    expect(PositiveIntervals.canonicalize([[0, 1]])).toEqual([[0, 1]]);
    expect(PositiveIntervals.canonicalize([[0, 1], [2, 3]])).toEqual([
      [0, 1],
      [2, 3]
    ]);
  });

  test("non-canonical, need to be canonicalized", () => {
    expect(PositiveIntervals.canonicalize([[0, 1], [1, 2]])).toEqual([[0, 2]]);
    expect(PositiveIntervals.canonicalize([[1, 2], [2, 3]])).toEqual([[1, 3]]);
  });
});

describe("union", () => {
  test("empty range", () => {
    expect(PositiveIntervals.union([], [])).toEqual([]);
    expect(PositiveIntervals.union([], [[1, 2]])).toEqual([[1, 2]]);
    expect(PositiveIntervals.union([], [[1, 2], [3, 4]])).toEqual([
      [1, 2],
      [3, 4]
    ]);
    expect(PositiveIntervals.union([[3, 4]], [])).toEqual([[3, 4]]);
    expect(PositiveIntervals.union([[1, 2], [3, 4]], [])).toEqual([
      [1, 2],
      [3, 4]
    ]);
    expect(PositiveIntervals.union([[3, 3]], [])).toEqual([[3, 3]]);
    expect(PositiveIntervals.union([], [[3, 3]])).toEqual([[3, 3]]);
  });

  test("simple ranges", () => {
    expect(PositiveIntervals.union([[1, 2]], [[2, 3]])).toEqual([[1, 3]]);
    expect(PositiveIntervals.union([[2, 3]], [[1, 2]])).toEqual([[1, 3]]);
    expect(PositiveIntervals.union([[1, 2]], [[3, 4]])).toEqual([
      [1, 2],
      [3, 4]
    ]);
    expect(
      PositiveIntervals.union([[1, 2], [3, 4]], [[6, 7], [19, 40]])
    ).toEqual([[1, 2], [3, 4], [6, 7], [19, 40]]);
    expect(PositiveIntervals.union([[1, 4]], [[1, 1], [3, 4]])).toEqual([
      [1, 4]
    ]);
    expect(PositiveIntervals.union([[3, 3]], [[4, 4]])).toEqual([
      [3, 3],
      [4, 4]
    ]);
  });
});

describe("intersection", () => {
  test("empty range", () => {
    expect(PositiveIntervals.intersection([], [])).toEqual([]);
    expect(PositiveIntervals.intersection([], [[1, 2]])).toEqual([]);
    expect(PositiveIntervals.intersection([[1, 2]], [])).toEqual([]);
  });

  test("simple", () => {
    expect(PositiveIntervals.intersection([[1, 2]], [[2, 3]])).toEqual([]);
    expect(PositiveIntervals.intersection([[2, 3]], [[1, 2]])).toEqual([]);
    expect(PositiveIntervals.intersection([[1, 10]], [[1, 10]])).toEqual([
      [1, 10]
    ]);
    expect(PositiveIntervals.intersection([[1, 10]], [[2, 8]])).toEqual([
      [2, 8]
    ]);
    expect(PositiveIntervals.intersection([[2, 8]], [[1, 10]])).toEqual([
      [2, 8]
    ]);
    expect(PositiveIntervals.intersection([[1, 10]], [[2, 12]])).toEqual([
      [2, 10]
    ]);
    expect(PositiveIntervals.intersection([[2, 12]], [[1, 10]])).toEqual([
      [2, 10]
    ]);
    expect(PositiveIntervals.intersection([[1, 10]], [[1, 8]])).toEqual([
      [1, 8]
    ]);
    expect(PositiveIntervals.intersection([[1, 8]], [[1, 10]])).toEqual([
      [1, 8]
    ]);
    expect(PositiveIntervals.intersection([[1, 10]], [[1, 2], [6, 9]])).toEqual(
      [[1, 2], [6, 9]]
    );
    expect(PositiveIntervals.intersection([[0, 2638]], [[1363, 2638]])).toEqual(
      [[1363, 2638]]
    );
    expect(PositiveIntervals.intersection([[1, 2]], [[1, 2]])).toEqual([
      [1, 2]
    ]);
  });
});

describe("difference", () => {
  test("empty", () => {
    expect(PositiveIntervals.difference([], [])).toEqual([]);
    expect(PositiveIntervals.difference([], [[1, 10]])).toEqual([]);
    expect(PositiveIntervals.difference([[1, 10]], [])).toEqual([[1, 10]]);
  });

  test("simple", () => {
    expect(PositiveIntervals.difference([[1, 2], [3, 4]], [])).toEqual([
      [1, 2],
      [3, 4]
    ]);
    expect(PositiveIntervals.difference([[1, 2], [3, 10]], [[5, 10]])).toEqual([
      [1, 2],
      [3, 5]
    ]);
    expect(PositiveIntervals.difference([[1, 2], [3, 10]], [[0, 5]])).toEqual([
      [5, 10]
    ]);
    expect(
      PositiveIntervals.difference([[0, 2638]], [[0, 1363], [2055, 2638]])
    ).toEqual([[1363, 2055]]);
    expect(
      PositiveIntervals.difference([[0, 1363], [2055, 2638]], [[0, 2638]])
    ).toEqual([]);
    expect(PositiveIntervals.difference([[0, 10]], [[0, 1]])).toEqual([
      [1, 10]
    ]);
    expect(PositiveIntervals.difference([[0, 10]], [[1, 2]])).toEqual([
      [0, 1],
      [2, 10]
    ]);
    expect(PositiveIntervals.difference([[0, 10]], [[9, 10]])).toEqual([
      [0, 9]
    ]);
  });
});