Test Automation Frameworks Guide: Everything You Need to Know

				
					function add(numbers) {

 return numbers.split(',')

 .map(x => parseInt(x))

 .reduce((a, b) => a + b);

 }

Input Expected Output

"5" 5

"4,5" 9

"1,2,3" 6

test('string with a single number should yield the number itself', () => {

 expect(add('5')).toBe(5);

 });

test('two numbers separated by comma should yield their sum', () => {

 expect(add('4,5')).toBe(9);

 });

test('three numbers separated by comma should yield their sum', () => {

 expect(add('1,2,3')).toBe(6);

});