1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
import { swap } from './swap';const list = ['a', 'b', 'c', 'd', 'e', 'f'];
it('swaps an element from one index to the other', () => {	expect(swap(0, 1, list)).toEqual(['b', 'a', 'c', 'd', 'e', 'f']);	expect(swap(2, 1, list)).toEqual(['a', 'c', 'b', 'd', 'e', 'f']);	expect(swap(-1, 0, list)).toEqual(['f', 'b', 'c', 'd', 'e', 'a']);	expect(swap(4, 1, list)).toEqual(['a', 'e', 'c', 'd', 'b', 'f']);});
it('does nothing when indexes are outside the list boundaries', () => {	expect(swap(-20, 2, list)).toEqual(list);	expect(swap(20, 2, list)).toEqual(list);	expect(swap(2, 20, list)).toEqual(list);	expect(swap(2, -20, list)).toEqual(list);	expect(swap(20, 20, list)).toEqual(list);	expect(swap(-20, -20, list)).toEqual(list);});
it('does nothing when indexes are equal', () => {	expect(swap(0, 0, list)).toEqual(list);});
it('should be the same when swapping index order', () => {	expect(swap(0, 1, list)).toEqual(swap(1, 0, list));});
it('swaps property values from one property to another', () => {	expect(swap('a', 'b', { a: 1, b: 2 })).toEqual({ a: 2, b: 1 });	expect(swap('b', 'a', { a: 1, b: 2 })).toEqual({ a: 2, b: 1 });});
it('does nothing when property names are not defined', () => {	expect(swap('a', 'b', { a: 1 })).toEqual({ a: 1 });	expect(swap('a', 'b', { b: 2 })).toEqual({ b: 2 });});
it('swaps characters in string from one index to another', () => {	expect(swap(0, 2, 'foo')).toEqual('oof');});