Insertion Sort Fixed Tests

app.test.js

const {insertionSort, swap} = require('./app');

//unit test
test('Swaps two array entries', () => {
  const arr1 = [1,2,3]
  swap(arr1, 0, 1);
  expect(arr1).toStrictEqual([2,1,3]);
});

//integration test
test('Sorts array from lowest to highest - insertion sort', () => {
    expect (insertionSort([8,5,3,1,2,4])).toStrictEqual([1,2,3,4,5,8]);
    expect (insertionSort([1,2,4])).toStrictEqual([1,2,4]);
    
});