import {removeAtIndex, replaceAtIndex, insertAtIndex, pushToArray } from '@/graphql/immutable-operations';
describe('Cache operations', () => {
  it('removes at index', () => {
    const original = [1, 2, 3];
    const copy = removeAtIndex(original, 1);
    expect(original.length).toBe(3);
    expect(original).toEqual([1, 2, 3]);
    expect(copy.length).toBe(2);
    expect(copy).toEqual([1, 3]);

    original.push(4);
    expect(original.length).toBe(4);
    expect(original).toEqual([1, 2, 3, 4]);
    expect(copy.length).toBe(2);
    expect(copy).toEqual([1, 3]);
  });

  it('replaces at index', () => {
    const original = [1, 2, 3];
    const copy = replaceAtIndex(original, 1, 234);
    expect(original.length).toBe(3);
    expect(original).toEqual([1, 2, 3]);
    expect(copy.length).toBe(3);
    expect(copy).toEqual([1, 234, 3]);

    original.push(4);
    expect(original.length).toBe(4);
    expect(original).toEqual([1, 2, 3, 4]);
    expect(copy.length).toBe(3);
    expect(copy).toEqual([1, 234, 3]);
  });

  it('inserts at index', () => {
    const original = [1, 2, 3];
    const copy = insertAtIndex(original, 1, 234);
    expect(original.length).toBe(3);
    expect(original).toEqual([1, 2, 3]);
    expect(copy.length).toBe(4);
    expect(copy).toEqual([1, 234, 2, 3]);

    original.push(4);
    expect(original.length).toBe(4);
    expect(original).toEqual([1, 2, 3, 4]);
    expect(copy.length).toBe(4);
    expect(copy).toEqual([1, 234, 2, 3]);
  });

  it('pushed to array', () => {
    const original = [1, 2, 3];
    const copy = pushToArray(original, 5);
    expect(original.length).toBe(3);
    expect(original).toEqual([1, 2, 3]);
    expect(copy.length).toBe(4);
    expect(copy).toEqual([1, 2, 3, 5]);

    original.push(4);
    expect(original.length).toBe(4);
    expect(original).toEqual([1, 2, 3, 4]);
    expect(copy.length).toBe(4);
    expect(copy).toEqual([1, 2, 3, 5]);
  });

});