Insertion Sort Initial Tests

app.test.js

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

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