const expect = require('expect');
const offset = require('./offset.js');


  test('offset is a Function', () => {
  expect(offset).toBeInstanceOf(Function);
});
  test('Offset of 0 returns the same array.', () => {
  expect(offset([1, 2, 3, 4, 5], 0), [1, 2, 3, 4, 5]).toEqual()
});
  test('Offset > 0 returns the offsetted array.', () => {
  expect(offset([1, 2, 3, 4, 5], 2), [3, 4, 5, 1, 2]).toEqual()
});
  test('Offset < 0 returns the reverse offsetted array.', () => {
  expect(offset([1, 2, 3, 4, 5], -2), [4, 5, 1, 2, 3]).toEqual()
});
  test('Offset greater than the length of the array returns the same array.', () => {
  expect(offset([1, 2, 3, 4, 5], 6),[1, 2, 3, 4, 5]).toEqual()
});
  test('Offset less than the negative length of the array returns the same array.', () => {
  expect(offset([1, 2, 3, 4, 5], -6), [1, 2, 3, 4, 5]).toEqual()
});
  test('Offsetting empty array returns an empty array.', () => {
  expect(offset([], 3), []).toEqual()
});